[ClusterLabs] Unable to add a node to an existing cluster

[Nicholas Yang]

Hi Bartk,

You may look into the status and logs of service `corosync` and 
`pacemaker` to check what's going wrong.

systemctl status corosync
systemctl status pacemaker
journalctl --unit corosync
journalctl --unit pacemaker

Regards,
Nicholas Yang

On 8/8/23 04:45, Bartosz Kaczyński wrote:
> Hello ClusterLabs community!
>
> I'm in the process of learning this technology, using the course "Say 
> Goodbye to Downtime with SUSE Linux Enterprise Server (Repeat)" [1] 
> where the instructor guides through the process of installing a 
> cluster on one node and joining to the cluster on another node.
>
> The instructor is using SLES 15. The entire test environment is quite 
> complex in terms of networking and storage. I think I managed to 
> replicate it on openSUSE Leap 15.5.
>
> I initiated the cluster from node01 with the following command:
>
> node01:~ # crm cluster init -u \
>     -s /dev/disk/by-path/ip-10.10.11.111:3260-iscsi-iqn.(...)-lun-0 \
>     -s /dev/disk/by-path/ip-10.10.12.112:3260-iscsi-iqn.(...)-lun-0 \
>     -s /dev/disk/by-path/ip-10.10.13.113:3260-iscsi-iqn.(...)-lun-0
>
> From node02, I then tried to join it to the cluster with the following 
> command [2]
>
> I also believe that I met all the requirements regarding the network 
> connectivity between the nodes and cluster resolution. ICMP is working 
> between all interfaces, the /etc/hosts file is also filled in on both 
> hosts, and time synchronization is ensured with chronyd.
>
> The network diagram is available as a downloadable graphic [3], and 
> someone has created a similar tutorial using VMware as the hypervisor 
> (while I am using KVM) [4].
>
> I am aware that providing assistance in such a situation can be 
> challenging, and the problem may occur at various levels. However, is 
> there anything that I might have overlooked, or is there anything that 
> comes to your mind?
>
> [1] https://open.sap.com/courses/suse2-1-pc
> [2] https://paste.opensuse.org/pastes/254c28adf1c5
> [3] 
> https://opensap-pinboard.s3.openhpicloud.de/courses/6IB8s3snE8SkA2AxXCJWOL/topics/1nYPUtHIu4f73RLSTHdkqw/44nDvDjlO5bs8eoCxu0Uqh/openSAP-HA-LabEnv-Diagram.png
> [4] 
> https://blogs.sap.com/2021/03/13/setting-up-suse-high-availability-cluster-quick-start-demo/
>
> Regards,
> bartk
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