🎁 Containers

docker run: Creates a new container with a specific image.

<aside> 💡 Example: docker run {image_name}

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• -i: Interactive. Attach the container with the terminal.
• -t: TTY. Attach the host STDIN with the container.
• --rm: Removes the container after its execution
• -d: Detach. Detach the container from the terminal.
• -p: Publish port. Allow us to publish our host ports to the container ports. Also called port-forwarding.
  • We must pass the {host_port}:{container_port} (Example: -p 8080:80)
  • Docker containers run on "the Docker own network", so it's not accesible through our host (by default). That's why we use the -p parameter, publishing one of our host's ports to the container, working as a redirect. We can also set the container to use the host's default network (then every open container port is going to be connected to our host).
• --name: Specifies a name to the container
  • We must pass the desired name (Example: docker run --name mycontainer hello-world)
• -v : Volume. Attach a volume to the container, mirroring a host directory with a directory from the container.
  • The -v can be used to mount and bind a directory to the container, but volumes are a more complex resource. To achieve this kind of goal, you should use the --mount instead.
  • We must pass the full path of the host which we want to mirror to the volume (Example: /home/atreib/Documents/website/) or a volume name
  • We must also provide the full path of the container, where we want to "paste" the volume (Example: /usr/share/nginx/html)
  • Full command example (with full path as the source): docker run -v ~/Documents/website/:/usr/share/nginx/html/ nginx
  • Full command example (with volume name as the source): docker run -v myvolume:/app nginx
  • Attention: This command creates the host directory if it doesn't exist
• --mount: Mount. Mount a directory in the container.
  • We must attach a type, a source and a target, using a key-value and comma-separated string:
    • type: the type of the mount that is going to be made (can be bind || volume)
    • source: The source that is going to be mounted in the target
      • If type's equal to bind: we need to provide the source directory full path
      • If type's equal to volume: we need to provide the source volume's name (see the Volume section)
    • target: the target directory, where we're going to mount our source
  • Example: docker run —-mount type=bind,source=$(pwd)/,target=/usr/share/nginx/html/ nginx
  • Attention: This command DOESN’T create the host directory if it doesn't exist

docker ps: Shows the executing containers

<aside> 💡 Example: docker ps

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• -a: All. Shows all containers (regardless its status)

docker stop: Stops an executing container

<aside> 💡 Example: docker stop {container_name | container_id}

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• To-do

docker start: Starts an stopped container

<aside> 💡 Example: docker start {container_name | container_id}

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• To-do