First, you must have a Linux VPS (I'll use Ubuntu 22 in this tutorial).
Requirements
- Docker
- Docker Compose
- Docker Rollout Plugin
How to install Docker Rollout Plugin
It's very simple:
# Create directory for Docker cli plugins
mkdir -p ~/.docker/cli-plugins
# Download docker-rollout script to Docker cli plugins directory
curl https://raw.githubusercontent.com/wowu/docker-rollout/master/docker-rollout -o ~/.docker/cli-plugins/docker-rollout
# Make the script executable
chmod +x ~/.docker/cli-plugins/docker-rollout
Docker Rollout Usage
Run docker rollout <name>
instead of docker compose up -d <name>
to update a service without downtime.
$ docker rollout -f docker-compose.yml <service-name>
GitHub Actions build_and_deploy.yml workflow
In this case I'm using a private registry on Digital Ocean.
name: CI
# 1
# Controls when the workflow will run
on:
# Triggers the workflow on push events but only for the master branch
push:
branches: [main]
# Allows you to run this workflow manually from the Actions tab
workflow_dispatch:
inputs:
version:
description: 'Image version'
required: true
#2
env:
REGISTRY: 'registry.digitalocean.com/YOUR_REGISTRY_NAME'
IMAGE_NAME: 'YOUR_IMAGE_NAME'
#3
jobs:
build_and_push:
runs-on: ubuntu-latest
steps:
- name: Checkout the repo
uses: actions/checkout@v4
- name: Build container image
run: docker build -t $(echo $REGISTRY)/$(echo $IMAGE_NAME):$(echo $GITHUB_SHA | head -c7) .
- name: Install doctl
uses: digitalocean/action-doctl@v2
with:
token: ${{ secrets.DIGITALOCEAN_ACCESS_TOKEN }}
- name: Log in to DigitalOcean Container Registry with short-lived credentials
run: doctl registry login --expiry-seconds 600
- name: Remove all old images
run: if [ ! -z "$(doctl registry repository list | grep "$(echo $IMAGE_NAME)")" ]; then doctl registry repository delete-manifest $(echo $IMAGE_NAME) $(doctl registry repository list-tags $(echo $IMAGE_NAME) | grep -o "sha.*") --force; else echo "No repository"; fi
- name: Push image to DigitalOcean Container Registry
run: docker push $(echo $REGISTRY)/$(echo $IMAGE_NAME):$(echo $GITHUB_SHA | head -c7)
deploy:
runs-on: ubuntu-latest
needs: build_and_push
steps:
- name: Deploy to Digital Ocean droplet via SSH action
uses: appleboy/ssh-action@v1.0.3
with:
host: ${{ secrets.OCI_HOST }}
username: ${{ secrets.OCI_USERNAME }}
key: ${{ secrets.OCI_SSH_KEY }}
envs: IMAGE_NAME,REGISTRY,{{ secrets.DIGITALOCEAN_ACCESS_TOKEN }},GITHUB_SHA
script: |
whoami
cd ~/app
pwd
ls -la
# Login to registry
docker login -u ${{ secrets.DIGITALOCEAN_ACCESS_TOKEN }} -p ${{ secrets.DIGITALOCEAN_ACCESS_TOKEN }} registry.digitalocean.com
# Update the APP image in docker-compose.yml
sed -i '0,/image:/s|image: .*|image: '$(echo $REGISTRY)'/'$(echo $IMAGE_NAME)':'$(echo $GITHUB_SHA | head -c7)'|' docker-compose.yml
# Pull the latest image
docker compose pull
# Here is the magic docker plugin
docker rollout -f docker-compose.yml app
echo "Deployed with success to production"
Conclusion
I hope this tutorial helps you in some way,
best regards Rafael Thayto.
Photo by Bernd 📷 Dittrich on Unsplash
Originalmente postado em https://thayto.com/blog/zero-downtime-deployment-with-docker-compose-in-an-oci-vps-using-github-actions dia 13 de setembro de 2024.
Top comments (0)