[ClusterLabs] Why Do Nodes Leave the Cluster?

[Andrei Borzenkov]

05.02.2020 20:55, Eric Robinson пишет:
> The two servers 001db01a and 001db01b were up and responsive. Neither had been rebooted and neither were under heavy load. There's no indication in the logs of loss of network connectivity. Any ideas on why both nodes seem to think the other one is at fault?

The very fact that nodes lost connection to each other *is* indication
of network problems. Your logs start too late, after any problem already
happened.

> 
> (Yes, it's a 2-node cluster without quorum. A 3-node cluster is not an option at this time.)
> 
> Log from 001db01a:
> 
> Feb  5 08:01:02 001db01a corosync[1306]: [TOTEM ] A processor failed, forming new configuration.
> Feb  5 08:01:03 001db01a corosync[1306]: [TOTEM ] A new membership (10.51.14.33:960) was formed. Members left: 2
> Feb  5 08:01:03 001db01a corosync[1306]: [TOTEM ] Failed to receive the leave message. failed: 2
> Feb  5 08:01:03 001db01a attrd[1525]:  notice: Node 001db01b state is now lost
> Feb  5 08:01:03 001db01a attrd[1525]:  notice: Removing all 001db01b attributes for peer loss
> Feb  5 08:01:03 001db01a cib[1522]:  notice: Node 001db01b state is now lost
> Feb  5 08:01:03 001db01a cib[1522]:  notice: Purged 1 peer with id=2 and/or uname=001db01b from the membership cache
> Feb  5 08:01:03 001db01a attrd[1525]:  notice: Purged 1 peer with id=2 and/or uname=001db01b from the membership cache
> Feb  5 08:01:03 001db01a crmd[1527]: warning: No reason to expect node 2 to be down
> Feb  5 08:01:03 001db01a stonith-ng[1523]:  notice: Node 001db01b state is now lost
> Feb  5 08:01:03 001db01a crmd[1527]:  notice: Stonith/shutdown of 001db01b not matched
> Feb  5 08:01:03 001db01a corosync[1306]: [QUORUM] Members[1]: 1
> Feb  5 08:01:03 001db01a corosync[1306]: [MAIN  ] Completed service synchronization, ready to provide service.
> Feb  5 08:01:03 001db01a stonith-ng[1523]:  notice: Purged 1 peer with id=2 and/or uname=001db01b from the membership cache
> Feb  5 08:01:03 001db01a pacemakerd[1491]:  notice: Node 001db01b state is now lost
> Feb  5 08:01:03 001db01a crmd[1527]:  notice: State transition S_IDLE -> S_POLICY_ENGINE
> Feb  5 08:01:03 001db01a crmd[1527]:  notice: Node 001db01b state is now lost
> Feb  5 08:01:03 001db01a crmd[1527]: warning: No reason to expect node 2 to be down
> Feb  5 08:01:03 001db01a crmd[1527]:  notice: Stonith/shutdown of 001db01b not matched
> Feb  5 08:01:03 001db01a pengine[1526]:  notice: On loss of CCM Quorum: Ignore
> 
> From 001db01b:
> 
> Feb  5 08:01:03 001db01b corosync[1455]: [TOTEM ] A new membership (10.51.14.34:960) was formed. Members left: 1
> Feb  5 08:01:03 001db01b crmd[1693]:  notice: Our peer on the DC (001db01a) is dead
> Feb  5 08:01:03 001db01b stonith-ng[1689]:  notice: Node 001db01a state is now lost
> Feb  5 08:01:03 001db01b corosync[1455]: [TOTEM ] Failed to receive the leave message. failed: 1
> Feb  5 08:01:03 001db01b corosync[1455]: [QUORUM] Members[1]: 2
> Feb  5 08:01:03 001db01b corosync[1455]: [MAIN  ] Completed service synchronization, ready to provide service.
> Feb  5 08:01:03 001db01b stonith-ng[1689]:  notice: Purged 1 peer with id=1 and/or uname=001db01a from the membership cache
> Feb  5 08:01:03 001db01b pacemakerd[1678]:  notice: Node 001db01a state is now lost
> Feb  5 08:01:03 001db01b crmd[1693]:  notice: State transition S_NOT_DC -> S_ELECTION
> Feb  5 08:01:03 001db01b crmd[1693]:  notice: Node 001db01a state is now lost
> Feb  5 08:01:03 001db01b attrd[1691]:  notice: Node 001db01a state is now lost
> Feb  5 08:01:03 001db01b attrd[1691]:  notice: Removing all 001db01a attributes for peer loss
> Feb  5 08:01:03 001db01b attrd[1691]:  notice: Lost attribute writer 001db01a
> Feb  5 08:01:03 001db01b attrd[1691]:  notice: Purged 1 peer with id=1 and/or uname=001db01a from the membership cache
> Feb  5 08:01:03 001db01b crmd[1693]:  notice: State transition S_ELECTION -> S_INTEGRATION
> Feb  5 08:01:03 001db01b cib[1688]:  notice: Node 001db01a state is now lost
> Feb  5 08:01:03 001db01b cib[1688]:  notice: Purged 1 peer with id=1 and/or uname=001db01a from the membership cache
> Feb  5 08:01:03 001db01b stonith-ng[1689]:  notice: [cib_diff_notify] Patch aborted: Application of an update diff failed (-206)
> Feb  5 08:01:03 001db01b crmd[1693]: warning: Input I_ELECTION_DC received in state S_INTEGRATION from do_election_check
> Feb  5 08:01:03 001db01b pengine[1692]:  notice: On loss of CCM Quorum: Ignore
> 
> 
> -Eric
> 
> 
> 
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