Tolerations

Setting tolerations on a node are used to schedule Pods on tainted nodes. This provides an easy way to avoid Pods using the node. Only those with a particular toleration would be scheduled.

An operator can be included in a Pod specification, defaulting to Equal if not declared. The use of the operator Equal requires a value to match. The Exists operator should not be specified. If an empty key uses the Exists operator, it will tolerate every taint. If there is no effect, but a key and operator are declared, all effects are matched with the declared key.

tolerations:
- key: "server"
  operator: "Equal"
  value: "ap-east"
  effect: "NoExecute"
  tolerationSeconds: 3600

In the above example, the Pod will remain on the server with a key of server and a value of ap-east for 3600 seconds after the node has been tainted with NoExecute. When the time runs out, the Pod will be evicted.