182 lines
7.3 KiB
Bash
182 lines
7.3 KiB
Bash
#!/usr/bin/env bash
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#-------------------------------------------------------------------------------------------------------------
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# Copyright (c) Microsoft Corporation. All rights reserved.
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# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
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#-------------------------------------------------------------------------------------------------------------
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#
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# Docs: https://github.com/microsoft/vscode-dev-containers/blob/main/script-library/docs/docker.md
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# Maintainer: The VS Code and Codespaces Teams
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#
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# Syntax: ./docker-debian.sh [enable non-root docker socket access flag] [source socket] [target socket] [non-root user] [use moby]
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ENABLE_NONROOT_DOCKER=${1:-"true"}
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SOURCE_SOCKET=${2:-"/var/run/docker-host.sock"}
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TARGET_SOCKET=${3:-"/var/run/docker.sock"}
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USERNAME=${4:-"automatic"}
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USE_MOBY=${5:-"true"}
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set -e
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if [ "$(id -u)" -ne 0 ]; then
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echo -e 'Script must be run as root. Use sudo, su, or add "USER root" to your Dockerfile before running this script.'
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exit 1
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fi
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# Determine the appropriate non-root user
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if [ "${USERNAME}" = "auto" ] || [ "${USERNAME}" = "automatic" ]; then
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USERNAME=""
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POSSIBLE_USERS=("vscode" "node" "codespace" "$(awk -v val=1000 -F ":" '$3==val{print $1}' /etc/passwd)")
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for CURRENT_USER in ${POSSIBLE_USERS[@]}; do
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if id -u ${CURRENT_USER} > /dev/null 2>&1; then
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USERNAME=${CURRENT_USER}
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break
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fi
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done
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if [ "${USERNAME}" = "" ]; then
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USERNAME=root
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fi
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elif [ "${USERNAME}" = "none" ] || ! id -u ${USERNAME} > /dev/null 2>&1; then
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USERNAME=root
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fi
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# Function to run apt-get if needed
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apt-get-update-if-needed()
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{
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if [ ! -d "/var/lib/apt/lists" ] || [ "$(ls /var/lib/apt/lists/ | wc -l)" = "0" ]; then
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echo "Running apt-get update..."
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apt-get update
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else
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echo "Skipping apt-get update."
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fi
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}
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# Ensure apt is in non-interactive to avoid prompts
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export DEBIAN_FRONTEND=noninteractive
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# Install apt-transport-https, curl, lsb-release, gpg if missing
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if ! dpkg -s apt-transport-https curl ca-certificates lsb-release > /dev/null 2>&1 || ! type gpg > /dev/null 2>&1; then
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apt-get-update-if-needed
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apt-get -y install --no-install-recommends apt-transport-https curl ca-certificates lsb-release gnupg2
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fi
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# Install Docker / Moby CLI if not already installed
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if type docker > /dev/null 2>&1; then
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echo "Docker / Moby CLI already installed."
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else
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if [ "${USE_MOBY}" = "true" ]; then
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DISTRO=$(lsb_release -is | tr '[:upper:]' '[:lower:]')
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CODENAME=$(lsb_release -cs)
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curl -s https://packages.microsoft.com/keys/microsoft.asc | (OUT=$(apt-key add - 2>&1) || echo $OUT)
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echo "deb [arch=amd64] https://packages.microsoft.com/repos/microsoft-${DISTRO}-${CODENAME}-prod ${CODENAME} main" > /etc/apt/sources.list.d/microsoft.list
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apt-get update
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apt-get -y install --no-install-recommends moby-cli moby-buildx
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else
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curl -fsSL https://download.docker.com/linux/$(lsb_release -is | tr '[:upper:]' '[:lower:]')/gpg | (OUT=$(apt-key add - 2>&1) || echo $OUT)
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echo "deb [arch=amd64] https://download.docker.com/linux/$(lsb_release -is | tr '[:upper:]' '[:lower:]') $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list
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apt-get update
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apt-get -y install --no-install-recommends docker-ce-cli
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fi
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fi
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# Install Docker Compose if not already installed
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if type docker-compose > /dev/null 2>&1; then
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echo "Docker Compose already installed."
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else
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LATEST_COMPOSE_VERSION=$(basename "$(curl -fsSL -o /dev/null -w "%{url_effective}" https://github.com/docker/compose/releases/latest)")
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curl -fsSL "https://github.com/docker/compose/releases/download/${LATEST_COMPOSE_VERSION}/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
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chmod +x /usr/local/bin/docker-compose
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fi
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# If init file already exists, exit
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if [ -f "/usr/local/share/docker-init.sh" ]; then
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exit 0
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fi
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# By default, make the source and target sockets the same
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if [ "${SOURCE_SOCKET}" != "${TARGET_SOCKET}" ]; then
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touch "${SOURCE_SOCKET}"
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ln -s "${SOURCE_SOCKET}" "${TARGET_SOCKET}"
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fi
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# Add a stub if not adding non-root user access, user is root
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if [ "${ENABLE_NONROOT_DOCKER}" = "false" ] || [ "${USERNAME}" = "root" ]; then
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echo '/usr/bin/env bash -c "\$@"' > /usr/local/share/docker-init.sh
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chmod +x /usr/local/share/docker-init.sh
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exit 0
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fi
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# If enabling non-root access and specified user is found, setup socat and add script
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chown -h "${USERNAME}":root "${TARGET_SOCKET}"
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if ! dpkg -s socat > /dev/null 2>&1; then
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apt-get-update-if-needed
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apt-get -y install socat
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fi
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tee /usr/local/share/docker-init.sh > /dev/null \
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<< EOF
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#!/usr/bin/env bash
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#-------------------------------------------------------------------------------------------------------------
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# Copyright (c) Microsoft Corporation. All rights reserved.
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# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
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#-------------------------------------------------------------------------------------------------------------
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set -e
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SOCAT_PATH_BASE=/tmp/vscr-docker-from-docker
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SOCAT_LOG=\${SOCAT_PATH_BASE}.log
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SOCAT_PID=\${SOCAT_PATH_BASE}.pid
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# Wrapper function to only use sudo if not already root
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sudoIf()
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{
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if [ "\$(id -u)" -ne 0 ]; then
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sudo "\$@"
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else
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"\$@"
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fi
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}
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# Log messages
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log()
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{
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echo -e "[\$(date)] \$@" | sudoIf tee -a \${SOCAT_LOG} > /dev/null
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}
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echo -e "\n** \$(date) **" | sudoIf tee -a \${SOCAT_LOG} > /dev/null
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log "Ensuring ${USERNAME} has access to ${SOURCE_SOCKET} via ${TARGET_SOCKET}"
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# If enabled, try to add a docker group with the right GID. If the group is root,
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# fall back on using socat to forward the docker socket to another unix socket so
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# that we can set permissions on it without affecting the host.
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if [ "${ENABLE_NONROOT_DOCKER}" = "true" ] && [ "${SOURCE_SOCKET}" != "${TARGET_SOCKET}" ] && [ "${USERNAME}" != "root" ] && [ "${USERNAME}" != "0" ]; then
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SOCKET_GID=\$(stat -c '%g' ${SOURCE_SOCKET})
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if [ "\${SOCKET_GID}" != "0" ]; then
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log "Adding user to group with GID \${SOCKET_GID}."
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if [ "\$(cat /etc/group | grep :\${SOCKET_GID}:)" = "" ]; then
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sudoIf groupadd --gid \${SOCKET_GID} docker-host
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fi
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# Add user to group if not already in it
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if [ "\$(id ${USERNAME} | grep -E "groups.*(=|,)\${SOCKET_GID}\(")" = "" ]; then
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sudoIf usermod -aG \${SOCKET_GID} ${USERNAME}
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fi
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else
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# Enable proxy if not already running
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if [ ! -f "\${SOCAT_PID}" ] || ! ps -p \$(cat \${SOCAT_PID}) > /dev/null; then
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log "Enabling socket proxy."
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log "Proxying ${SOURCE_SOCKET} to ${TARGET_SOCKET} for vscode"
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sudoIf rm -rf ${TARGET_SOCKET}
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(sudoIf socat UNIX-LISTEN:${TARGET_SOCKET},fork,mode=660,user=${USERNAME} UNIX-CONNECT:${SOURCE_SOCKET} 2>&1 | sudoIf tee -a \${SOCAT_LOG} > /dev/null & echo "\$!" | sudoIf tee \${SOCAT_PID} > /dev/null)
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else
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log "Socket proxy already running."
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fi
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fi
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log "Success"
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fi
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# Execute whatever commands were passed in (if any). This allows us
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# to set this script to ENTRYPOINT while still executing the default CMD.
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set +e
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exec "\$@"
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EOF
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chmod +x /usr/local/share/docker-init.sh
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chown ${USERNAME}:root /usr/local/share/docker-init.sh
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echo "Done!" |