[Pacemaker] trouble configuring location with clones

[Andrew Beekhof]

On Sat, Jul 2, 2011 at 5:14 AM, Joshua Hoblitt <jhoblitt at noao.edu> wrote:
> Hello,
>
> I'm relatively new to pacemaker and I'm working on my second HA setup.
>
> The setup I need is very simplistic, I have two nodes (VMs actually)
> running pacemaker 1.0.10 on top of heartbeat 3.0.4.  The goal is two
> have both nodes running apache (for testing, etc) which a single VIP
> that fails over between them.  I'd also like to run pingd.

Try the ping RA instead.  pingd was not our best work.

>  What I've
> tried to setup is httpd & pingd as clones and then use location(s) such
> that that VIP can only be on a node where httpd & pingd are running.
>
> The basic config with just the VIP + clones is:
>
> --
> node $id="3981ed26-9f6d-4d32-94c6-18285f90b3c8" monitorb \
>        attributes standby="off"
> node $id="e5243ca3-5bd1-4f81-876b-4957ee480c6d" monitora \
>        attributes standby="off"
> primitive p_ip_monitor ocf:heartbeat:IPaddr2 \
>        params ip="140.252.25.75" cidr_netmask="24" \
>        op monitor interval="10s" timeout="40s" \
>        op start interval="0" timeout="20s" \
>        op stop interval="0" timeout="20s" \
>        meta target-role="Started"
> primitive p_lsb_httpd lsb:httpd \
>        op start interval="0" timeout="20s" \
>        op stop interval="0" timeout="20s"
> primitive p_pingd ocf:pacemaker:pingd \
>        params host_list="140.252.25.1" multiplier="100" \
>        meta target-role="Started"
> clone c_lsb_httpd p_lsb_httpd
> clone c_lsb_pingd p_pingd
> order o_httpd_before_ip inf: c_lsb_httpd:start p_ip_monitor:start
> property $id="cib-bootstrap-options" \
>        stonith-enabled="false" \
>        no-quorum-policy="ignore" \
>        dc-version="1.0.10-c3869c00c759b303ac2eff950db50fd3c845bb14" \
>        cluster-infrastructure="Heartbeat"
> rsc_defaults $id="rsc-options" \
>        resource-stickiness="100"
> --
>
> The status looks like:
>
> --
> Online: [ monitora monitorb ]
>
> p_ip_monitor    (ocf::heartbeat:IPaddr2):       Started monitora
>  Clone Set: c_lsb_httpd
>     Started: [ monitora monitorb ]
>  Clone Set: c_lsb_pingd
>     Started: [ monitora monitorb ]
> __
>
> And the VIP bounces around correct from reboots and standbys.
>
> However, when I try to add a location constraint as in this example:
> http://www.clusterlabs.org/wiki/Example_configurations#pingd_location_constraint
>
> --
> location l_ip_monitor_on_connected_node p_ip_monitor \
>        rule $id="l_ip_monitor_on_connected_node-rule" -inf: not_defined
> p_pingd or p_pingd lte 0
> --
>
> The cluster completely drops the VIP
>
> It seems like what I need for httpd should be:
>
> --
> location l_ip_monitor_on_httpd p_ip_monitor \
>                rule $id="l_ip_monitor_on_httpd-rule" -inf: not_defined
> p_lsb_httpd or p_lsb_httpd lte 0
> --
>
> But I suspect that I'm completely missing something as to how locations
> are supposed to work.  I tried colocations as well but that didn't work
> as I expected either.
>
> -Josh
>
> --
>
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