Perform a graceful reboot of a cluster¶
Available since 2.23.0 for non-MOSK clusters
For MOSK-based deployments, the feature support will become available in one of the following Container Cloud releases.
You can perform a graceful reboot on a management, regional, or managed cluster. Use the below procedure to cordon, drain, and reboot the required cluster machines using a rolling reboot without workloads interruption. The procedure is also useful for a bulk reboot of machines, for example, on large clusters.
The reboot occurs in the order of cluster upgrade policy that you can change for managed clusters as described in Change the upgrade order of a machine or machine pool.
The cluster and machines must have the
Ready status to
perform a graceful reboot.
To perform a rolling reboot of a cluster:
GracefulRebootRequestresource with a name that matches the name of the required cluster. For the resource fields description, see GracefulRebootRequest resource.
spec:machines, add the machine list or leave it empty to reboot all cluster machines.
Wait until all specified machines are rebooted. You can monitor the reboot status of the cluster and machines using the
Conditions:GracefulRebootfields of the corresponding
GracefulRebootRequestobject is automatically deleted once the reboot on all target machines completes.
To monitor the live machine status:
kubectl get machines <machineName> -o wide
Example of system response:
NAME READY LCMPHASE NODENAME UPGRADEINDEX REBOOTREQUIRED WARNINGS demo-0 true Ready kaas-node-c6aa8ad3 1 true
To reboot a single node, for example, for maintenance purposes, refer to Enable cluster and machine maintenance mode.