6.4. Enabling global maintenance mode
You must place the self-hosted engine environment in global maintenance mode before performing any setup or upgrade tasks on the Manager virtual machine.
Procedure
Log in to one of the self-hosted engine nodes and enable global maintenance mode:
# hosted-engine --set-maintenance --mode=global
Confirm that the environment is in global maintenance mode before proceeding:
# hosted-engine --vm-status
You should see a message indicating that the cluster is in global maintenance mode.
You can now update the Manager to the latest version of 4.3.