[ClusterLabs] resources cluster stoped with one node

[Ken Gaillot]

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.


> 
> [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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-- 
Ken Gaillot <kgaillot at redhat.com>