[ClusterLabs] newbie questions
lists at alteeve.ca
Tue May 31 17:05:41 EDT 2016
On 31/05/16 04:59 PM, Jay Scott wrote:
> Cluster newbie
> Centos 7
> trying to follow the "Clusters from Scratch" intro.
> 2 nodes (yeah, I know, but I'm just learning)
2-Node is perfectly fine, you just need to be aware of a couple things
(like prioritized fencing via 'delay="x"' and setting corosync to
> [root at smoking ~]# pcs status
> Cluster name:
> Last updated: Tue May 31 15:32:18 2016 Last change: Tue May 31
> 2016 by root via cibadmin on smoking
> Stack: unknown
> Current DC: NONE
> 2 nodes and 1 resource configured
> OFFLINE: [ mars smoking ]
Nothing will work until the nodes are online.
> Full list of resources:
> ClusterIP (ocf::heartbeat:IPaddr2): Stopped
> PCSD Status:
> smoking: Online
> mars: Online
> Daemon Status:
> corosync: active/enabled
> pacemaker: active/enabled
> pcsd: active/enabled
> What concerns me at the moment:
> I did
> pcs resource enable ClusterIP
> while simultaneously doing
> tail -f /var/log/cluster/corosync.log
> (the only log in there)
Pacemaker logs is what you want. Once corosync is configured properly
(and let pacemaker start it), you can basically forget that corosync exists.
> and nothing happens in the log, but the ClusterIP
> stays "Stopped". Should I be able to ping that addr?
> I can't.
> It also says OFFLINE: and both of my machines are offline,
> though the PCSD says they're online. Which do I trust?
> [root at smoking ~]# pcs property show stonith-enabled
> Cluster Properties:
> stonith-enabled: false
Enable fencing. It keeps your cluster sane and predictable.
> yet I see entries in the corosync.log referring to stonith.
> I'm guessing that's normal.
> My corosync.conf file says the quorum is off.
> I also don't know what to include in this for any of you to
> help me debug.
Run 'tail -f -n 0 /var/log/messages' on both nodes and then start
pacemaker on both nodes. Use fpaste to share the log output please.
> Ahh, also, is this considered "long", and if so, where would I post
> to the web?
Long messages here are fine.
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