docker-flannel-cni

This is a fork of the now deprecated flannel-cni sidecar Docker image from the coreos project.

It contains a custom CI/CD workflow to build and publish multi-architecture flannel-cni Docker image for use in the Centrinix Cloud infrastructure because the upstream coreos project only provides the image for the amd64 architecture.

Note that this image is only necessary because the OpenStack Magnum Kubernetes deployment process still relies on it -- using this image is not recommended for other purposes.

Original README

Example for deploying flannel daemonset:

flannel-configmap:

apiVersion: v1
kind: ConfigMap
metadata:
  name: kube-flannel-cfg
  namespace: kube-system
  labels:
    tier: node
    k8s-app: flannel
data:
  cni-conf.json: |
    {
      "name": "cbr0",
      "type": "flannel",
      "delegate": {
        "isDefaultGateway": true
      }
    }
  net-conf.json: |
    {
      "Network": "{{ .PodCIDR }}",
      "Backend": {
        "Type": "vxlan"
      }
    }

flannel-daemonset:

apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: kube-flannel
  namespace: kube-system
  labels:
    tier: node
    k8s-app: flannel
spec:
  template:
    metadata:
      labels:
        tier: node
        k8s-app: flannel
    spec:
      containers:
      - name: kube-flannel
        image: quay.io/coreos/flannel:v0.7.1-amd64
        command: [ "/opt/bin/flanneld", "--ip-masq", "--kube-subnet-mgr", "--iface=$(POD_IP)"]
        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: quay.io/coreos/flannel-cni:0.1
        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
        volumeMounts:
        - name: cni
          mountPath: /etc/cni/net.d
        - name: host-cni-bin
          mountPath: /host/opt/cni/bin/
      hostNetwork: true
      tolerations:
      - key: node-role.kubernetes.io/master
        operator: Exists
        effect: NoSchedule
      volumes:
        - name: run
          hostPath:
            path: /run
        - name: cni
          hostPath:
            path: /etc/kubernetes/cni/net.d
        - name: flannel-cfg
          configMap:
            name: kube-flannel-cfg
        - name: host-cni-bin
          hostPath:
            path: /opt/cni/bin
  updateStrategy:
    rollingUpdate:
      maxUnavailable: 1
    type: RollingUpdate