[ClusterLabs] split brain cluster

[emmanuel segura]

Hi,

When you configure a cluster, the first thing you need to think about
is stonith aka fencing.

Thanks
Emmanuel

2015-11-16 15:18 GMT+01:00 Richard Korsten <richard at rkorsten.nl>:
> Hi Emmanuel,
>
> No stonith is not enabled. And yes i'm on a redhat based system.
>
> Greetings.
>
> Op ma 16 nov. 2015 om 15:09 schreef emmanuel segura <emi2fast at gmail.com>:
>>
>>
>> http://clusterlabs.org/doc/en-US/Pacemaker/1.1/html/Clusters_from_Scratch/ch08.html
>> and
>> https://github.com/ClusterLabs/pacemaker/blob/master/doc/pcs-crmsh-quick-ref.md
>> anyway you can use pcs config if you are using redhat
>>
>> 2015-11-16 15:01 GMT+01:00 Richard Korsten <richard at rkorsten.nl>:
>> > Hi Emmanuel,
>> >
>> > I'm not sure, how can i check it?
>> >
>> > Greetings Richard
>> >
>> > Op ma 16 nov. 2015 om 14:58 schreef emmanuel segura
>> > <emi2fast at gmail.com>:
>> >>
>> >> you configured the stonith?
>> >>
>> >> 2015-11-16 14:43 GMT+01:00 Richard Korsten <richard at rkorsten.nl>:
>> >> > Hello Cluster guru's.
>> >> >
>> >> > I'm having a bit of trouble with a cluster of ours. After an outage
>> >> > of 1
>> >> > node it went into a split brain situation where both nodes aren't
>> >> > talking to
>> >> > each other. Both say the other node is offline. I've tried to get
>> >> > them
>> >> > both
>> >> > up and running again by stopping and starting the cluster services on
>> >> > both
>> >> > nodes, one at a time. with out luck.
>> >> >
>> >> > I've been trying to reproduce the problem with a set of test servers
>> >> > but
>> >> > i
>> >> > can't seem to get it in the same state.
>> >> >
>> >> > Because of this i'm looking for some help because i'm not that known
>> >> > with
>> >> > pacemaker/corosync.
>> >> >
>> >> > this is the output of the command pcs status:
>> >> > Cluster name: MXloadbalancer
>> >> > Last updated: Mon Nov 16 10:18:44 2015
>> >> > Last change: Fri Nov 6 15:35:22 2015
>> >> > Stack: corosync
>> >> > Current DC: bckilb01 (1) - partition WITHOUT quorum
>> >> > Version: 1.1.12-a14efad
>> >> > 2 Nodes configured
>> >> > 3 Resources configured
>> >> >
>> >> > Online: [ bckilb01 ]
>> >> > OFFLINE: [ bckilb02 ]
>> >> >
>> >> > Full list of resources:
>> >> >  haproxy (systemd:haproxy): Stopped
>> >> >
>> >> > Resource Group: MXVIP
>> >> > ip-192.168.250.200 (ocf::heartbeat:IPaddr2): Stopped
>> >> > ip-192.168.250.201 (ocf::heartbeat:IPaddr2): Stopped
>> >> >
>> >> > PCSD Status:
>> >> > bckilb01: Online
>> >> > bckilb02: Online
>> >> >
>> >> > Daemon Status:
>> >> > corosync: active/enabled
>> >> > pacemaker: active/enabled
>> >> > pcsd: active/enabled
>> >> >
>> >> >
>> >> > And the config:
>> >> > totem {
>> >> > version: 2
>> >> > secauth: off
>> >> > cluster_name: MXloadbalancer
>> >> > transport: udpu }
>> >> >
>> >> > nodelist {
>> >> > node { ring0_addr: bckilb01 nodeid: 1 }
>> >> > node { ring0_addr: bckilb02 nodeid: 2 } }
>> >> > quorum { provider: corosync_votequorum two_node: 1 }
>> >> > logging { to_syslog: yes }
>> >> >
>> >> > If any has an idea about how to get them working together again
>> >> > please
>> >> > let
>> >> > me know.
>> >> >
>> >> > Greetings Richard
>> >> >
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>> >> >
>> >>
>> >>
>> >>
>> >> --
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>>
>>
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