[Pacemaker] running same resource on both nodes through clone

[ESWAR RAO]

Hi Dejan,

Thanks for the response.

In our setup, we want the resources to start on the 2 nodes (active/active)
so that the downtime would be less.

All clients connect to the VIP. If the resource on any one node goes down,
I expect the VIP should be moved to another node and since the resource is
already running on the another node the down time would be less.

I thought of configuring them as is-manged= false then the pacemaker
wouldn't restart the resources on failed node.

Thanks
Eswar


On Fri, Jun 7, 2013 at 7:32 PM, Dejan Muhamedagic <dejanmm at fastmail.fm>wrote:

> Hi,
>
> On Fri, Jun 07, 2013 at 12:49:49PM +0530, ESWAR RAO wrote:
> > Hi All,
> >
> > I am trying to run same RA on both nodes using clone.
> > My set up is a 2 node cluster with HB+pacemaker.
> >
> > The RA aren't started automatically.
> > They are started through pacemaker only.
> >
> > +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > #crm configure primitive ha_vip ocf:IPaddr2 params ip=192.168.101.205
> > cidr_netmask=32 nic=eth1 op monitor interval=30s
> >
> > #crm configure primitive oc_d1 lsb::testd1 meta allow-migrate="true"
> > migration-threshold="1" failure-timeout="30s" op monitor interval="3s"
> > #crm configure clone oc_d1_clone oc_d1 meta clone-max="2"
> > clone-node-max="1" globally-unique="false" interleave="true"
> >
> > #crm configure primitive oc_d2 lsb::testd2 meta allow-migrate="true"
> > migration-threshold="3" failure-timeout="30s" op monitor interval="5s"
> > #crm configure clone oc_d2_clone oc_d2 meta clone-max="2"
> > clone-node-max="1" globally-unique="false" interleave="true"
> >
> > # crm configure colocation oc-ha_vip inf: ha_vip oc_d1_clone oc_d2_clone
> > +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> >
> > I observe the RAs are not getting started in the other node.
> >
> > ha_vip    (ocf::heartbeat:IPaddr2):    Started ubuntu190
> > Clone Set: oc_d1_clone [oc_d1]
> >      Started: [ ubuntu190 ]
> >      Stopped: [ oc_d1:1 ]
> >  Clone Set: oc_d2_clone [oc_d2]
> >      Started: [ ubuntu190 ]
> >      Stopped: [ oc_d2:1 ]
> >
> >
> > But if I remove the colocation constraint then the RA are starting on
> the 2
> > nodes.
> > But without colocation, if any RA fails the vip will not migrate which is
> > bad.
>
> Can you explain why do you need the oc_* resources running both
> nodes but at the same time they depend on the IP address which is
> not cloned. Looks to me a condition which is simply impossible to
> meet.
>
> Thanks,
>
> Dejan
>
> > Can some one help me out in my issue.
> >
> >
> > Thanks
> > Eswar
>
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