[Capistrano] Re: building custom config files...
Hi Peter, On Mar 3, 5:39 pm, Peter Booth pbo...@nocoincidences.com wrote: Gerhardus, On Mar 2, 2009, at 11:46 AM, Gerhardus Geldenhuis wrote: Hi Peter, I already use the multistage gem which works very well for us. multistage is excellent at providing a structure for stage-specific configuration. I am reluctant to add any bits of config file in my capistrano tasks. I prefer to keep implementation and content seperate (read: The art of unix programming). That allows me to version my config files using an external versioning tool and keep all configs together. I'm not clear how separating or lumping implementation and content influence whether or not you can use an external versioning tool and keep all configs together. ... what I meant was that I see capistrano as a program. I was taught rightly or wrongly to have as little as possible constants in my code/program and keep things were possible elegant but not at the sake of elegance. The config files for me is dynamic even if it never changes and I would like to keep config files and capistrano seperate. In the example you gave you build a config file in your capistrano code. In hindsight that probably does not matter that much really and when I looked at it again I aggreed with how you had done it. In the past I have used ERB to generate Apache and Tomcat config files. In that case the template began as a vanilla nginx config, was modified iteratively as I tuned the config, and the plugged in values only represent what runs where. If I understand you correctly, this would meet your criteria about separating implementation and content. There are some situations when configuration generation requires logic that doesn't neatly fit the template approach (e.g. Use SSL for application X, unless we're sharing a host, and ensure that the environments that use a hardware load-balancer use the website name and not the hostname for the name based virtual server ...) The strength of Capistrano over Ant is that it's an internal DSL implemented in a scripting language. By using XML, Ant is much less powerful and much more painful to use. In this case, thinking of configuration as live logic rather than simply data simplifies things. Thanks for that, a friend was asking why not use ANT, which I don't know, and thus provides a good answer. The monit example is not one of these situations. Rather there is no intellectual capital in the static content. The method you saw was part of a module that creates simple config files. Now in that example all the generated config files were stored in subversion, in a tree that is rooted by host. A question... Why do you keep generated config files in svn too? I was thinking of only keeping the stubs in svn and use capistrano to directly deploy generated files(generated by cap using the stubs). I can think of reason to store generated configs in svn but would be interested to hear your opinion on this. If I could download a file to the deploy platform, build the config file and then send this out to nodes that would be preferable to doing that's what I do - what's stopping you from doing this? Nothing really, except time. I like the idea though and keep it in mind for version 2 of my deployment script. a local svn checkout on each node and building the config file seperately on each server. I prefer build once deploy many to deploy many, build many. Agreed. The fact that we're disagreeing here suggests that either I dont understand your question, that its more complex than I imagine, or that there is some existing Capistrano functionality that you're not aware of. Probably a bit of all of the above :-) I am still very much learning capistrano and adapting to the methodology it uses and am bound to make a few(hopefully only a few) stupid mistakes. I have also never worked in a place that have done versioning of configs and am learning as I go along. Hopefully my documentation (internal docs) will be read and people will actually use it. I have already realized that some things that I have written in capistrano can be done differently and potentially better but at the moment it just needs to work. Stepping back, one open question is, do you centralize the What runs where? knowledge in a single place? One could use a YAML file, and generate the stage specific files needed for multi-stage, at the same time as generating web server configs and the like. I think its inelegant and a pain in the ass to have to open multiple files to configure this stuff. I am not sure I understand the question completely. The company for which I am contracting have many different application environments with a diverse set of components and configurations making up the various environments/platforms. (oracle, mysql, tomcat, jboss, websphere) There is not yet a centralized what runs where place with regards
[Capistrano] a suggestion idea
Hi It would be nice to have something like the following: namespace config task :copyconfig, :roles = appservers do_something end task :copyconfig, :roles = dbservers do_something end end the idea being that if you call config.copyconfig it will get called twice but for each role type it is definined. If there is another way to achieve this I would gladly hear about it. at them moment I have to differentiate my tasks by giving them different names for each task that deploys config to server types. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] building custom config files...
Hi I want to create custom config files and would appreciate any tips if anyone has attempted the same thing. I am planning to do it in the following way: Download the config files using run command with svn insert and append the config files using the run command with sed and awk based on the servers in my roles. Typically what I am going to do is setup our modjk loadbalancer according the the list of tomcat application servers. We also loadbalance accross our apaches that run modjk and I intend using capistrano to build/customize there config files too. What I am trying to achieve is that after having build the servers the only other step I need to do is write a capistrano config and then run 1 or 2 cap commands to deploy new configs and applications to my environment. Eventually I can reverse the steps; write the config file first which then takes care of building the virtual servers and configuring them. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: building custom config files...
Hi Peter,
I already use the multistage gem which works very well for us.
I am reluctant to add any bits of config file in my capistrano tasks.
I prefer to keep implementation and content seperate (read: The
art of unix programming). That allows me to version my config files
using an external versioning tool and keep all configs together.
If I could download a file to the deploy platform, build the config
file and then send this out to nodes that would be preferable to doing
a local svn checkout on each node and building the config file
seperately on each server. I prefer build once deploy many to deploy
many, build many.
Regards
On Mar 2, 4:06 pm, Peter Booth pbo...@nocoincidences.com wrote:
What you describe sounds kind of painful. I'm assuming that you are
already using Capistrano for something.
I had to solve a similar problem so as to allow multiple
stages (dev, qa, uat, prod, ...) to run
on a single host without port or directory clashes. It was amazingly
easy with capistrano and
the capistrano-ext gem, which allows you to create stage-specific
config files.
I would create the file dynamically as part of the deploy with code
that looks like that below.
Peter
def build_monit_config( application, application_id, stage, stage_id,
instance)
monit_config = ## Monit Configuration File\n\n
monit_config \n# stage: #{stage}\n# stage ID: #{stage_id}
\n# instance: #{instance}\n\n# Produced automatically at:
#{Time.now}\n
first_port = fetch(:start_port)
top_port = first_port + fetch(:num_proc) - 1
first_port.upto(top_port) { |i|
�...@path = /var/www/domains/signalpatterns.com/#{application}/
#...@stage}/#...@instance}
�...@log_dir = #...@path}/htdocs/current/log
�...@config_dir = #...@path}/htdocs/shared/config
�...@pid_dir = #...@path}/htdocs/shared/pids
cfg = -CMD
check process #{application}-#{i} with pidfile #...@pid_dir}/
#{application}-mongrel.#{i}.pid
start program = /usr/bin/mongrel_rails cluster::start -C
#...@config_dir}/mongrel_cluster.yml -v --clean --only #{i}
stop program = /usr/bin/mongrel_rails cluster::stop -C
#...@config_dir}/mongrel_cluster.yml -v --force --only #{i}
if failed urlhttp://localhost:#{i}/monit
with timeout 10 seconds
then restart
if failed urlhttp://localhost:#{i}/monit
with timeout 10 seconds for 2 cycles
then
exec /bin/bash -c 'kill -9 `cat #...@pid_dir}/
#{application}-mongrel.#{i}.pid`'
group #...@id}
##
CMD
monit_config cfg
}
monit_config
end
On Mar 2, 2009, at 9:50 AM, Gerhardus Geldenhuis wrote:
Hi
I want to create custom config files and would appreciate any tips if
anyone has attempted the same thing.
I am planning to do it in the following way:
Download the config files using run command with svn
insert and append the config files using the run command with sed and
awk based on the servers in my roles.
Typically what I am going to do is setup our modjk loadbalancer
according the the list of tomcat application servers.
We also loadbalance accross our apaches that run modjk and I intend
using capistrano to build/customize there config files too.
What I am trying to achieve is that after having build the servers the
only other step I need to do is write a capistrano config and then run
1 or 2 cap commands to deploy new configs and applications to my
environment.
Eventually I can reverse the steps; write the config file first which
then takes care of building the virtual servers and configuring them.
Regards
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[Capistrano] Re: Capistrano maintainership
Hi I am just glad someone is willing to step in so quickly. I think capistrano and webistrano is both great products but with an original focus on ruby/rails applications. I believe that with a bit of effort ( a bit more in webistrano) it could easily be made to be more generic. Currently I have to bend webistrano a bit to get it working nicely with our internal deployment methodologies. I have been working hard to get our specific tomcat/jboss deployments working well in a loadbalanced 24/7 environment doing simultaneous and sequential deployments and I am excited about how capistrano has enabled me to do this and about the future of the tool. I am hopefull that when I get a chance I can make the tasks I have written a bit more generic so anyone can use it for tomcat deployments. There is'nt really that much deployment tools for tomcat so I reckon that if you could design a good generic deployment strategy for tomcat together with some generic load balancer interfaces to lb's like modjk and mod_proxy (even F5) you could have a whole new slew of users. Especially with closer integration with webistrano to simplify the usage. The single sign on in webistrano is sure to score lots of points in corporate environments. Regards On Feb 26, 11:55 am, Lee Hambley lee.hamb...@gmail.com wrote: Hi All, I'm a little suspect of the Webistrano/Macistrano guys taking over development, as I feel particularly that Webistrano limits the capabilities of capistrano and limits it usefulness for non-rails projects. Whilst there's still a market for simple-one-push rails deploys, with accountability; But I would be hoping for some kind of reassurance that Web/Macistrano would remain separate projects, and would not affect capistrano in any way. I do feel that someone that knows the Capistrano internals should take over, I'd have volunteered, except my skills lay in using Capistrano, for complex deploys; not particularly in changing internals, and fixing bugs, and those sorts of things. Whoever takes it over should be prepared to start living in IRC, and start up a drive to get documentation written... and try and drive it as *the* way to handle deployment. Even since Net::SSH-Multi - my interest in capistrano has slipped a little, as for the most part, my deploys aren't very compatible with the capistrano notion of a single app over a few roles of servers. I'm looking forward to whatever happens with Capistrano, Jamis has left us with an exceptional bit of code, we owe it to him to make the right decision about where to take it next. I will be forking copies of the libraries on Github, to make some changes to the way cap logs out to the screen, some things that have come up from time to time on the mailing list, about problems with how, and where capistrano logs, as well as some stuff I want to do with the output to the screen (does that count as logging?) Before we all fork-off and make our own changes, I fear that there will be no go-to-guy for a 'right' version of capistrano that scares me a lot, as it raises the barrier to entry far higher than it needs to be... (will_paginate... Vs. mislavs_will_paginate anyone?) - Lee 2009/2/26 Simone Carletti wep...@gmail.com Thanks for your feedback Karel! I agree that Capistrano needs more documentation and I'm happy to hear someone else is available to contribute. I must confess I didn't notice your message before, I'm going to post a reply athttp://groups.google.com/group/capistrano/msg/654e5e84d45f9098 Talking about the future of maintainership, I'm going to contact Jonathan directly to accelerate the process. It would be wonderful to get a feedback from Jamis about this topic. I'm a bit concerned about how we can carry on development without the need to force people to change gem name or repository. -- Simone On Thu, Feb 26, 2009 at 11:36 AM, Karel Minarik karel.mina...@gmail.comwrote: Karel --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] writing a preflightcheck task
Hi
Version 1
task :check_lb_worker_exists, :roles = :apacluster, :on_error
= :abort do
if exists?(:modjk_loadbalancerworker) then
begin
run if wget #{wgetparams} 'http://$CAPISTRANO:HOST$/jkserver-
status?cmd=editfrom=listw=#{modjk_loadbalancerworker}' | grep
'ERROR'; then false;else true;fi 22/dev/null;
rescue
puts The specified modjk load balancer worker does not
exists
end
end
end#task
calling the task:
task :preflightcheck, :on_error = :abort do
unless exists?(:app_path)
abort The download path variable app_path has not been specified
end
modjk.check_lb_worker_exists
puts 'Everything is fine'
end
This version works fine except that everything is always fine
regardless whether the check_lb_worker_exists failed or not
version 2
~~~
task :check_lb_worker_exists, :roles = :apacluster, :on_error
= :abort do
if exists?(:modjk_loadbalancerworker) then
run if wget #{wgetparams} 'http://$CAPISTRANO:HOST$/jkserver-
status?cmd=editfrom=listw=#{modjk_loadbalancerworker}' | grep
'ERROR'; then false;else true;fi ;
end
end#task
task :preflightcheck, :on_error = :abort do
unless exists?(:app_path)
abort The download path variable app_path has not been specified
end
unless not modjk.check_lb_worker_exists
abort 'horribly broken'
end
puts 'all looks fine!'
end
In version two if the check_lb_worker task fails that failure does not
get handled by the unless abort block in the main preflight check.
Basically I am trying to do the following:
task preflight
unless run(some command) fail
unless run_task_check1, fail with nice message
unless run_task_check2, fail with nice message
if nothing failed then put everything looks ok
end
I am struggling to get the final everything looks ok message to
display only if everything really is ok because at the moment it
displays regardless. I hope this is all making some kind of sense...
otherwise I will have to try again.
Regards
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[Capistrano] Re: writing a preflightcheck task
Thanks
Rather logical in retrospec :-) ... it works well now.
Slowly but surely I am getting there.
Regards
On Feb 20, 4:37 pm, Jamis Buck ja...@37signals.com wrote:
If an exception is raised, it does not cause a task to return a value;
it causes a task to raise an exception. You need to use a begin/rescue
clause, instead of an unless condition.
begin
some.task
rescue Exception = e
puts got exception: #{e}
end
Does that make sense? Exceptions bypass your program logic and require
explicit handling.
- Jamis
On 2/20/09 9:28 AM, Gerhardus Geldenhuis wrote:
Hi
Version 1
task :check_lb_worker_exists, :roles = :apacluster, :on_error
= :abort do
if exists?(:modjk_loadbalancerworker) then
begin
run if wget #{wgetparams} 'http://$CAPISTRANO:HOST$/jkserver-
status?cmd=editfrom=listw=#{modjk_loadbalancerworker}' | grep
'ERROR'; then false;else true;fi 22/dev/null;
rescue
puts The specified modjk load balancer worker does not
exists
end
end
end#task
calling the task:
task :preflightcheck, :on_error = :abort do
unless exists?(:app_path)
abort The download path variable app_path has not been specified
end
modjk.check_lb_worker_exists
puts 'Everything is fine'
end
This version works fine except that everything is always fine
regardless whether the check_lb_worker_exists failed or not
version 2
~~~
task :check_lb_worker_exists, :roles = :apacluster, :on_error
= :abort do
if exists?(:modjk_loadbalancerworker) then
run if wget #{wgetparams} 'http://$CAPISTRANO:HOST$/jkserver-
status?cmd=editfrom=listw=#{modjk_loadbalancerworker}' | grep
'ERROR'; then false;else true;fi ;
end
end#task
task :preflightcheck, :on_error = :abort do
unless exists?(:app_path)
abort The download path variable app_path has not been specified
end
unless not modjk.check_lb_worker_exists
abort 'horribly broken'
end
puts 'all looks fine!'
end
In version two if the check_lb_worker task fails that failure does not
get handled by the unless abort block in the main preflight check.
Basically I am trying to do the following:
task preflight
unless run(some command) fail
unless run_task_check1, fail with nice message
unless run_task_check2, fail with nice message
if nothing failed then put everything looks ok
end
I am struggling to get the final everything looks ok message to
display only if everything really is ok because at the moment it
displays regardless. I hope this is all making some kind of sense...
otherwise I will have to try again.
Regards
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[Capistrano] logger vs puts
Hi Is it recommended to use logger.info or should I rather be using puts? Also is there options other than logger.info and I would appreciate it if you could point me to the source code for logger which would probably answer my second question. Best Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: logger vs puts
Thanks from the help text: -v, --verboseBe more verbose. May be given more than once and the source: IMPORTANT = 0 INFO = 1 DEBUG = 2 TRACE = 3 can I assume that cap -v = 0 cap -vv = 1 cap -vvv= 2 cap - =3 If so I would like to submit a change to the help text to make it more clear. Regars On Feb 20, 6:05 pm, Jamis Buck ja...@37signals.com wrote: Using logger appropriately will let your own log statements display or hide based on the -v switch for Capistrano. See capistrano/logger.rb for the source. - Jamis On 2/20/09 11:00 AM, Gerhardus Geldenhuis wrote: Hi Is it recommended to use logger.info or should I rather be using puts? Also is there options other than logger.info and I would appreciate it if you could point me to the source code for logger which would probably answer my second question. Best Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: raising exeptions
Found a good solution:
unless exists?(:app_path)
abort I failed
end
On Feb 17, 10:58 am, Gerhardus Geldenhuis
gerhardus.geldenh...@gmail.com wrote:
Hi
I assumed that if I purposely raised an exception it would show my
error message and stop. Capistrano/ruby does that but it also included
a whole bunch of other items that would confuse my users.
deploy-config.rb:92:in `load': I failed (RuntimeError)
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/execution.rb:128:in `instance_eval'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/execution.rb:128:in
`invoke_task_directly_without_callbacks'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/callbacks.rb:27:in `invoke_task_directly'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/execution.rb:81:in `execute_task'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/execution.rb:93:in `find_and_execute_task'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:45:in
`execute_requested_actions_without_help'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:44:in `each'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:44:in
`execute_requested_actions_without_help'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/help.rb:19:in `execute_requested_actions'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:33:in `execute!'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:14:in `execute'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/bin/cap:4
from /usr/bin/cap:16:in `load'
from /usr/bin/cap:16
can I raise exceptions more silently or am I missing the point?
my code:
task :gg, :roles = :appservers do
# set(:revision) { query_revision } unless exists?(:revision)
run echo #{revision}
unless not exists?(:revision)
raise I failed
end
end
Regards
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[Capistrano] raising exeptions
Hi
I assumed that if I purposely raised an exception it would show my
error message and stop. Capistrano/ruby does that but it also included
a whole bunch of other items that would confuse my users.
deploy-config.rb:92:in `load': I failed (RuntimeError)
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/execution.rb:128:in `instance_eval'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/execution.rb:128:in
`invoke_task_directly_without_callbacks'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/callbacks.rb:27:in `invoke_task_directly'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/execution.rb:81:in `execute_task'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/execution.rb:93:in `find_and_execute_task'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:45:in
`execute_requested_actions_without_help'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:44:in `each'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:44:in
`execute_requested_actions_without_help'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/help.rb:19:in `execute_requested_actions'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:33:in `execute!'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:14:in `execute'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/bin/cap:4
from /usr/bin/cap:16:in `load'
from /usr/bin/cap:16
can I raise exceptions more silently or am I missing the point?
my code:
task :gg, :roles = :appservers do
#set(:revision) { query_revision } unless exists?(:revision)
run echo #{revision}
unless not exists?(:revision)
raise I failed
end
end
Regards
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[Capistrano] staggered deploy revisited
Hi
I have managed to confuse myself again...
I am trying to do the following:
my staggered deploy scripts cycles through a list of application
servers doing the following:
disable app server on multiple load balancers
install new app
enable app server on multiple load balancers
continue on to next one.
I thought that I could re-use the basic deployment script for my
appservers that I wrote but when I call it in in my sequential task it
executes the task for all the defined appservers even if I call it in
the following way:
tomcat.deploy :hosts = server
The staggered deploy task:
desc Deploys application to sequentially to one server at a time
task :staggered_deploy do
find_servers(:roles = :appservers).each do |server|
set :current_tomcat, #{server.host}
modjk.disablenode
puts application deployment
###
puts deploying new appliation
tomcat.deploy :hosts = server
puts new application succesfully deployed
puts application deployment
###
modjk.enablenode
puts
end
end
I simplified my deploy script for the sake of testing:
desc Deploy a new tomcat application
task :deploy, :roles = :appservers do
# tomcat.prepare_deploy_env
# tomcat.download_app
# tomcat.remove_from_webapps
# tomcat.stop
# ##check for running instances
# tomcat.cleanup_deploy_dirs
# tomcat.start
# tomcat.move_to_webapps
# monitor.app_startup
test123
end
task :test123, :roles = :appservers do
run uname -a
end
The only solution I can think of at the moment is to write a separate
duplicate set of tasks for staggered deploy where the roles variable
is called something like staggered_role which gets set with a new
value for every appserver that I want to deploy to while looping
through the app server list.
I thought that if I called tomcat.deploy task in the following way:
tomcat.deploy :hosts = server
that the hosts value would override the predefined roles value and
that the task and all tasks that it is calling would only execute on
the list of servers in the server variable.
I would really appreciate it if you could assist me in clearing up
this confusion.
Regards
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[Capistrano] Re: staggered deploy revisited
Thanks, I am going to try that right now. How do you feel about a sequential extention to capistrano? Any thoughts on how it could fit in with the current structure? Regards On Feb 16, 3:16 pm, Jamis Buck ja...@37signals.com wrote: If you want subtasks to use a particular host, you need to set the HOSTS or HOSTFILTER environment variables. E.g. find_servers(...).each do |server| ENV['HOSTFILTER'] = server.host sub.task.here ENV['HOSTFILTER'] = nil end It's extremely ugly and hacky and I don't like it, but there's not currently another way to do it. - Jamis On 2/16/09 5:09 AM, Gerhardus Geldenhuis wrote: I have also put the relevant code onhttp://pastie.org/390600 Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: staggered deploy revisited
Hi
No code atm I'm afraid but I will share some ideas/requirements/
thoughts
We do a state check of the application before removing it from the
cluster which we can use to compare with after new deployment.
We have a level1 and level2 check for applications. Level1 check
functional deployment in tomcat, which basically checks the
application server.
Level2 actually submits a request to check complete infrastructure
functionality and parses xml( that is the intend anyway still needs to
be written)
We want to build in a failure percentage that if you have 10 servers
and 1 fails after 5 deployments, deployment should continue until in
reaches a failure percentage, say 20%.
The modjk tasks I have written that act as our loadbalancers actually
works quite well, once I have extended it a bit more I will gladly
share the code.
I think sequential deploy will need some generic loadbalancer/cluster
tasks build-in.
At the moment we use something like the following:
run wget --quiet -O - --connect-timeout=1 --timeout=1 --tries=1
'http://$CAPISTRANO:HOST$/jkserver-status?cmd=updatefrom=listw=#
{modjk_loadbalancergroup}sw=#{current_tomcat}wa=1wf=1wn=#
{current_tomcat}wr=wc=wd=0' 12/dev/null
maybe a wrapper to allow easier/simplified http interaction with put
and get might be usefull. (perhaps even some xml manipulation)
Anyway just some random thoughts.
Regards
On Feb 16, 3:44 pm, Jamis Buck ja...@37signals.com wrote:
On 2/16/09 8:37 AM, Gerhardus Geldenhuis wrote:
Thanks, I am going to try that right now.
How do you feel about a sequential extention to capistrano? Any
thoughts on how it could fit in with the current structure?
I think that'd be great. Even as something for Capistrano core. I've
needed, and others have needed it, so I'm sure it'd be useful.
In general, I'd really love to get away from the ROLES, HOSTS, and
HOSTFILTER environment variables. I just don't know where to go instead
of those, and honestly, I haven't spent much time thinking about it.
If you have any ideas, please feel free to hack on them and see what you
come up with.
- Jamis
Regards
On Feb 16, 3:16 pm, Jamis Buck ja...@37signals.com wrote:
If you want subtasks to use a particular host, you need to set the HOSTS
or HOSTFILTER environment variables. E.g.
find_servers(...).each do |server|
ENV['HOSTFILTER'] = server.host
sub.task.here
ENV['HOSTFILTER'] = nil
end
It's extremely ugly and hacky and I don't like it, but there's not
currently another way to do it.
- Jamis
On 2/16/09 5:09 AM, Gerhardus Geldenhuis wrote:
I have also put the relevant code onhttp://pastie.org/390600
Regards
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[Capistrano] Checking for variable existence
Hi I vaguely recall seeing a way to test for empty or non-existent variables but could not find it going through my archives. I want to know if there is a way to test whether a variable has been declared/have a value? Basically I want to write a pre-flight check program that checks that users have properly written a config file for a specific environment and that the deployment does not come down like a house of cards if one variable is missing. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: Checking for variable existence
Exactly what I wanted. Maybe I should add an entry to the FAQ... I got the first of 3 of 12 inoculations this week for a long trip and ever since have not been able to think straight. :-) Well at least it is an original excuse. Regards On Feb 13, 3:01 pm, Jamis Buck ja...@37signals.com wrote: See the #exists?(:var) method: http://wiki.capify.org/article/Exists%3F Hope that helps, Jamis On 2/13/09 7:29 AM, Gerhardus Geldenhuis wrote: Hi I vaguely recall seeing a way to test for empty or non-existent variables but could not find it going through my archives. I want to know if there is a way to test whether a variable has been declared/have a value? Basically I want to write a pre-flight check program that checks that users have properly written a config file for a specific environment and that the deployment does not come down like a house of cards if one variable is missing. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Caching in Capistrano
Hi is any caching that capistrano does only for the duration of a running cap command? I have seen some weird errors which I thought might potentially caching related. Basically I thing this variable was not being set $CAPISTRANO:HOST$ properly which caused some of the tasks to not work correctly... Is there a way to control/clear caching? Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: Staggered Install
Hi I have finally found time to start implementing this but am a bit stuck atm. I am not sure how to convert this code snippet into a working task. I also need to adapt my task to work in a multistage environment where I set my role definition in each stage's config file. Regards On Jan 28, 3:31 pm, Jamis Buck ja...@37signals.com wrote: find_servers(:roles = :foo).each do |server| run disable server on load balancer, :host = server run install new software, :host = server run test server, :host = server # etc. end - Jamis On 1/28/09 8:16 AM, Gerhardus Geldenhuis wrote: Hi I need to do something like the following: for server in role do Disable server on load balancer Install new software Test Server Enable server in load balancer If successful then deploy next server else fail/rollback. done The individual steps is not a problem but I am unsure how to approach the sequential install in a capistrano way. I could not find anything on the wiki or list archives. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: Staggered Install
I were probably doing something stupid... Its working now, but... it loops through the list of servers and the executes the task for each server 16 times in total. role :dev_xml_gerrard, longtct03g, longtct03h, longtct03i, longtct03j task :foo, roles = :dev_xml_gerrard do find_servers(:roles = :dev_xml_gerrard).each do |server| run uname -a run sleep 4 end end I have taken multistage out of the equation and am only using this code above. Regards On Jan 30, 3:14 pm, Jamis Buck ja...@37signals.com wrote: 1. Define your roles in each stage file. E.g. # config/deploy/staging.rb role :app, stage-app-01, stage-app-02 # config/deploy/production.rb role :app, prod-app-01, prod-app-02 2. Put the snippet in a task. task :foo do find_servers(:roles = :app).each do |server| # ... end end 3. There is no step three! - Jamis On 1/30/09 7:51 AM, Gerhardus Geldenhuis wrote: True, But I do need multistage to deploy to different stages eg production, test, demo, load-test etc. I have also defined stages for different application stacks in production for example. eg prod-app1, prod-app2 We need to deploy our tomcat application to one server at a time in production to prevent any outages. We handle about 350 web transactions a second on a busy day in one of our environments which makes it critical that deployment is one at a time. I have been trying to modify this line to be a task find_servers(:roles = :foo).each do |server| but no success so far. It is probably due to my lack of ruby language knowledge. In the example given a specific role is given, however all my tasks defined in my cap file have no specific role attached and will thus execute for all servers defined in the config file of the stage. Regards On Jan 30, 2:23 pm, Lee Hambley lee.hamb...@gmail.com wrote: Ger, You don't need multistage to deploy to an array of servers? - Lee 2009/1/30 Gerhardus Geldenhuis gerhardus.geldenh...@gmail.com: Hi I have finally found time to start implementing this but am a bit stuck atm. I am not sure how to convert this code snippet into a working task. I also need to adapt my task to work in a multistage environment where I set my role definition in each stage's config file. Regards On Jan 28, 3:31 pm, Jamis Buck ja...@37signals.com wrote: find_servers(:roles = :foo).each do |server| run disable server on load balancer, :host = server run install new software, :host = server run test server, :host = server # etc. end - Jamis On 1/28/09 8:16 AM, Gerhardus Geldenhuis wrote: Hi I need to do something like the following: for server in role do Disable server on load balancer Install new software Test Server Enable server in load balancer If successful then deploy next server else fail/rollback. done The individual steps is not a problem but I am unsure how to approach the sequential install in a capistrano way. I could not find anything on the wiki or list archives. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: :on_error = :abort custom message
Thanks, that was my second option to create a script on the local box, however I like the clean approach of keeping all the logic on the deployment box which means I don't have to worry about any deployment requirements. Would the abbility to hide/show custom message when executing a task be something that you would consider adding to Capistrano at a later stage? If so I will gladly create a feature request for it. Regards On Jan 28, 5:33 pm, Jamis Buck ja...@37signals.com wrote: Gerhardus, there is not currently a way built into Capistrano to hide the command that is executed. My recommendation is to put the command in a script and execute the script on the server, e.g.: put some big long command to execute, /tmp/script.sh run sh -c /tmp/script.sh - Jamis On 1/28/09 10:29 AM, Gerhardus Geldenhuis wrote: Thanks Lee, That will certainly be usefull and solve some other problems I had. But I was trying to solve another problem when I execute the task I get the following: * executing for ((n=0; n61; n++ )); do\\\n if wget localhost: 8080/gta-jcbs-xml/bfuildInfo.jsp --quiet -O - --connect-timeout=1 -- timeout=1 --tries=1 | grep -q 'Build Information'; then echo 'Application Succesfully deployed';exit 0;\\\n elif [ $n -eq 60 ]; then echo \Server did not deploy in time\;\\\n exit 0;\\ \n fi;\\\n sleep 1;\\\n done servers: [longtct03g, longtct03h, longtct03i, longtct03j] regardless of the success or failure. I am trying to hide the implementation from the user because they don't need to know (or care) and just having a string that says checking for availability of application is better then the sh optimized string seen above. Basically I want a run command with the following parameters: run execute this task, optionally display this description of the task being run Regards On Jan 28, 2:09 pm, Lee Hambley lee.hamb...@gmail.com wrote: Ger, One of these two examples in my new pastie might help - though, I've not tested them :) -http://pastie.org/373172 - Lee 2009/1/28 Gerhardus Geldenhuis gerhardus.geldenh...@gmail.com Hi I believe that when I know ruby better I should be able to answer this myself but for now I would appreciate some help. Is there a way to customize the message per task when a task aborts. I would also like to customize the message if a task like the following executes: run -CMD for ((n=0; n61; n++ )); do if wget localhost:8080/gta-jcbs-xml/buildInfo.jsp --quiet -O - -- connect-timeout=1 --timeout=1 --tries=1 | grep -q 'Build Information'; then echo 'Application Succesfully deployed';exit 0; elif [ $n -eq 60 ]; then echo Server did not deploy in time; exit 0; fi; sleep 1; done CMD because the execute message looks awfull: * executing for ((n=0; n61; n++ )); do\\\n if wget localhost: 8080/gta-jcbs-xml/buildInfo.jsp --quiet -O - --connect-timeout=1 -- timeout=1 --tries=1 | grep -q 'Build Information'; then echo 'Application Succesfully deployed';exit 0;\\\n elif [ $n -eq 60 ]; then echo \Server did not deploy in time\;\\\n exit 0;\\ \n fi;\\\n sleep 1;\\\n done Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: :on_error = :abort custom message
It should really only be optional, I prefer the high verbosity during development. I don't want to confuse users who is using the deploy script and I personally like it when my screen looks nice and tidy when doing a deployment. The other option which I have anyway considered have been to eventually have all users that does application deployment use webistrano which is better for us from a security and auditing point of view too. Regards On Jan 29, 3:30 pm, Jamis Buck ja...@37signals.com wrote: Gerhardus, I don't know that I like the idea of an option that masks the command being executed, but I could probably live with a patch that changed the output depending on the verbosity of logger. When very verbose (the default), show the command in all it's glory, but when verbosity is less, show either a truncated version of the command, or just executing command. - Jamis On 1/29/09 5:33 AM, Gerhardus Geldenhuis wrote: Thanks, that was my second option to create a script on the local box, however I like the clean approach of keeping all the logic on the deployment box which means I don't have to worry about any deployment requirements. Would the abbility to hide/show custom message when executing a task be something that you would consider adding to Capistrano at a later stage? If so I will gladly create a feature request for it. Regards On Jan 28, 5:33 pm, Jamis Buck ja...@37signals.com wrote: Gerhardus, there is not currently a way built into Capistrano to hide the command that is executed. My recommendation is to put the command in a script and execute the script on the server, e.g.: put some big long command to execute, /tmp/script.sh run sh -c /tmp/script.sh - Jamis On 1/28/09 10:29 AM, Gerhardus Geldenhuis wrote: Thanks Lee, That will certainly be usefull and solve some other problems I had. But I was trying to solve another problem when I execute the task I get the following: * executing for ((n=0; n61; n++ )); do\\\n if wget localhost: 8080/gta-jcbs-xml/bfuildInfo.jsp --quiet -O - --connect-timeout=1 -- timeout=1 --tries=1 | grep -q 'Build Information'; then echo 'Application Succesfully deployed';exit 0;\\\n elif [ $n -eq 60 ]; then echo \Server did not deploy in time\;\\\n exit 0;\\ \n fi;\\\n sleep 1;\\\n done servers: [longtct03g, longtct03h, longtct03i, longtct03j] regardless of the success or failure. I am trying to hide the implementation from the user because they don't need to know (or care) and just having a string that says checking for availability of application is better then the sh optimized string seen above. Basically I want a run command with the following parameters: run execute this task, optionally display this description of the task being run Regards On Jan 28, 2:09 pm, Lee Hambley lee.hamb...@gmail.com wrote: Ger, One of these two examples in my new pastie might help - though, I've not tested them :) -http://pastie.org/373172 - Lee 2009/1/28 Gerhardus Geldenhuis gerhardus.geldenh...@gmail.com Hi I believe that when I know ruby better I should be able to answer this myself but for now I would appreciate some help. Is there a way to customize the message per task when a task aborts. I would also like to customize the message if a task like the following executes: run -CMD for ((n=0; n61; n++ )); do if wget localhost:8080/gta-jcbs-xml/buildInfo.jsp --quiet -O - -- connect-timeout=1 --timeout=1 --tries=1 | grep -q 'Build Information'; then echo 'Application Succesfully deployed';exit 0; elif [ $n -eq 60 ]; then echo Server did not deploy in time; exit 0; fi; sleep 1; done CMD because the execute message looks awfull: * executing for ((n=0; n61; n++ )); do\\\n if wget localhost: 8080/gta-jcbs-xml/buildInfo.jsp --quiet -O - --connect-timeout=1 -- timeout=1 --tries=1 | grep -q 'Build Information'; then echo 'Application Succesfully deployed';exit 0;\\\n elif [ $n -eq 60 ]; then echo \Server did not deploy in time\;\\\n exit 0;\\ \n fi;\\\n sleep 1;\\\n done Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: Editor for Capistrano
Hi Thanks for the replies, I am not yet ready to give up on vi/vim but thought it worth asking. Maybe a bigger problem for me is not the editor but the environment or lack of understanding in how to use it. I got used to pressing F9 or Ctrl+F9 to run/compile code while using Delphi and I really liked the integration and abbility to step through my code. At the moment I have a putty session for my various files I edit using tabs in vi, and a putty session running screen for the servers I deploy to using capistrano and a third putty session for executing my capistrano tasks. This works relatively well but I would welcome other suggestions for env improvements or being more effective. I find screen very usefull but it breaks some of the bash keybindings which I use often. I know I can change the keybindings but I want to stay standard to easily adapt to new environments. Regards On Jan 28, 3:36 am, Donovan Bray donno...@gmail.com wrote: Netbeans is a capable ruby editor for windows. I primarily use vi and textmate. On Jan 27, 2009, at 5:24 AM, Lee Hambley lee.hamb...@gmail.com wrote: Gerardus, Capistrano files are plain Ruby, though in Textmate on the mac you get limited support for intelligently letting you browse at task/ namespace level - but this is as much a bug as it is a feature. My advice would be to invest some time in configuring Vim for Ruby, a lot can be done with Vim if you do a little reading, and - as I said, Capistrano recipes are just pure ruby. - Lee 2009/1/27 Gerhardus Geldenhuis gerhardus.geldenh...@gmail.com Hi I am looking at Ruby editors available and was wondering if anyone has a favourite editor they want to recommend for capistrano or that can be adapted to work well with capistrano. A colleague is using Komodo which is commercial but looks quite nice. atm I am using vim which has so far been more than adequate for my needs. I do feel kind of guilty asking this as if I am letting down vim. I know vim can do a lot but I do like some prettiness and eye candy. I used to program in Delphi so vi was quite an adjustment. I am not fortunate enough to own a Apple yet (am planning to) so environments for editors is limited to Linux and windows. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: Editor for Capistrano
I forgot to mention two other things that I found extremely usefull in Delphi... that I miss in vi an easy way via keyboard shorcut to jump to the function/procedure definition and the ability to dig into the code... if I used a pre-declared function/variable/constant I could jump to the piece of code where it was declared even if it weren't part of my application which was powerfull and an excellent way to learn. Regards On Jan 28, 10:04 am, Gerhardus Geldenhuis gerhardus.geldenh...@gmail.com wrote: Hi Thanks for the replies, I am not yet ready to give up on vi/vim but thought it worth asking. Maybe a bigger problem for me is not the editor but the environment or lack of understanding in how to use it. I got used to pressing F9 or Ctrl+F9 to run/compile code while using Delphi and I really liked the integration and abbility to step through my code. At the moment I have a putty session for my various files I edit using tabs in vi, and a putty session running screen for the servers I deploy to using capistrano and a third putty session for executing my capistrano tasks. This works relatively well but I would welcome other suggestions for env improvements or being more effective. I find screen very usefull but it breaks some of the bash keybindings which I use often. I know I can change the keybindings but I want to stay standard to easily adapt to new environments. Regards On Jan 28, 3:36 am, Donovan Bray donno...@gmail.com wrote: Netbeans is a capable ruby editor for windows. I primarily use vi and textmate. On Jan 27, 2009, at 5:24 AM, Lee Hambley lee.hamb...@gmail.com wrote: Gerardus, Capistrano files are plain Ruby, though in Textmate on the mac you get limited support for intelligently letting you browse at task/ namespace level - but this is as much a bug as it is a feature. My advice would be to invest some time in configuring Vim for Ruby, a lot can be done with Vim if you do a little reading, and - as I said, Capistrano recipes are just pure ruby. - Lee 2009/1/27 Gerhardus Geldenhuis gerhardus.geldenh...@gmail.com Hi I am looking at Ruby editors available and was wondering if anyone has a favourite editor they want to recommend for capistrano or that can be adapted to work well with capistrano. A colleague is using Komodo which is commercial but looks quite nice. atm I am using vim which has so far been more than adequate for my needs. I do feel kind of guilty asking this as if I am letting down vim. I know vim can do a lot but I do like some prettiness and eye candy. I used to program in Delphi so vi was quite an adjustment. I am not fortunate enough to own a Apple yet (am planning to) so environments for editors is limited to Linux and windows. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] path problems
Hi I have created the following alias for a deployer user: alias capg='cap -f /home/deployer/tomcat-deploy/multistage/ testingmultstage.rb' however when the user runs capg he/she gets the following error: /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/capistrano/ configuration/loading.rb:183:in `find_file_in_load_path': no such file to load -- config/deploy/test_hol_esb (Loa dError) which is because the config files are not in the current directory. I can fix this with bash but I was wondering if I can rather fix this in capistrano. I was expecting capistrano to look for the config directory relevant to where the script is and not the pwd. Is there a way to fix this do it differently? Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: path problems
Thanks, I am sure it will get me own my way.
Regards
On Jan 28, 1:57 pm, Lee Hambley lee.hamb...@gmail.com wrote:
Gerhardus,
Actually, I didn't test this code, using File.join() you may need to add the
.rb to the deploy and capistrano/deploy paths... not really sure :)
- Lee
2009/1/28 Lee Hambley lee.hamb...@gmail.com
Gerhardus,
Open the Capfile and replace things like this:
load 'deploy' if respond_to?(:namespace) # cap2 differentiator
Dir['vendor/plugins/*/recipes/*.rb'].each { |plugin| load(plugin) }
Dir['capistrano/namespaces/*.rb'].each { |file| load(file) }
load 'capistrano/plan'
load 'capistrano/deploy'
With
load File.join(File.dirname(__FILE__), 'deploy') if respond_to?(:namespace)
# cap2 differentiator
Dir['vendor/plugins/*/recipes/*.rb'].each { |plugin| load(plugin) }
Dir['capistrano/namespaces/*.rb'].each { |file| load(file) }
load File.join(File.dirname(__FILE__), 'capistrano/plan')
load File.join(File.dirname(__FILE__), 'capistrano/deploy')
You won't have a plan file, that's where we define our before and Afters.
methods used are
File.joinhttp://www.ruby-doc.org/core/classes/File.html#M002568
and File.dirnamehttp://www.ruby-doc.org/core/classes/File.html#M002565
.
- Hope this helps.
2009/1/28 Gerhardus Geldenhuis gerhardus.geldenh...@gmail.com
Hi
I have created the following alias for a deployer user:
alias capg='cap -f /home/deployer/tomcat-deploy/multistage/
testingmultstage.rb'
however when the user runs capg he/she gets the following error:
/usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/capistrano/
configuration/loading.rb:183:in `find_file_in_load_path': no such file
to load -- config/deploy/test_hol_esb
(Loa dError)
which is because the config files are not in the current directory. I
can fix this with bash but I was wondering if I can rather fix this
in capistrano. I was expecting capistrano to look for the config
directory relevant to where the script is and not the pwd. Is there a
way to fix this do it differently?
Regards
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[Capistrano] Staggered Install
Hi I need to do something like the following: for server in role do Disable server on load balancer Install new software Test Server Enable server in load balancer If successful then deploy next server else fail/rollback. done The individual steps is not a problem but I am unsure how to approach the sequential install in a capistrano way. I could not find anything on the wiki or list archives. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: Staggered Install
Thanks, Another FAQ entry... There is a certain beauty to those few lines. Regards On Jan 28, 3:31 pm, Jamis Buck ja...@37signals.com wrote: find_servers(:roles = :foo).each do |server| run disable server on load balancer, :host = server run install new software, :host = server run test server, :host = server # etc. end - Jamis On 1/28/09 8:16 AM, Gerhardus Geldenhuis wrote: Hi I need to do something like the following: for server in role do Disable server on load balancer Install new software Test Server Enable server in load balancer If successful then deploy next server else fail/rollback. done The individual steps is not a problem but I am unsure how to approach the sequential install in a capistrano way. I could not find anything on the wiki or list archives. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Editor for Capistrano
Hi I am looking at Ruby editors available and was wondering if anyone has a favourite editor they want to recommend for capistrano or that can be adapted to work well with capistrano. A colleague is using Komodo which is commercial but looks quite nice. atm I am using vim which has so far been more than adequate for my needs. I do feel kind of guilty asking this as if I am letting down vim. I know vim can do a lot but I do like some prettiness and eye candy. I used to program in Delphi so vi was quite an adjustment. I am not fortunate enough to own a Apple yet (am planning to) so environments for editors is limited to Linux and windows. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Multistage in capistrano
Hi I have been doing some reading about how to implement multistaging but I am not sure which route I should be following. I would really appreciate some advice/thoughts. I have found Multistage: http://weblog.jamisbuck.org/2007/7/23/capistrano-multistage and another possible method http://www.egtheblog.com/?p= that just sets a env variable and then sets your server list based on this variable. This is the method I like most at the moment... We have demo, development, production and load testing environments. The method of deploying new applications does not differ between environment, except for the different parameters that download the applications. I also want to implement sequential implementation in production at a later stage. We have a number of different applications but all of them use the same deployment technique. I am unsure how I should be mapping this out with roles etc on my tasks, I want all roles to be able to run task A but I don't want task A to run for all roles when I don't specify the environment. I guess multistage could be used here and defining stages in the following way: Demo-AppA Demo-AppB Prod-AppA Prod-AppB etc... I like the fact that multstage will prompt you if you don't specify a environment which makes a lot safer for me. Generally applications run on a dedicated server but there will be some server sharing between applications. I would appreciate any thoughts, tips, caveats or source examples. This email is also serving as a way for me to formalize my thoughts a bit more. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Prettifying task and logging
Hi Is there a way to display a string rather than the command executed with run in a task. Some of my run commands are quite involved and does not look very intuitive or clear on the screen. I would rather show the operator a simple output with a log file somewhere else that stores all the output. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: Multistage in capistrano
Hi am reading through the archives at the moment and am missing some good examples of how to actually use multistage. I realized that I have no idea what to do further other defining my stages. Regards On Jan 23, 3:12 pm, Gerhardus Geldenhuis gerhardus.geldenh...@gmail.com wrote: Hi I have been doing some reading about how to implement multistaging but I am not sure which route I should be following. I would really appreciate some advice/thoughts. I have found Multistage:http://weblog.jamisbuck.org/2007/7/23/capistrano-multistage and another possible methodhttp://www.egtheblog.com/?p=that just sets a env variable and then sets your server list based on this variable. This is the method I like most at the moment... We have demo, development, production and load testing environments. The method of deploying new applications does not differ between environment, except for the different parameters that download the applications. I also want to implement sequential implementation in production at a later stage. We have a number of different applications but all of them use the same deployment technique. I am unsure how I should be mapping this out with roles etc on my tasks, I want all roles to be able to run task A but I don't want task A to run for all roles when I don't specify the environment. I guess multistage could be used here and defining stages in the following way: Demo-AppA Demo-AppB Prod-AppA Prod-AppB etc... I like the fact that multstage will prompt you if you don't specify a environment which makes a lot safer for me. Generally applications run on a dedicated server but there will be some server sharing between applications. I would appreciate any thoughts, tips, caveats or source examples. This email is also serving as a way for me to formalize my thoughts a bit more. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: Multistage in capistrano
Hi Lee, To be perfectly frank not very far. I don't know how to incorporate multistage in my application. Unless the stages you define correspond to roles defined and the the task gets executed automatically against that role. Regards On Jan 23, 4:32 pm, Lee Hambley lee.hamb...@gmail.com wrote: Hi Gerhardus, Where are you upto so far? - Lee 2009/1/23 Gerhardus Geldenhuis gerhardus.geldenh...@gmail.com Hi am reading through the archives at the moment and am missing some good examples of how to actually use multistage. I realized that I have no idea what to do further other defining my stages. Regards On Jan 23, 3:12 pm, Gerhardus Geldenhuis gerhardus.geldenh...@gmail.com wrote: Hi I have been doing some reading about how to implement multistaging but I am not sure which route I should be following. I would really appreciate some advice/thoughts. I have found Multistage: http://weblog.jamisbuck.org/2007/7/23/capistrano-multistage and another possible methodhttp://www.egtheblog.com/?p=thatjust sets a env variable and then sets your server list based on this variable. This is the method I like most at the moment... We have demo, development, production and load testing environments. The method of deploying new applications does not differ between environment, except for the different parameters that download the applications. I also want to implement sequential implementation in production at a later stage. We have a number of different applications but all of them use the same deployment technique. I am unsure how I should be mapping this out with roles etc on my tasks, I want all roles to be able to run task A but I don't want task A to run for all roles when I don't specify the environment. I guess multistage could be used here and defining stages in the following way: Demo-AppA Demo-AppB Prod-AppA Prod-AppB etc... I like the fact that multstage will prompt you if you don't specify a environment which makes a lot safer for me. Generally applications run on a dedicated server but there will be some server sharing between applications. I would appreciate any thoughts, tips, caveats or source examples. This email is also serving as a way for me to formalize my thoughts a bit more. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: exit status and task success
Hi
Thanks for all the answers.
What I was unclear about is the relationship between the unix command
line exit status and the success status of the task. It now seems
clear that if the the command succeeds the task succeeds and vice
versa.
This leads me on to another question. Should you generally encapsulate
only one external command in a capistrano task, or can I have an if
statement in my task that acts on the success/failure(true/false) of
the command line. I will illustrate by a simple example.
if run dosomething then do task1
else first do task 2
and to clarify what I meant in my previous email I would also like to
do the following:
task
result = (run command)
if result = 'a piece of string' then fail task immediatly to trigger
rollback
end
Regards
On Jan 21, 6:07 pm, Jamis Buck ja...@37signals.com wrote:
What Rafael said, except if you're rescuing the exception you should be
able to leave off the :on_error = :continue bit.
Also, to force a task to succeed or fail...I assume you mean run()? Or
do you really mean task()?
To force a run command to succeed, just append ; true to the end of
the command:
run something that might fail; true
Likewise, to make it fail, just append ; false to the end:
run something that must fail; false
(That's not Capistrano magic, that's *nix. Most (all?) unices come with
'true' and 'false' commands. The 'true' command does nothing except exit
with a status code of 0. The 'false' command does nothing except exit
with a status code of 1.)
- Jamis
On 1/21/09 10:42 AM, Rafael G. wrote:
Gerhardus Geldenhuis wrote:
Hi
Is there a way to run different tasks based on the exit status of a
run command? Also how can I force a task to fail or succeed, how is
the failure/success of a task determined/defined.
Regards
You can write a task with :on_error set to :continue and then catch the
exception, I never done it, the idea is:
task :foo, :on_error = :continue do
begin
run important task
rescue Exception = error
puts Important task fail!!: #{error}
foo.task_if_foo_fail
end
end
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[Capistrano] Capistrano vs Puppet
Hi vs might be a bit of a controversial term. I am really interested in peoples opinions about the overlapping or symbiotic relationship between capistrano and puppet. If you are using both tools, could you expand on the relationship between the tools in your usage of them? I have some thoughts on the subject but have on purpose not shared the immediately as I feel that would be a leading question. :-) Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] RFC on script
Hi I have written the following script to monitor succesfull startup of our webapp: I am trying every second to get a webpage but also have a timeout which will fail the task after 60 seconds. task :monitor_app_startup, :roles = :testct do run -CMD for ((n=0; n61; n++ )); do if wget localhost:8080/gta/buildInfo.jsp --quiet -O - --connect- timeout=1 --timeout=1 --tries=1 | grep -q Build Information; then exit 0 elif [ $n -eq 60 ]; then exit 1; fi; sleep 1; done CMD end I would appreciate any feedback or suggestions to improve this or do it differently. Also if the task fails the error message looks something like this: failed: sh -c \for ((n=0; n61; n++ )); do\n if wget localhost:8080/gta/buildInfo.jsp --quiet -O - --connect-timeout=1 -- timeout=1 --tries=1 | grep -q \\\Build rrInformation\\\; then exit 0;\n elif [ \\$n -eq 5 ]; then exit 1;\n fi; \n sleep 1;\ndone\ on longtct03g [ which is very ugly. Is there a way to override the failure message for a task? Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: RFC on script
Thanks, I will need to look into wget's retry logic and all the relevant parameters. It will certainly make things a lot cleaner. I don't understand why you suggest not to fail with exit 1. The task has failed. The plan is that I want to later on implement rollback logic and then I need the task to fail to trigger the rollback logic. I am also unsure about where you meant me to put the [puts fail] statement. Surely it must be in a if statement of some sorts otherwise it would just print fail regardless of whether it worked or not. Regards On Jan 22, 3:30 pm, Mike Bailey m...@bailey.net.au wrote: Always exit with 0. Errors are ugly. Just puts 'fail' instead. You can put the retry logic into the wget command. - Mike maculike2:~ mbailey$ if wget --tries=1 --wait=1 --connect-timeout=1 --timeout=1 --quiethttp://localhost:8080/;then echo 'success'; else echo 'fail'; fi; fail maculike2:~ mbailey$ if wget --tries=1 --wait=1 --connect-timeout=1 --timeout=1 --quiethttp://www.google.com/;then echo 'success'; else echo 'fail'; fi; success On Fri, Jan 23, 2009 at 2:13 AM, Gerhardus Geldenhuis gerhardus.geldenh...@gmail.com wrote: Hi I have written the following script to monitor succesfull startup of our webapp: I am trying every second to get a webpage but also have a timeout which will fail the task after 60 seconds. task :monitor_app_startup, :roles = :testct do run -CMD for ((n=0; n61; n++ )); do if wget localhost:8080/gta/buildInfo.jsp --quiet -O - --connect- timeout=1 --timeout=1 --tries=1 | grep -q Build Information; then exit 0 elif [ $n -eq 60 ]; then exit 1; fi; sleep 1; done CMD end I would appreciate any feedback or suggestions to improve this or do it differently. Also if the task fails the error message looks something like this: failed: sh -c \for ((n=0; n61; n++ )); do\n if wget localhost:8080/gta/buildInfo.jsp --quiet -O - --connect-timeout=1 -- timeout=1 --tries=1 | grep -q \\\Build rrInformation\\\; then exit 0;\n elif [ \\$n -eq 5 ]; then exit 1;\n fi; \n sleep 1;\n done\ on longtct03g [ which is very ugly. Is there a way to override the failure message for a task? Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: RFC on script
Thanks, I need to configure wget that it does not try 60 times in one second but that is just some man page reading. My confusions were that I was assuming that capistrano would handle exit 1 statements and not fail completely. Regards On Jan 22, 3:56 pm, Mike Bailey m...@bailey.net.au wrote: For 60 retries use: if wget --tries=60 --wait=1 --connect-timeout=1 --timeout=1 --quiethttp://localhost:8080/;then echo 'success'; else echo 'fail'; fi; exit 0 I don't understand why you suggest not to fail with exit 1. The task has failed. The plan is that I want to later on implement rollback logic and then I need the task to fail to trigger the rollback logic. exiting on anything but 0 halts capistrano. I am also unsure about where you meant me to put the [puts fail] statement. Surely it must be in a if statement of some sorts otherwise it would just print fail regardless of whether it worked or not. Sorry, I'm a bit sleepy. The shell command above is echoing success or fail. - Mike --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: exit status and task success
On Jan 22, 4:08 pm, Jamis Buck ja...@37signals.com wrote: The run() command does not return success/failure. If it succeeds, it returns. If it fails, it raises an exception. To get the result of a command, you can use the capture() method: http://wiki.capify.org/article/Capture Note, though, that it runs the command only on a single host, so if you want the output of multiple hosts, you'll need to use run() and give it a block, so you can process the output yourself: http://wiki.capify.org/article/Run To answer your question about one-command-per-task, you can definitely put as many commands in as you want. As for conditionally running commands, you can do that in a few ways. First, if you have really complex conditional logic, it might be best to put the entire task in a shell and run the script from capistrano, a la: task :do_something_hard do run my_script end I am in two minds about this. I want as little as possible scripts on my servers. I believe that all/most logic should sit on management server. This also makes building new boxes more simple. On the other hand one can just just capistrano to distribute the scripts or whichever other tool. And my_script could either be shell script, or ruby, whichever floats your boat. Alternatively, for simpler needs, you can use shell if conditions directly in capistrano: run if [ some_command ]; then other_command; else last_command; fi However, it's really not feasible to test the run() command itself (via exception rescuing, etc.) because just because the command fails on one server, doesn't mean it failed on all servers. Consider: begin run something that might fail rescue Exception run something assuming the first failed end If you run this task against more than one server, then it could be that one server fails while the others succeed. In that event, an exception would still be raised, resulting in the second run() being executed against ALL SERVERS, not just the one(s) that failed. Hope that makes sense, It does now. :-) One needs to remember that a task executed against a group of servers will be considered a single entity eg I create a directory on my test servers. if one fails then the task evaluate false in a true statement, but if you have exception handling then the individual server would still be taking care off. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: How to deploy to a single specific server using Capistrano
That is brilliant clear, thanks. Basically defining a task with a role safeguards you against using the task on a server where it would'nt make any sense. I have been thinking of tasks as a bit more abstract. For me copy files to a apache server is a generic task but specific to webservers. However my server list is not static and might change 3 times a day and I have found it strange to include my server lists as part of my capistrano program. I guess you can import an external file that contains a list of servers and dynamically build your role members. It boils down to how you use capistrano. Regards On Jan 22, 4:14 pm, Jamis Buck ja...@37signals.com wrote: On 1/22/09 4:12 AM, Gerhardus Geldenhuis wrote: I have found this very usefull, however I do not understand the difference between HOSTS and HOSTFILTER. It would be great if you could explain it from another angle I'll give it another try. Consider this concrete example. Suppose your script defines three servers, A, B, and C. And it defines a task, foo, that (by default) wants to run on A and B, but not C. Like this: role :app, A, B role :web, C task :foo, :roles = :app do run echo hello end Now, if you do cap foo, it will run the echo command on both A and B. If you do cap HOSTS=C foo, it will run the echo command on C, regardless of the :roles parameter to the task. If you do cap HOSTFILTER=C foo, it will not run the echo command at all, because the intersection of (A B) and (C) is an empty set. (There are no hosts in foo's host list that match C.) If you do cap HOSTFILTER=A foo, it will run the echo command on only A, because (A B) intersected with (A) is (A). Lastly, if you do cap HOSTFILTER=A,B,C foo, it will run the echo command on A and B (but not C), because (A B) intersected with (A B C) is (A B). To summarize: HOSTS completely overrides the hosts or roles declaration of the task, and forces everything to run against the specified host(s). The HOSTFILTER, on the other hand, simply filters the existing hosts against the given list, choosing only those servers that are already in the tasks server list. Hope that's clearer, Jamis Regards On Jan 21, 5:03 pm, Jamis Buck ja...@37signals.com wrote: Try the HOSTS environment variable: cap HOSTS=app2.example.com production deploy Note that doing this will treat app2 as being in every role, not just whichever role(s) it happens to be declared in. If what you want is to do a regular deploy, but only act on app2, and only as app2 is declared in your recipe file, you can use the HOSTFILTER variable instead: cap HOSTFILTER=app2.example.com production deploy Sorry if the distinction isn't clear there. Let me know if you need more clarification as to the difference between HOSTS and HOSTFILTER. - Jamis On 1/21/09 9:54 AM, Pete Hodgson wrote: Hi Folks, I have a system in production that has several servers in serveral roles. I would like to test a new app server by deploying to that specific server, without having to redeploy to every server in production. Is there a way to ask Capistrano to deploy to a specific server? Ideally I'd like to be able to run something like cap SERVER=app2.example.com ROLE=app production deploy if I just wanted to deploy to app2.example.com. I original posted this question on Stack Overflow a few days back [1] and got a few answers, but neither solution seemed to work for me. Hope it's not bad form to now post here. Cheers, Pete [1]http://stackoverflow.com/questions/429816/how-to-deploy-to-a-single-s... --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: RFC on script
Hi This is not really capistrano related anymore but I thought it worthwhile to mention for anyone following the thread. I have tried a number of wget flags: wget longtct03g:8080/gta/buildInfo.jsp -O - --connect-timeout=1 -- timeout=1 --tries=60 --wait=1 --waitretry=10 --retry-connrefused Resolving longtct03g... 10.200.31.17 Connecting to longtct03g|10.200.31.17|:8080... connected. HTTP request sent, awaiting response... 400 Bad Request 17:20:40 ERROR 400: Bad Request. However because the tomcat application is not available you will get a Bad Request on which wget will fail immediatly. I thus still need to encapsulate the wget in my own loop. I would have loved to simplify my script but the external loop is still needed. Regards On Jan 22, 3:56 pm, Mike Bailey m...@bailey.net.au wrote: For 60 retries use: if wget --tries=60 --wait=1 --connect-timeout=1 --timeout=1 --quiethttp://localhost:8080/;then echo 'success'; else echo 'fail'; fi; exit 0 I don't understand why you suggest not to fail with exit 1. The task has failed. The plan is that I want to later on implement rollback logic and then I need the task to fail to trigger the rollback logic. exiting on anything but 0 halts capistrano. I am also unsure about where you meant me to put the [puts fail] statement. Surely it must be in a if statement of some sorts otherwise it would just print fail regardless of whether it worked or not. Sorry, I'm a bit sleepy. The shell command above is echoing success or fail. - Mike --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] role/host variable
Hi
Is there a variable that I can access to get the name of each server
in the role?
I want to do something like the following:
task :idfile, :roles = :testtct do
run touch /tmp/#{testtct.name}
end
Regards
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[Capistrano] exit status and task success
Hi Is there a way to run different tasks based on the exit status of a run command? Also how can I force a task to fail or succeed, how is the failure/success of a task determined/defined. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] CLI.ui.ask does not prompt
Hi
I can't get the following code snippet to work.
task :promptme, :roles = :gg do
set(:user) { Capistrano::CLI.ui.ask(User name: ) }
end
I expected it to prompt me on the command line when running cap
promptme but it does not prompt me at all.
cap promptme
* executing `promptme'
When running the command it just exits immediately.
Any ideas?
Best Regards
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[Capistrano] problem with cat /etc/passwd do |ch, stream, data|
Hi
I saw the following code on
http://blog.innerewut.de/2007/9/28/capturing-output-in-capistrano
and thought it was capistrano
run cat /etc/passwd do |ch, stream, data|
if stream == :err
logger.debug capured output on STDERR: #{data}
else # stream == :out
logger.debug capured output on STDOUT: #{data}
end
end
but I get a syntax error when trying to run it as a task.
capfile:53:in `load': compile error (SyntaxError)
capfile:53: syntax errorfrom /usr/lib/ruby/gems/1.8/gems/
capistrano-2.5.3/lib/capistrano/configuration/loading.rb:172:in
`load_from_file'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/loading.rb:89:in `load'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/loading.rb:86:in `load'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/loading.rb:86:in `each'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/configuration/loading.rb:86:in `load'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:64:in `load_recipes'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:64:in `each'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:64:in `load_recipes'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:30:in `execute!'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/lib/
capistrano/cli/execute.rb:14:in `execute'
from /usr/lib/ruby/gems/1.8/gems/capistrano-2.5.3/bin/cap:4
from /usr/bin/cap:16:in `load'
from /usr/bin/cap:16
Is this ruby code I am trying to run or is there something I am doing
wrong?
Regards
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[Capistrano] Waiting for tasks and tailing files
Hi I am writing a task that undeploys our application in tomcat. Normally if we do it by hand we remove the war file and then watch the tomcat webapp directory for the automatic deletion of the application directory. I would appreciate advice on the best way to achieve something similar like this in capistrano. We have a bunch of bash scripts but I don't want to distribute bash scripts around if I can do it in caps. We also tail -f the tomcat log and check for a certain string. Any suggestions to achieve something similar in capistrano. I also want to achieve something like the following: if directory successfully deleted or 60 seconds pass then do something. Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] is if cpu x part of capistrano
Hi I have emailed this from my gmail account earlier but did not see the message appear on the group. Apologies if it is double posted. I have been going through same of the example scripts on the mailing list page and came acrross this. Its just an extract from: http://groups.google.com/group/capistrano/web/useful-recipies---monit Monit scripts ferret.monitrc: check process ferret with pidfile /www/application/current/log/ ferret.pid start program = /bin/su -c 'cd /www/application/current/ RAILS_ENV=development FERRET_USE_LOCAL_INDEX=1 script/ferret_start' nobody stop program = /bin/su -c 'cd /www/application/current/ RAILS_ENV=development FERRET_USE_LOCAL_INDEX=1 script/ferret_stop' nobody # cpu usage boundaries if cpu 60% for 2 cycles then alert if cpu 90% for 5 cycles then restart It looks VERY cool but being new to capistrano I am not sure whether this is part of capistrano. The bits that interested me was the cpu if statement. Could someone confirm whether this is capistrano and if so explain the definition of cycles in this context. Many Regards --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
[Capistrano] Re: is if cpu x part of capistrano
Thanks, do you have a url that you could point me to? I am having difficulty finding it on google. The name is a bit generic. Regards On Thu, Jan 8, 2009 at 2:43 PM, Jonathan Weiss j...@innerewut.de wrote: # cpu usage boundaries if cpu 60% for 2 cycles then alert if cpu 90% for 5 cycles then restart It looks VERY cool but being new to capistrano I am not sure whether this is part of capistrano. The bits that interested me was the cpu if statement. Could someone confirm whether this is capistrano and if so explain the definition of cycles in this context. This is not part of Capistrano but is a Monit configuration file. Monit is a process level monitoring tool that can react to resource consumption. Jonathan -- Jonathan Weiss http://blog.innerewut.de http://twitter.com/jweiss -- Gerhardus Geldenhuis Registered Linux User #193352 --~--~-~--~~~---~--~~ To unsubscribe from this group, send email to capistrano-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/capistrano -~--~~~~--~~--~--~---
