Rancher Support recommends Customer to notify them ahead of planned maintenance events for upgrade and migration. The notification can be made as a support ticket. At a minimum, this ticket should have information on:
- Current Rancher version
- Target Rancher version
- Reason for upgrade
- Upgrade date and maintenance time window
But it would be best if Customer could provide the information requested in this document: Upgrade Notification RFI Template. Based on the information provided, Rancher Support can provide any applicable advisories to the Customer for the planned event. Rancher Support may request Customer to run specific information gathering scripts. Data collected from these scripts will be used by Rancher Support to understand the Customer deployment and validate the upgrade path that is being considered.