kubespray/roles/network_plugin/flannel/templates/cni-flannel.yml.j2

---
kind: ConfigMap
apiVersion: v1
metadata:
  name: kube-flannel-cfg
  namespace: "kube-system"
  labels:
    tier: node
    app: flannel
data:
  cni-conf.json: |
    {
      "name":"cni0",
      "cniVersion":"0.3.1",
      "plugins":[
        {
          "type":"flannel",
          "delegate":{
            "forceAddress":true,
            "hairpinMode": true,
            "isDefaultGateway":true
          }
        },
        {
          "type":"portmap",
          "capabilities":{
            "portMappings":true
          }
        }
      ]
    }
  net-conf.json: |
    {
      "Network": "{{ kube_pods_subnet }}",
      "Backend": {
        "Type": "{{ flannel_backend_type }}"
      }
    }
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: kube-flannel
  namespace: "kube-system"
  labels:
    tier: node
    k8s-app: flannel
spec:
  selector:
    matchLabels:
      tier: node
      k8s-app: flannel
  template:
    metadata:
      labels:
        tier: node
        k8s-app: flannel
    spec:
      priorityClassName: system-node-critical
      serviceAccountName: flannel
      nodeSelector:
        beta.kubernetes.io/os: linux
      containers:
      - name: kube-flannel
        image: {{ flannel_image_repo }}:{{ flannel_image_tag }}
        imagePullPolicy: {{ k8s_image_pull_policy }}
        resources:
          limits:
            cpu: {{ flannel_cpu_limit }}
            memory: {{ flannel_memory_limit }}
          requests:
            cpu: {{ flannel_cpu_requests }}
            memory: {{ flannel_memory_requests }}
        command: [ "/opt/bin/flanneld", "--ip-masq", "--kube-subnet-mgr"{% if flannel_interface is defined %}, "--iface={{ flannel_interface }}"{% endif %}{% if flannel_interface_regexp is defined %}, "--iface-regex={{ flannel_interface_regexp }}"{% endif %} ]
        securityContext:
          privileged: true
        env:
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        - name: POD_IP
          valueFrom:
            fieldRef:
              fieldPath: status.podIP
        volumeMounts:
        - name: run
          mountPath: /run
        - name: cni
          mountPath: /etc/cni/net.d
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      - name: install-cni
        image: {{ flannel_cni_image_repo }}:{{ flannel_cni_image_tag }}
        command: ["/install-cni.sh"]
        env:
        # The CNI network config to install on each node.
        - name: CNI_NETWORK_CONFIG
          valueFrom:
            configMapKeyRef:
              name: kube-flannel-cfg
              key: cni-conf.json
        - name: CNI_CONF_NAME
          value: "10-flannel.conflist"
        volumeMounts:
        - name: cni
          mountPath: /host/etc/cni/net.d
        - name: host-cni-bin
          mountPath: /host/opt/cni/bin/
      hostNetwork: true
      dnsPolicy: ClusterFirstWithHostNet
      tolerations:
        - operator: Exists
        # Mark pod as critical for rescheduling (Will have no effect starting with kubernetes 1.12)
        - key: CriticalAddonsOnly
          operator: "Exists"
      volumes:
        - name: run
          hostPath:
            path: /run
        - name: cni
          hostPath:
            path: /etc/cni/net.d
        - name: flannel-cfg
          configMap:
            name: kube-flannel-cfg
        - name: host-cni-bin
          hostPath:
            path: /opt/cni/bin
  updateStrategy:
    rollingUpdate:
      maxUnavailable: {{ serial | default('20%') }}
    type: RollingUpdate