docker 설치 추가
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#!/usr/bin/env bash
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# shellcheck disable=SC2086
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# Installs Docker Engine on Linux, or shows instructions for macOS/Windows.
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# Docker: https://www.docker.com/
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# OrbStack (macOS alternative): https://orbstack.dev/
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#
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# Supported platforms:
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# Linux (apt) : Ubuntu, Debian, and derivatives — Docker official apt repo
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# Linux (dnf) : RHEL, Fedora, CentOS Stream, Rocky, Alma — Docker official dnf repo
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# macOS : Not supported — shows instructions for OrbStack or Docker Desktop
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# Windows : Not supported — use install-docker.ps1 or Docker Desktop
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#
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# Prerequisites:
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# - Linux: curl, sudo
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# - macOS/Windows: follow the printed instructions
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set -euo pipefail
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# ────────────────────────────────────────────
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# Constants
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# ────────────────────────────────────────────
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DOCKER_GPG_URL="https://download.docker.com/linux/ubuntu/gpg"
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DOCKER_APT_REPO_URL="https://download.docker.com/linux/ubuntu"
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DOCKER_DNF_REPO_URL="https://download.docker.com/linux/rhel/docker-ce.repo"
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# ────────────────────────────────────────────
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# Utility functions (all stderr output)
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# ────────────────────────────────────────────
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info() { echo "[INFO] $*" >&2; }
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warn() { echo "[WARN] $*" >&2; }
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error() {
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echo "[ERROR] $*" >&2
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exit 1
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}
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success() { echo "[OK] $*" >&2; }
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# ────────────────────────────────────────────
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# Detect OS
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# ────────────────────────────────────────────
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OS="$(uname -s)"
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case "$OS" in
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Linux) ;;
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Darwin)
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info "macOS detected. Docker Engine is not installed via this script on macOS."
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info ""
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info "Please install one of the following:"
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info ""
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info " 1. OrbStack (recommended, lightweight):"
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info " https://orbstack.dev/"
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info ""
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info " 2. Docker Desktop for Mac:"
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info " https://www.docker.com/products/docker-desktop/"
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info ""
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exit 0
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;;
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*)
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info "Unsupported OS: $OS. This script only supports Linux."
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info ""
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info "For Windows, install one of the following:"
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info ""
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info " 1. Docker Desktop for Windows:"
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info " https://www.docker.com/products/docker-desktop/"
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info ""
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info " 2. WSL2 with Docker Engine:"
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info " Install WSL2, then run this script inside a WSL2 Linux distro."
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info ""
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exit 0
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;;
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esac
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ARCH="$(uname -m)"
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info "Platform: $OS ($ARCH)"
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# ────────────────────────────────────────────
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# Check prerequisites
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# ────────────────────────────────────────────
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command -v curl &>/dev/null || error "'curl' is required. Install it first."
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command -v sudo &>/dev/null || error "'sudo' is required."
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# ────────────────────────────────────────────
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# Step 1: Check if Docker is already installed
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# ────────────────────────────────────────────
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if command -v docker &>/dev/null; then
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CURRENT_VER="$(docker --version 2>/dev/null || echo 'unknown')"
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info "Docker is already installed ($CURRENT_VER). Skipping installation."
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info "To reinstall or upgrade, uninstall first: sudo apt remove docker-ce docker-ce-cli containerd.io"
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success "Docker is available: $(command -v docker)"
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exit 0
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fi
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# ────────────────────────────────────────────
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# Step 2: Install Docker Engine
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# ────────────────────────────────────────────
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info "Installing Docker Engine..."
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if command -v apt-get &>/dev/null; then
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# ── apt-based systems (Ubuntu, Debian, etc.) ──
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info "Detected apt-based system. Using Docker official apt repository..."
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# Add Docker's official GPG key
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sudo apt-get update -y
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sudo apt-get install -y ca-certificates curl
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sudo install -m 0755 -d /etc/apt/keyrings
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sudo curl -fsSL "$DOCKER_GPG_URL" -o /etc/apt/keyrings/docker.asc
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sudo chmod a+r /etc/apt/keyrings/docker.asc
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# Add the repository to Apt sources
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CODENAME="$(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}")"
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ARCH_DEB="$(dpkg --print-architecture)"
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sudo tee /etc/apt/sources.list.d/docker.sources >/dev/null <<EOF
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Types: deb
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URIs: ${DOCKER_APT_REPO_URL}
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Suites: ${CODENAME}
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Components: stable
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Architectures: ${ARCH_DEB}
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Signed-By: /etc/apt/keyrings/docker.asc
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EOF
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sudo apt-get update -y
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# Install Docker packages
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sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
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success "Docker installed via apt"
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elif command -v dnf &>/dev/null; then
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# ── dnf-based systems (RHEL, Fedora, CentOS Stream, Rocky, Alma) ──
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info "Detected dnf-based system. Using Docker official dnf repository..."
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sudo dnf config-manager --add-repo "$DOCKER_DNF_REPO_URL"
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sudo dnf -y install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
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sudo systemctl --now enable docker
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success "Docker installed via dnf"
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else
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error "No supported package manager found (apt-get or dnf). Install Docker manually: https://docs.docker.com/engine/install/"
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fi
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# ────────────────────────────────────────────
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# Step 3: Add current user to docker group
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# ────────────────────────────────────────────
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info "Adding current user to the docker group..."
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sudo usermod -aG docker "$(whoami)"
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success "User '$(whoami)' added to the docker group"
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info ""
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info "NOTE: Group membership takes effect on next login."
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info " To apply immediately in this session, run: newgrp docker"
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info " Or log out and log back in."
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# ────────────────────────────────────────────
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# Step 4: Verify installation
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# ────────────────────────────────────────────
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if command -v docker &>/dev/null; then
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DOCKER_VER="$(docker --version 2>/dev/null || echo 'unknown')"
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success "Docker is available: $DOCKER_VER"
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else
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# May need a new shell for group changes
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warn "Docker was installed but 'docker' command not found in current PATH."
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warn "Please open a new terminal or run: newgrp docker"
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fi
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# ────────────────────────────────────────────
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# Step 5: Post-install notes
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# ────────────────────────────────────────────
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info ""
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info "=================================================="
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success "Docker installation complete!"
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info "=================================================="
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info ""
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info "Getting started:"
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info " docker run hello-world - Verify installation"
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info " docker ps - List running containers"
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info " docker compose up -d - Start services with Compose"
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info " docker build -t <name> . - Build an image"
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info ""
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info "Post-install steps (optional):"
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info " https://docs.docker.com/engine/install/linux-post-install/"
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info ""
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info "Manage Docker as non-root:"
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info " You have been added to the 'docker' group."
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info " Log out and back in for this to take effect."
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info ""
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info "Container monitoring with ctop:"
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info " Install ctop to monitor containers: install-ctop.sh"
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