Docker Compose File For Watchtower

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Docker Compose File For Watchtower

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Category : Docker Compose Files

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Watchtower is a docker container that will update the version of other running containers. You can change the environment settings as required for your installation – see the full documentation for more info. 

version: '3'

services:
  watchtower:
    image: containrrr/watchtower
    restart: always
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /etc/timezone:/etc/timezone:ro
    environment:
      - WATCHTOWER_CLEANUP=true
      - WATCHTOWER_LABEL_ENABLE=true
      - WATCHTOWER_INCLUDE_RESTARTING=true
    labels:
      - "com.centurylinklabs.watchtower.enable=true"

Create a new directory and save the above file inside it as docker-compose.yml. 

mkdir watchtower
cd watchtower
vi docker-compose.yml

Run docker-compose up -d to fetch the image from the docker hub and create your Watchtower instance. By default, Watchtower will check for updates every 24 hours from the moment you start the Watchtower container. You’ll now need to add labels to your docker containers that you’d like to update which is described below.

Update Containers

The above docker-compose file will get Watchtower up and running but in it’s current state it won’t update any of your existing docker containers. The above docker-compose file is safe by default so that it won’t do anything other than update itself – arguably useless, but safe!

To update your other docker containers you need to add a label to their docker-compose file that sets com.centurylinklabs.watchtower.enable=true. Watchtower will then pick up that label and know that it needs to include that docker container (or service) in it’s updates.

The below is a random docker-compose file that I use to run a database for development work. I’ve added a labels attribute and set the parameter that Watchtower looks for when running it’s update routine. For your containers to be included in Watchtowers update routine you’ll need to add the same labels attribute to ALL of your docker-compose services, just like in the below example – its a simple copy and paste. 

version: '3.6'

services:
    db1:
        image: mysql:5.7
        restart: unless-stopped
        volumes:
          - ./data/mysql:/var/lib/mysql
          - ./config/mysql/conf.d:/etc/mysql/conf.d
        
        environment:
            MYSQL_ROOT_PASSWORD: password
            MYSQL_DATABASE: db1
            MYSQL_USER: db1
            MYSQL_PASSWORD: password
        labels:
            - "com.centurylinklabs.watchtower.enable=true"

Once you’ve added the labels attribute, simply wait for a new image to be released and within 24 hours your container will have been updated, restarted and the old image removed (as long as it’s not used elsewhere).

Storj Storage Node Docker-Compose file

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Category : Docker Compose Files

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Storj V3 is now in BETA and recruiting Storage Node operators. Since V3 of Storj, Docker is used exclusively to wrap up creating a new Storage Node into a simple, manageable container.

You’ll need to see the official docs for creating your identity certificates, but when it comes to creating your docker environment it couldn’t be more simple than using docker-compose. If you haven’t got docker-compose installed then check out this blog post.

Create a new folder and a docker-compose.yml with the below content.

mkdir storj
vi storj/docker-compose.yml
version: '3'
services:
  storagenode:
    image: storjlabs/storagenode:beta
    restart: unless-stopped
    ports:
        - 28967:28967
    volumes:
        - ./config/identity:/app/identity
        - ./data:/app/config
    environment:
        - WALLET=0x123456789
        - EMAIL=EMAIL
        - ADDRESS=external.url:28967
        - BANDWIDTH=10TB
        - STORAGE=1TB
        - STORJ_LOG_LEVEL=info
  watchtower:
    image: containrrr/watchtower
    volumes:
        - /var/run/docker.sock:/var/run/docker.sock
    environment:
        - WATCHTOWER_CLEANUP=true

You’ll need to fill out the environment details to match your requirements, especially the WALLET and ADDRESS. You may want to redirect the volume elements to match your environment – the /app/config path should point to the disk that you’d like to use for storage (I know, the name is confusing) and the /app/identity path should point to your Storj identity certificates.

Run docker-compose up -d to fetch the images from the docker hub and create your Storage Node instance.

Docker Compose yml for Gitlab and Gitlab Runner

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Category : Docker Compose Files

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version: '3.5'
services:
  gitlab:
    image: gitlab/gitlab-ce:latest
    hostname: www.jamescoyle.net
    restart: unless-stopped
    environment:
      GITLAB_OMNIBUS_CONFIG: |
        gitlab_rails['gitlab_shell_ssh_port'] = 8822
    ports:
      - "8000:80"
      - "8822:22"
    volumes:
      - ./config/gitlab:/etc/gitlab
      - ./data/gitlab:/var/opt/gitlab
      - ./logs:/var/log/gitlab
    networks:
      - gitlab

  gitlab-runner:
    image: gitlab/gitlab-runner:alpine
    restart: unless-stopped
    depends_on:
      - gitlab
    volumes:
      - ./config/gitlab-runner:/etc/gitlab-runner
      - /var/run/docker.sock:/var/run/docker.sock
    networks:
      - gitlab

networks:
  gitlab:

Create a new directory and save the above file inside it as docker-compose.yml. You’ll need to replace the field hostname with the external URL that you’ll use to access your Gitlab instance.

mkdir gitlab
vi gitlab\docker-compose.yml

Run docker-compose up -d to fetch the images from the docker hub and create your Gitlab instance. You’ll be able to access Gitlab from a browser on port 8000 and the SSH on port 8822.

Install Docker-Compose

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Category : How-to

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Docker-compose is a utility used to create and manage multiple Docker containers together to form a service. It relies on Docker being installed on the same host so make sure that Docker is installed on your system beforehand. Once you have docker installed and tested you’re ready to begin.

It’s worth noting that docker-compose is often available with your Linux distributions package manager, such as apt or yum but you may find they’re often out of date.

Manually installing docker-compose

Manually installing docker-compose is made easy by the fact that the docker-compose binary is a single file. The process is simple; grab the binary, put it in the right place and make it executable.

In addition to Docker, you’ll need curl installed to download the docker-compose binaries. 

apt install curl
# Or
yum install curl

Once you have curl installed it’s time to install docker-compose. The below link will install the latest ‘stable’ release – if you need a different release you’ll need to check the github page for the version number you require.

Run the below commands to download docker-compose and link the binary to your linux bin directory. 

curl -L "https://github.com/docker/compose/releases/latest/download/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose

Test docker-compose

Finally, to test your docker-compose is working, run the below command to output the version of docker-compose. At the time of writing, the latest version was 1.24.1, but this will move as time goes on. 

docker-compose --version
docker-compose version 1.24.1, build 4667896b

Docker Compose yml for WordPress

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Category : Docker Compose Files

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The below docker-compose yml file will create two Docker containers for running WordPress; a MySQL database and an Apache PHP web server.

version: '3.6'

services:
    db:
        image: mysql:5.7
        container_name: wp_mysql
        volumes:
          - ./data/mysql:/var/lib/mysql
        restart: unless-stopped
        environment:
            MYSQL_ROOT_PASSWORD: [root password]
            MYSQL_DATABASE: wordpress
            MYSQL_USER: wordpress
            MYSQL_PASSWORD: [wp password]
        networks:
            wordpress:

    wordpress:
        image: wordpress:latest
        container_name: wp_web
        depends_on:
            - db
        ports:
            - 8000:80
        restart: unless-stopped
        environment:
            WORDPRESS_DB_HOST: db:3306
            WORDPRESS_DB_USER: wordpress
            WORDPRESS_DB_NAME: wordpress
            WORDPRESS_DB_PASSWORD: [wp password]
        volumes:
            - ./data/wp_content:/var/www/html/wp-content
            - ./config/wordpress/uploads.ini:/usr/local/etc/php/conf.d/uploads.ini
networks:
  wordpress:

Create a new directory and save the above file inside it as docker-compose.yml

mkdir wordpress
vi docker-compose.yml

Run docker-compose up -d to fetch the images from the docker hub and create your WordPress instance. You’ll be able to access WordPress from a browser on port 8000.

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