Run Utility Commands in a Cluster

You can run the nodeinfo command on a cluster node to get information about it.

Syntax:
nodeinfo [is_master | master_ip | master_public_dns]

nodeinfo is_master reports if the node is a Coordinator or Worker in boolean format (1/0).

nodeinfo master_ip reports the public IP address of the coordinator node.

nodeinfo master_public_dns reports the public DNS address of the coordinator node.

Add $(nodeinfo master_public_dns) to a node bootstrap script or any shell script to get the public DNS hostname of the Coordinator node.

See Understanding a Node Bootstrap Script for more information.

You can also use the QDS GUI to see the public and private IP addresses of worker and Coordinator nodes: navigate to the Control Panel > Clusters and click on the number in the Nodes column of a running cluster.

On a cluster node, run the nodeinfo command to check if the node is a worker or Coordinator or get the Coordinator node’s IP address and public DNS address. Here is an example illustration of running the nodeinfo command on an AWS cluster node:

[[email protected] /]$ nodeinfo is_master
1
[[email protected] /]$ nodeinfo master_ip
10.111.11.11
[[email protected] /]$ nodeinfo master_public_dns
ec2-54-54-544-544.compute-1.amazonaws.com
[[email protected] /]$

You can also see How do I check if a node is a coordinator node or a worker node?.