Category Archive For "Pacemaker"
Recently I’ve had to rename a node on a production cluster – however, I did not have an experience on this yet so I decided to try on a sandbox and establish a known procedure. Without further ado, assuming we have 3 nodes and we want to rename ha3’s hostname to ha03.
[root@ha01 ~]# crm status
Last updated: Wed Jun 4 21:55:01 2014
Last change: Wed Jun 4 21:53:35 2014 via crm_attribute on ha01.localdomain
Stack: classic openais (with plugin)
Current DC: ha01.localdomain - partition with quorum
3 Nodes configured, 3 expected votes
6 Resources configured
Online: [ ha01.localdomain ha02.localdomain ha3.localdomain ]
Master/Slave Set: ms_MySQL [p_mysql]
Masters: [ ha01.localdomain ]
Slaves: [ ha02.localdomain ha3.localdomain ]
Clone Set: ping_gw_clone [ping_gw]
Started: [ ha01.localdomain ha02.localdomain ha3.localdomain ]
Here we …
Playing around with Percona Replication Manager, and being new to Pacemaker, some errors were somewhat cryptic.
May 26 09:53:39  ha01.localdomain pengine: notice: unpack_rsc_op: Preventing p_mysql from re-starting on ha02.localdomain: operation monitor failed 'not installed' (rc=5)
May 26 09:53:39  ha01.localdomain pengine: notice: unpack_rsc_op: Preventing op from re-starting on ha02.localdomain: operation monitor failed 'not installed' (rc=5)
First, it says here that I have ‘operation monitor failed’ on node ha02.localdomain. This error simply means ‘I cannot run the operation monitor because it is not installed’. Where does this operation supposed to come from, from the …