daemonset.yaml

apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  labels:
    k8s-app: calico-node-mtu-setup
  name: calico-node-mtu-setup
  namespace: kube-system
spec:
  selector:
    matchLabels:
      k8s-app: calico-node-mtu-setup
  updateStrategy:
    rollingUpdate:
      maxUnavailable: 1
    type: RollingUpdate
  template:
    metadata:
      labels:
        k8s-app: calico-node-mtu-setup
    spec:
      serviceAccount: calico-node-mtu-setup
      serviceAccountName: calico-node-mtu-setup
      priorityClassName: system-node-critical
      nodeSelector:
        beta.kubernetes.io/os: linux
        projectcalico.org/ds-ready: "true"
      containers:
        - name: mtu-setup
          image: registry.gitlab.com/k8spin-open/container-images/kubectl:1.15.0
          imagePullPolicy: Always
          command: ["/bin/bash", "-c"]
          args: ["/etc/scripts/mtu.sh /host/etc/cni/net.d"]
          env:
            - name: CNI_CONF_NAME
              value: 10-calico.conflist
            - name: MTU_SIZE
              value: "1460"
            - name: RETRY_PERIOD
              value: "10"
            - name: NODE_NAME
              valueFrom:
                fieldRef:
                  apiVersion: v1
                  fieldPath: spec.nodeName
          resources:
            requests:
              cpu: 10m
              memory: 10Mi
          volumeMounts:
            - mountPath: /etc/scripts
              name: calico-node-mtu-setup
            - mountPath: /host/etc/cni/net.d
              name: cni-net-dir
      restartPolicy: Always
      tolerations:
        - effect: NoSchedule
          operator: Exists
        - effect: NoExecute
          operator: Exists
        - key: CriticalAddonsOnly
          operator: Exists
      volumes:
        - hostPath:
            path: /etc/cni/net.d
            type: ""
          name: cni-net-dir
        - name: calico-node-mtu-setup
          configMap:
            name: calico-node-mtu-setup
            defaultMode: 0777