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I'm posting this question here in the hope that I'm just using Docker wrong and someone can explain how to fix it. I don't think the problem is with the headless-wp-starter GitHub project itself, but in case it is I will ask about it somewhere else.

Currently I'm trying to install this to develop locally on Ubuntu 18.10. Here's my installation process. I made sure to delete volumes/images/containers, etc. from my last Docker installation and start from scratch.

  1. I'm trying to install headless-wp-starter, start by installing docker and composer

    sudo apt install composer docker`

  2. Installing docker-compose separately as explained in the Docker Docs here.

  3. Testing docker-compose to see if everything works.

    docker-compose --version  
docker-compose version 1.24.0, build 0aa59064

  4. Move contents of git into a whole new folder located at /opt/lampp/htdocs/headless-wp. 

    cd /opt/lampp/htdocs/headless-wp  
sudo docker-compose up -d

    I need sudo because I get:

    ERROR: Couldn't connect to Docker daemon at http+docker://localhost - is it running?

If it's at a nonstandard location, specify the URL with the DOCKER_HOST environment variable.

  5. Everything works fine until the end where I get:

    Creating db-headless      ... done
Creating frontend-graphql ... done
Creating frontend         ... done
Creating wp-headless      ... error

ERROR: for wp-headless      
Cannot start service wp-headless: OCI runtime create failed:   
container_linux.go:344: starting container process caused "chdir to cwd (\"/var/www/html\") set in config.json failed: 
permission denied": unknown   
ERROR: for wp-headless      
Cannot start service wp-headless: OCI runtime create failed:    
container_linux.go:344: starting container process caused "chdir to cwd (\"/var/www/html\") set in config.json failed: permission denied": unknown      
ERROR: Encountered errors while bringing up the project.

I'm not familiar with Docker at all. I've googled this, but I haven't been able to find a solution.

I've been able to get wp-headless to run by changing this part of docker-compose.yml:

wp-headless:
    build: .
    command: bash -c 'install_wordpress && apache2-foreground'
    container_name: wp-headless
    depends_on:
        - db-headless
    env_file: ./.env
    ports:
        - '8080:8080'
    user: www-data
    volumes:
        - ./wordpress:/var/www/html
        - ./docker/install_wordpress.sh:/usr/local/bin/install_wordpress
        - ./docker/migratedb_import.sh:/usr/local/bin/migratedb_import
        - ./docker/postlightheadlesswpstarter.wordpress.xml:/var/www/postlightheadlesswpstarter.wordpress.xml
        - ./docker/plugins:/var/www/plugins

to 

wp-headless:
    build: .
    command: bash -c 'install_wordpress && apache2-foreground'
    container_name: wp-headless
    depends_on:
        - db-headless
    env_file: ./.env
    ports:
        - '8080:8080'
    user: www-data
    volumes:
        - ./wordpress:/opt/lampp/htdocs/headless-wp
        - ./docker/install_wordpress.sh:/usr/local/bin/install_wordpress
        - ./docker/migratedb_import.sh:/usr/local/bin/migratedb_import
        - ./docker/postlightheadlesswpstarter.wordpress.xml:/var/www/postlightheadlesswpstarter.wordpress.xml
        - ./docker/plugins:/var/www/plugins

Even if WordPress is running, there is no JSON output, so the front-end doesn't work.

Edit: I tried installing Docker by following this post. I also tried extracting git to /var/www/html but I still get the same error:

/var/www/html/headless-wp-starter-master$ sudo docker-compose up -d
db-headless is up-to-date
frontend-graphql is up-to-date
frontend is up-to-date
Starting wp-headless ... error

ERROR: for wp-headless    
Cannot start service wp-headless: OCI runtime create failed:  
container_linux.go:345: starting container process caused "chdir to cwd   (\"/var/www/html\") set in config.json failed: permission denied": unknown
ERROR: for wp-headless    
Cannot start service wp-headless: OCI runtime create failed:  
container_linux.go:345: starting container process caused "chdir to cwd (\"/var/www/html\") set in config.json failed: permission denied": unknown  
ERROR: Encountered errors while bringing up the project.

Link to the full installation log

Questions:

  • Does this installation seem correct or have I made a mistake somewhere?

  • Should I move headless-wp-starter which was downloaded from GitHub to a different folder predetermined by Docker?

  • Am I installing the right version of Docker? There seem to be a lot of versions, and that's also causing confusion.

karel
  • 13,706
Leonardo Petrucci
  • 115

1 Answers1

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The syntax of most bindings in docker and docker-compose is host-item:container-item. So when you do:

    volumes:
        - ./wordpress:/opt/lampp/htdocs/headless-wp

You are binding your local ./wordpress to /opt/lampp/htdocs/headless-wp in the container but nothing points to it in the WP config files. Since the original config is creating a binding between a relative host directory (./wordpress) and the expected directory in the container, you don't need to change this.

xenoid
  • 10,597