...

Please following docker installation guide for Ubuntu arm64 to install Docker CE:

https://docs.docker.com/install/linux/docker-ce/ubuntu/

...

which will skip ca-cert verification.
After the `slave` joining the Kubernetes cluster, in the master node, you could check the cluster
node with the command::

   $ kubectl get nodes

in which the token is given in the master's kubeadm init.or:which will skip ca-cert verification.

...

Install the Calico CNI Plugin to Kubernetes Cluster
...
Install the Etcd Database
::
$ kubectl apply -
...
f https://raw.githubusercontent.com/Jingzhao123/arm64TemporaryCalico/temporay_arm64/
   v3.3/getting-started/kubernetes/installation/hosted/etcd-arm64.yaml
Install the RBAC Roles required for Calico
::

   $ kubectl apply -f https://docs.projectcalico.org/v3.3/getting-started/kubernetes/installation/rbac.yaml
Install Calico to system
Firstly, we should get the configuration file from web site and modify the corresponding image from amd64 to arm64 version. Then, by using kubectl, the calico pod will be created.
::
   $ wget https://docs.projectcalico.org/v3.3/getting-started/kubernetes/installation/hosted/calico.yaml
Since the "quay.io/calico" image repo does not support does not multi-arch, we have to replace the “quay.io/calico” image path to "calico" which supports multi-arch.
::
   $ sed -i "s/quay.io\/calico/calico/" calico.yaml
Deploy the Calico using following command:
   $ kubectl apply -f calico.yaml
  .. Attention::

     In calico.yaml file, there is an option "IP_AUTODETECTION_METHOD" about choosing
     network interface. The default value is "first-found" which means the first valid
     IP address (except local interface, docker bridge). So if the number of network-interface
     is more than 1 on your server, you should configure it depends on your networking
     environments. If it does not configure it properly, there are some error about
     calico-node pod: "BGP not established with X.X.X.X".
Remove the taints on master node
::
   $ kubectl taint nodes --all node-role.kubernetes.io/master-

Verification for the Work of Kubernetes
Now we can verify the work of Kubernetes and Calico with Kubernets pod and service creation and accessing based on Nginx which is a widely used web server.
Firstly, create a file named nginx-app.yaml to describe a Pod and service by:
::
   $ cat <<EOF >~/nginx-app.yaml
   apiVersion: v1
   kind: Service
   metadata:
      name: nginx
      labels:
        app: nginx
   spec:
      type: NodePort
      ports:
      - port: 80
        protocol: TCP
        name: http
      selector:
        app: nginx
   ---
   apiVersion: v1
   kind: ReplicationController
   metadata:
      name: nginx
   spec:
      replicas: 2
      template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80
    EOF
then test the Kubernetes working status with the script:
   set -ex

   kubectl create -f ~/nginx-app.yaml
   kubectl get nodes
   kubectl get services
   kubectl get pods
   kubectl get rc

   r="0"
   while [ $r -ne "2" ]
   do
      r=$(kubectl get pods | grep Running | wc -l)
      sleep 60
   done

   svcip=$(kubectl get services nginx  -o json | grep clusterIP | cut -f4 -d'"')
   sleep 10
   wget http://$svcip
   kubectl delete -f ./examples/nginx-app.yaml
   kubectl delete -f ./nginx-app.yaml
   kubectl get rc
   kubectl get pods
   kubectl get services

Helm Install on Arm64
Helm is a tool for managing Kubernetes charts. Charts are packages of pre-configured Kubernetes resources. The installation of Helm on arm64 is as followes:
  ::
...

     $ wget https://storage.googleapis.com/kubernetes-helm/helm-v2.12.3-linux-arm64.tar.gz
...

     $ xvf helm-v2.12.3-linux-arm64.tar.gz
     $ sudo cp linux-arm64/helm /usr/bin
     $ sudo cp linux-arm64/tiller /usr/bin

Further Information
We would like to provide a walk through shell script to automate the installation of Kubernetes and Calico in the future. But this README is still useful for IEC developers and users.
...
Trevor Tao: trevor.tao@arm.com Jingzhao  
Jingzhao Ni: jingzhao.ni@arm.com Jianlin  
Jianlin Lv: jianlin.lv@arm.com
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