Docker Basic Setup: Difference between revisions
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Revision as of 10:28, 24 May 2023
Docker Installation Steps
This section we gives fresh (Feb. 2023) references how to install Docker and Docker Compose plugin v.2.x on Ubuntu.
- Docker Docs: Install Docker Engine on Ubuntu >> Uninstall old versions >> Install using the repository
- Docker Docs: Install the Compose plugin >> Install using the repository
- LinuxServer.io Docs: As an additional Docker usage reference and source of plenty of images
Deprecated Docker Installation Steps
#Deprecated Installation Steps
Install Docker
Install Docker on Ubuntu and other Debian based distros.sudo apt install docker.io curl
sudo usermod -aG docker "$USER"
- Stack Overflow: What is docker.io in relation to docker-ce and docker-ee (now called "Mirantis Kubernetes Engine")?
- Collabora.com: The docker.io Debian package is back to life
Install Docker Compose
More information at Get started with Docker Compose.# docker-compose from github.com/docker/compose#where-to-get-docker-compose
sudo curl -L --fail \
https://github.com/docker/compose/releases/download/v2.5.0/docker-compose-linux-x86_64 \
-o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
Alternatively, for example, one can use Docker-compose provided by Linuxserver.io.
#CLI
# docker-compose from linuxserver.io
sudo curl -L --fail \
https://raw.githubusercontent.com/linuxserver/docker-docker-compose/master/run.sh \
-o /usr/local/bin/docker-compose && \
sudo chmod +x /usr/local/bin/docker-compose
Basics Example
Here is a GitHub repository that illustrates at very basic level how to use Dockerfile and docler-compose.yaml to deploy a Node.js application.
- GitHub: Simple task manager
- GitHub: Simple task manager#CLI.md
Miscellaneous
Prune All
Simple script that will prune all Docker containers and images that are not in use. If you want to use it, add the script somewhere in your $PATH to be accessible as shell command and make it executable.
sudo nano /usr/local/bin/docker-prune.sh && sudo chmod +x /usr/local/bin/docker-prune.sh
#!/bin/bash
docker image prune -a
docker container prune
docker images prune
docker system prune
docker volume rm $(docker volume ls -qf dangling=true)
Force update existing images with docker-compose
docker-compose up --force-recreate --build -d
docker image prune -f
- Stack Overflow: How to update existing images with docker-compose?
Log-in to a Docker Container
docker exec -it container(id|name) /bin/bash
Volumes management
docker volume
Usage: docker volume COMMAND
Manage volumes
Commands:
create Create a volume
inspect Display detailed information on one or more volumes
ls List volumes
prune Remove all unused local volumes
rm Remove one or more volumes
Run 'docker volume COMMAND --help' for more information on a command.
docker volume create volume_name
docker volume ls
docker volume inspect volume_name
sudo ls -la /var/lib/docker/volumes/
docker volume (rm|prune) volume_name
Note when you are using docker compose, unless specify path in the left side on the services: container_name: volumes: section docker will automatically create a volume /var/lib/docker/volumes/ named after the container_name underscore _ and the name of the volume.
docker-compose.yml # example 1
version: "3"
services:
container_name:
image: image_name
volumes:
- ./base:/data
The directory used as a volume is "./base" within the current directory where the "docker-compose.yml" is located.
docker-compose.yml # example 1
version: "3"
services:
container_name:
image: image_name
volumes:
- ./base:/data
The directory used as a volume is "./base" within the current directory where the "docker-compose.yml" is located.
Generate Hashed Password for Code-server
printf 'your-password' | npx argon2-cli -e | sed 's/\$/$$/g'
- Code-server GitHub: FAQ – Can I store my password hashed?
Demo App from Nana's Docker Tutorial for Beginners
- TechWorld with Nana: Docker Tutorial for Beginners [FULL COURSE in 3 Hours] (Docker Tutorial for Beginners)
- GitLab of Nana: techworld-js-docker-demo-app
See also
