[Pacemaker] two active-active service processes, but only one vIP

Sat Sep 6 05:24:22 UTC 2014

Hi

You case seems to be similar to mine.

I have processes (bind, http, squid, etc but not ldap as ldap handles names resolution to multiple ip's).

I have re written ocf::heartbeat:IPaddr2 for each service and as part of the monitor and start procedures I also check the application.

Reason I don't use the service as resources is I don't need to squids running on the same box or http or bind's.

I copy /usr/lib/ocf/resource.d/heartbeat/IPaddr2 to /usr/lib/ocf/resource.d/mine/httpVIP, then added the bits then create a resource, works well.

A

> -----Original Message-----
> From: David Magda [mailto:dmagda at ee.ryerson.ca]
> Sent: Saturday, 6 September 2014 1:24 PM
> To: pacemaker at oss.clusterlabs.org
> Subject: [Pacemaker] two active-active service processes, but only one vIP
> 
> Hello,
> 
> I'm new to Pacemaker, and so not completely knowledgeable about settings
> things up, and my search-fu is not finding an answer to what I want to do
> AFAICT:
> 
> I have two nodes that I wish to run OpenLDAP slapd on. I want Pacemaker /
> CRM to check the health of the OpenLDAP daemon, and if it's healthy, I want
> that node to be a candidate for having a vIP live on it. If OpenLDAP's slapd is
> not healthy (process is down, incorrect query results, etc.) then I want the vIP
> to fail over to the other (presumably healthy) node.
> 
> (I also want to do something similar with BIND named, but we'll use
> OpenLDAP as the working case for now.)
> 
> The main thing is that I want the daemon to run on each node in active-
> active configuration (so Nagios can keep tabs on things), and only have the
> vIP for the LDAP service fail-over.
> 
> The vIP is straight forward enough:
> 
> 	sudo crm configure primitive vip_ldap2 \
> 		 ocf:heartbeat:IPaddr2 params ip="10.0.0.89"
> cidr_netmask="32"
> 
> The following line creates a resource where slapd only runs on one of the
> nodes at a time, but I want it running on both:
> 
> 	sudo crm configure primitive srv_slapd \
> 		ocf:heartbeat:slapd op monitor interval="30s"
> 
> I'm using Debian 7 with default pacemaker 1.1.7-1 package, with the
> following resource agent:
> 
> 	https://github.com/ClusterLabs/resource-
> agents/blob/master/heartbeat/slapd
> 
> The slapd process can be either managed or unmanaged, but I think I would
> prefer unmanaged so that we can fiddle with it using the regular OS-level
> service commands. We don't use HA / clustering in a lot of places, and so it
> will probably be easy to forget that CRM is there, and so could lead to
> frustration if it's doing behind our backs.
> 
> From what I could tell, I want to create a primitive (is-managed=false) and
> make an anonymous clone, which can then be run on multiple nodes.
> Somehow? Maybe?
> 
> Thanks for any info.
> 
> Regards,
> David
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