Example: Upgrading operating system

In a high-availability environments, you must perform specific actions prior to performing operating system upgrades.

The following examples can help you determine what you need to do to perform an upgrade in your cluster environment. Before performing the upgrade or any actions you should first determine the current cluster version for your cluster.
Notes:
  1. Start of change7.1 represents the current release of the operating system.End of change
  2. Start of change7.2 represents the new release of the operating system.End of change
  3. Start of changeV6R1 represents the prior release of the operating system.End of change
Start of changeExample 1: The node to be upgraded is at IBM® i 7.1. All other nodes in the cluster are at IBM i 7.1 or higher. The current cluster version is 7.End of change
Action:
  1. Start of changeUpgrade node to IBM i 7.2.End of change
  2. Start the upgraded node.
Start of changeExample 2: The node to be upgraded is at IBM i 7.1. All other nodes in the cluster are at IBM i 7.1 or higher. The current cluster version is 6.End of change
Action:
  1. Start of changeUpgrade the node to IBM i 7.2. End of change
  2. Start the upgraded node.
Start of changeExample 3: The node to be upgraded is IBM i V5R4. All other nodes in the cluster are at IBM i V5R4 or higher. The current cluster version is 5. End of change
Action:
  1. Upgrade the node to IBM i 7.1.
  2. Start the upgraded node.
Start of changeExample 4: The node to be upgraded is at IBM i V6R1. All other nodes in the cluster are at IBM i V5R4 or higher. The current cluster version is 5.End of change
Actions:
  1. Start of changeUpgrade all nodes to V6R1.End of change
  2. Start all of the upgraded nodes.
  3. Start of changeChange the cluster version to 6.End of change
  4. Start of changeUpgrade the node to 7.2.End of change
  5. Start the upgraded node.
Start of changeExample 5: The node to be upgraded is at IBM i V5R4 or lower. All other nodes in the cluster are at IBM i V5R4 or lower. The current cluster version is less than or equal to 5.End of change
Actions:
  1. Start of changeUpgrade all nodes to V6R1.End of change
  2. Start all of the upgraded nodes.
  3. Start of changeChange the cluster version to 6.End of change
  4. Start of changeUpgrade the node to 7.2.End of change
  5. Start the upgraded node.

The following table provides actions you need to take when performing an upgrade in a cluster environment.

Start of change
Table 1. Upgrading nodes to IBM i 7.2
Current® release of node you are upgrading Current cluster version Actions
V7R1 6 or 7 Start of change
  1. Upgrade the node to IBM i 7.2.
  2. Start the upgraded node.
End of change
V6R1 5 or 6
  1. Start of changeUpgrade the node to IBM i 7.2.End of change
  2. Start the upgraded node.
V5R4 or lower less than or equal to 5
  1. Start of changeUpgrade all nodes to V6R1.End of change
  2. Start all of the upgraded node.
  3. Start of changeChange the cluster version to 6.End of change
  4. Start of changeUpgrade the node to IBM i 7.2.End of change
  5. Start the upgraded node.
End of change
Parent topic: Scenario: Upgrading operating system in a high-availability environment