Kubernetes rollback action

An action to handle kubectl interaction for kube rollbacks

This will be used to provide functionality like:

• list available rollbacks
• Roll back a deployment

Requirements

• Requires kubectl to be installed and available on the PATH.
• Requires https://github.com/smartlyio/kubernetes-auth-action to have been run first

Inputs

Name	Default	Required	Description
kubernetesContext		yes	Kubernetes context name. Usually the name of the cluster, but can be random.
serviceName		yes	Name of the kubernetes service to operate on.
deploymentName		no	Name of the deployment within service to operate rollbacks on
command		yes	Canary support command to run. One of `[listRecentDeploys
rollbackSha		no	Git revision to validate with the checkRevision command.

Outputs

Name	Description
SLACK_NOTIFICATION_MESSAGE	Message that should be sent to slack as a response to the command
ALLOW_ROLLBACK	Whether or not rollback should be allowed. true/false

Example usage

name: Is Locked

<manual-trigger>

jobs:
  list_deploys:
    runs-on: ubuntu-latest
    id: is_locked
    steps:
      - uses: actions/checkout@v2
      - name: Authenticate with the cluster
        env:
          KUBERNETES_AUTH_TOKEN: ${{ secrets.KUBERNETES_AUTH_TOKEN }}
        uses: smartlyio/kubernetes-auth-action@v1
        with:
          kubernetesClusterDomain: my-kubernetes-server.example.com
          kubernetesContext: test-context
          kubernetesNamespace: test-service
      - name: List recent deploys for rollback
        uses: smartlyio/kubernetes-rollback-action@v1
        with: 
          kubernetesContext: test-context
          serviceName: test-service
          deploymentName: web
          command: listRecentDeploys

  rollback:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Authenticate with the cluster
        env:
          KUBERNETES_AUTH_TOKEN: ${{ secrets.KUBERNETES_AUTH_TOKEN }}
        uses: smartlyio/kubernetes-auth-action@v1
        with:
          kubernetesClusterDomain: my-kubernetes-server.example.com
          kubernetesContext: test-context
          kubernetesNamespace: test-service
      - name: Check if deploy is allowed
        uses: smartlyio/kubernetes-rollback-action@v1
        id: check_revision
        with: 
          kubernetesContext: test-context
          serviceName: test-service
          deploymentName: web
          rollbackSha: abc123
          command: checkRevision
      - name: notify deploy started/failed
        uses: smartlyio/workflow-webhook@v1
        with:
          webhook_url: "${{ secrets.SLACK_NOTIFY_URL }}"
          webhook_auth: "${{ secrets.SLACK_NOTIFY_TOKEN }}"
          webhook_secret: "${{ secrets.SLACK_NOTIFY_HMAC_SECRET }}"
          data: |
            {
              "channels": ["${{ github.event.inputs.channel }}"],
              "jobs": {},
              "user": "${{ github.event.inputs.user }}",
              "run_id": ${{ github.run_id }},
              "thread_id": "${{ github.event.inputs.threadId }}",
              "notification_override": {
                "text": "${{ steps.check_revision.outputs.SLACK_NOTIFICATION_MESSAGE }}"
              }
            } 
      - name: checkout revision
        if: steps.check_revision.outputs.ALLOW_ROLLBACK == 'true'
        uses: actions/checkout@v2
        with:
          ref: ${{ fixme.rollbackSha }}
            
      - name: Deploy with krane
        if: steps.check_revision.outputs.ALLOW_ROLLBACK == 'true'

Development

Install the dependencies

$ npm install

Build the typescript and package it for distribution

$ npm run build && npm run package

Run the tests ✔️

$ npm test

 PASS  ./index.test.js
  ✓ ...

...