[ClusterLabs] [Q] Check on application layer (kamailio, openhab)

[Dejan Muhamedagic]

Hi,

On Mon, Dec 21, 2015 at 10:07:25AM -0600, Ken Gaillot wrote:
> On 12/19/2015 10:21 AM, Sebish wrote:
> > Dear all ha-list members,
> > 
> > I am trying to setup two availability checks on application layer using
> > heartbeat and pacemaker.
> > To be more concrete I need 1 resource agent (ra) for openHAB and 1 for
> > Kamailio SIP Proxy.
> > 
> > *My setup:
> > *
> > 
> >    + Debian 7.9 + Heartbeat + Pacemaker + more
> 
> This should work for your purposes, but FYI, corosync 2 is the preferred
> communications layer these days. Debian 7 provides corosync 1, which
> might be worth using here, to make an eventual switch to corosync 2 easier.
> 
> Also FYI, Pacemaker was dropped from Debian 8, but there is a group
> working on backporting the latest pacemaker/corosync/etc. to it.
> 
> >    + 2 Node Cluster with Hot-Standby Failover
> >    + Active Cluster with clusterip, ip-monitoring, working failover and
> >    services
> >    + Copied kamailio ra into /usr/lib/ocf/resource.d/heartbeat, chmod
> >    755 and 'crm ra list ocf heartbeat' finds it
> > 
> > *The plan:*
> > 
> > _openHAB_
> > 
> >    My idea was to let heartbeat check for the availabilty of openHAB's
> >    website (jettybased) or check if the the process is up and running.
> > 
> >    I did not find a fitting resource agent. Is there a general ra in
> >    which you would just have to insert the process name 'openhab'?
> > 
> > _Kamailio_
> > 
> >    My idea was to let an ra send a SIP-request to kamailio and check,
> >    if it gets an answer AND if it is the correct one.
> > 
> >    It seems like the ra
> >   
> > https://github.com/ClusterLabs/resource-agents/blob/master/heartbeat/kamailio
> > 
> >    does exactly what I want,
> >    but I do not really understand it. Is it plug and play? Do I have to
> >    change values inside the code like users, the complete meta-data or
> >    else?
> > 
> >    When I try to insert this agent (no changes) into pacemaker using
> >    'crm configure primitive kamailio ocf:heartbeat:kamailio' it says:
> > 
> >        lrmadmin[4629]: 2015/12/19_16:11:40 ERROR:
> >        lrm_get_rsc_type_metadata(578): got a return code HA_FAIL from a
> >        reply message of rmetadata with function get_ret_from_msg.
> >        ERROR: ocf:heartbeat:kamailio: could not parse meta-data:
> >        ERROR: ocf:heartbeat:kamailio: could not parse meta-data:
> >        ERROR: ocf:heartbeat:kamailio: no such resource agent
> 
> lrmadmin is no longer used, and I'm not familiar with it, but first I'd
> check that the RA is executable. If it supports running directly from
> the command line, maybe make sure you can run it that way first.

I think that the RA is just not installed.

Thanks,

Dejan

> Most RAs support configuration options, which you can set in the cluster
> configuration (you don't have to edit the RA). Each RA specifies the
> options it accepts in the <parameters> section of its metadata.
> 
> > *The question:*_
> > 
> > _Maybe you could give me some hints on what to do next. Perhaps one of
> > you is even already using the kamailio ra successfully or checking a
> > non-apache website?
> > If I simply have to insert all my cluster data into the kamailio ra, it
> > should not throw this error, should it? Could have used a readme for
> > this ra though...
> > If you need any data, I will provide it asap!
> > 
> > *
> > **Thanks a lot to all who read this mail!*
> > 
> > Sebish
> > ha-newbie, but not noobie ;)
> 
> 
> _______________________________________________
> Users mailing list: Users at clusterlabs.org
> http://clusterlabs.org/mailman/listinfo/users
> 
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org