add-ssh-key's Introduction

Add your SSH public key to all hosts of your cluster easily!

Adding a SSH key to all the hosts in the environment is tedious, this script makes it easy!

Example DaemonSet manifest file:

Follow the two steps in the following yaml file and launch it using "kubectl"

kubectl apply -f <filename>

daemonset-add-ssh-key.yaml

apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: add-ssh-key
spec:
  selector:
    matchLabels:
      name: add-ssh-key
  template:
    metadata:
      labels:
        name: add-ssh-key
    spec:
      containers:
      - name: add-ssh-key
        image: leodotcloud/add-ssh-key
        imagePullPolicy: Always
        volumeMounts:
        - name: userhomedir
          mountPath: /tmp/user
        env:
          - name: SSH_KEY_TO_ADD
            value: "ssh-rsa blahblahblah [email protected]"    # Step 1: Replace the value with your SSH public key
      volumes:
      - name: userhomedir
        hostPath:
          path: /home/ubuntu    # Step 2: Replace this user home directory path accordingly

If you have isolated planes for etcd/controlplane, you might have to add tolerations to schedule the pods of the DaemonSet on those nodes.

daemonset-add-ssh-key-with-tolerations.yaml

apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: add-ssh-key
spec:
  selector:
    matchLabels:
      name: add-ssh-key
  template:
    metadata:
      labels:
        name: add-ssh-key
    spec:
      containers:
      - name: add-ssh-key
        image: leodotcloud/add-ssh-key
        imagePullPolicy: Always
        volumeMounts:
        - name: userhomedir
          mountPath: /tmp/user
        env:
          - name: SSH_KEY_TO_ADD
            value: "ssh-rsa blahblahblah [email protected]"    # Step 1: Replace the value with your SSH public key
      volumes:
      - name: userhomedir
        hostPath:
          path: /home/ubuntu    # Step 2: Replace this user home directory path accordingly
      tolerations:
      - key: "node-role.kubernetes.io/controlplane"
        value: "true"
        operator: "Equal"
        effect: "NoSchedule"
      - key: "node-role.kubernetes.io/etcd"
        value: "true"
        operator: "Equal"
        effect: "NoExecute"

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