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Deploying Docker Images to Digital Ocean without a registry via GitHub Actions

We can use an ssh key we created and copied to our Digital Ocean droplit to test ssh access from GitHub Actions using the appleboy/ssh-action workflow.

Make sure to specify the keys in the GH secrets panel so the workflow has access to them.

yaml

name: remote ssh command
on: [push]
jobs:
  build:
    name: Build
    runs-on: ubuntu-latest
    steps:
      - name: executing remote ssh commands
        uses: appleboy/ssh-action@master
        with:
          host: ${{ secrets.DIGITAL_OCEAN_IP }}
          username: ${{ secrets.DIGITAL_OCEAN_USER }}
          key: ${{ secrets.DIGITAL_OCEAN_KEY }}
          port: 22
          script: |
            echo "what"
            whoami

Successful output will look like this:

======CMD======
echo "what"
whoami

======END======
out: what
out: ***
==============================================
✅ Successfully executed commands to all host.
==============================================

Now that we know everything is working, this is a GitHub Action that

builds a docker image
saves the image to a .tar file
scps the .tar file to the Digital Ocean Droplit
uses docker load to load the tar file as an image
kills the currently running containers (all of them)
runs a new container
prunes unused resources to reclaim space

yaml

name: build and deploy corgo-bot
on: [push]
jobs:
  build:
    name: Build
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: build docker image
        run: |
          docker build -t biscarch/corgo-bot .
          docker save -o corgo-bot.tar biscarch/corgo-bot
      - name: scp docker image to DO
        uses: appleboy/scp-action@master
        with:
          host: ${{ secrets.DIGITAL_OCEAN_IP }}
          username: ${{ secrets.DIGITAL_OCEAN_USER }}
          key: ${{ secrets.DIGITAL_OCEAN_KEY }}
          port: 22
          source: corgo-bot.tar
          target: /opt
      - name: executing remote ssh commands
        uses: appleboy/ssh-action@master
        with:
          host: ${{ secrets.DIGITAL_OCEAN_IP }}
          username: ${{ secrets.DIGITAL_OCEAN_USER }}
          key: ${{ secrets.DIGITAL_OCEAN_KEY }}
          port: 22
          script: |
            docker load -i /opt/corgo-bot.tar
            rm /opt/corgo-bot.tar
            docker kill $(docker ps -q)
            docker run --env-file /opt/corgo-bot.env -d biscarch/corgo-bot:latest
            docker system prune -f