Capistrano actions

Github deploy action for Capistrano. Use this action to automate your capistrano deployment process.

Dependencies

This action expects Ruby to be installed along with Capistrano, see below for a basic workflow example that uses ruby/setup-ruby.

Inputs

target

Environment where deploy is to be performed to. E.g. "production", "staging". Default value is empty.

deploy_key

Required Symmetric key to decrypt private key. Must be a string.

enc_rsa_key_pth

Path to the encrypted key. Default "config/deploy_id_rsa_enc". You have to use either enc_rsa_key_pth or enc_rsa_key_val.

enc_rsa_key_val

Contents of the encrypted key. Best to use as repository secret. You have to use either enc_rsa_key_pth or enc_rsa_key_val.

working-directory

The directory from which to run the deploy commands, including bundle install.

Outputs

No outputs

Setting up CD using this action

1. Generate SSH keys on the target machine

$ ssh-keygen -t ed25519

2. Export public key to the authorized_keys to allow the usage of this keypair to login

$ cat ~/.ssh/id_ed25519.pub >> ~/.ssh/authorized_keys

3. Add public key from ~/.ssh/id_ed25519.pub to your repository's deployment keys via Settings / Deploy keys / Add
4. Encrypt your private key with a strong password. Please use these options, otherwise this action may not be able to decrypt your key.

$ openssl enc -aes-256-cbc -md sha512 -salt -in ~/.ssh/id_ed25519 -out deploy_id_ed25519_enc -k "PASSWORD" -a -pbkdf2

5. Add deploy_id_ed25519_enc file to your repository. Suggested path is config/deploy_id_ed25519_enc
6. Save the password used in step 4 as a secret in repository settings via Settings / Secrets / Add
7. Create YAML configuration for your workflow (example below)

Workflow example

# This is a basic workflow to help you get started with Actions
name: Deploy with Capistrano

# Controls when the action will run.
on:
  # Triggers the workflow on push or pull request events but only for the main branch
  push:
    branches: [main]

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "build"
  deploy:
    # The type of runner that the job will run on
    runs-on: ubuntu-latest

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - uses: actions/checkout@v2
      - uses: ruby/setup-ruby@v1
        with:
          # ruby-version: 3.0.1 # Not needed with a .ruby-version file
          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
      - uses: miloserdow/capistrano-deploy@v3 # you can use miloserdow/capistrano-deploy@master for the cuurent stable dev version
        with:
          target: development # Defines the environment that will be used for the deployment
          deploy_key: ${{ secrets.DEPLOY_ENC_KEY }} # Name of the variable configured in Settings/Secrets of your github project
          enc_rsa_key_pth: config/deploy_id_ed25519_enc

Example running this action with custom commands

In this example we are starting rails and Sidekiq with Capistrano

Personal access token

You need to create a personal access token with "repo" access like described here: https://docs.github.com/en/free-pro-team@latest/github/authenticating-to-github/creating-a-personal-access-token

Dispatch workflow

Create a new dispatch workflow like described here: https://docs.github.com/en/free-pro-team@latest/rest/reference/actions#create-a-workflow-dispatch-event

Workflow file:

name: Start Rails and Sidekiq with Capistrano

on:
  workflow_dispatch:
    inputs:
      environment:
        description: "The environment to deploy"
        required: true

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Turnstyle
        uses: softprops/turnstyle@master
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          abort-after-seconds: 3600
      - name: Set up Ruby
        uses: ruby/setup-ruby@v1
        with:
          ruby-version: 2.6.6
          bundler-cache: true
      - name: Deploy
        uses: kaspernj/capistrano-deploy@custom-capistrano-command
        with:
          capistrano_commands: '["puma:start", "sidekiq:start"]'
          target: ${{ github.event.inputs.environment }}
          deploy_key: ${{ secrets.DEPLOY_ENC_KEY }}
          enc_rsa_key_pth: config/deploy_id_ed25519_enc

Curl command

curl \
  -X POST \
  -H "Accept: application/vnd.github.v3+json" \
  -H "Authorization: Bearer $PERSONAL_GITHUB_TOKEN" \
  https://api.github.com/repos/$GITHUB_USERNAME/$GITHUB_REPO_NAME/actions/workflows/$WORKFLOW_FILE_NAME/dispatches \
  -d "{\"ref\":\"master\",\"inputs\":{\"environment\":\"$ENVIRONMENT_TO_DEPLOY\"}}"

This command makes Github start Rails and Sidekiq at the deployment.