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celeryd.initd
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celeryd.initd
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#!/bin/sh -e
# ============================================
# celeryd - Starts the Celery worker daemon.
# ============================================
#
# :Usage: /etc/init.d/celeryd {start|stop|force-reload|restart|try-restart|status}
# :Configuration file: /etc/default/celeryd
#
# See http://docs.celeryproject.org/en/latest/tutorials/daemonizing.html#generic-init-scripts
### BEGIN INIT INFO
# Provides: celeryd
# Required-Start: $network $local_fs $remote_fs
# Required-Stop: $network $local_fs $remote_fs
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: celery task worker daemon
### END INIT INFO
#
#
# To implement separate init scripts, copy this script and give it a different
# name:
# I.e., if my new application, "little-worker" needs an init, I
# should just use:
#
# cp /etc/init.d/celeryd /etc/init.d/little-worker
#
# You can then configure this by manipulating /etc/default/little-worker.
#
# May be a runlevel symlink (e.g. S02celeryd)
if [ -L "$0" ]; then
SCRIPT_FILE=$(readlink "$0")
else
SCRIPT_FILE="$0"
fi
SCRIPT_NAME="$(basename "$SCRIPT_FILE")"
DEFAULT_USER="celery"
DEFAULT_PID_FILE="/var/run/celery/%n.pid"
DEFAULT_LOG_FILE="/var/log/celery/%n.log"
DEFAULT_LOG_LEVEL="INFO"
DEFAULT_NODES="celery"
DEFAULT_CELERYD="-m celery worker --detach"
CELERY_DEFAULTS=${CELERY_DEFAULTS:-"/etc/default/${SCRIPT_NAME}"}
test -f "$CELERY_DEFAULTS" && . "$CELERY_DEFAULTS"
# Sets --app argument for CELERY_BIN
CELERY_APP_ARG=""
if [ ! -z "$CELERY_APP" ]; then
CELERY_APP_ARG="--app=$CELERY_APP"
fi
CELERYD_USER=${CELERYD_USER:-$DEFAULT_USER}
# Set CELERY_CREATE_DIRS to always create log/pid dirs.
CELERY_CREATE_DIRS=${CELERY_CREATE_DIRS:-0}
CELERY_CREATE_RUNDIR=$CELERY_CREATE_DIRS
CELERY_CREATE_LOGDIR=$CELERY_CREATE_DIRS
if [ -z "$CELERYD_PID_FILE" ]; then
CELERYD_PID_FILE="$DEFAULT_PID_FILE"
CELERY_CREATE_RUNDIR=1
fi
if [ -z "$CELERYD_LOG_FILE" ]; then
CELERYD_LOG_FILE="$DEFAULT_LOG_FILE"
CELERY_CREATE_LOGDIR=1
fi
CELERYD_LOG_LEVEL=${CELERYD_LOG_LEVEL:-${CELERYD_LOGLEVEL:-$DEFAULT_LOG_LEVEL}}
CELERY_BIN=${CELERY_BIN:-"celery"}
CELERYD_MULTI=${CELERYD_MULTI:-"$CELERY_BIN multi"}
CELERYD_NODES=${CELERYD_NODES:-$DEFAULT_NODES}
export CELERY_LOADER
if [ -n "$2" ]; then
CELERYD_OPTS="$CELERYD_OPTS $2"
fi
CELERYD_LOG_DIR=`dirname $CELERYD_LOG_FILE`
CELERYD_PID_DIR=`dirname $CELERYD_PID_FILE`
# Extra start-stop-daemon options, like user/group.
if [ -n "$CELERYD_CHDIR" ]; then
DAEMON_OPTS="$DAEMON_OPTS --workdir=$CELERYD_CHDIR"
fi
check_dev_null() {
if [ ! -c /dev/null ]; then
echo "/dev/null is not a character device!"
exit 75 # EX_TEMPFAIL
fi
}
maybe_die() {
if [ $? -ne 0 ]; then
echo "Exiting: $* (errno $?)"
exit 77 # EX_NOPERM
fi
}
create_default_dir() {
if [ ! -d "$1" ]; then
echo "- Creating default directory: '$1'"
mkdir -p "$1"
maybe_die "Couldn't create directory $1"
echo "- Changing permissions of '$1' to 02755"
chmod 02755 "$1"
maybe_die "Couldn't change permissions for $1"
if [ -n "$CELERYD_USER" ]; then
echo "- Changing owner of '$1' to '$CELERYD_USER'"
chown "$CELERYD_USER" "$1"
maybe_die "Couldn't change owner of $1"
fi
if [ -n "$CELERYD_GROUP" ]; then
echo "- Changing group of '$1' to '$CELERYD_GROUP'"
chgrp "$CELERYD_GROUP" "$1"
maybe_die "Couldn't change group of $1"
fi
fi
}
check_paths() {
if [ $CELERY_CREATE_LOGDIR -eq 1 ]; then
create_default_dir "$CELERYD_LOG_DIR"
fi
if [ $CELERY_CREATE_RUNDIR -eq 1 ]; then
create_default_dir "$CELERYD_PID_DIR"
fi
}
create_paths() {
create_default_dir "$CELERYD_LOG_DIR"
create_default_dir "$CELERYD_PID_DIR"
}
export PATH="${PATH:+$PATH:}/usr/sbin:/sbin"
_get_pids() {
found_pids=0
my_exitcode=0
for pid_file in "$CELERYD_PID_DIR"/*.pid; do
local pid=`cat "$pid_file"`
local cleaned_pid=`echo "$pid" | sed -e 's/[^0-9]//g'`
if [ -z "$pid" ] || [ "$cleaned_pid" != "$pid" ]; then
echo "bad pid file ($pid_file)"
one_failed=true
my_exitcode=1
else
found_pids=1
echo "$pid"
fi
if [ $found_pids -eq 0 ]; then
echo "${SCRIPT_NAME}: All nodes down"
exit $my_exitcode
fi
done
}
_chuid () {
su "$CELERYD_USER" -c "$CELERYD_MULTI $*"
}
start_workers () {
if [ ! -z "$CELERYD_ULIMIT" ]; then
ulimit $CELERYD_ULIMIT
fi
_chuid $* start $CELERYD_NODES $DAEMON_OPTS \
--pidfile="$CELERYD_PID_FILE" \
--logfile="$CELERYD_LOG_FILE" \
--loglevel="$CELERYD_LOG_LEVEL" \
$CELERY_APP_ARG \
$CELERYD_OPTS
}
dryrun () {
(C_FAKEFORK=1 start_workers --verbose)
}
stop_workers () {
_chuid stopwait $CELERYD_NODES --pidfile="$CELERYD_PID_FILE"
}
restart_workers () {
_chuid restart $CELERYD_NODES $DAEMON_OPTS \
--pidfile="$CELERYD_PID_FILE" \
--logfile="$CELERYD_LOG_FILE" \
--loglevel="$CELERYD_LOG_LEVEL" \
$CELERY_APP_ARG \
$CELERYD_OPTS
}
kill_workers() {
_chuid kill $CELERYD_NODES --pidfile="$CELERYD_PID_FILE"
}
restart_workers_graceful () {
local worker_pids=
worker_pids=`_get_pids`
[ "$one_failed" ] && exit 1
for worker_pid in $worker_pids; do
local failed=
kill -HUP $worker_pid 2> /dev/null || failed=true
if [ "$failed" ]; then
echo "${SCRIPT_NAME} worker (pid $worker_pid) could not be restarted"
one_failed=true
else
echo "${SCRIPT_NAME} worker (pid $worker_pid) received SIGHUP"
fi
done
[ "$one_failed" ] && exit 1 || exit 0
}
check_status () {
my_exitcode=0
found_pids=0
local one_failed=
for pid_file in "$CELERYD_PID_DIR"/*.pid; do
local node=`basename "$pid_file" .pid`
local pid=`cat "$pid_file"`
local cleaned_pid=`echo "$pid" | sed -e 's/[^0-9]//g'`
if [ -z "$pid" ] || [ "$cleaned_pid" != "$pid" ]; then
echo "bad pid file ($pid_file)"
one_failed=true
else
local failed=
kill -0 $pid 2> /dev/null || failed=true
if [ "$failed" ]; then
echo "${SCRIPT_NAME} (node $node) (pid $pid) is stopped, but pid file exists!"
one_failed=true
else
echo "${SCRIPT_NAME} (node $node) (pid $pid) is running..."
fi
fi
done
[ "$one_failed" ] && exit 1 || exit 0
}
case "$1" in
start)
check_dev_null
check_paths
start_workers
;;
stop)
check_dev_null
check_paths
stop_workers
;;
reload|force-reload)
echo "Use restart"
;;
status)
check_status
;;
restart)
check_dev_null
check_paths
restart_workers
;;
graceful)
check_dev_null
restart_workers_graceful
;;
kill)
check_dev_null
kill_workers
;;
dryrun)
check_dev_null
dryrun
;;
try-restart)
check_dev_null
check_paths
restart_workers
;;
create-paths)
check_dev_null
create_paths
;;
check-paths)
check_dev_null
check_paths
;;
*)
echo "Usage: /etc/init.d/${SCRIPT_NAME} {start|stop|restart|graceful|kill|dryrun|create-paths}"
exit 64 # EX_USAGE
;;
esac
exit 0