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Docker.md

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Docker

Install

Debian

  • Set up Docker's apt repository.
# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

# Add the repository to Apt sources:
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update
  • Install the Docker packages.
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
  • You might want to verify if the installation is successful.
sudo docker run hello-world

Ubuntu (and Mint)

  • Set up Docker's apt repository.
# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

# Add the repository to Apt sources (Use UBUNTU_CODENAME instead of VERSION_CODENAME for Mint):
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update
  • Install the Docker packages.
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
  • You might want to verify if the installation is successful.
sudo docker run hello-world

Run Docker without sudo

From this documentation.

sudo groupadd docker
sudo usermod -aG docker $USER
newgrp docker
# Verify that you can run docker commands without sudo.
docker run hello-world

List

docker ps -a # Lists all containers (running and stopped).
docker ps -a -q # Same, but prints only IDs.
docker image ls # Lists all images (downloaded and built).
docker images # Do the same.
docker images ls # Output empty table....  

docker network ls # List the networks.

Stop and remove images

docker stop CONTAINER_(ID or NAME) # Stops an image with a container ID.
docker stop $(docker ps -a -q) # Stops all containers.
docker rm $(docker ps -a -q) # Removes all containers.
docker image remove IMAGE_ID # Removes an image (can be grouped separated with a space).
docker image rm $(docker image ls -a -q) # Removes all images.

docker image remove rails-6 # Un-tags an image (`rails-6` here being the tag targeted).

service docker stop # Stops Docker completely.

Run

docker run --name CONTAINER_NAME IMAGE_(ID or NAME) # Runs an image and set a container name.
# Use `-d` (for detach) in order to run the container up until you ask it to stop.
docker run -d --name CONTAINER_NAME IMAGE_(ID or NAME)

docker exec -it CONTAINER_(ID or NAME) bash # Logs into the terminal of a container.

# `-p` will override the `EXPOSE` command.
docker run -p 3000:3000 rails-6:latest "bash" "-cl" "rails s" # Run a command in your latest image.
# The command above wont work as rails will serve in docker to 127.0.0.1 instead of localhost.
docker run -p 3000:3000 rails-6:latest "bash" "-cl" "rails s -b 0.0.0.0 -p 3000" # This command will fix the issue.

Links

Dockerfile(builder) ref Work over shared volums

Understanding about login-shell in a docker image

About project code into a container

https://hub.docker.com/