mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
c696b95269
Usage: `dockerd-rootless-setuptool.sh install --force` . See `--help` for further information. Co-authored-by: Tianon Gravi <admwiggin@gmail.com> Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
439 lines
11 KiB
Bash
Executable file
439 lines
11 KiB
Bash
Executable file
#!/bin/sh
|
|
# dockerd-rootless-setuptool.sh: setup tool for dockerd-rootless.sh
|
|
# Needs to be executed as a non-root user.
|
|
#
|
|
# Typical usage: dockerd-rootless-setuptool.sh install --force
|
|
#
|
|
# Documentation: https://docs.docker.com/engine/security/rootless/
|
|
set -eu
|
|
|
|
# utility functions
|
|
INFO() {
|
|
/bin/echo -e "\e[104m\e[97m[INFO]\e[49m\e[39m $@"
|
|
}
|
|
|
|
WARNING() {
|
|
/bin/echo >&2 -e "\e[101m\e[97m[WARNING]\e[49m\e[39m $@"
|
|
}
|
|
|
|
ERROR() {
|
|
/bin/echo >&2 -e "\e[101m\e[97m[ERROR]\e[49m\e[39m $@"
|
|
}
|
|
|
|
# constants
|
|
DOCKERD_ROOTLESS_SH="dockerd-rootless.sh"
|
|
SYSTEMD_UNIT="docker.service"
|
|
|
|
# CLI opt: --force
|
|
OPT_FORCE=""
|
|
# CLI opt: --skip-iptables
|
|
OPT_SKIP_IPTABLES=""
|
|
|
|
# global vars
|
|
ARG0="$0"
|
|
DOCKERD_ROOTLESS_SH_FLAGS=""
|
|
BIN=""
|
|
SYSTEMD=""
|
|
CFG_DIR=""
|
|
XDG_RUNTIME_DIR_CREATED=""
|
|
|
|
# run checks and also initialize global vars
|
|
init() {
|
|
# OS verification: Linux only
|
|
case "$(uname)" in
|
|
Linux) ;;
|
|
|
|
*)
|
|
ERROR "Rootless Docker cannot be installed on $(uname)"
|
|
exit 1
|
|
;;
|
|
esac
|
|
|
|
# User verification: deny running as root
|
|
if [ "$(id -u)" = "0" ]; then
|
|
ERROR "Refusing to install rootless Docker as the root user"
|
|
exit 1
|
|
fi
|
|
|
|
# set BIN
|
|
if ! BIN="$(command -v "$DOCKERD_ROOTLESS_SH" 2> /dev/null)"; then
|
|
ERROR "$DOCKERD_ROOTLESS_SH needs to be present under \$PATH"
|
|
exit 1
|
|
fi
|
|
BIN=$(dirname "$BIN")
|
|
|
|
# set SYSTEMD
|
|
if systemctl --user show-environment > /dev/null 2>&1; then
|
|
SYSTEMD=1
|
|
fi
|
|
|
|
# HOME verification
|
|
if [ -z "${HOME:-}" ] || [ ! -d "$HOME" ]; then
|
|
ERROR "HOME needs to be set"
|
|
exit 1
|
|
fi
|
|
if [ ! -w "$HOME" ]; then
|
|
ERROR "HOME needs to be writable"
|
|
exit 1
|
|
fi
|
|
|
|
# set CFG_DIR
|
|
CFG_DIR="${XDG_CONFIG_HOME:-$HOME/.config}"
|
|
|
|
# Existing rootful docker verification
|
|
if [ -w /var/run/docker.sock ] && [ -z "$OPT_FORCE" ]; then
|
|
ERROR "Aborting because rootful Docker (/var/run/docker.sock) is running and accessible. Set --force to ignore."
|
|
exit 1
|
|
fi
|
|
|
|
# Validate XDG_RUNTIME_DIR and set XDG_RUNTIME_DIR_CREATED
|
|
if [ -z "${XDG_RUNTIME_DIR:-}" ] || [ ! -w "$XDG_RUNTIME_DIR" ]; then
|
|
if [ -n "$SYSTEMD" ]; then
|
|
ERROR "Aborting because systemd was detected but XDG_RUNTIME_DIR (\"$XDG_RUNTIME_DIR\") is not set, does not exist, or is not writable"
|
|
ERROR "Hint: this could happen if you changed users with 'su' or 'sudo'. To work around this:"
|
|
ERROR "- try again by first running with root privileges 'loginctl enable-linger <user>' where <user> is the unprivileged user and export XDG_RUNTIME_DIR to the value of RuntimePath as shown by 'loginctl show-user <user>'"
|
|
ERROR "- or simply log back in as the desired unprivileged user (ssh works for remote machines, machinectl shell works for local machines)"
|
|
exit 1
|
|
fi
|
|
export XDG_RUNTIME_DIR="/tmp/docker-$(id -u)"
|
|
mkdir -p "$XDG_RUNTIME_DIR"
|
|
XDG_RUNTIME_DIR_CREATED=1
|
|
fi
|
|
|
|
instructions=""
|
|
# instruction: uidmap dependency check
|
|
if ! command -v newuidmap > /dev/null 2>&1; then
|
|
if command -v apt-get > /dev/null 2>&1; then
|
|
instructions=$(
|
|
cat <<- EOI
|
|
${instructions}
|
|
# Install newuidmap & newgidmap binaries
|
|
apt-get install -y uidmap
|
|
EOI
|
|
)
|
|
elif command -v dnf > /dev/null 2>&1; then
|
|
instructions=$(
|
|
cat <<- EOI
|
|
${instructions}
|
|
# Install newuidmap & newgidmap binaries
|
|
dnf install -y shadow-utils
|
|
EOI
|
|
)
|
|
elif command -v yum > /dev/null 2>&1; then
|
|
instructions=$(
|
|
cat <<- EOI
|
|
${instructions}
|
|
# Install newuidmap & newgidmap binaries
|
|
yum install -y shadow-utils
|
|
EOI
|
|
)
|
|
else
|
|
ERROR "newuidmap binary not found. Please install with a package manager."
|
|
exit 1
|
|
fi
|
|
fi
|
|
|
|
# instruction: iptables dependency check
|
|
faced_iptables_error=""
|
|
if ! command -v iptables > /dev/null 2>&1 && [ ! -f /sbin/iptables ] && [ ! -f /usr/sbin/iptables ]; then
|
|
faced_iptables_error=1
|
|
if [ -z "$OPT_SKIP_IPTABLES" ]; then
|
|
if command -v apt-get > /dev/null 2>&1; then
|
|
instructions=$(
|
|
cat <<- EOI
|
|
${instructions}
|
|
# Install iptables
|
|
apt-get install -y iptables
|
|
EOI
|
|
)
|
|
elif command -v dnf > /dev/null 2>&1; then
|
|
instructions=$(
|
|
cat <<- EOI
|
|
${instructions}
|
|
# Install iptables
|
|
dnf install -y iptables
|
|
EOI
|
|
)
|
|
elif command -v yum > /dev/null 2>&1; then
|
|
instructions=$(
|
|
cat <<- EOI
|
|
${instructions}
|
|
# Install iptables
|
|
yum install -y iptables
|
|
EOI
|
|
)
|
|
else
|
|
ERROR "iptables binary not found. Please install with a package manager."
|
|
exit 1
|
|
fi
|
|
fi
|
|
fi
|
|
|
|
# instruction: ip_tables module dependency check
|
|
if ! grep -q ip_tables /proc/modules 2> /dev/null && ! grep -q ip_tables /lib/modules/$(uname -r)/modules.builtin 2> /dev/null; then
|
|
faced_iptables_error=1
|
|
if [ -z "$OPT_SKIP_IPTABLES" ]; then
|
|
instructions=$(
|
|
cat <<- EOI
|
|
${instructions}
|
|
# Load ip_tables module
|
|
modprobe ip_tables
|
|
EOI
|
|
)
|
|
fi
|
|
fi
|
|
|
|
# set DOCKERD_ROOTLESS_SH_FLAGS
|
|
if [ -n "$faced_iptables_error" ] && [ -n "$OPT_SKIP_IPTABLES" ]; then
|
|
DOCKERD_ROOTLESS_SH_FLAGS="${DOCKERD_ROOTLESS_SH_FLAGS} --iptables=false"
|
|
fi
|
|
|
|
# instruction: Debian and Arch require setting unprivileged_userns_clone
|
|
if [ -f /proc/sys/kernel/unprivileged_userns_clone ]; then
|
|
if [ "1" != "$(cat /proc/sys/kernel/unprivileged_userns_clone)" ]; then
|
|
instructions=$(
|
|
cat <<- EOI
|
|
${instructions}
|
|
# Set kernel.unprivileged_userns_clone
|
|
cat <<EOT > /etc/sysctl.d/50-rootless.conf
|
|
kernel.unprivileged_userns_clone = 1
|
|
EOT
|
|
sysctl --system
|
|
EOI
|
|
)
|
|
fi
|
|
fi
|
|
|
|
# instruction: RHEL/CentOS 7 requires setting max_user_namespaces
|
|
if [ -f /proc/sys/user/max_user_namespaces ]; then
|
|
if [ "0" = "$(cat /proc/sys/user/max_user_namespaces)" ]; then
|
|
instructions=$(
|
|
cat <<- EOI
|
|
${instructions}
|
|
# Set user.max_user_namespaces
|
|
cat <<EOT > /etc/sysctl.d/51-rootless.conf
|
|
user.max_user_namespaces = 28633
|
|
EOT
|
|
sysctl --system
|
|
EOI
|
|
)
|
|
fi
|
|
fi
|
|
|
|
# instructions: validate subuid/subgid files for current user
|
|
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subuid 2> /dev/null; then
|
|
instructions=$(
|
|
cat <<- EOI
|
|
${instructions}
|
|
# Add subuid entry for $(id -un)
|
|
echo "$(id -un):100000:65536" >> /etc/subuid
|
|
EOI
|
|
)
|
|
fi
|
|
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subgid 2> /dev/null; then
|
|
instructions=$(
|
|
cat <<- EOI
|
|
${instructions}
|
|
# Add subgid entry for $(id -un)
|
|
echo "$(id -un):100000:65536" >> /etc/subgid
|
|
EOI
|
|
)
|
|
fi
|
|
|
|
# fail with instructions if requirements are not satisfied.
|
|
if [ -n "$instructions" ]; then
|
|
ERROR "Missing system requirements. Run the following commands to"
|
|
ERROR "install the requirements and run this tool again."
|
|
if [ -n "$faced_iptables_error" ] && [ -z "$OPT_SKIP_IPTABLES" ]; then
|
|
ERROR "Alternatively iptables checks can be disabled with --skip-iptables ."
|
|
fi
|
|
echo
|
|
echo "########## BEGIN ##########"
|
|
echo "sudo sh -eux <<EOF"
|
|
echo "$instructions" | sed -e '/^$/d'
|
|
echo "EOF"
|
|
echo "########## END ##########"
|
|
echo
|
|
exit 1
|
|
fi
|
|
# TODO: support printing non-essential but recommended instructions:
|
|
# - sysctl: "net.ipv4.ping_group_range"
|
|
# - sysctl: "net.ipv4.ip_unprivileged_port_start"
|
|
# - external binary: slirp4netns
|
|
# - external binary: fuse-overlayfs
|
|
}
|
|
|
|
# CLI subcommand: "check"
|
|
cmd_entrypoint_check() {
|
|
# requirements are already checked in init()
|
|
INFO "Requirements are satisfied"
|
|
}
|
|
|
|
# install (systemd)
|
|
install_systemd() {
|
|
mkdir -p "${CFG_DIR}/systemd/user"
|
|
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
|
|
if [ -f "${unit_file}" ]; then
|
|
WARNING "File already exists, skipping: ${unit_file}"
|
|
else
|
|
INFO "Creating ${unit_file}"
|
|
cat <<- EOT > "${unit_file}"
|
|
[Unit]
|
|
Description=Docker Application Container Engine (Rootless)
|
|
Documentation=https://docs.docker.com/engine/security/rootless/
|
|
|
|
[Service]
|
|
Environment=PATH=$BIN:/sbin:/usr/sbin:$PATH
|
|
ExecStart=$BIN/dockerd-rootless.sh $DOCKERD_ROOTLESS_SH_FLAGS
|
|
ExecReload=/bin/kill -s HUP \$MAINPID
|
|
TimeoutSec=0
|
|
RestartSec=2
|
|
Restart=always
|
|
StartLimitBurst=3
|
|
StartLimitInterval=60s
|
|
LimitNOFILE=infinity
|
|
LimitNPROC=infinity
|
|
LimitCORE=infinity
|
|
TasksMax=infinity
|
|
Delegate=yes
|
|
Type=simple
|
|
|
|
[Install]
|
|
WantedBy=default.target
|
|
EOT
|
|
systemctl --user daemon-reload
|
|
fi
|
|
if ! systemctl --user --no-pager status "${SYSTEMD_UNIT}" > /dev/null 2>&1; then
|
|
INFO "starting systemd service ${SYSTEMD_UNIT}"
|
|
(
|
|
set -x
|
|
systemctl --user start "${SYSTEMD_UNIT}"
|
|
sleep 3
|
|
)
|
|
fi
|
|
(
|
|
set -x
|
|
systemctl --user --no-pager --full status "${SYSTEMD_UNIT}"
|
|
DOCKER_HOST="unix://$XDG_RUNTIME_DIR/docker.sock" $BIN/docker version
|
|
systemctl --user enable "${SYSTEMD_UNIT}"
|
|
)
|
|
INFO "Installed ${SYSTEMD_UNIT} successfully."
|
|
INFO "To control ${SYSTEMD_UNIT}, run: \`systemctl --user (start|stop|restart) ${SYSTEMD_UNIT}\`"
|
|
INFO "To run ${SYSTEMD_UNIT} on system startup, run: \`sudo loginctl enable-linger $(id -un)\`"
|
|
echo
|
|
}
|
|
|
|
# install (non-systemd)
|
|
install_nonsystemd() {
|
|
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be started manually:"
|
|
echo
|
|
echo "PATH=$BIN:/sbin:/usr/sbin:\$PATH ${DOCKERD_ROOTLESS_SH} ${DOCKERD_ROOTLESS_SH_FLAGS}"
|
|
echo
|
|
}
|
|
|
|
# CLI subcommand: "install"
|
|
cmd_entrypoint_install() {
|
|
# requirements are already checked in init()
|
|
if [ -z "$SYSTEMD" ]; then
|
|
install_nonsystemd
|
|
else
|
|
install_systemd
|
|
fi
|
|
|
|
INFO "Make sure the following environment variables are set (or add them to ~/.bashrc):"
|
|
echo
|
|
if [ -n "$XDG_RUNTIME_DIR_CREATED" ]; then
|
|
echo "export XDG_RUNTIME_DIR=${XDG_RUNTIME_DIR}"
|
|
fi
|
|
echo "export PATH=${BIN}:\$PATH"
|
|
echo "export DOCKER_HOST=unix://${XDG_RUNTIME_DIR}/docker.sock"
|
|
echo
|
|
|
|
}
|
|
|
|
# CLI subcommand: "uninstall"
|
|
cmd_entrypoint_uninstall() {
|
|
# requirements are already checked in init()
|
|
if [ -z "$SYSTEMD" ]; then
|
|
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be stopped manually:"
|
|
else
|
|
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
|
|
(
|
|
set -x
|
|
systemctl --user stop "${SYSTEMD_UNIT}"
|
|
) || :
|
|
(
|
|
set -x
|
|
systemctl --user disable "${SYSTEMD_UNIT}"
|
|
) || :
|
|
rm -f "${unit_file}"
|
|
INFO "Uninstalled ${SYSTEMD_UNIT}"
|
|
fi
|
|
|
|
INFO "This uninstallation tool does NOT remove Docker binaries and data."
|
|
INFO "To remove data, run: \`$BIN/rootlesskit rm -rf $HOME/.local/share/docker\`"
|
|
}
|
|
|
|
# text for --help
|
|
usage() {
|
|
echo "Usage: ${ARG0} [OPTIONS] COMMAND"
|
|
echo
|
|
echo "A setup tool for Rootless Docker (${DOCKERD_ROOTLESS_SH})."
|
|
echo
|
|
echo "Documentation: https://docs.docker.com/engine/security/rootless/"
|
|
echo
|
|
echo "Options:"
|
|
echo " -f, --force Ignore rootful Docker (/var/run/docker.sock)"
|
|
echo " --skip-iptables Ignore missing iptables"
|
|
echo
|
|
echo "Commands:"
|
|
echo " check Check prerequisites"
|
|
echo " install Install systemd unit (if systemd is available) and show how to manage the service"
|
|
echo " uninstall Uninstall systemd unit"
|
|
}
|
|
|
|
# parse CLI args
|
|
if ! args="$(getopt -o hf --long help,force,skip-iptables -n "$ARG0" -- "$@")"; then
|
|
usage
|
|
exit 1
|
|
fi
|
|
eval set -- "$args"
|
|
while [ "$#" -gt 0 ]; do
|
|
arg="$1"
|
|
shift
|
|
case "$arg" in
|
|
-h | --help)
|
|
usage
|
|
exit 0
|
|
;;
|
|
-f | --force)
|
|
OPT_FORCE=1
|
|
;;
|
|
--skip-iptables)
|
|
OPT_SKIP_IPTABLES=1
|
|
;;
|
|
--)
|
|
break
|
|
;;
|
|
*)
|
|
# XXX this means we missed something in our "getopt" arguments above!
|
|
ERROR "Scripting error, unknown argument '$arg' when parsing script arguments."
|
|
exit 1
|
|
;;
|
|
esac
|
|
done
|
|
|
|
command="${1:-}"
|
|
if [ -z "$command" ]; then
|
|
ERROR "No command was specified. Run with --help to see the usage. Maybe you want to run \`$ARG0 install\`?"
|
|
exit 1
|
|
fi
|
|
|
|
if ! command -v "cmd_entrypoint_${command}" > /dev/null 2>&1; then
|
|
ERROR "Unknown command: ${command}. Run with --help to see the usage."
|
|
exit 1
|
|
fi
|
|
|
|
# main
|
|
init
|
|
"cmd_entrypoint_${command}"
|