Install Docker Official
Uninstall old versions:
for pkg in docker.io docker-doc docker-compose docker-compose-v2 podman-docker containerd runc; do sudo apt-get remove $pkg; done
Install from apt repo:
# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl gnupg
sudo install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpg
# Add the repository to Apt sources:
echo \
"deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] 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 Docker Packages:
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
Setup Docker
Traefik setup example
Guide For setting up Traefik Install latest docker-ce:
- sudo apt install docker-ce
Start the docker service and enable it to launch everytime at system boot.
- systemctl start docker
- systemctl enable docker
Check version of docker:
- docker version
Additional: Running Docker for non-root user Docker container can be run under the non-root user. We just need to add the user to the docker group.
Add 'aleks' user.
- useradd -m -s /bin/bash aleks
Now add the 'aleks' user to the docker group, then restart the docker service.
- usermod -a -G docker aleks
- systemctl restart docker
Test by running the docker hello-world.
- docker run -it hello-world
Install Docker Compose
- sudo apt install docker-compose
Check version:
- docker-compose version
Create Custom Docker Network
Check the available docker network on the system.
- docker network ls
Docker Commands
Docker commands reference can be found here: docker command ref
Stop docker container
- docker stop <container name>
remove container
- docker rm <container name>
run container
- docker run --name <container name>
Stop all the containers
- docker stop $(docker ps -a -q)
Remove all the containers
- docker rm $(docker ps -a -q)
When running docker containers the run command will require extra options for containers with specific uses. Environment vairables can be added to a document container on startup using a .env file and the switch "--env-file=<path to env file>" in the run command
Docker High CPU usage
See what containers are using system resources:
- docker stats --all
- docker stats --all --format "table Template:.ID\tTemplate:.Name\tTemplate:.CPUPerc\tTemplate:.MemUsage"
Check specific container for process:
- docker ps | grep <container id>
Check the logs for high cpu use container:
- docker logs --tail 100 <container Id>
Follow live logs:
- docker logs --follow <container ID>
restart docker container
- docker restart <container name>
Template docker-compose file
Also see some other templates:awesome-compose github