[Linux-HA] Monitoring resources (apache)

[Andrew Beekhof]

On 3/13/07, Joseph Andres <jbandres at gmail.com> wrote:
>  Hi All,
>
> I'm very new to Linux  HA, nevertheless have managed to install a 2 node
> cluster in my test environment. My test environment is:
>
> 1 x Laptop running CentOS 4.4 (kernel 2.6.19.1)
> 1 x Laptop Windows XP plus VMWare running CentOS 4.4 (kernel 2.6.19.1)
> Heartbeat v 2.0.8
>
> I have installed HB using RPM from CentOS repository.
>
> The cluster works fine, the failover is successful in the following
> simulated scenarios:
>
> - node crash, i.e. poweroff or shutdown a node
> - making one node standby
> - stopping HB in one node
>
> The next level I'm trying to achieve is to monitor resources. However, this
> is where I got stuck. I have only two resources now, IPaddr and apache. I'm
> trying to monitor apache with the attached configuration in my
> cib.xml(output of cibadmin -Ql command). I simpIy want to failover to
> the other
> node, i.e. migrate all resources, if apache has stopped for some reasons (
> e.g. service httpd stop). I tried to follow the examples in
> http://www.linux-ha.org/ClusterInformationBase/Actions.
>
> With my current configurations, however, my two nodes just going in loop
> failing over (bouncing) and seems like never able to start apache properly,
> or may be the monitor itself is failing does causing the loop.

start failures never result in resources bouncing around the cluster.
the most likely reason is that the monitor action is failing for some reason...
based on the return code "6", its trying to tell you its badly configured.

i would look in the RA and see why it would be returning that.

i also doubt you want to shoot a node because an apache monitor failed.

> It's really
> "interesting" looking at it with hb_gui. When this happens, I put back my
> original config using:
>
> cibadmin -E
> cibadmin -C -o resources -x all_resources
> cibadmin -C -o constraints -x constraints
>
> (Btw, I also had to separate my "all_resources" and "constraints" base files
> as above because they cannot seem to go together. Is this normal?)

no

>
> Kindly advice how could I possibly fix this problem.
>
> Thanks.
> --Joseph
>
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> See also: http://linux-ha.org/ReportingProblems
>
>