Yes, it did solve the issue, THANK YOU!! :)
---
unai
On 2013-04-08 00:39, Baptiste wrote:
Hi,
I'm glad I was able to help you.
If it solved your issue, please answer back with the ML in Cc.
so google will archive it and everybody can use this tip as well.
Baptiste.
On Mon, Apr 8, 2013 at 7:32 AM, Unai Rodriguez <[email protected]>
wrote:
Thank you Baptiste!!
---
unai
On 2013-04-02 00:55, Baptiste wrote:
Hi,
You can either use the disable-on-404 health checking option or using
HAProxy socket to disable servers temporarly (I mean temporarly
because the
UNIX socket applies changes in running HAProxy process, not in its
startup
configuration file).
You could then have a few simple acl matching the number of available
servers in a farm (this also may mean you must have a backend by
application).
use_backend maintenance_page if is_app1 nb_srv(bk_app1) eq 0
use_backend bk_app1 if is_app1
now, just create a bash script to loop through the HAProxy unix stat
socket
to disable the servers:
echo "disable server bk_app1/srv1" | socat /var/run/haproxy.socket -
Baptiste
On Tue, Apr 2, 2013 at 8:42 AM, Unai Rodriguez <[email protected]>
wrote:
Dear List,
We have a number of applications behind HAProxy. Sometimes we need
to put
one of the applications in maintenance mode (i.e. display a "This
page is
under maintenance banner"). We achieve that with the following
rules:
acl is_app1 hdr(host) app1.example.com
acl is_app2 hdr(host) app2.example.com
acl is_app3 hdr(host) app3.example.com
acl is_app4 hdr(host) app4.example.com
acl is_app5 hdr(host) app5.example.com
acl is_app6 hdr(host) app6.example.com
acl is_app7 hdr(host) app7.example.com
acl is_app8 hdr(host) app8.example.com
acl is_app9 hdr(host) app9.example.com
acl is_app0 hdr(host) app0.example.com
use_backend maintenance_page if is_app1
#use_backend maintenance_page if is_app2
#use_backend maintenance_page if is_app3
#use_backend maintenance_page if is_app4
#use_backend maintenance_page if is_app5
#use_backend maintenance_page if is_app6
#use_backend maintenance_page if is_app7
#use_backend maintenance_page if is_app8
#use_backend maintenance_page if is_app9
#use_backend maintenance_page if is_app0
Currently what we do is comment/uncomment lines manually and reload
HAProxy when wanting to put app1, app2, app3... under maintenance.
This is somewhat error prone and we are looking for a way of doing
this in
a more sophisticated manner. Ideally someone should be able to login
on a
simple web page, click a button and enable/disable applications as
needed.
We used to do that in the past by having several HAProxy
configurations
but now this would mean to have 100 config files to cover all
different
posibilities.
What ACLs can be used so that HAProxy does NOT need to be reloaded?
We
haven't been able to find matching criteria that depends on the
existance of
a file locally for example (or some other environment variable). I
guess we
could serve HTTP 200 or HTTP 503 for example (to put appX on/off)
but is
there a more elegant/better way?
Thank you so much
--
unai
