Commands

1. Official Docker reference documentation
   https://docs.docker.com/reference/

2. Docker registry commands

    docker pull ubuntu
    docker push jasonmccb/drives_bash_sync
   

3. Docker image commands

    # Listing
    docker images
   
    # Removing
    docker rmi <image-name>
    docker rmi $(docker images -q -f dangling=true)
   
    # Building using "docker build"
    docker build -t <image name[:image tag]> <dockerfile dir>
    # -f option
    docker build -t image-name -f folder_name/Dockerfile .
    # Building using "docker-compose" ("up" will build/create and run)
    docker-compose up -d
    # To rebuild after changed
    docker-compose build
   

4. Docker container commands

    # Listing
    docker ps -a
    # Show all details
    docker inspect <container id>
    # Only show bind mounts
    docker inspect -f "{ { .Mounts }}" <container id>
   	
    # Running a new container
    docker run <image name>
    # -d runs from background, -it runs interactively, -v mounts volume, -w for working dir
    docker run -v "D:/programming/Docker container/sharing:/root" -w /root -it my-wsl-sync
    # Running from docker-compose, the "app" service in a shell
    docker-compose exec app sh
   	
    # Managing existing container
    docker start/stop/kill/rm <container id>
   	
    # Checking log
    docker logs <container id>
   

Issues

1. Cannot find package

   docker run ... -c "yarn install && yarn run env"
   ...
   yarn run v1.22.4
   error Couldn't find a package.json file in "/app"
   

   Solution: cd "xxxx/app"

2. Executable file not found in $PATH

   docker run -it ubuntu -v "D:/programming/Docker container/sharing:/root"
   docker: Error response from daemon: OCI runtime create failed: container_linux.go:349: starting container process caused "exec: \"-v\": executable file not found in $PATH": unknown.
   

   Solution: docker run -v "D:/programming/Docker container/sharing:/root" -it ubuntu

3. COPY failed
   Dockerfile: COPY ../sharing/myWSLSync.sh /tmp/

   docker build -t my-wsl-sync folder_name
   Step 2/2 : COPY sharing/myWSLSync.sh /tmp/
   COPY failed: stat /var/lib/docker/tmp/docker-builder764373298/sharing/myWSLSync.sh: no such file or directory
   

   Solution: don’t use “..”, and use “-f”
   docker build -t my-wsl-sync -f folder_name/Dockerfile .

4. Warning on non-Windows host

   SECURITY WARNING: You are building a Docker image from Windows against a non-Windows Docker host. All files and directories added to build context will have '-rwxr-xr-x' permissions. It is recommended to double check and reset permissions for sensitive files and directories.
   

   Solution: Because folders will become files, we should not copy folders from Windows to Linux image, we should only copy files. And also our program should not rely on the permissions of files and folders.

Example

I’ve written an example of Bash program in Docker:
https://github.com/jasonmccb/drives_bash_sync