Hi Vorkady,
The logs in /var/log/sas/viya/rabbitmq-server/default/* and /tmp/sas_setup_rabbit_cluster.log should contain more information.
Without knowing what those logs contain, we can't be certain what the issue is, but there are two common causes behind rabbit clustering errors:
1. DNS problems, such as when multiple NICs exist on the machines. This can be resolved by using host_vars as seen here:
https://communities.sas.com/t5/SAS-Communities-Library/Understanding-Network-Binding-Variables-in-SAS-Viya-3-5/ta-p/627000
You can create a file where the filename is the ansible alias of that machine, IE: viya_node1.yml and the contents of the file contain your network config as seen here:
$ cat /path/to/sas_viya_playbook/host_vars/sasviya01.yml
---
network_conf:
SAS_HOSTNAME: sasviya01.race.sas.com
SAS_BIND_ADDR_IF: "eth0"
I would also make sure that the /etc/hosts files between the machines have consistent values.
2. Port blockages. IE: firewalld doesn't have the necessary items in its whitelist or iptables rules are filtering the necessary ports. This can be resolved by ensuring your ports aren't blocked.
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