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Re: Conditional services

From: Martin Pala
Subject: Re: Conditional services
Date: Thu, 4 Feb 2016 14:54:53 +0100


you can use "mode manual" for services, which will be started only on request 
(can be automated):

# active/passive services cluster
check device hafs with path /dev/sdb1
    start program  = "/etc/ha.d/resource.d/ha-fs start"
    stop program  = "/etc/ha.d/resource.d/ha-fs stop"
    if space usage > 80% then alert
    mode  manual
    group ha

check process postgresql with pidfile /var/run/
    start program = "/etc/init.d/postgresql start"
    stop program  = "/etc/init.d/postgresql stop"
    depends hafs
    mode  manual
    group ha

you can then enable the monitoring using "monit -g ha monitor all"  and disable 
it using "monit -g ha unmonitor all"


> On 04 Feb 2016, at 12:52, Vadym Chepkov <address@hidden> wrote:
> Hi,
> Can somebody give an advice how to implement active/standby configuration 
> using monit.
> There are some services which can't run from multiple locations for various 
> reasons. To solve this problem, we have a script, which can be used to check 
> if current location is active or standby via exit code. cron wrapper uses it 
> to determine if cron job should run or not, for instance.
> But how does one tell monit to start/monitor  services if server becomes 
> active and stop, make sure they are not running if server is in standby mode.
> This should be applied only to 'volatile' services, not all of them.
> Thank you.
> Cheers,
> Vadym
> --
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