docker

Install docker aws ec2

(Depending on the OS you would run different commands, I will be using t3-mini ubuntu from aws)

Setup docker 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:
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
  $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update

Install latest package

sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

Verify installation

sudo docker run hello-world

You should see some output like this:

Remove some service

To completely remove some service from Docker (containers, images, volumes, and networks), follow these steps: (replace service_name with your service, for example kali-linux, appflowy, whatever)

---

1. Stop and remove containers related to "service_name"

docker ps -a --filter "name=SERVICE_NAME" -q | xargs -r docker rm -f

2. Remove images related to SERVICE_NAME

docker images | grep SERVICE_NAME | awk '{print $3}' | xargs -r docker rmi -f

3. Remove volumes related to SERVICE_NAME

docker volume ls | grep SERVICE_NAME | awk '{print $2}' | xargs -r docker volume rm

4. Remove networks related to SERVICE_NAME

docker network ls | grep SERVICE_NAME | awk '{print $1}' | xargs -r docker network rm

---

🔍 Tip: Before executing, you can check what will be removed by running the commands without the last part. Example:

docker images | grep SERVICE_NAME

This will show the images without deleting them.

Favorite commands

Disk space

This command shows the total disk space used by Docker on your EC2 instance, with a breakdown of images, containers, volumes, layers, and any host bind-mounts.

ROOT_DIR="$(docker info -f '{{.DockerRootDir}}' 2>/dev/null || echo /var/lib/docker)"; echo "📦 Docker root: $ROOT_DIR"; echo "🔹 Total:"; sudo du -sh --total "$ROOT_DIR" 2>/dev/null | tail -n1; echo "🔹 Desglose:"; sudo du -sh "$ROOT_DIR/overlay2" "$ROOT_DIR/volumes" "$ROOT_DIR/containers" "$ROOT_DIR/image" 2>/dev/null; echo "🔹 Bind-mounts:"; MAPS=$(docker ps --format '{{.Mounts}}' | tr ',' '\n' | sed -n 's/.*:\(\/[^:]*\):.*/\1/p' | sort -u); [ -n "$MAPS" ] && sudo du -sh $MAPS || echo "No host bind-mounts detected"

Example Output

📦 Docker root: /var/lib/docker
🔹 Total:
4.0G    total
🔹 Desglose:
3.8G    /var/lib/docker/overlay2
113M    /var/lib/docker/volumes
4.4M    /var/lib/docker/containers
21M     /var/lib/docker/image
🔹 Bind-mounts:
No host bind-mounts detected