118 lines
4.2 KiB
Bash
Executable file
118 lines
4.2 KiB
Bash
Executable file
#!/usr/bin/dumb-init /bin/sh
|
|
# Copyright (c) HashiCorp, Inc.
|
|
# SPDX-License-Identifier: MPL-2.0
|
|
|
|
set -e
|
|
|
|
# Note above that we run dumb-init as PID 1 in order to reap zombie processes
|
|
# as well as forward signals to all processes in its session. Normally, sh
|
|
# wouldn't do either of these functions so we'd leak zombies as well as do
|
|
# unclean termination of all our sub-processes.
|
|
# As of docker 1.13, using docker run --init achieves the same outcome.
|
|
|
|
# You can set CONSUL_BIND_INTERFACE to the name of the interface you'd like to
|
|
# bind to and this will look up the IP and pass the proper -bind= option along
|
|
# to Consul.
|
|
if [ -z "$CONSUL_BIND" ]; then
|
|
if [ -n "$CONSUL_BIND_INTERFACE" ]; then
|
|
CONSUL_BIND_ADDRESS=$(ip -o -4 addr list $CONSUL_BIND_INTERFACE | head -n1 | awk '{print $4}' | cut -d/ -f1)
|
|
if [ -z "$CONSUL_BIND_ADDRESS" ]; then
|
|
echo "Could not find IP for interface '$CONSUL_BIND_INTERFACE', exiting"
|
|
exit 1
|
|
fi
|
|
|
|
CONSUL_BIND="-bind=$CONSUL_BIND_ADDRESS"
|
|
echo "==> Found address '$CONSUL_BIND_ADDRESS' for interface '$CONSUL_BIND_INTERFACE', setting bind option..."
|
|
fi
|
|
fi
|
|
|
|
# You can set CONSUL_CLIENT_INTERFACE to the name of the interface you'd like to
|
|
# bind client intefaces (HTTP, DNS, and RPC) to and this will look up the IP and
|
|
# pass the proper -client= option along to Consul.
|
|
if [ -z "$CONSUL_CLIENT" ]; then
|
|
if [ -n "$CONSUL_CLIENT_INTERFACE" ]; then
|
|
CONSUL_CLIENT_ADDRESS=$(ip -o -4 addr list $CONSUL_CLIENT_INTERFACE | head -n1 | awk '{print $4}' | cut -d/ -f1)
|
|
if [ -z "$CONSUL_CLIENT_ADDRESS" ]; then
|
|
echo "Could not find IP for interface '$CONSUL_CLIENT_INTERFACE', exiting"
|
|
exit 1
|
|
fi
|
|
|
|
CONSUL_CLIENT="-client=$CONSUL_CLIENT_ADDRESS"
|
|
echo "==> Found address '$CONSUL_CLIENT_ADDRESS' for interface '$CONSUL_CLIENT_INTERFACE', setting client option..."
|
|
fi
|
|
fi
|
|
|
|
# CONSUL_DATA_DIR is exposed as a volume for possible persistent storage. The
|
|
# CONSUL_CONFIG_DIR isn't exposed as a volume but you can compose additional
|
|
# config files in there if you use this image as a base, or use CONSUL_LOCAL_CONFIG
|
|
# below.
|
|
if [ -z "$CONSUL_DATA_DIR" ]; then
|
|
CONSUL_DATA_DIR=/consul/data
|
|
fi
|
|
|
|
if [ -z "$CONSUL_CONFIG_DIR" ]; then
|
|
CONSUL_CONFIG_DIR=/consul/config
|
|
fi
|
|
|
|
# You can also set the CONSUL_LOCAL_CONFIG environemnt variable to pass some
|
|
# Consul configuration JSON without having to bind any volumes.
|
|
if [ -n "$CONSUL_LOCAL_CONFIG" ]; then
|
|
echo "$CONSUL_LOCAL_CONFIG" > "$CONSUL_CONFIG_DIR/local.json"
|
|
fi
|
|
|
|
# If the user is trying to run Consul directly with some arguments, then
|
|
# pass them to Consul.
|
|
if [ "${1:0:1}" = '-' ]; then
|
|
set -- consul "$@"
|
|
fi
|
|
|
|
# Look for Consul subcommands.
|
|
if [ "$1" = 'agent' ]; then
|
|
shift
|
|
set -- consul agent \
|
|
-data-dir="$CONSUL_DATA_DIR" \
|
|
-config-dir="$CONSUL_CONFIG_DIR" \
|
|
$CONSUL_BIND \
|
|
$CONSUL_CLIENT \
|
|
"$@"
|
|
elif [ "$1" = 'version' ]; then
|
|
# This needs a special case because there's no help output.
|
|
set -- consul "$@"
|
|
elif consul --help "$1" 2>&1 | grep -q "consul $1"; then
|
|
# We can't use the return code to check for the existence of a subcommand, so
|
|
# we have to use grep to look for a pattern in the help output.
|
|
set -- consul "$@"
|
|
fi
|
|
|
|
# If we are running Consul, make sure it executes as the proper user.
|
|
if [ "$1" = 'consul' -a -z "${CONSUL_DISABLE_PERM_MGMT+x}" ]; then
|
|
# Allow to setup user and group via envrironment
|
|
if [ -z "$CONSUL_UID" ]; then
|
|
CONSUL_UID="$(id -u consul)"
|
|
fi
|
|
|
|
if [ -z "$CONSUL_GID" ]; then
|
|
CONSUL_GID="$(id -g consul)"
|
|
fi
|
|
|
|
# If the data or config dirs are bind mounted then chown them.
|
|
# Note: This checks for root ownership as that's the most common case.
|
|
if [ "$(stat -c %u "$CONSUL_DATA_DIR")" != "${CONSUL_UID}" ]; then
|
|
chown ${CONSUL_UID}:${CONSUL_GID} "$CONSUL_DATA_DIR"
|
|
fi
|
|
if [ "$(stat -c %u "$CONSUL_CONFIG_DIR")" != "${CONSUL_UID}" ]; then
|
|
chown ${CONSUL_UID}:${CONSUL_GID} "$CONSUL_CONFIG_DIR"
|
|
fi
|
|
|
|
# If requested, set the capability to bind to privileged ports before
|
|
# we drop to the non-root user. Note that this doesn't work with all
|
|
# storage drivers (it won't work with AUFS).
|
|
if [ ! -z ${CONSUL_ALLOW_PRIVILEGED_PORTS+x} ]; then
|
|
setcap "cap_net_bind_service=+ep" /bin/consul
|
|
fi
|
|
|
|
set -- su-exec ${CONSUL_UID}:${CONSUL_GID} "$@"
|
|
fi
|
|
|
|
exec "$@"
|