Decommissioning Servers

This guide will detail the process for removing a server from Sidero. The process is fairly simple with a few pieces of information.

• For the given server, take note of any serverclasses that are configured to match the server.

• Take note of any clusters that make use of aforementioned serverclasses.

• For each matching cluster, edit the cluster resource with kubectl edit cluster and set .spec.paused to true. Doing this ensures that no new machines will get created for these servers during the decommissioning process.

• If you want to mark a server to be not allocated after it’s accepted into the cluster, set the .spec.cordoned field to true. This will prevent the server from being allocated to any new clusters (still allowing it to be wiped).

• If the server is already part of a cluster (kubectl get serverbindings -o wide should provide this info), you can now delete the machine that corresponds with this server via kubectl delete machine <machine_name>.

• With the machine deleted, Sidero will reboot the machine and wipe its disks.

• Once the disk wiping is complete and the server is turned off, you can finally delete the server from Sidero with kubectl delete server <server_name> and repurpose the server for something else.

• Finally, unpause any clusters that were edited in step 3 by setting .spec.paused to false.