Cordon and drain GKE pool

What

In GKE, if you want to upgrade a node pool, or take one down for maintanance, this is the easiest thing to follow

How

Locate the pool name

In GKE console, navigate to the Cluster then click NODES and make note of the pool name

Cordon Node

kubectl cordon -l cloud.google.com/gke-nodepool=<pool name>

Drain node

kubectl drain -l cloud.google.com/gke-nodepool=<pool name> --delete-emptydir-data --ignore-daemonsets --force

Delete old nodes

kubecl delete node -l cloud.google.com/gke-nodepool=<pool name>

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