[ClusterLabs] Why my node1 couldn't back to the clustering chain?

[Ken Gaillot]

On Thu, 2021-04-08 at 14:14 +0000, Jason Long wrote:
> Hello,
> I stopped node1 manually as below:
> 
> [root at node1 ~]# pcs cluster stop node1
> node1: Stopping Cluster (pacemaker)...
> node1: Stopping Cluster (corosync)...
> [root at node1 ~]#
> [root at node1 ~]# pcs status
> Error: error running crm_mon, is pacemaker running?
>   Could not connect to the CIB: Transport endpoint is not connected
>   crm_mon: Error: cluster is not available on this node
> 
> And after it, I checked my cluster logs: 
> https://paste.ubuntu.com/p/9KNyt5nB79/
> Then, I started node1:
> 
> [root at node1 ~]# pcs cluster start node1
> node1: Starting Cluster...
> [root at node1 ~]#
> 
> And checked my cluster logs again: 
> https://paste.ubuntu.com/p/GQFbdhMvV3/
> The status of my cluster is:
> 
> # pcs status 
> Cluster name: mycluster
> Cluster Summary:
>   * Stack: corosync
>   * Current DC: node2 (version 2.0.5-10.fc33-ba59be7122) - partition
> with quorum
>   * Last updated: Thu Apr  8 18:33:49 2021
>   * Last change:  Thu Apr  8 17:18:49 2021 by root via cibadmin on
> node1
>   * 2 nodes configured
>   * 3 resource instances configured
> 
> 
> Node List:
>   * Online: [ node1 node2 ]
> 
> 
> Full List of Resources:
>   * Resource Group: apache:
>     * httpd_fs    (ocf::heartbeat:Filesystem):     Started node2
>     * httpd_vip    (ocf::heartbeat:IPaddr2):     Started node2
>     * httpd_ser    (ocf::heartbeat:apache):     Started node2
> 
> 
> Daemon Status:
>   corosync: active/enabled
>   pacemaker: active/enabled
>   pcsd: active/enabled
> 
> But, I can't browse the Apache web server? Why?
> 
> Thanks.

Based on the above status output, the web server is running on node2,
using the IP address specified by the httpd_vip resource. Are you
trying to contact the web server at a name corresponding to that IP?
-- 
Ken Gaillot <kgaillot at redhat.com>