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

[Bartosz Kaczyński]

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