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emqx
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emqx/bin/emqx

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#!/usr/bin/env bash
# -*- tab-width:4;indent-tabs-mode:nil -*-
# ex: ts=4 sw=4 et
set -euo pipefail
DEBUG="${DEBUG:-0}"
if [ "$DEBUG" -eq 1 ]; then
set -x
fi
if [ "$DEBUG" -eq 2 ]; then
set -x
export PS4='+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
fi
logerr() {
if [ "${TERM:-dumb}" = dumb ]; then
echo -e "ERROR: $*" 1>&2
else
echo -e "$(tput setaf 1)ERROR: $*$(tput sgr0)" 1>&2
fi
}
logwarn() {
if [ "${TERM:-dumb}" = dumb ]; then
echo "WARNING: $*"
else
echo "$(tput setaf 3)WARNING: $*$(tput sgr0)"
fi
}
logdebug() {
if [ "$DEBUG" -eq 1 ]; then
echo "DEBUG: $*"
fi
}
die() {
set +x
logerr "$1"
errno=${2:-1}
exit "$errno"
}
# We need to find real directory with emqx files on all platforms
# even when bin/emqx is symlinked on several levels
# - readlink -f works perfectly, but `-f` flag has completely different meaning in BSD version,
# so we can't use it universally.
# - `stat -f%R` on MacOS does exactly what `readlink -f` does on Linux, but we can't use it
# as a universal solution either because GNU stat has different syntax and this argument is invalid.
# Also, version of stat which supports this syntax is only available since MacOS 12
if [ "$(uname -s)" == 'Darwin' ]; then
product_version="$(sw_vers -productVersion | cut -d '.' -f 1)"
if [ "$product_version" -ge 12 ]; then
# if homebrew coreutils package is installed, GNU version of stat can take precedence,
# so we use absolute path to ensure we are calling MacOS default
RUNNER_ROOT_DIR="$(cd "$(dirname "$(/usr/bin/stat -f%R "$0" || echo "$0")")"/..; pwd -P)"
else
# try our best to resolve link on MacOS <= 11
RUNNER_ROOT_DIR="$(cd "$(dirname "$(readlink "$0" || echo "$0")")"/..; pwd -P)"
fi
else
RUNNER_ROOT_DIR="$(cd "$(dirname "$(realpath "$0" || echo "$0")")"/..; pwd -P)"
fi
BASE_RUNNER_ROOT_DIR="${BASE_RUNNER_ROOT_DIR:-$RUNNER_ROOT_DIR}"
if [ -f "$RUNNER_ROOT_DIR/relup/version" ]; then
TARGET_VSN=$(cat "$RUNNER_ROOT_DIR/relup/version")
export BASE_RUNNER_ROOT_DIR
logwarn "Loading emqx from hot upgrade dir: $RUNNER_ROOT_DIR/relup"
exec "$RUNNER_ROOT_DIR"/relup/"$TARGET_VSN"/bin/emqx "$@"
else
logdebug "Loading emqx from $RUNNER_ROOT_DIR"
fi
# shellcheck disable=SC1090,SC1091
. "$RUNNER_ROOT_DIR"/releases/emqx_vars
# defined in emqx_vars
export RUNNER_ROOT_DIR
export EMQX_ETC_DIR
export REL_VSN
export SCHEMA_MOD
export IS_ENTERPRISE
RUNNER_SCRIPT="$RUNNER_BIN_DIR/$REL_NAME"
CODE_LOADING_MODE="${CODE_LOADING_MODE:-embedded}"
REL_DIR="$RUNNER_ROOT_DIR/releases/$REL_VSN"
WHOAMI=$(whoami 2>/dev/null || id -u)
# hocon try to read environment variables starting with "EMQX_"
export HOCON_ENV_OVERRIDE_PREFIX='EMQX_'
export ERTS_DIR="$RUNNER_ROOT_DIR/erts-$ERTS_VSN"
export BINDIR="$ERTS_DIR/bin"
export EMU="beam"
export PROGNAME="erl"
export ERTS_LIB_DIR="$RUNNER_ROOT_DIR/lib"
DYNLIBS_DIR="$RUNNER_ROOT_DIR/dynlibs"
assert_node_alive() {
if ! relx_nodetool "ping" > /dev/null; then
exit 1
fi
}
usage() {
local command="$1"
case "$command" in
start)
echo "Start EMQX service in daemon mode"
;;
stop)
echo "Stop the running EMQX program"
;;
console)
echo "Boot up EMQX service in an interactive Erlang or Elixir shell"
echo "This command needs a tty"
;;
console_clean)
echo "This command does NOT boot up the EMQX service"
echo "It only starts an interactive Erlang or Elixir console with all the"
echo "EMQX code available"
;;
foreground)
echo "Start EMQX in foreground mode without an interactive shell"
;;
pid)
echo "Print out EMQX process identifier"
;;
ping)
echo "Check if the EMQX node is up and running"
echo "This command exit with 0 silently if node is running"
;;
escript)
echo "Execute a escript using the Erlang runtime from EMQX package installation"
echo "For example $REL_NAME escript /path/to/my/escript my_arg1 my_arg2"
;;
attach)
echo "This command is applicable when EMQX is started in daemon mode."
echo "It attaches the current shell to EMQX's control console"
echo "through a named pipe."
logwarn "try to use the safer alternative, remote_console command."
;;
remote_console)
echo "Start an interactive shell running an Erlang or Elixir node which "
echo "hidden-connects to the running EMQX node".
echo "This command is mostly used for troubleshooting."
;;
ertspath)
echo "Print path to Erlang runtime bin dir"
;;
rpc)
echo "Usage: $REL_NAME rpc MODULE FUNCTION [ARGS, ...]"
echo "Connect to the EMQX node and make an Erlang RPC"
echo "This command blocks for at most 60 seconds."
echo "It exits with non-zero code in case of any RPC failure"
echo "including connection error and runtime exception"
;;
rpcterms)
echo "Usage: $REL_NAME rpcterms MODULE FUNCTION [ARGS, ...]"
echo "Connect to the EMQX node and make an Erlang RPC"
echo "The result of the RPC call is pretty-printed as an "
echo "Erlang term"
;;
root_dir)
echo "Print EMQX installation root dir"
;;
eval)
echo "Evaluate an Erlang expression in the EMQX node."
;;
eval-ex)
echo "Evaluate an Elixir expression in the EMQX node. Only applies to Elixir node"
;;
versions)
echo "List installed EMQX release versions and their status"
;;
unpack)
echo "Usage: $REL_NAME unpack [VERSION]"
echo "Unpacks a release package VERSION, it assumes that this"
echo "release package tarball has already been deployed at one"
echo "of the following locations:"
echo " releases/<relname>-<version>.tar.gz"
;;
install)
echo "Usage: $REL_NAME install [VERSION]"
echo "Installs a release package VERSION, it assumes that this"
echo "release package tarball has already been deployed at one"
echo "of the following locations:"
echo " releases/<relname>-<version>.tar.gz"
echo ""
echo " --no-permanent Install release package VERSION but"
echo " don't make it permanent"
;;
uninstall)
echo "Usage: $REL_NAME uninstall [VERSION]"
echo "Uninstalls a release VERSION, it will only accept"
echo "versions that are not currently in use"
;;
upgrade)
echo "Usage: $REL_NAME upgrade [VERSION]"
echo "Upgrades the currently running release to VERSION, it assumes"
echo "that a release package tarball has already been deployed at one"
echo "of the following locations:"
echo " releases/<relname>-<version>.tar.gz"
echo ""
echo " --no-permanent Install release package VERSION but"
echo " don't make it permanent"
;;
downgrade)
echo "Usage: $REL_NAME downgrade [VERSION]"
echo "Downgrades the currently running release to VERSION, it assumes"
echo "that a release package tarball has already been deployed at one"
echo "of the following locations:"
echo " releases/<relname>-<version>.tar.gz"
echo ""
echo " --no-permanent Install release package VERSION but"
echo " don't make it permanent"
;;
check_config)
echo "Checks the EMQX config without generating any files"
;;
*)
echo "Usage: $REL_NAME COMMAND [help]"
echo ''
echo "Commonly used COMMANDs:"
echo " start: Start EMQX in daemon mode"
echo " console: Start EMQX in an interactive Erlang or Elixir shell"
echo " foreground: Start EMQX in foreground mode without an interactive shell"
echo " stop: Stop the running EMQX node"
echo " ctl: Administration commands, execute '$REL_NAME ctl help' for more details"
echo ''
echo "More:"
echo " Shell attach: remote_console | attach"
# echo " Up/Down-grade: upgrade | downgrade | install | uninstall | versions" # TODO enable when supported
echo " Install Info: ertspath | root_dir"
echo " Runtime Status: pid | ping"
echo " Validate Config: check_config"
echo " Advanced: console_clean | escript | rpc | rpcterms | eval | eval-ex"
echo ''
echo "Execute '$REL_NAME COMMAND help' for more information"
;;
esac
}
COMMAND="${1:-}"
GREP='grep --color=never'
if [ -z "$COMMAND" ]; then
usage 'help'
exit 1
elif [ "$COMMAND" = 'help' ]; then
usage 'help'
exit 0
fi
if [ "${2:-}" = 'help' ]; then
## 'ctl' command has its own usage info
if [ "$COMMAND" != 'ctl' ]; then
usage "$COMMAND"
exit 0
fi
fi
## IS_BOOT_COMMAND is set for later to inspect node name and cookie from hocon config (or env variable)
case "${COMMAND}" in
start|console|console_clean|foreground|check_config)
IS_BOOT_COMMAND='yes'
;;
ertspath)
echo "$ERTS_DIR"
exit 0
;;
root_dir)
echo "$RUNNER_ROOT_DIR"
exit 0
;;
*)
IS_BOOT_COMMAND='no'
;;
esac
## backward compatible
if [ -d "$ERTS_DIR/lib" ]; then
export LD_LIBRARY_PATH="$ERTS_DIR/lib:$LD_LIBRARY_PATH"
fi
# Simple way to check the correct user and fail early
check_user() {
# Validate that the user running the script is the owner of the
# RUN_DIR.
if [ "$RUNNER_USER" ] && [ "x$WHOAMI" != "x$RUNNER_USER" ]; then
if [ "x$WHOAMI" != "xroot" ]; then
echo "You need to be root or use sudo to run this command"
exit 1
fi
CMD="DEBUG=$DEBUG \"$RUNNER_SCRIPT\" "
for ARG in "$@"; do
CMD="${CMD} \"$ARG\""
done
# This will drop privileges into the runner user
# It exec's in a new shell and the current shell will exit
exec su - "$RUNNER_USER" -c "$CMD"
fi
}
# Make sure the user running this script is the owner and/or su to that user
check_user "$@"
ES=$?
if [ "$ES" -ne 0 ]; then
exit $ES
fi
# Make sure log directory exists
mkdir -p "$EMQX_LOG_DIR"
# turn off debug as this is static
set +x
COMPATIBILITY_CHECK='
io:format("BEAM_OK~n", []),
try
[_|_] = L = crypto:info_lib(),
io:format("CRYPTO_OK ~0p~n", [L])
catch
_ : _ ->
%% so logger has the chance to log something
timer:sleep(100),
halt(1)
end,
try
mnesia_hook:module_info(),
io:format("MNESIA_OK~n", [])
catch
_ : _ ->
io:format("WARNING: Mnesia app has no post-coommit hook support~n", []),
halt(2)
end,
halt(0).
'
[[ "$DEBUG" -gt 0 ]] && set -x
compatiblity_info() {
# RELEASE_LIB is used by Elixir
# set crash-dump bytes to zero to ensure no crash dump is generated when erl crashes
env ERL_CRASH_DUMP_BYTES=0 "$BINDIR/$PROGNAME" \
-noshell \
+S 2 \
+P 65536 \
+Q 65536 \
-boot "$REL_DIR/start_clean" \
-boot_var RELEASE_LIB "$ERTS_LIB_DIR/lib" \
-eval "$COMPATIBILITY_CHECK"
}
# Collect Erlang/OTP runtime sanity and compatibility in one go
maybe_use_portable_dynlibs() {
# Read BUILD_INFO early as the next commands may mess up the shell
BUILD_INFO="$(cat "${REL_DIR}/BUILD_INFO")"
COMPATIBILITY_INFO="$(compatiblity_info 2>/dev/null || true)"
if ! (echo -e "$COMPATIBILITY_INFO" | $GREP -q 'CRYPTO_OK'); then
## failed to start, might be due to missing libs, try to be portable
export LD_LIBRARY_PATH="${LD_LIBRARY_PATH:-$DYNLIBS_DIR}"
if [ "$LD_LIBRARY_PATH" != "$DYNLIBS_DIR" ]; then
export LD_LIBRARY_PATH="$DYNLIBS_DIR:$LD_LIBRARY_PATH"
fi
## Turn off debug, because COMPATIBILITY_INFO needs to capture stderr
COMPATIBILITY_INFO="$(compatiblity_info 2>&1 || true)"
if ! (echo -e "$COMPATIBILITY_INFO" | $GREP -q 'BEAM_OK'); then
## not able to start beam.smp
logerr "$COMPATIBILITY_INFO"
logerr "Please ensure it is running on the correct platform:"
logerr "$BUILD_INFO"
logerr "Version=$REL_VSN"
logerr "Required dependencies: openssl-1.1.1 (libcrypto), libncurses and libatomic1"
exit 1
elif ! (echo -e "$COMPATIBILITY_INFO" | $GREP -q 'CRYPTO_OK'); then
## not able to start crypto app
logerr "$COMPATIBILITY_INFO"
exit 2
fi
logwarn "Using libs from '${DYNLIBS_DIR}' due to missing from the OS."
fi
}
SED_REPLACE="sed -i "
case $(sed --help 2>&1) in
*GNU*) SED_REPLACE="sed -i ";;
*BusyBox*) SED_REPLACE="sed -i ";;
*) SED_REPLACE="sed -i '' ";;
esac
# Get node pid
relx_get_pid() {
if output="$(relx_nodetool rpcterms os getpid)"
then
# shellcheck disable=SC2001 # Escaped quote taken as closing quote in editor
echo "$output" | sed -e 's/"//g'
return 0
else
echo "$output"
return 1
fi
}
# Connect to a remote node
remsh() {
# Generate a unique id used to allow multiple remsh to the same node
# transparently
id="remsh$(gen_node_id)-${NAME}"
# shellcheck disable=SC2086
# Setup remote shell command to control node
if [ "$IS_ELIXIR" = no ] || [ "${EMQX_CONSOLE_FLAVOR:-}" = 'erl' ] ; then
set -- "$BINDIR/erl" "$NAME_TYPE" "$id" \
-remsh "$NAME" -boot "$REL_DIR/start_clean" \
-boot_var ERTS_LIB_DIR "$ERTS_LIB_DIR" \
-boot_var RELEASE_LIB "$ERTS_LIB_DIR" \
-setcookie "$COOKIE" \
-hidden \
-kernel net_ticktime "$TICKTIME" \
+P 65536 \
+Q 65536 \
+S 2 \
$EPMD_ARGS
else
set -- "$REL_DIR/iex" \
--remsh "$NAME" \
--boot-var RELEASE_LIB "$ERTS_LIB_DIR" \
--cookie "$COOKIE" \
--hidden \
--erl "-kernel net_ticktime $TICKTIME" \
--erl "$EPMD_ARGS" \
--erl "$NAME_TYPE $id" \
--erl "+P 65536" \
--erl "+Q 65536" \
--erl "+S 2" \
--boot "$REL_DIR/start_clean"
fi
exec "$@"
}
# Generate a random id
gen_node_id() {
od -t u -N 4 /dev/urandom | head -n1 | awk '{print $2 % 1000}'
}
call_nodetool() {
"$ERTS_DIR/bin/escript" "$RUNNER_ROOT_DIR/bin/nodetool" "$@"
}
# Control a node
relx_nodetool() {
command="$1"; shift
ERL_FLAGS="${ERL_FLAGS:-} $EPMD_ARGS -setcookie $COOKIE" \
call_nodetool "$NAME_TYPE" "$NAME" "$command" "$@"
}
call_hocon() {
call_nodetool hocon "$@" \
|| die "call_hocon_failed: $*" $?
}
find_emqx_process() {
## Find the running node from 'ps -ef'
## * The grep args like '[e]mqx' but not 'emqx' is to avoid greping the grep command itself
## * The running 'remsh' and 'nodetool' processes must be excluded
if [ -n "${EMQX_NODE__NAME:-}" ]; then
# if node name is provided, filter by node name
# shellcheck disable=SC2009
ps -ef | $GREP '[e]mqx' | $GREP -v -E '(remsh|nodetool)' | $GREP -E "\s-s?name\s${EMQX_NODE__NAME}" | $GREP -oE "\-[r]oot ${RUNNER_ROOT_DIR}.*" || true
else
# shellcheck disable=SC2009
ps -ef | $GREP '[e]mqx' | $GREP -v -E '(remsh|nodetool)' | $GREP -oE "\-[r]oot ${RUNNER_ROOT_DIR}.*" || true
fi
}
## Resolve boot configs in a batch
## This is because starting the Erlang beam with all modules loaded
## and parsing HOCON config + environment variables is a non-trivial task
CONF_KEYS=( 'node.data_dir' 'node.name' 'node.cookie' 'node.db_backend' 'cluster.proto_dist' 'node.dist_net_ticktime' )
if [ "$IS_ENTERPRISE" = 'yes' ]; then
CONF_KEYS+=( 'license.key' )
fi
## To be backward compatible, read and then unset EMQX_NODE_NAME
if [ -n "${EMQX_NODE_NAME:-}" ]; then
export EMQX_NODE__NAME="${EMQX_NODE_NAME}"
unset EMQX_NODE_NAME
fi
# Turn off debug as the ps output can be quite noisy
set +x
PS_LINE="$(find_emqx_process)"
logdebug "PS_LINE=$PS_LINE"
RUNNING_NODES_COUNT="$(echo -e "$PS_LINE" | sed '/^\s*$/d' | wc -l)"
[ "$RUNNING_NODES_COUNT" -gt 1 ] && logdebug "More than one running node found: count=$RUNNING_NODES_COUNT"
if [ "$IS_BOOT_COMMAND" = 'yes' ]; then
if [ "$RUNNING_NODES_COUNT" -gt 0 ] && [ "$COMMAND" != 'check_config' ]; then
running_node_name=$(echo -e "$PS_LINE" | $GREP -oE "\s-s?name.*" | awk '{print $2}' || true)
if [ -n "$running_node_name" ] && [ "$running_node_name" = "${EMQX_NODE__NAME:-}" ]; then
echo "Node ${running_node_name} is already running!"
exit 1
fi
fi
[ -f "$EMQX_ETC_DIR"/emqx.conf ] || die "emqx.conf is not found in $EMQX_ETC_DIR" 1
maybe_use_portable_dynlibs
if [ "${EMQX_BOOT_CONFIGS:-}" = '' ]; then
EMQX_BOOT_CONFIGS="$(call_hocon -s "$SCHEMA_MOD" -c "$EMQX_ETC_DIR"/emqx.conf multi_get "${CONF_KEYS[@]}")"
## export here so the 'console' command recursively called from
## 'start' command does not have to parse the configs again
export EMQX_BOOT_CONFIGS
fi
else
# For non-boot commands, we need below runtime facts to connect to the running node:
# 1. The running node name;
# 2. The Erlang cookie in use by the running node name;
# 3. SSL options if the node is using TLS for Erlang distribution;
# 4. Erlang kernel application's net_ticktime config.
#
# There are 3 sources of truth to get those runtime information.
# Listed in the order of preference:
# 1. The boot command (which can be inspected from 'ps -ef' command output)
# 2. The generated vm.<time>.config file located in the dir pointed by 'node.data_dir'
# 3. The bootstrap config 'etc/emqx.conf'
#
# If failed to read from source 1, the information is retrieved from source 3
# i.e. source 2 is never used.
#
# NOTES:
# * We should avoid getting runtime information with the 3rd approach because 'etc/emqx.conf' might
# be updated after the node is started. e.g. If a user starts the node with name 'emqx@127.0.0.1'
# then update the config in the file to 'node.name = "emqx@local.net"', after this change,
# there would be no way stop the running node 'emqx@127.0.0.1', because 'emqx stop' command
# would try to stop the new node instead.
if [ "$RUNNING_NODES_COUNT" -eq 1 ]; then
## only one emqx node is running, get running args from 'ps -ef' output
tmp_nodename=$(echo -e "$PS_LINE" | $GREP -oE "\s-s?name.*" | awk '{print $2}' || true)
tmp_cookie=$(echo -e "$PS_LINE" | $GREP -oE "\s-setcookie.*" | awk '{print $2}' || true)
tmp_proto_dist=$(echo -e "$PS_LINE" | $GREP -oE '\s-ekka_proto_dist.*' | awk '{print $2}' || echo 'inet_tcp')
SSL_DIST_OPTFILE="$(echo -e "$PS_LINE" | $GREP -oE '\-ssl_dist_optfile\s.+\s' | awk '{print $2}' || true)"
tmp_ticktime="$(echo -e "$PS_LINE" | $GREP -oE '\s-kernel\snet_ticktime\s.+\s' | awk '{print $3}' || true)"
tmp_datadir="$(echo -e "$PS_LINE" | $GREP -oE "\-emqx_data_dir.*" | sed -E 's#.+emqx_data_dir[[:blank:]]##g' | sed -E 's#[[:blank:]]--$##g' || true)"
## Make the format like what call_hocon multi_get prints out, but only need 4 args
EMQX_BOOT_CONFIGS="node.name=${tmp_nodename}\nnode.cookie=${tmp_cookie}\ncluster.proto_dist=${tmp_proto_dist}\nnode.dist_net_ticktime=$tmp_ticktime\nnode.data_dir=${tmp_datadir}"
else
if [ "$RUNNING_NODES_COUNT" -gt 1 ]; then
if [ -z "${EMQX_NODE__NAME:-}" ]; then
tmp_nodenames=$(echo -e "$PS_LINE" | $GREP -oE "\s-s?name.*" | awk '{print $2}' | tr '\n' ' ')
logerr "More than one EMQX node found running (root dir: ${RUNNER_ROOT_DIR})"
logerr "Running nodes: $tmp_nodenames"
logerr "Make sure environment variable EMQX_NODE__NAME is set to indicate for which node this command is intended."
exit 1
fi
else
if [ -n "${EMQX_NODE__NAME:-}" ]; then
die "Node $EMQX_NODE__NAME is not running?"
fi
fi
## We have no choice but to read the bootstrap config (with environment overrides available in the current shell)
[ -f "$EMQX_ETC_DIR"/emqx.conf ] || die "emqx.conf is not found in $EMQX_ETC_DIR" 1
maybe_use_portable_dynlibs
EMQX_BOOT_CONFIGS="$(call_hocon -s "$SCHEMA_MOD" -c "$EMQX_ETC_DIR"/emqx.conf multi_get "${CONF_KEYS[@]}")"
fi
fi
logdebug "EMQX_BOOT_CONFIGS: $EMQX_BOOT_CONFIGS"
[[ "$DEBUG" -gt 0 ]] && set -x
get_boot_config() {
path_to_value="$1"
echo -e "$EMQX_BOOT_CONFIGS" | $GREP "$path_to_value=" | sed -e "s/$path_to_value=//g" | tr -d \"
}
EPMD_ARGS="-start_epmd false -epmd_module ekka_epmd -proto_dist ekka"
PROTO_DIST="$(get_boot_config 'cluster.proto_dist' || true)"
TICKTIME="$(get_boot_config 'node.dist_net_ticktime' || echo '120')"
# this environment variable is required by ekka_dist module
# because proto_dist is overriden to ekka, and there is a lack of ekka_tls module
export EKKA_PROTO_DIST_MOD="${PROTO_DIST:-inet_tcp}"
if [ "$EKKA_PROTO_DIST_MOD" = 'inet_tls' ] || [ "$EKKA_PROTO_DIST_MOD" = 'inet6_tls' ]; then
if [ "$IS_BOOT_COMMAND" = 'yes' ]; then
SSL_DIST_OPTFILE=${EMQX_SSL_DIST_OPTFILE:-"$EMQX_ETC_DIR/ssl_dist.conf"}
case "$SSL_DIST_OPTFILE" in
*\ *)
# there is unfortunately no way to support space for this option because we'd need to grep
# from 'ps -ef' result to get this option for non-boot commands (nodetool) to run
set +x
logerr "Got space in: $SSL_DIST_OPTFILE"
logerr "No space is allowed for Erlang distribution over SSL option file path."
logerr "Configure it from environment variable EMQX_SSL_DIST_OPTFILE."
logerr "Or make sure emqx root path '$RUNNER_ROOT_DIR' has no space"
exit 1
;;
*)
true
;;
esac
fi
EPMD_ARGS="${EPMD_ARGS} -ssl_dist_optfile $SSL_DIST_OPTFILE"
fi
DATA_DIR="$(get_boot_config 'node.data_dir')"
# ensure no trailing /
DATA_DIR="${DATA_DIR%/}"
if [[ $DATA_DIR != /* ]]; then
# relative path
DATA_DIR="${BASE_RUNNER_ROOT_DIR}/${DATA_DIR}"
fi
CONFIGS_DIR="$DATA_DIR/configs"
mkdir -p "$CONFIGS_DIR"
check_license() {
if [ "$IS_ENTERPRISE" == "no" ]; then
return 0
fi
key_license="${EMQX_LICENSE__KEY:-$(get_boot_config 'license.key' || echo '')}"
if [[ -n "$key_license" && ("$key_license" != "undefined") ]]; then
call_nodetool check_license_key "$key_license"
else
set +x
logerr "License not found."
logerr "Please specify one via the EMQX_LICENSE__KEY variable"
logerr "or via license.key in emqx.conf."
return 1
fi
}
# When deciding which install upgrade script to run, we have to check
# our own version so we may avoid infinite loops and call the correct
# version.
current_script_version() {
curr_script=$(basename "${BASH_SOURCE[0]}")
suffix=${curr_script#*-}
if [[ "${suffix}" == "${curr_script}" ]]; then
# there's no suffix, so we're running the default `emqx` script;
# we'll have to trust the REL_VSN variable
echo "$REL_VSN"
else
echo "${suffix}"
fi
}
parse_semver() {
echo "$1" | tr '.|-' ' '
}
max_version_of() {
local vsn1="$1"
local vsn2="$2"
echo "${vsn1}" "${vsn2}" | tr " " "\n" | sort -rV | head -n1
}
versioned_script_path() {
local script_name="$1"
local vsn="$2"
echo "$RUNNER_ROOT_DIR/bin/$script_name-$vsn"
}
does_script_version_exist() {
local script_name="$1"
local vsn="$2"
if [[ -f "$(versioned_script_path "$script_name" "$vsn")" ]]; then
return 0
else
return 1
fi
}
# extract_from_package packege_path destination file1 file2
extract_from_package() {
local package="$1"
local dest_dir="$2"
shift 2
tar -C "$dest_dir" -xf "$package" "$@"
}
am_i_the_newest_script() {
local curr_vsn other_vsn
curr_vsn="$(current_script_version)"
other_vsn="$1"
max_vsn="$(max_version_of "$other_vsn" "$curr_vsn")"
if [[ "$max_vsn" == "$curr_vsn" ]]; then
return 0
else
return 1
fi
}
locate_package() {
local package_path candidates vsn
vsn="$1"
if [[ "${IS_ENTERPRISE}" == "yes" ]]; then
package_pattern="$RUNNER_ROOT_DIR/releases/emqx-enterprise-$vsn-*.tar.gz"
else
package_pattern="$RUNNER_ROOT_DIR/releases/emqx-$vsn-*.tar.gz"
fi
# shellcheck disable=SC2207,SC2086
candidates=($(ls $package_pattern))
if [[ "${#candidates[@]}" == 0 ]]; then
logerr "No package matching $package_pattern found."
exit 1
elif [[ "${#candidates[@]}" -gt 1 ]]; then
logerr "Multiple packages matching $package_pattern found. Ensure only one exists."
exit 1
else
echo "${candidates[0]}"
fi
}
ensure_newest_script_is_extracted() {
local newest_vsn="$1"
local package_path tmpdir
if does_script_version_exist "emqx" "$newest_vsn" \
&& does_script_version_exist "install_upgrade.escript" "$newest_vsn"; then
return
else
package_path="$(locate_package "$newest_vsn")"
tmpdir="$(mktemp -dp /tmp emqx.XXXXXXXXXXX)"
extract_from_package \
"$package_path" \
"$tmpdir" \
"bin/emqx-$newest_vsn" \
"bin/install_upgrade.escript-$newest_vsn"
cp "$tmpdir/bin/emqx-$newest_vsn" \
"$tmpdir/bin/install_upgrade.escript-$newest_vsn" \
"$RUNNER_ROOT_DIR/bin/"
rm -rf "$tmpdir"
fi
}
# Run an escript in the node's environment
relx_escript() {
shift; scriptpath="$1"; shift
"$ERTS_DIR/bin/escript" "$RUNNER_ROOT_DIR/$scriptpath" "$@"
}
# Output a start command for the last argument of run_erl
relx_start_command() {
printf "exec \"%s\" \"%s\"" "$RUNNER_SCRIPT" \
"$START_OPTION"
}
# Function to check configs without generating them
check_config() {
## this command checks the configs without generating any files
call_hocon -v \
-s "$SCHEMA_MOD" \
-c "$DATA_DIR"/configs/cluster.hocon \
-c "$EMQX_ETC_DIR"/emqx.conf \
check_schema
}
# Function to generate app.config and vm.args
# sets two environment variables CONF_FILE and ARGS_FILE
generate_config() {
local name_type="$1"
local node_name="$2"
## Delete the *.siz files first or it can't start after
## changing the config 'log.rotation.size'
rm -f "${EMQX_LOG_DIR}"/*.siz
## timestamp for each generation
local NOW_TIME
NOW_TIME="$(date +'%Y.%m.%d.%H.%M.%S')"
## This command populates two files: app.<time>.config and vm.<time>.args
## It takes input sources and overlays values in below order:
## - $DATA_DIR/cluster.hocon (if exists)
## - etc/emqx.conf
## - environment variables starts with EMQX_ e.g. EMQX_NODE__ROLE
##
## NOTE: it's a known issue that cluster.hocon may change right after the node boots up
## because it has to sync cluster.hocon from other nodes.
call_hocon -v -t "$NOW_TIME" \
-s "$SCHEMA_MOD" \
-c "$DATA_DIR"/configs/cluster.hocon \
-c "$EMQX_ETC_DIR"/emqx.conf \
-d "$DATA_DIR"/configs generate
## filenames are per-hocon convention
CONF_FILE="$CONFIGS_DIR/app.$NOW_TIME.config"
ARGS_FILE="$CONFIGS_DIR/vm.$NOW_TIME.args"
## Merge hocon generated *.args into the vm.args
TMP_ARG_FILE="$CONFIGS_DIR/vm.args.tmp"
cp "$EMQX_ETC_DIR/vm.args" "$TMP_ARG_FILE"
echo "" >> "$TMP_ARG_FILE"
echo "-pa \"${REL_DIR}/consolidated\"" >> "$TMP_ARG_FILE"
## read lines from generated vm.<time>.args file
## drop comment lines, and empty lines using sed
## pipe the lines to a while loop
sed '/^#/d' "$ARGS_FILE" | sed '/^$/d' | while IFS='' read -r ARG_LINE || [ -n "$ARG_LINE" ]; do
## in the loop, split the 'key[:space:]value' pair
ARG_KEY=$(echo "$ARG_LINE" | awk '{$NF="";print}')
ARG_VALUE=$(echo "$ARG_LINE" | awk '{print $NF}')
## use the key to look up in vm.args file for the value
TMP_ARG_VALUE=$($GREP "^$ARG_KEY" "$TMP_ARG_FILE" || true | awk '{print $NF}')
## compare generated (to override) value to original (to be overridden) value
if [ "$ARG_VALUE" != "$TMP_ARG_VALUE" ] ; then
## if they are different
if [ -n "$TMP_ARG_VALUE" ]; then
## if the old value is present, replace it with generated value
sh -c "$SED_REPLACE 's|^$ARG_KEY.*$|$ARG_LINE|' \"$TMP_ARG_FILE\""
else
## otherwise append generated value to the end
echo "$ARG_LINE" >> "$TMP_ARG_FILE"
fi
fi
done
echo "$name_type $node_name" >> "$TMP_ARG_FILE"
echo "-mnesia dir '\"$DATA_DIR/mnesia/$NAME\"'" >> "$TMP_ARG_FILE"
## rename the generated vm.<time>.args file
mv -f "$TMP_ARG_FILE" "$ARGS_FILE"
}
# check if a PID is defunct
is_defunct() {
local PID="$1"
ps -fp "$PID" | $GREP -q 'defunct'
}
# check if a PID is down
# shellcheck disable=SC2317 # call in func `nodetool_shutdown()`
is_down() {
PID="$1"
if ps -p "$PID" >/dev/null; then
# still around
# shellcheck disable=SC2009 # this grep pattern is not a part of the program names
if is_defunct "$PID"; then
# zombie state, print parent pid
parent="$(ps -o ppid= -p "$PID" | tr -d ' ')"
if [ -z "$parent" ] && ! is_defunct "$PID"; then
# process terminated in the meanwhile
return 0;
fi
logwarn "$PID is marked <defunct>, parent: $(ps -p "$parent")"
return 0
fi
return 1
fi
# it's gone
return 0
}
wait_for() {
local WAIT_TIME
local CMD
WAIT_TIME="$1"
shift
CMD="$*"
while true; do
if $CMD; then
return 0
fi
if [ "$WAIT_TIME" -le 0 ]; then
return 1
fi
WAIT_TIME=$((WAIT_TIME - 1))
sleep 1
done
}
wait_until_return_val() {
local RESULT
local WAIT_TIME
local CMD
RESULT="$1"
WAIT_TIME="$2"
shift 2
CMD="$*"
while true; do
if [ "$($CMD 2>/dev/null)" = "$RESULT" ]; then
return 0
fi
if [ "$WAIT_TIME" -le 0 ]; then
return 1
fi
WAIT_TIME=$((WAIT_TIME - 1))
sleep 1
done
}
# First, there is EMQX_DEFAULT_LOG_HANDLER which can control the default values
# to be used when generating configs.
# It's set in docker entrypoint and in systemd service file.
#
# To be backward compatible with 4.x and v5.0.0 ~ v5.0.24/e5.0.2:
# if EMQX_LOG__TO is set, we try to enable handlers from environment variables.
# i.e. it overrides the default value set in EMQX_DEFAULT_LOG_HANDLER
tr_log_to_env() {
local log_to=${EMQX_LOG__TO:-undefined}
# unset because it's unknown to 5.0
unset EMQX_LOG__TO
case "${log_to}" in
console)
export EMQX_LOG__CONSOLE__ENABLE='true'
export EMQX_LOG__FILE__ENABLE='false'
;;
file)
export EMQX_LOG__CONSOLE__ENABLE='false'
export EMQX_LOG__FILE__ENABLE='true'
;;
both)
export EMQX_LOG__CONSOLE__ENABLE='true'
export EMQX_LOG__FILE__ENABLE='true'
;;
default)
# want to use config file defaults, do nothing
;;
undefined)
# value not set, do nothing
;;
*)
logerr "Unknown environment value for EMQX_LOG__TO=${log_to} discarded"
;;
esac
}
maybe_log_to_console() {
if [ "${EMQX_LOG__TO:-}" = 'default' ]; then
# want to use defaults, do nothing
unset EMQX_LOG__TO
else
tr_log_to_env
export EMQX_DEFAULT_LOG_HANDLER=${EMQX_DEFAULT_LOG_HANDLER:-console}
fi
}
# Warn the user if ulimit -n is less than 1024
maybe_warn_ulimit() {
ULIMIT_F=$(ulimit -n)
if [ "$ULIMIT_F" -lt 1024 ]; then
logwarn "ulimit -n is ${ULIMIT_F}; 1024 is the recommended minimum."
fi
}
## Possible ways to configure emqx node name:
## 1. configure node.name in emqx.conf
## 2. override with environment variable EMQX_NODE__NAME
## Node name is either short-name (without '@'), e.g. 'emqx'
## or long name (with '@') e.g. 'emqx@example.net' or 'emqx@127.0.0.1'
NAME="${EMQX_NODE__NAME:-}"
if [ -z "$NAME" ]; then
NAME="$(get_boot_config 'node.name')"
fi
# force to use 'emqx' short name
[ -z "$NAME" ] && NAME='emqx'
case "$NAME" in
*@*)
NAME_TYPE='-name'
;;
*)
NAME_TYPE='-sname'
esac
SHORT_NAME="$(echo "$NAME" | awk -F'@' '{print $1}')"
HOST_NAME="$(echo "$NAME" | awk -F'@' '{print $2}')"
if ! (echo "$SHORT_NAME" | $GREP -q '^[0-9A-Za-z_\-]\+$'); then
logerr "Invalid node name, should be of format '^[0-9A-Za-z_-]+$'."
exit 1
fi
# This also changes the program name from 'beam.smp' to node name
# e.g. the 'ps' command output
export ESCRIPT_NAME="$SHORT_NAME"
PIPE_DIR="${PIPE_DIR:-/$DATA_DIR/${WHOAMI}_erl_pipes/$NAME/}"
## Resolve Erlang cookie.
if [ -n "${EMQX_NODE_COOKIE:-}" ]; then
## To be backward compatible, read and unset EMQX_NODE_COOKIE
export EMQX_NODE__COOKIE="${EMQX_NODE_COOKIE}"
unset EMQX_NODE_COOKIE
fi
COOKIE="${EMQX_NODE__COOKIE:-}"
COOKIE_IN_USE="$(get_boot_config 'node.cookie')"
if [ "$IS_BOOT_COMMAND" != 'yes' ] && [ -n "$COOKIE_IN_USE" ] && [ -n "$COOKIE" ] && [ "$COOKIE" != "$COOKIE_IN_USE" ]; then
die "EMQX_NODE__COOKIE is different from the cookie used by $NAME"
fi
[ -z "$COOKIE" ] && COOKIE="$COOKIE_IN_USE"
[ -z "$COOKIE" ] && COOKIE="$EMQX_DEFAULT_ERLANG_COOKIE"
maybe_warn_default_cookie() {
if [ $IS_BOOT_COMMAND = 'yes' ] && [ "$COOKIE" = "$EMQX_DEFAULT_ERLANG_COOKIE" ]; then
logwarn "Default (insecure) Erlang cookie is in use."
logwarn "Configure node.cookie in $EMQX_ETC_DIR/emqx.conf or override from environment variable EMQX_NODE__COOKIE"
logwarn "NOTE: Use the same cookie for all nodes in the cluster."
fi
}
## check if OTP version has mnesia_hook feature; if not, fallback to
## using Mnesia DB backend.
if [[ "$IS_BOOT_COMMAND" == 'yes' && "$(get_boot_config 'node.db_backend')" == "rlog" ]]; then
if ! (echo -e "$COMPATIBILITY_INFO" | $GREP -q 'MNESIA_OK'); then
logwarn "DB Backend is RLOG, but an incompatible OTP version has been detected. Falling back to using Mnesia DB backend."
export EMQX_NODE__DB_BACKEND=mnesia
export EMQX_NODE__ROLE=core
fi
fi
diagnose_boot_failure_and_die() {
local ps_line
local app_status
ps_line="$(find_emqx_process)"
if [ -z "$ps_line" ]; then
echo "Find more information in the latest log file: ${EMQX_LOG_DIR}/erlang.log.*"
exit 1
fi
if ! relx_nodetool "ping" > /dev/null; then
logerr "$NAME seems to be running, but not responding to pings."
echo "Make sure '$HOST_NAME' is a resolvable and reachable hostname."
pipe_shutdown
exit 2
fi
app_status="$(relx_nodetool 'eval' 'emqx:is_running()')"
if [ "$app_status" != 'true' ]; then
logerr "$NAME node is started, but failed to complete the boot sequence in time."
pipe_shutdown
exit 3
fi
}
## Only works when started in daemon mode
pipe_shutdown() {
if [ -d "$PIPE_DIR" ]; then
echo "Shutting down $NAME from to_erl pipe."
## can not evaluate init:stop() or erlang:halt() because the shell is restricted
echo 'emqx_machine:brutal_shutdown().' | "$BINDIR/to_erl" "$PIPE_DIR"
fi
}
## Call nodetool to stop EMQX
nodetool_shutdown() {
# Wait for the node to completely stop...
PID="$(relx_get_pid)"
if ! relx_nodetool "stop"; then
die "Graceful shutdown failed PID=[$PID]"
fi
WAIT_TIME="${EMQX_WAIT_FOR_STOP:-120}"
if ! wait_for "$WAIT_TIME" 'is_down' "$PID"; then
msg="dangling after ${WAIT_TIME} seconds"
# also log to syslog
logger -t "${REL_NAME}[${PID}]" "STOP: $msg"
# log to user console
set +x
logerr "Stop failed, $msg"
echo "ERROR: $PID is still around"
ps -p "$PID"
exit 1
fi
echo "ok"
logger -t "${REL_NAME}[${PID}]" "STOP: OK"
}
cd "$BASE_RUNNER_ROOT_DIR"
case "${COMMAND}" in
start)
maybe_warn_ulimit
maybe_warn_default_cookie
# this flag passes down to console mode
# so we know it's intended to be run in daemon mode
export _EMQX_START_DAEMON_MODE=1
case "$COMMAND" in
start)
shift
START_OPTION="console"
HEART_OPTION="start"
;;
esac
RUN_PARAM="$*"
# Set arguments for the heart command
set -- "$RUNNER_SCRIPT" "$HEART_OPTION"
[ "$RUN_PARAM" ] && set -- "$@" "$RUN_PARAM"
# Export the HEART_COMMAND
HEART_COMMAND="$RUNNER_SCRIPT $COMMAND"
export HEART_COMMAND
## See: http://erlang.org/doc/man/run_erl.html
# Export the RUN_ERL_LOG_GENERATIONS
export RUN_ERL_LOG_GENERATIONS=${RUN_ERL_LOG_GENERATIONS:-"5"}
# Export the RUN_ERL_LOG_MAXSIZE
export RUN_ERL_LOG_MAXSIZE=${RUN_ERL_LOG_MAXSIZE:-"10485760"}
mkdir -p "$PIPE_DIR"
"$BINDIR/run_erl" -daemon "$PIPE_DIR" "$EMQX_LOG_DIR" \
"$(relx_start_command)"
WAIT_TIME=${EMQX_WAIT_FOR_START:-120}
if wait_until_return_val "true" "$WAIT_TIME" 'relx_nodetool' \
'eval' 'emqx:is_running()'; then
echo "$EMQX_DESCRIPTION $REL_VSN is started successfully!"
exit 0
else
logerr "${EMQX_DESCRIPTION} ${REL_VSN} using node name '${NAME}' failed ${WAIT_TIME} probes."
diagnose_boot_failure_and_die
fi
;;
stop)
if ! nodetool_shutdown; then
pipe_shutdown
fi
;;
pid)
## Get the VM's pid
if ! relx_get_pid; then
exit 1
fi
;;
ping)
assert_node_alive
echo pong
;;
escript)
## Run an escript under the node's environment
if ! relx_escript "$@"; then
exit 1
fi
;;
attach)
exec "$BINDIR/to_erl" "$PIPE_DIR"
;;
remote_console)
assert_node_alive
shift
remsh
;;
upgrade|downgrade|install|unpack|uninstall)
if [ -z "${2:-}" ]; then
echo "Missing version argument"
echo "Usage: $REL_NAME $COMMAND {version}"
exit 1
fi
shift
assert_node_alive
curr_vsn="$(current_script_version)"
target_vsn="$1"
newest_vsn="$(max_version_of "$target_vsn" "$curr_vsn")"
ensure_newest_script_is_extracted "$newest_vsn"
# if we are not the newest script, run the same command from it
if ! am_i_the_newest_script "$newest_vsn"; then
script_path="$(versioned_script_path emqx "$newest_vsn")"
exec "$script_path" "$COMMAND" "$@"
fi
upgrade_script_path="$(versioned_script_path install_upgrade.escript "$newest_vsn")"
echo "using ${upgrade_script_path} to run ${COMMAND} $*"
ERL_FLAGS="${ERL_FLAGS:-} $EPMD_ARGS" \
exec "$BINDIR/escript" "$upgrade_script_path" \
"$COMMAND" "{'$REL_NAME', \"$NAME_TYPE\", '$NAME', '$COOKIE'}" "$@"
;;
versions)
assert_node_alive
shift
ERL_FLAGS="${ERL_FLAGS:-} $EPMD_ARGS" \
exec "$BINDIR/escript" "$RUNNER_ROOT_DIR/bin/install_upgrade.escript" \
"versions" "{'$REL_NAME', \"$NAME_TYPE\", '$NAME', '$COOKIE'}" "$@"
;;
console|console_clean|foreground)
# .boot file typically just $REL_NAME (ie, the app name)
# however, for debugging, sometimes start_clean.boot is useful.
# For e.g. 'setup', one may even want to name another boot script.
case "$COMMAND" in
console|foreground)
if [ -f "$REL_DIR/$REL_NAME.boot" ]; then
BOOTFILE="$REL_DIR/$REL_NAME"
else
BOOTFILE="$REL_DIR/start"
fi
;;
console_clean)
BOOTFILE="$REL_DIR/start_clean"
;;
esac
case "$COMMAND" in
foreground)
FOREGROUNDOPTIONS="-enable-feature maybe_expr -noinput -noshell +Bd"
;;
*)
FOREGROUNDOPTIONS='-enable-feature maybe_expr'
;;
esac
# set before generate_config
if [ "${_EMQX_START_DAEMON_MODE:-}" = 1 ]; then
tr_log_to_env
else
maybe_log_to_console
maybe_warn_ulimit
maybe_warn_default_cookie
fi
#generate app.config and vm.args
generate_config "$NAME_TYPE" "$NAME"
check_license
# Setup beam-required vars
EMU="beam"
PROGNAME="${0}"
export EMU
export PROGNAME
# Store passed arguments since they will be erased by `set`
ARGS="$*"
# shellcheck disable=SC2086
# Build an array of arguments to pass to exec later on
# Build it here because this command will be used for logging.
if [ "$IS_ELIXIR" = no ] || [ "${EMQX_CONSOLE_FLAVOR:-}" = 'erl' ] ; then
if [[ "$DEBUG" == 2 ]]; then
INIT_DEBUG_ARG="-init_debug"
else
INIT_DEBUG_ARG=""
fi
# pass down RELEASE_LIB so we can switch to IS_ELIXIR=no
# to boot an Erlang node from the elixir release
set -- "$BINDIR/erlexec" \
$FOREGROUNDOPTIONS \
-boot "$BOOTFILE" \
-boot_var RELEASE_LIB "$ERTS_LIB_DIR" \
-boot_var ERTS_LIB_DIR "$ERTS_LIB_DIR" \
-mode "$CODE_LOADING_MODE" \
-config "$CONF_FILE" \
-args_file "$ARGS_FILE" \
$INIT_DEBUG_ARG \
$EPMD_ARGS
else
if [[ "$DEBUG" == 2 ]]; then
INIT_DEBUG_ARG="--erl -init_debug"
else
INIT_DEBUG_ARG=""
fi
set -- "$REL_DIR/iex" \
--boot "$BOOTFILE" \
--boot-var RELEASE_LIB "${ERTS_LIB_DIR}" \
--erl-config "${CONF_FILE}" \
--vm-args "${ARGS_FILE}" \
--erl "$FOREGROUNDOPTIONS" \
--erl "-mode $CODE_LOADING_MODE" \
--erl "$EPMD_ARGS" \
$INIT_DEBUG_ARG \
--werl
fi
# Log the startup
logger -t "${REL_NAME}[$$]" "EXEC: $* -- ${1+$ARGS} -ekka_proto_dist ${EKKA_PROTO_DIST_MOD} -emqx_data_dir ${DATA_DIR}"
# Start the VM
# add ekka_proto_dist emqx_data_dir to boot command so it is visible from 'ps -ef'
# NTOE: order matters! emqx_data_dir has to be positioned at the end of the line to simplify the
# line parsing when file path contains spaces
exec "$@" -- ${1+$ARGS} -ekka_proto_dist "${EKKA_PROTO_DIST_MOD}" -emqx_data_dir "${DATA_DIR}"
;;
ctl)
assert_node_alive
shift
relx_nodetool rpc_infinity emqx_ctl run_command "$@"
;;
rpc)
assert_node_alive
shift
relx_nodetool rpc "$@"
;;
rpcterms)
assert_node_alive
shift
relx_nodetool rpcterms "$@"
;;
eval)
assert_node_alive
shift
relx_nodetool "eval" "$@"
;;
eval-ex)
assert_node_alive
shift
if [ "$IS_ELIXIR" = "yes" ]
then
"$REL_DIR/elixir" \
--hidden \
--name "rand-$(gen_node_id)-$NAME" \
--cookie "$COOKIE" \
--boot "$REL_DIR/start_clean" \
--boot-var RELEASE_LIB "$ERTS_LIB_DIR" \
--vm-args "$REL_DIR/remote.vm.args" \
--erl "-start_epmd false" \
--erl "-epmd_module ekka_epmd" \
--erl "+P 65536" \
--erl "+Q 65536" \
--erl "+S 2" \
--rpc-eval "$NAME" "$@"
else
echo "EMQX node is not an Elixir node"
usage "$COMMAND"
exit 1
fi
;;
check_config)
check_config
;;
*)
usage "$COMMAND"
exit 1
;;
esac
exit 0
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