[ClusterLabs] Weird Fencing Behavior?

Confidential Company sgurovosa at gmail.com
Tue Jul 17 03:58:48 EDT 2018


On my two-node active/passive setup, I configured fencing via
fence_vmware_soap. I configured pcmk_delay=0 on both nodes so I expected
that both nodes will be stonithed simultaenously.

On my test scenario, Node1 has ClusterIP resource. When I disconnect
service/corosync link physically, Node1 was fenced and Node2 keeps alive
given pcmk_delay=0 on both nodes.

Can you explain the behavior above?

See my config below:

[root at ArcosRhel2 cluster]# pcs config
Corosync Nodes:
 ArcosRhel1 ArcosRhel2
Pacemaker Nodes:
 ArcosRhel1 ArcosRhel2

 Resource: ClusterIP (class=ocf provider=heartbeat type=IPaddr2)
  Attributes: cidr_netmask=32 ip=
  Operations: monitor interval=30s (ClusterIP-monitor-interval-30s)
              start interval=0s timeout=20s (ClusterIP-start-interval-0s)
              stop interval=0s timeout=20s (ClusterIP-stop-interval-0s)

Stonith Devices:
 Resource: Fence1 (class=stonith type=fence_vmware_soap)
  Attributes: action=off ipaddr= login=admin passwd=123pass
pcmk_host_list=ArcosRhel1 pcmk_monitor_timeout=60s port=ArcosRhel1(Joniel)
ssl_insecure=1 pcmk_delay_max=0s
  Operations: monitor interval=60s (Fence1-monitor-interval-60s)
 Resource: fence2 (class=stonith type=fence_vmware_soap)
  Attributes: action=off ipaddr= login=admin passwd=123pass
pcmk_delay_max=0s pcmk_host_list=ArcosRhel2 pcmk_monitor_timeout=60s
port=ArcosRhel2(Ben) ssl_insecure=1
  Operations: monitor interval=60s (fence2-monitor-interval-60s)
Fencing Levels:

Location Constraints:
  Resource: Fence1
    Enabled on: ArcosRhel2 (score:INFINITY)
  Resource: fence2
    Enabled on: ArcosRhel1 (score:INFINITY)
Ordering Constraints:
Colocation Constraints:
Ticket Constraints:

 No alerts defined

Resources Defaults:
 No defaults set
Operations Defaults:
 No defaults set

Cluster Properties:
 cluster-infrastructure: corosync
 cluster-name: ARCOSCLUSTER
 dc-version: 1.1.16-12.el7-94ff4df
 have-watchdog: false
 last-lrm-refresh: 1531810841
 stonith-enabled: true

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