[ClusterLabs] resources cluster stoped with one node

[Tomas Jelinek]

Dne 20. 03. 24 v 23:56 Ken Gaillot napsal(a):
> On Wed, 2024-03-20 at 23:29 +0100, mierdatutis mi wrote:
>> HI,
>> I've configured a cluster of two nodes.
>> When I start one node only I see that the resources won't start.
> 
> Hi,
> 
> In a two-node cluster, it is not safe to start resources until the
> nodes have seen each other once. Otherwise, there's no way to know
> whether the other node is unreachable because it is safely down or
> because communication has been interrupted (meaning it could still be
> running resources).
> 
> Corosync's two_node setting automatically takes care of that by also
> enabling wait_for_all. If you are certain that the other node is down,
> you can disable wait_for_all in the Corosync configuration, start the
> node, then re-enable wait_for_all.

If you are using pcs, you can achieve the same thing easily by running 
'pcs quorum unblock' on the online node.

Regards,
Tomas

>>
>> [root at nodo1 ~]# pcs status --full
>> Cluster name: mycluster
>> Stack: corosync
>> Current DC: nodo1 (1) (version 1.1.23-1.el7-9acf116022) - partition
>> WITHOUT quorum
>> Last updated: Wed Mar 20 23:28:45 2024
>> Last change: Wed Mar 20 19:33:09 2024 by root via cibadmin on nodo1
>>
>> 2 nodes configured
>> 3 resource instances configured
>>
>> Online: [ nodo1 (1) ]
>> OFFLINE: [ nodo2 (2) ]
>>
>> Full list of resources:
>>
>>   Virtual_IP     (ocf::heartbeat:IPaddr2):       Stopped
>>   Resource Group: HA-LVM
>>       My_VG      (ocf::heartbeat:LVM-activate):  Stopped
>>       My_FS      (ocf::heartbeat:Filesystem):    Stopped
>>
>> Node Attributes:
>> * Node nodo1 (1):
>>
>> Migration Summary:
>> * Node nodo1 (1):
>>
>> Fencing History:
>>
>> PCSD Status:
>>    nodo1: Online
>>    nodo2: Offline
>>
>> Daemon Status:
>>    corosync: active/enabled
>>    pacemaker: active/enabled
>>    pcsd: active/enabled
>>
>> Do you know what these behaviors are?
>> Thanks
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