Upgrade notes

Upgrade path

ACOS 6.1.1 and 6.2.0 can directly upgrade to ACOS 6.3.0

Upgrading process

The ACOS upgrade process is as follows:

Upgrade feature

ACOS performs upgrades using a zero-downtime approach.

Restrictions during the upgrade

Upgrading the cluster and kernel does not affect normal business operations. However, it is prohibited to perform the following operations during the upgrade:

• Adding or removing hosts from the cluster.
• Removing a cluster from AOC.
• Manually entering or exiting maintenance mode for a host.
• Manually shutting down or restarting the host.
• Performing the role conversion on the host.