Hello, we have a Production SQL 2016 Alwayson cluster with 2 nodes in one datacenter1 & 1 node in a DR site. The secondary passive node in datacenter1 is having issues. So we are planning to remove that passive node from the cluster and add a new server as secondary passive node. Since it's a passive node, I don't think there will be any downtime in either removing/adding that passive node. Planning to perform that work during the day time. Here are the high level steps I am planning to do:
1. Remove the faulty passive node from the cluster
2. Add the new passive node to the cluster
3. Take a full DB & tran log backup from the active node
4. Stop all the DB backup jobs in all the nodes of the cluster
5. Restore the full DB backup with NORECOVERY onto the new secondary passive node
6. Restore the tran log backup with NORECOVERY onto the new secondary passive node
7. Sync up the logins between Primary & secondary Passive node
8. Configure SQL Alwayson Availability group to add this new secondary node
9. Start the sync process between the active & passive node
Please let me know if anything is missing from the above steps.
Thanks.
sqldev