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#!/usr/bin/env bash
#-------------------------------------------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
#-------------------------------------------------------------------------------------------------------------
#
# Docs: https://github.com/microsoft/vscode-dev-containers/blob/main/script-library/docs/docker.md
# Maintainer: The VS Code and Codespaces Teams
DOCKER_VERSION=${VERSION:-"latest"}
USE_MOBY=${MOBY:-"true"}
DOCKER_DASH_COMPOSE_VERSION=${DOCKERDASHCOMPOSEVERSION:-"v1"} # v1 or v2
ENABLE_NONROOT_DOCKER=${ENABLE_NONROOT_DOCKER:-"true"}
SOURCE_SOCKET=${SOURCE_SOCKET:-"/var/run/docker-host.sock"}
TARGET_SOCKET=${TARGET_SOCKET:-"/var/run/docker.sock"}
USERNAME=${USERNAME:-"automatic"}
MICROSOFT_GPG_KEYS_URI="https://packages.microsoft.com/keys/microsoft.asc"
DOCKER_MOBY_ARCHIVE_VERSION_CODENAMES="buster bullseye bionic focal jammy"
DOCKER_LICENSED_ARCHIVE_VERSION_CODENAMES="buster bullseye bionic focal hirsute impish jammy"
set -e
# Clean up
rm -rf /var/lib/apt/lists/*
if [ "$(id -u)" -ne 0 ]; then
echo -e 'Script must be run as root. Use sudo, su, or add "USER root" to your Dockerfile before running this script.'
exit 1
fi
# Determine the appropriate non-root user
if [ "${USERNAME}" = "auto" ] || [ "${USERNAME}" = "automatic" ]; then
USERNAME=""
POSSIBLE_USERS=("vscode" "node" "codespace" "$(awk -v val=1000 -F ":" '$3==val{print $1}' /etc/passwd)")
for CURRENT_USER in "${POSSIBLE_USERS[@]}"; do
if id -u ${CURRENT_USER} > /dev/null 2>&1; then
USERNAME=${CURRENT_USER}
break
fi
done
if [ "${USERNAME}" = "" ]; then
USERNAME=root
fi
elif [ "${USERNAME}" = "none" ] || ! id -u ${USERNAME} > /dev/null 2>&1; then
USERNAME=root
fi
# Get central common setting
get_common_setting() {
if [ "${common_settings_file_loaded}" != "true" ]; then
curl -sfL "https://aka.ms/vscode-dev-containers/script-library/settings.env" 2>/dev/null -o /tmp/vsdc-settings.env || echo "Could not download settings file. Skipping."
common_settings_file_loaded=true
fi
if [ -f "/tmp/vsdc-settings.env" ]; then
local multi_line=""
if [ "$2" = "true" ]; then multi_line="-z"; fi
local result="$(grep ${multi_line} -oP "$1=\"?\K[^\"]+" /tmp/vsdc-settings.env | tr -d '\0')"
if [ ! -z "${result}" ]; then declare -g $1="${result}"; fi
fi
echo "$1=${!1}"
}
apt_get_update()
{
if [ "$(find /var/lib/apt/lists/* | wc -l)" = "0" ]; then
echo "Running apt-get update..."
apt-get update -y
fi
}
# Checks if packages are installed and installs them if not
check_packages() {
if ! dpkg -s "$@" > /dev/null 2>&1; then
apt_get_update
apt-get -y install --no-install-recommends "$@"
fi
}
# Figure out correct version of a three part version number is not passed
find_version_from_git_tags() {
local variable_name=$1
local requested_version=${!variable_name}
if [ "${requested_version}" = "none" ]; then return; fi
local repository=$2
local prefix=${3:-"tags/v"}
local separator=${4:-"."}
local last_part_optional=${5:-"false"}
if [ "$(echo "${requested_version}" | grep -o "." | wc -l)" != "2" ]; then
local escaped_separator=${separator//./\\.}
local last_part
if [ "${last_part_optional}" = "true" ]; then
last_part="(${escaped_separator}[0-9]+)?"
else
last_part="${escaped_separator}[0-9]+"
fi
local regex="${prefix}\\K[0-9]+${escaped_separator}[0-9]+${last_part}$"
local version_list="$(git ls-remote --tags ${repository} | grep -oP "${regex}" | tr -d ' ' | tr "${separator}" "." | sort -rV)"
if [ "${requested_version}" = "latest" ] || [ "${requested_version}" = "current" ] || [ "${requested_version}" = "lts" ]; then
declare -g ${variable_name}="$(echo "${version_list}" | head -n 1)"
else
set +e
declare -g ${variable_name}="$(echo "${version_list}" | grep -E -m 1 "^${requested_version//./\\.}([\\.\\s]|$)")"
set -e
fi
fi
if [ -z "${!variable_name}" ] || ! echo "${version_list}" | grep "^${!variable_name//./\\.}$" > /dev/null 2>&1; then
echo -e "Invalid ${variable_name} value: ${requested_version}\nValid values:\n${version_list}" >&2
exit 1
fi
echo "${variable_name}=${!variable_name}"
}
# Ensure apt is in non-interactive to avoid prompts
export DEBIAN_FRONTEND=noninteractive
# Install dependencies
check_packages apt-transport-https curl ca-certificates gnupg2 dirmngr
if ! type git > /dev/null 2>&1; then
check_packages git
fi
# Source /etc/os-release to get OS info
. /etc/os-release
# Fetch host/container arch.
architecture="$(dpkg --print-architecture)"
# Check if distro is suppported
if [ "${USE_MOBY}" = "true" ]; then
# 'get_common_setting' allows attribute to be updated remotely
get_common_setting DOCKER_MOBY_ARCHIVE_VERSION_CODENAMES
if [[ "${DOCKER_MOBY_ARCHIVE_VERSION_CODENAMES}" != *"${VERSION_CODENAME}"* ]]; then
err "Unsupported distribution version '${VERSION_CODENAME}'. To resolve, either: (1) set feature option '\"moby\": false' , or (2) choose a compatible OS distribution"
err "Support distributions include: ${DOCKER_MOBY_ARCHIVE_VERSION_CODENAMES}"
exit 1
fi
echo "Distro codename '${VERSION_CODENAME}' matched filter '${DOCKER_MOBY_ARCHIVE_VERSION_CODENAMES}'"
else
get_common_setting DOCKER_LICENSED_ARCHIVE_VERSION_CODENAMES
if [[ "${DOCKER_LICENSED_ARCHIVE_VERSION_CODENAMES}" != *"${VERSION_CODENAME}"* ]]; then
err "Unsupported distribution version '${VERSION_CODENAME}'. To resolve, please choose a compatible OS distribution"
err "Support distributions include: ${DOCKER_LICENSED_ARCHIVE_VERSION_CODENAMES}"
exit 1
fi
echo "Distro codename '${VERSION_CODENAME}' matched filter '${DOCKER_LICENSED_ARCHIVE_VERSION_CODENAMES}'"
fi
# Set up the necessary apt repos (either Microsoft's or Docker's)
if [ "${USE_MOBY}" = "true" ]; then
cli_package_name="moby-cli"
# Import key safely and import Microsoft apt repo
get_common_setting MICROSOFT_GPG_KEYS_URI
curl -sSL ${MICROSOFT_GPG_KEYS_URI} | gpg --dearmor > /usr/share/keyrings/microsoft-archive-keyring.gpg
echo "deb [arch=${architecture} signed-by=/usr/share/keyrings/microsoft-archive-keyring.gpg] https://packages.microsoft.com/repos/microsoft-${ID}-${VERSION_CODENAME}-prod ${VERSION_CODENAME} main" > /etc/apt/sources.list.d/microsoft.list
else
# Name of proprietary engine package
cli_package_name="docker-ce-cli"
# Import key safely and import Docker apt repo
curl -fsSL https://download.docker.com/linux/${ID}/gpg | gpg --dearmor > /usr/share/keyrings/docker-archive-keyring.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/${ID} ${VERSION_CODENAME} stable" > /etc/apt/sources.list.d/docker.list
fi
# Refresh apt lists
apt-get update
# Soft version matching for CLI
if [ "${DOCKER_VERSION}" = "latest" ] || [ "${DOCKER_VERSION}" = "lts" ] || [ "${DOCKER_VERSION}" = "stable" ]; then
# Empty, meaning grab whatever "latest" is in apt repo
cli_version_suffix=""
else
# Fetch a valid version from the apt-cache (eg: the Microsoft repo appends +azure, breakfix, etc...)
docker_version_dot_escaped="${DOCKER_VERSION//./\\.}"
docker_version_dot_plus_escaped="${docker_version_dot_escaped//+/\\+}"
# Regex needs to handle debian package version number format: https://www.systutorials.com/docs/linux/man/5-deb-version/
docker_version_regex="^(.+:)?${docker_version_dot_plus_escaped}([\\.\\+ ~:-]|$)"
set +e # Don't exit if finding version fails - will handle gracefully
cli_version_suffix="=$(apt-cache madison ${cli_package_name} | awk -F"|" '{print $2}' | sed -e 's/^[ \t]*//' | grep -E -m 1 "${docker_version_regex}")"
set -e
if [ -z "${cli_version_suffix}" ] || [ "${cli_version_suffix}" = "=" ]; then
echo "(!) No full or partial Docker / Moby version match found for \"${DOCKER_VERSION}\" on OS ${ID} ${VERSION_CODENAME} (${architecture}). Available versions:"
apt-cache madison ${cli_package_name} | awk -F"|" '{print $2}' | grep -oP '^(.+:)?\K.+'
exit 1
fi
echo "cli_version_suffix ${cli_version_suffix}"
fi
# Install Docker / Moby CLI if not already installed
if type docker > /dev/null 2>&1; then
echo "Docker / Moby CLI already installed."
else
if [ "${USE_MOBY}" = "true" ]; then
apt-get -y install --no-install-recommends moby-cli${cli_version_suffix} moby-buildx
apt-get -y install --no-install-recommends moby-compose || echo "(*) Package moby-compose (Docker Compose v2) not available for OS ${ID} ${VERSION_CODENAME} (${architecture}). Skipping."
else
apt-get -y install --no-install-recommends docker-ce-cli${cli_version_suffix}
fi
fi
# Install Docker Compose if not already installed and is on a supported architecture
if type docker-compose > /dev/null 2>&1; then
echo "Docker Compose already installed."
else
TARGET_COMPOSE_ARCH="$(uname -m)"
if [ "${TARGET_COMPOSE_ARCH}" = "amd64" ]; then
TARGET_COMPOSE_ARCH="x86_64"
fi
if [ "${TARGET_COMPOSE_ARCH}" != "x86_64" ]; then
# Use pip to get a version that runns on this architecture
check_packages python3-minimal python3-pip libffi-dev python3-venv
export PIPX_HOME=/usr/local/pipx
mkdir -p ${PIPX_HOME}
export PIPX_BIN_DIR=/usr/local/bin
export PYTHONUSERBASE=/tmp/pip-tmp
export PIP_CACHE_DIR=/tmp/pip-tmp/cache
pipx_bin=pipx
if ! type pipx > /dev/null 2>&1; then
pip3 install --disable-pip-version-check --no-cache-dir --user pipx
pipx_bin=/tmp/pip-tmp/bin/pipx
fi
${pipx_bin} install --pip-args '--no-cache-dir --force-reinstall' docker-compose
rm -rf /tmp/pip-tmp
else
compose_v1_version="1"
find_version_from_git_tags compose_v1_version "https://github.com/docker/compose" "tags/"
echo "(*) Installing docker-compose ${compose_v1_version}..."
curl -fsSL "https://github.com/docker/compose/releases/download/${compose_v1_version}/docker-compose-Linux-x86_64" -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose
fi
fi
# Install docker-compose switch if not already installed - https://github.com/docker/compose-switch#manual-installation
current_v1_compose_path="$(which docker-compose)"
target_v1_compose_path="$(dirname "${current_v1_compose_path}")/docker-compose-v1"
if ! type compose-switch > /dev/null 2>&1; then
echo "(*) Installing compose-switch..."
compose_switch_version="latest"
find_version_from_git_tags compose_switch_version "https://github.com/docker/compose-switch"
curl -fsSL "https://github.com/docker/compose-switch/releases/download/v${compose_switch_version}/docker-compose-linux-${architecture}" -o /usr/local/bin/compose-switch
chmod +x /usr/local/bin/compose-switch
# TODO: Verify checksum once available: https://github.com/docker/compose-switch/issues/11
# Setup v1 CLI as alternative in addition to compose-switch (which maps to v2)
mv "${current_v1_compose_path}" "${target_v1_compose_path}"
update-alternatives --install /usr/local/bin/docker-compose docker-compose /usr/local/bin/compose-switch 99
update-alternatives --install /usr/local/bin/docker-compose docker-compose "${target_v1_compose_path}" 1
fi
if [ "${DOCKER_DASH_COMPOSE_VERSION}" = "v1" ]; then
update-alternatives --set docker-compose "${target_v1_compose_path}"
else
update-alternatives --set docker-compose /usr/local/bin/compose-switch
fi
# If init file already exists, exit
if [ -f "/usr/local/share/docker-init.sh" ]; then
# Clean up
rm -rf /var/lib/apt/lists/*
exit 0
fi
echo "docker-init doesnt exist, adding..."
# By default, make the source and target sockets the same
if [ "${SOURCE_SOCKET}" != "${TARGET_SOCKET}" ]; then
touch "${SOURCE_SOCKET}"
ln -s "${SOURCE_SOCKET}" "${TARGET_SOCKET}"
fi
# Add a stub if not adding non-root user access, user is root
if [ "${ENABLE_NONROOT_DOCKER}" = "false" ] || [ "${USERNAME}" = "root" ]; then
echo -e '#!/usr/bin/env bash\nexec "$@"' > /usr/local/share/docker-init.sh
chmod +x /usr/local/share/docker-init.sh
# Clean up
rm -rf /var/lib/apt/lists/*
exit 0
fi
# Setup a docker group in the event the docker socket's group is not root
if ! grep -qE '^docker:' /etc/group; then
groupadd --system docker
fi
usermod -aG docker "${USERNAME}"
DOCKER_GID="$(grep -oP '^docker:x:\K[^:]+' /etc/group)"
# If enabling non-root access and specified user is found, setup socat and add script
chown -h "${USERNAME}":root "${TARGET_SOCKET}"
check_packages socat
tee /usr/local/share/docker-init.sh > /dev/null \
<< EOF
#!/usr/bin/env bash
#-------------------------------------------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
#-------------------------------------------------------------------------------------------------------------
set -e
SOCAT_PATH_BASE=/tmp/vscr-docker-from-docker
SOCAT_LOG=\${SOCAT_PATH_BASE}.log
SOCAT_PID=\${SOCAT_PATH_BASE}.pid
# Wrapper function to only use sudo if not already root
sudoIf()
{
if [ "\$(id -u)" -ne 0 ]; then
sudo "\$@"
else
"\$@"
fi
}
# Log messages
log()
{
echo -e "[\$(date)] \$@" | sudoIf tee -a \${SOCAT_LOG} > /dev/null
}
echo -e "\n** \$(date) **" | sudoIf tee -a \${SOCAT_LOG} > /dev/null
log "Ensuring ${USERNAME} has access to ${SOURCE_SOCKET} via ${TARGET_SOCKET}"
# If enabled, try to update the docker group with the right GID. If the group is root,
# fall back on using socat to forward the docker socket to another unix socket so
# that we can set permissions on it without affecting the host.
if [ "${ENABLE_NONROOT_DOCKER}" = "true" ] && [ "${SOURCE_SOCKET}" != "${TARGET_SOCKET}" ] && [ "${USERNAME}" != "root" ] && [ "${USERNAME}" != "0" ]; then
SOCKET_GID=\$(stat -c '%g' ${SOURCE_SOCKET})
if [ "\${SOCKET_GID}" != "0" ] && [ "\${SOCKET_GID}" != "${DOCKER_GID}" ] && ! grep -E ".+:x:\${SOCKET_GID}" /etc/group; then
sudoIf groupmod --gid "\${SOCKET_GID}" docker
else
# Enable proxy if not already running
if [ ! -f "\${SOCAT_PID}" ] || ! ps -p \$(cat \${SOCAT_PID}) > /dev/null; then
log "Enabling socket proxy."
log "Proxying ${SOURCE_SOCKET} to ${TARGET_SOCKET} for vscode"
sudoIf rm -rf ${TARGET_SOCKET}
(sudoIf socat UNIX-LISTEN:${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)
else
log "Socket proxy already running."
fi
fi
log "Success"
fi
# Execute whatever commands were passed in (if any). This allows us
# to set this script to ENTRYPOINT while still executing the default CMD.
set +e
exec "\$@"
EOF
chmod +x /usr/local/share/docker-init.sh
chown ${USERNAME}:root /usr/local/share/docker-init.sh
# Clean up
rm -rf /var/lib/apt/lists/*
echo "Done!"
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