When do upgrades get triggered?

[janpieper]

Our k3s nodes get upgraded at aroud 3am in the morning, but I can't find any configuration that says that the upgrades should be triggered at that time.

Is there any documentation or explanation on when a system upgrade gets triggered? 🤔 The plans only contain information about the pre-conditions and what to do, but not when to do things.

[brandond]

By default the SUC polls the channel server periodically, and applies the update as soon as it is available.

Recent releases of the SUC have the option to put a time window on the plan:

• Multiple enhancements - leader election, events, time window, delay after upgrading #335