Unable to scale out Aria Operations for Networks from 1 to 3 nodes

Products

• VCF Operations for Networks

Issue/Introduction

• After clustering has been started in the UI you see the following error:

• On Platform node1 in /var/log/arkin/clustering.log you may see the following error:

Exception("Failed executing command errcode[%d] command:%s" % (code, cmd_log))
Exception: Failed executing command errcode[1536] command:sudo ssh -q -i /home/support/.ssh/id_rsa_vnera_cluster_keypair -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null  support@##.###.##.## "sudo -S su ubuntu -c 'hdfs zkfc -formatZK -force'"
2026-02-11T21:32:03.718Z INFO 

 

Environment

Aria Operations for Networks 6.13.0

Aria Operations for Networks 6.14.X

Cause

Communication between Platform node 1 and the 2 new Platform nodes is not allowed thru NSX DFW rule so Platform node1 cannot reach nodes 2 and 3 for Clustering.

 

To test the communication from Platform 1 to Platform 2 and 3 you can run the following commands as the Support user and you should have a SUCCESSFUL connection

#ub

#nc -vz platform# 2181

Example

ubuntu@platform1:~$ nc -vz platform2 2181
Connection to platform2 (###.###.##.##) 2181 port [tcp/*] succeeded!
ubuntu@platform1:~$ nc -vz platform3 2181
Connection to platform3 (##.###.##.##) 2181 port [tcp/*] succeeded!

Resolution

Allow communication between all Platform nodes thru NSX DFW.

Once communication has been enabled re-run above commands to verify connection and restart clustering process.