![](/wp-content/uploads/2019/02/image-32.png)
In order to update vIDM you need to identify the master node. This can be done by running the following command on any of the nodes
curl http://localhost:9200/_cluster/state/master_node,nodes?pretty
Running this command will give the following output.
![](/wp-content/uploads/2019/02/image-36-1024x514.png)