Node Affinity Rules With Terraform

If you’re also using HCL to write your Kubernetes manifests and you’re getting stuck with node affinity rules heres the rule I have to making sure that a node preferentially gets scheduled on a particular node. In this case the node name is “green-pi”, that’s my Pi with a mounted Zigbee dongle.

Here you go:

    affinity = {
      nodeAffinity = {
        preferredDuringSchedulingIgnoredDuringExecution = [
          {
            weight = 1
            preference = {
              "matchExpressions" = [
                {
                  key      = "kubernetes.io/hostname"
                  operator = "In"
                  values   = ["green-pi"]
                },
              ]
            }
          },
        ]
      }