[ClusterLabs] Loss of quoram not detected. corosync 1.4.8 , pacemaker 1.1.14. CentOS 6

[neeraj ch]

Ah. Okay. Thank you, let me try that.

On Thu, Apr 13, 2017 at 3:22 PM, Digimer <lists at alteeve.ca> wrote:

> Neither option is feasible. There are compatibility issues with corosync
> v2 on EL6, and adapting corosync v1 to be a quorum provider is basically
> recreate corosync v2.
>
> The pcs tool makes the overhead of adding cman to the mix go away, and
> it's part of why it was created in the first place. Use it, and you can
> pretend cman doesn't exist for all intent and purpose.
>
> If that's not good enough, switch to EL7 where it's pure pacemaker and
> corosync v2.
>
> digimer
>
> On 13/04/17 06:18 PM, neeraj ch wrote:
> > I have dreaded that answer. Maybe I can fix vote quorum on corosync 1.4.
> > Or maybe I can get 2.X working on EL6.  Really don't wanna deal with
> > another layer.
> >
> > Thanks.
> >
> >
> > On Thu, Apr 13, 2017 at 2:10 PM, Digimer <lists at alteeve.ca
> > <mailto:lists at alteeve.ca>> wrote:
> >
> >     On 13/04/17 05:07 PM, neeraj ch wrote:
> >     > Hi,
> >     >
> >     > I have three node cluster set up. My corosync config is as follows.
> >     >
> >     > compatibility: whitetank
> >     > totem {
> >     >     version: 2
> >     >     secauth: on
> >     >     threads: 0
> >     >     interface {
> >     >     member{
> >     >         memberaddr: ip
> >     >         }
> >     >     member{
> >     >         memberaddr:ip
> >     >          }
> >     >     member{
> >     >         memberaddr:ip
> >     >         }
> >     >     bindnetaddr:172.31.31.12
> >     >     ringnumber: 0
> >     >     mcastport: 5405
> >     >     ttl: 1
> >     >     }
> >     >     transport: udpu
> >     > }
> >     > logging {
> >     >     fileline: off
> >     >     to_stderr:yes
> >     >     to_logfile: yes
> >     >     to_syslog:yes
> >     >     logfile:/var/log/cluster/corosync.log
> >     >     debug:off
> >     >     timestamp: on
> >     >     logger_subsys {
> >     >     subsys: AMF
> >     >     debug:off
> >     >     }
> >     > }
> >     > service {
> >     >     name: pacemaker
> >     >     ver: 1
> >     > }
> >     > amf {
> >     >     mode: disabled
> >     > }
> >     >
> >     >
> >     >
> >     > I went on to partition the master, the rest of the cluster
> considered
> >     > the master down and elected a new master.
> >     >
> >     > But the corosync on the partitoned node didnt realize loss of
> >     quoram and
> >     > consequently pacemaker didnt shut down the resources. Giving me a
> >     > multi-master scenario.
> >     >
> >     > I have tried adding , quorum tool as votequoram and it seems to
> >     give the
> >     > same result.
> >     >
> >     > Why isn't corosync not detecting this scenario ? any ideas.
> >     >
> >     > I used IP tables to block all UDP traffic in and out of the node .
> I
> >     > didn't block traffic on lo.
> >     >
> >     > any help would be appreciated.
> >
> >     On EL6, cman is the quorum provider. You need to have a skeleton
> >     cluster.conf setup with it's fencing passed over to pacemaker via
> >     fence_pcmk.
> >
> >     It you use pcs/pcsd, it will configure everything for you. Do NOT
> >     configure corosync directly; You need to configure it inside cman
> >     itself. Reset corosync.conf back to defaults.
> >
> >     Reference;
> >
> >     http://clusterlabs.org/doc/en-US/Pacemaker/1.1-plugin/html-
> single/Clusters_from_Scratch/index.html
> >     <http://clusterlabs.org/doc/en-US/Pacemaker/1.1-plugin/
> html-single/Clusters_from_Scratch/index.html>
> >
> >     --
> >     Digimer
> >     Papers and Projects: https://alteeve.com/w/
> >     "I am, somehow, less interested in the weight and convolutions of
> >     Einstein’s brain than in the near certainty that people of equal
> talent
> >     have lived and died in cotton fields and sweatshops." - Stephen Jay
> >     Gould
> >
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>
> --
> Digimer
> Papers and Projects: https://alteeve.com/w/
> "I am, somehow, less interested in the weight and convolutions of
> Einstein’s brain than in the near certainty that people of equal talent
> have lived and died in cotton fields and sweatshops." - Stephen Jay Gould
>
> _______________________________________________
> Users mailing list: Users at clusterlabs.org
> http://lists.clusterlabs.org/mailman/listinfo/users
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