You can upgrade Ubuntu in single-node and
		multi-node deployments.
		Before you begin
			Ensure that EFA is at release 2.3.0 or later. Upgrade if necessary. For more
				information, see EFA Upgrade.
			Ensure that the nodes you want to upgrade are healthy and that EFA services are
				operating.
		About this task
EFA is supported on Ubuntu 16.04 and 18.04
			as described in Supported Platforms and Deployment Models. You can upgrade from 16.04 to 18.04 while EFA is installed. 
Note   
				
					- This process is not supported for deployments of EFA on TPVM.
- This process assumes that the node you are upgrading is connected to the
						internet. The Ubuntu Release Notes indicate that there
						is no offline upgrade option.
Procedure
- 
				Update the Ubuntu package
					database. 
				
			
- 
				Upgrade all Ubuntu packages.
				
			
- 
				To upgrade Ubuntu on a single node, take the following steps.
				
					- 
						Upgrade the node.
						
							# sudo do-release-upgrade 
 EFA is not operational while the upgrade is in progress. 
- 
						Reboot the system.
					
- 
						Verify that EFA is operational.
					
 
- 
				To upgrade Ubuntu in a two-node cluster, take the following steps.
				
					- 
						Upgrade one node in the cluster.
						
							# sudo do-release-upgrade 
 If you run the upgrade on the active node, then failover to the
							standby node occurs. EFA is not operational during the failover. 
- 
						Upgrade the second node. 
					
- 
						Verify that the nodes are at the new version.
					
- 
						Verify that EFA is operational.