94 lines
2.6 KiB
Bash
94 lines
2.6 KiB
Bash
#!/bin/bash
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set -euo pipefail
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# Install Docker Engine on Debian/Ubuntu using Docker's official apt repository.
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# Follows the official docs:
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# https://docs.docker.com/engine/install/debian/
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# https://docs.docker.com/engine/install/ubuntu/
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if [ "$EUID" -ne 0 ]; then
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echo "Please run as root (sudo)." >&2
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exit 1
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fi
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. /etc/os-release
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case "$ID" in
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debian|ubuntu) ;;
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*)
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echo "Unsupported distribution: $ID (only Debian and Ubuntu are supported)." >&2
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exit 1
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;;
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esac
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# Optional override for derivative distros (e.g. Kali, Linux Mint) whose
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# codename doesn't match an official Docker release. Example:
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# DOCKER_CODENAME=trixie ./install-docker.sh
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CODENAME="${DOCKER_CODENAME:-${UBUNTU_CODENAME:-$VERSION_CODENAME}}"
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ARCH="$(dpkg --print-architecture)"
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case "$ARCH" in
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amd64|armhf|arm64|ppc64el|s390x) ;;
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*)
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echo "Unsupported architecture: $ARCH" >&2
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exit 1
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;;
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esac
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export DEBIAN_FRONTEND=noninteractive
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echo "==> Removing conflicting packages (if any)"
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CONFLICTS="$(dpkg --get-selections \
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docker.io docker-compose docker-compose-v2 docker-doc docker-buildx \
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podman-docker containerd runc 2>/dev/null | awk '{print $1}')"
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if [ -n "$CONFLICTS" ]; then
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# shellcheck disable=SC2086
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apt-get remove -y $CONFLICTS
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fi
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echo "==> Installing prerequisites"
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apt-get update
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apt-get install -y ca-certificates curl
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echo "==> Adding Docker's official GPG key"
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install -m 0755 -d /etc/apt/keyrings
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curl -fsSL "https://download.docker.com/linux/$ID/gpg" -o /etc/apt/keyrings/docker.asc
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chmod a+r /etc/apt/keyrings/docker.asc
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echo "==> Adding Docker apt repository"
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tee /etc/apt/sources.list.d/docker.sources >/dev/null <<EOF
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Types: deb
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URIs: https://download.docker.com/linux/$ID
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Suites: $CODENAME
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Components: stable
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Architectures: $ARCH
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Signed-By: /etc/apt/keyrings/docker.asc
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EOF
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echo "==> Installing Docker Engine"
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apt-get update
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apt-get install -y docker-ce docker-ce-cli containerd.io \
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docker-buildx-plugin docker-compose-plugin
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echo "==> Enabling and starting Docker"
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systemctl enable --now docker
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echo "==> Verifying installation"
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if docker run --rm hello-world; then
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echo "hello-world ran successfully."
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else
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echo "Warning: could not run hello-world (check network access to Docker Hub)." >&2
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fi
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# Post-install: let the invoking (non-root) user run docker without sudo
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if [ -n "${SUDO_USER:-}" ] && [ "$SUDO_USER" != "root" ]; then
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usermod -aG docker "$SUDO_USER"
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echo "Added user '$SUDO_USER' to the 'docker' group."
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echo "Log out and back in (or run 'newgrp docker') for the change to take effect."
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fi
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echo
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echo "Docker installed successfully."
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echo "Check version: docker --version"
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echo "Check compose: docker compose version"
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