Henry-
That is what it quoted earlier in this email. Here is the monitrc
for one mongrel using mongrel_cluster:
check process mongrel_USERNAME_5000
with pidfile /data/USERNAME/shared/log/mongrel.5000.pid
start program = "/usr/bin/mongrel_rails cluster::start -C /data/
USERNAME/current/config/mongrel_cluster.yml --clean --only 5000"
stop program = "/usr/bin/mongrel_rails cluster::stop -C /data/
USERNAME/current/config/mongrel_cluster.yml --only 5000"
if totalmem is greater than 110.0 MB for 4 cycles then
restart # eating up memory?
if cpu is greater than 50% for 2 cycles then
alert # send an email to admin
if cpu is greater than 80% for 3 cycles then
restart # hung process?
if loadavg(5min) greater than 10 for 8 cycles then
restart # bad, bad, bad
if 20 restarts within 20 cycles then
timeout # something is wrong, call the sys-admin
group mongrel
You need one of those entries for each mongrel you need to run.
Cheers-
-Ezra
On Apr 7, 2007, at 7:54 AM, Henry wrote:
> Ezra,
>
> Would you mind sharing the portion of your monit.conf that handles
> the cluster?
>
> Many thanks,
> Henry
>
>
> On Apr 3, 2007, at 6:28 PM, Ezra Zygmuntowicz wrote:
>
>>
>> Yes mongrel_cluster handles the pid files. Also it does a better job
>> of stopping mongrels. The problem I had when I used monit and
>> mongrel_rails without mongrel_cluster was that if a mongrel used too
>> much memory monit woudl not be able to stop it sometimes and so
>> execution woudl fail and timeout.
>>
>> Using mongrel_clutser avoids this problem completely. Trust me I've
>> tried it all different ways. I did monit without mongrel_cluster for
>> a about a full month on close to 200 servers and then switched them
>> all to monit and mongrel_cluster and get much better results.
>>
>> -Ezra
>>
>> On Apr 3, 2007, at 3:00 PM, snacktime wrote:
>>
>>> Makes sense that mongrel_cluster would handle a lot of edge cases
>>> better then monit. Is it mainly the pid file handling that has been
>>> the main issue so far?
>>>
>>> Have you tried daemontools? Seems to me like it would be more
>>> reliable since you wouldn't have to deal with pid files and
>>> backgrounding mongrel.
>>>
>>> Chris
>>>
>>> On 4/3/07, Ezra Zygmuntowicz <[EMAIL PROTECTED]> wrote:
>>>>
>>>> On Apr 3, 2007, at 1:39 PM, snacktime wrote:
>>>>
>>>>> Is there anything mongrel cluster gives you that monit doesn't?
>>>>> I'll
>>>>> be using monit to monitor a number of other services anyways,
>>>>> so it
>>>>> seems logical to just use it for everything including mongrel.
>>>>>
>>>>> Chris
>>>>>
>>>>
>>>> Chris-
>>>>
>>>> WHen you use monit you can still use mongrel_cluster to
>>>> manage it.
>>>> You need the latest pre release of mongrel_cluster. This is the
>>>> best
>>>> configuration I've been able to come up with for 64Bit systems. If
>>>> your on 32bit system then you can lower the memory limits by about
>>>> 20-30%
>>>>
>>>> check process mongrel_<%= @username %>_5000
>>>> with pidfile /data/<%= @username %>/shared/log/mongrel.5000.pid
>>>> start program = "/usr/bin/mongrel_rails cluster::start -C /
>>>> data/<%
>>>> = @username %>/current/config/mongrel_cluster.yml --clean --only
>>>> 5000"
>>>> stop program = "/usr/bin/mongrel_rails cluster::stop -C /data/
>>>> <%=
>>>> @username %>/current/config/mongrel_cluster.yml --clean --only
>>>> 5000"
>>>> if totalmem is greater than 110.0 MB for 4 cycles then
>>>> restart # eating up memory?
>>>> if cpu is greater than 50% for 2 cycles then
>>>> alert # send an email to admin
>>>> if cpu is greater than 80% for 3 cycles then
>>>> restart # hung process?
>>>> if loadavg(5min) greater than 10 for 8 cycles then
>>>> restart # bad, bad, bad
>>>> if 20 restarts within 20 cycles then
>>>> timeout # something is wrong, call the sys-
>>>> admin
>>>> group mongrel
>>>>
>>>> check process mongrel_<%= @username %>_5001
>>>> with pidfile /data/<%= @username %>/shared/log/mongrel.5001.pid
>>>> start program = "/usr/bin/mongrel_rails cluster::start -C /
>>>> data/<%
>>>> = @username %>/current/config/mongrel_cluster.yml --clean --only
>>>> 5001"
>>>> stop program = "/usr/bin/mongrel_rails cluster::stop -C /data/
>>>> <%=
>>>> @username %>/current/config/mongrel_cluster.yml --clean --only
>>>> 5001"
>>>> if totalmem is greater than 110.0 MB for 4 cycles then
>>>> restart # eating up memory?
>>>> if cpu is greater than 50% for 2 cycles then
>>>> alert # send an email to admin
>>>> if cpu is greater than 80% for 3 cycles then
>>>> restart # hung process?
>>>> if loadavg(5min) greater than 10 for 8 cycles then
>>>> restart # bad, bad, bad
>>>> if 20 restarts within 20 cycles then
>>>> timeout # something is wrong, call the sys-
>>>> admin
>>>> group mongrel
>>>>
>>>> check process mongrel_<%= @username %>_5002
>>>> with pidfile /data/<%= @username %>/shared/log/mongrel.5002.pid
>>>> start program = "/usr/bin/mongrel_rails cluster::start -C /
>>>> data/<%
>>>> = @username %>/current/config/mongrel_cluster.yml --clean --only
>>>> 5002"
>>>> stop program = "/usr/bin/mongrel_rails cluster::stop -C /data/
>>>> <%=
>>>> @username %>/current/config/mongrel_cluster.yml --clean --only
>>>> 5002"
>>>> if totalmem is greater than 110.0 MB for 4 cycles then
>>>> restart # eating up memory?
>>>> if cpu is greater than 50% for 2 cycles then
>>>> alert # send an email to admin
>>>> if cpu is greater than 80% for 3 cycles then
>>>> restart # hung process?
>>>> if loadavg(5min) greater than 10 for 8 cycles then
>>>> restart # bad, bad, bad
>>>> if 20 restarts within 20 cycles then
>>>> timeout # something is wrong, call the sys-
>>>> admin
>>>> group mongrel
>>>>
>>>>
>>>> I wen't for a while using my own scripts to start and stop
>>>> mongrel
>>>> without using mongrel_cluster. But it works more reliably when I
>>>> use
>>>> mongrel_cluster and monit together.
>>>>
>>>> Cheers-
>>>> -- Ezra Zygmuntowicz
>>>> -- Lead Rails Evangelist
>>>> -- [EMAIL PROTECTED]
>>>> -- Engine Yard, Serious Rails Hosting
>>>> -- (866) 518-YARD (9273)
>>>>
>>>>
>>>> _______________________________________________
>>>> Mongrel-users mailing list
>>>> [email protected]
>>>> http://rubyforge.org/mailman/listinfo/mongrel-users
>>>>
>>> _______________________________________________
>>> Mongrel-users mailing list
>>> [email protected]
>>> http://rubyforge.org/mailman/listinfo/mongrel-users
>>>
>>
>> -- Ezra Zygmuntowicz
>> -- Lead Rails Evangelist
>> -- [EMAIL PROTECTED]
>> -- Engine Yard, Serious Rails Hosting
>> -- (866) 518-YARD (9273)
>>
>>
>> _______________________________________________
>> Mongrel-users mailing list
>> [email protected]
>> http://rubyforge.org/mailman/listinfo/mongrel-users
>
> _______________________________________________
> Mongrel-users mailing list
> [email protected]
> http://rubyforge.org/mailman/listinfo/mongrel-users
>
-- Ezra Zygmuntowicz
-- Lead Rails Evangelist
-- [EMAIL PROTECTED]
-- Engine Yard, Serious Rails Hosting
-- (866) 518-YARD (9273)
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