[Pacemaker] Pacemaker and LDAP (389 Directory Service)

[Serge Dubrouski]

I have a similar setup running with this simple configuration:

node mexico
node washington
primitive LDAP lsb:openldap \
        op monitor interval="30s"
primitive masterIP ocf:heartbeat:IPaddr \
        params ip="XXX.XXX.XXX.XXX" cidr_netmask="21" \
        meta migration-threshold="3"
primitive pingd ocf:pacemaker:ping \
        params dampen="5s" multiplier="1000" host_list="XXX.XXX.XXX.XXX" \
        op monitor interval="20s" timeout="15s"
clone LDAP-clone LDAP \
        meta target-role="Started" is-managed="true"
clone pingd-clone pingd \
        meta target-role="Started"
location cli-prefer-masterIP masterIP \
        rule $id="cli-prefer-rule-masterIP" inf: #uname eq washington
location connected masterIP \
        rule $id="connected-rule" -inf: not_defined pingd or pingd lte 0
location primNode masterIP \
        rule $id="prefered_primNode" 500: #uname eq washington
colocation IP_with_LDAP inf: masterIP LDAP-clone

Not on Amazon cloud but on a real hardware though. You can ignore pingd
part.

On Mon, Jun 27, 2011 at 4:56 PM, veghead <sean at studyblue.com> wrote:

> Serge Dubrouski <sergeyfd at ...> writes:
> > On Mon, Jun 27, 2011 at 3:33 PM, veghead <sean <at> studyblue.com>
> wrote:
> > If I remove the co-location, won't the elastic_ip resource just stay
> where it
> > is? Regardless of what happens to LDAP?
> >
> > Right. That's why I think that you don't really want to do it. You have
> > to make sure that your IP is up where you LDAP is up.
>
> Okay. So I took a step and revamped the configuration to test the
> elastic_ip
> less frequently and with a long timeout. I committed the changes, but "crm
> status" doesn't reflect the resources in question.
>
> Here's the new config:
>
> ---snip---
> # crm configure show
> node $id="d2b294cf-328f-4481-aa2f-cc7b553e6cde" ldap1.example.ec2
> node $id="e2a2e42e-1644-4f7d-8e54-71e1f7531e08" ldap2.example.ec2
> primitive elastic_ip lsb:elastic-ip \
>        op monitor interval="30" timeout="300" on-fail="ignore"
> requires="nothing"
> primitive ldap lsb:dirsrv \
>        op monitor interval="15s" on-fail="standby" requires="nothing"
> clone ldap-clone ldap
> colocation ldap-with-eip inf: elastic_ip ldap-clone
> order ldap-after-eip inf: elastic_ip ldap-clone
> property $id="cib-bootstrap-options" \
>        dc-version="1.0.11-1554a83db0d3c3e546cfd3aaff6af1184f79ee87" \
>        cluster-infrastructure="Heartbeat" \
>        stonith-enabled="false" \
>        no-quorum-policy="ignore" \
>        stop-all-resources="true"
> rsc_defaults $id="rsc-options" \
>        resource-stickiness="100"
> ---snip---
>
> And here's the output from "crm status":
>
> ---snip---
> # crm status
> ============
> Last updated: Mon Jun 27 18:50:14 2011
> Stack: Heartbeat
> Current DC: ldap2.studyblue.ec2 (e2a2e42e-1644-4f7d-8e54-71e1f7531e08) -
> partition with quorum
> Version: 1.0.11-1554a83db0d3c3e546cfd3aaff6af1184f79ee87
> 2 Nodes configured, unknown expected votes
> 2 Resources configured.
> ============
>
> Online: [ ldap1.example.ec2 ldap2.example.ec2 ]
> ---snip---
>
> I restarted the nodes one at a time - first I restarted ldap2, then I
> restarted
> ldap1. When ldap1 went down, ldap2 stopped the ldap resource and didn't
> make any
> attempt to start the elastic_ip resource:
>
> ---snip---
> pengine: [12910]: notice: unpack_config: On loss of CCM Quorum: Ignore
> pengine: [12910]: info: unpack_config: Node scores: 'red' = -INFINITY,
> 'yellow'
> = 0, 'green' = 0
> pengine: [12910]: info: determine_online_status: Node ldap2.example.ec2 is
> online
> pengine: [12910]: notice: native_print: elastic_ip       (lsb:elastic-ip):
> Stopped
> pengine: [12910]: notice: clone_print:  Clone Set: ldap-clone
> pengine: [12910]: notice: short_print:      Stopped: [ ldap:0 ldap:1 ]
> pengine: [12910]: notice: LogActions: Leave   resource elastic_ip
> (Stopped)
> pengine: [12910]: notice: LogActions: Leave   resource ldap:0    (Stopped)
> pengine: [12910]: notice: LogActions: Leave   resource ldap:1    (Stopped)
> ---snip---
>
> After heartbeat/pacemaker came back up on ldap1, it terminated the ldap
> service
> on ldap1. Now I'm just confused.
>
>
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>



-- 
Serge Dubrouski.
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