[Pacemaker] stonith q

[Andrei Borzenkov]

В Sun, 2 Nov 2014 10:01:59 +0000
Alex Samad - Yieldbroker <Alex.Samad at yieldbroker.com> пишет:

> 
> 
> > -----Original Message-----
> > From: Digimer [mailto:lists at alteeve.ca]
> > Sent: Sunday, 2 November 2014 9:49 AM
> > To: The Pacemaker cluster resource manager
> > Subject: Re: [Pacemaker] stonith q
> > 
> > On 01/11/14 06:27 PM, Alex Samad - Yieldbroker wrote:
> > > Hi
> > >
> > > 2 node cluster, running under vmware
> {snip}
> > >
> > > Alex
> > 
> > In cman's cluster.conf, you configure the fence device 'fence_pcmk', as you
> > have. That is a dummy/hook fence agent that simply passes fence requests
> > up to pacemaker to actually perform. Pacemaker will then tell cman whether
> > the fence succeeded or failed.
> > 
> > To make sure you have cluster.conf configured properly, it should look
> > something like this;
> > 
> > ====
> > ccs -f /etc/cluster/cluster.conf --createcluster an-anvil-04 ccs -f
> > /etc/cluster/cluster.conf --setcman two_node="1" expected_votes="1"
> > ccs -f /etc/cluster/cluster.conf --addnode an-a04n01.alteeve.ca ccs -f
> > /etc/cluster/cluster.conf --addnode an-a04n02.alteeve.ca ccs -f
> > /etc/cluster/cluster.conf --addfencedev pcmk agent=fence_pcmk ccs -f
> > /etc/cluster/cluster.conf --addmethod pcmk-redirect an-a04n01.alteeve.ca
> > ccs -f /etc/cluster/cluster.conf --addmethod pcmk-redirect an-
> > a04n02.alteeve.ca ccs -f /etc/cluster/cluster.conf --addfenceinst pcmk an-
> > a04n01.alteeve.ca pcmk-redirect port=an-a04n01.alteeve.ca ccs -f
> > /etc/cluster/cluster.conf --addfenceinst pcmk an-a04n02.alteeve.ca pcmk-
> > redirect port=an-a04n02.alteeve.ca ccs -f /etc/cluster/cluster.conf --
> > setfencedaemon post_join_delay="30"
> > cat /etc/cluster/cluster.conf
> > ====
> > <cluster config_version="10" name="an-anvil-04">
> >    <fence_daemon post_join_delay="30"/>
> >    <clusternodes>
> >      <clusternode name="an-a04n01.alteeve.ca" nodeid="1">
> >        <fence>
> >          <method name="pcmk-redirect">
> >            <device name="pcmk" port="an-a04n01.alteeve.ca"/>
> >          </method>
> >        </fence>
> >      </clusternode>
> >      <clusternode name="an-a04n02.alteeve.ca" nodeid="2">
> >        <fence>
> >          <method name="pcmk-redirect">
> >            <device name="pcmk" port="an-a04n02.alteeve.ca"/>
> >          </method>
> >        </fence>
> >      </clusternode>
> >    </clusternodes>
> >    <cman expected_votes="1" two_node="1"/>
> >    <fencedevices>
> >      <fencedevice agent="fence_pcmk" name="pcmk"/>
> >    </fencedevices>
> >    <rm>
> >      <failoverdomains/>
> >      <resources/>
> >    </rm>
> > </cluster>
> > ====
> 
> [Alex Samad - Yieldbroker] 
> Actually I do, I just put the initial bit in there.
> 
> > 
> > Then you move over to pacemaker and configure stonith there. How you do
> > this will vary a bit for your fence agent. I use IPMI fencing, which looks like
> > this:
> > 
> > ====
> > pcs cluster cib stonith_cfg
> > pcs -f stonith_cfg stonith create fence_n01_ipmi fence_ipmilan
> > pcmk_host_list="an-a04n01.alteeve.ca" ipaddr="an-a04n01.ipmi"
> > action="reboot" login="admin" passwd="Initial1" delay=15 op monitor
> > interval=10s pcs -f stonith_cfg stonith create fence_n02_ipmi fence_ipmilan
> > pcmk_host_list="an-a04n02.alteeve.ca" ipaddr="an-a04n02.ipmi"
> > action="reboot" login="admin" passwd="Initial1" op monitor interval=10s
> > pcs cluster cib-push stonith_cfg pcs property set stonith-enabled=true ====
> [Alex Samad - Yieldbroker] 
> 
> Problem is that uses ipmi I don't want to use that.
> 
> I would like to translater a stonight shutdown/reboot into a OS reboot commend.
> 

That hardly makes sense except in pure test environment. Stonith is
needed when you do not know state of partner node, in which case you
cannot be sure your reboot/shutdown command will be executed, nor that
you can reach your partner at all.

If you are running under Vmware, use stonith/vmware or stonith/vcenter.