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celerybeat 6.49 KB
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jwlin 提交于 2014-08-29 16:37 . add periodic task and celerybeat config
#!/bin/sh
# ============================================
# celerybeat - Starts the Celery periodic task scheduler.
# ============================================
#
# :Usage: /etc/init.d/celerybeat {start|stop|restart|status}
# :Configuration file: /etc/sysconfig/celerybeat
#
# See http://docs.celeryproject.org/en/latest/tutorials/daemonizing.html
### BEGIN INIT INFO
# Provides: celerybeat
# 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, do NOT copy this script. Instead,
# symlink it. I.e., if my new application, "little-worker" needs an init, I
# should just use:
#
# ln -s /etc/init.d/celerybeat /etc/init.d/little-worker
#
# You can then configure this by manipulating /etc/sysconfig/little-worker.
#
# Setting `prog` here allows you to symlink this init script, making it easy
# to run multiple processes on the system.
# If we're invoked via SysV-style runlevel scripts we need to follow the
# link from rcX.d before working out the script name.
if [[ `dirname $0` == /etc/rc*.d ]]; then
target="$(readlink $0)"
else
target=$0
fi
prog="$(basename $target)"
# Source the centos service helper functions
source /etc/init.d/functions
# NOTE: "set -e" does not work with the above functions,
# which use non-zero return codes as non-error return conditions
# some commands work asyncronously, so we'll wait this many seconds
SLEEP_SECONDS=5
DEFAULT_PID_FILE="/var/run/celery/$prog.pid"
DEFAULT_LOG_FILE="/var/log/celery/$prog.log"
DEFAULT_LOG_LEVEL="INFO"
DEFAULT_NODES="celery"
CELERY_DEFAULTS=${CELERY_DEFAULTS:-"/etc/sysconfig/$prog"}
test -f "$CELERY_DEFAULTS" && . "$CELERY_DEFAULTS"
# Set CELERY_CREATE_DIRS to always create log/pid dirs.
CELERY_CREATE_DIRS=${CELERY_CREATE_DIRS:-0}
CELERY_CREATE_RUNDIR=$CELERY_CREATE_DIRS
CELERY_CREATE_LOGDIR=$CELERY_CREATE_DIRS
if [ -z "$CELERYBEAT_PID_FILE" ]; then
CELERYBEAT_PID_FILE="$DEFAULT_PID_FILE"
CELERY_CREATE_RUNDIR=1
fi
if [ -z "$CELERYBEAT_LOG_FILE" ]; then
CELERYBEAT_LOG_FILE="$DEFAULT_LOG_FILE"
CELERY_CREATE_LOGDIR=1
fi
CELERYBEAT_LOG_LEVEL=${CELERYBEAT_LOG_LEVEL:-${CELERYBEAT_LOGLEVEL:-$DEFAULT_LOG_LEVEL}}
CELERYBEAT=${CELERYBEAT:-"${CELERY_BIN} beat"}
CELERYBEAT=${CELERYBEAT:-$DEFAULT_CELERYBEAT}
CELERYBEAT_NODES=${CELERYBEAT_NODES:-$DEFAULT_NODES}
# This is used to change how Celery loads in the configs. It does not need to
# be set to be run.
export CELERY_LOADER
if [ -n "$2" ]; then
CELERYBEAT_OPTS="$CELERYBEAT_OPTS $2"
fi
CELERYBEAT_OPTS=${CELERYBEAT_OPTS:-"--app=$CELERY_APP"}
CELERYBEAT_LOG_DIR=`dirname $CELERYBEAT_LOG_FILE`
CELERYBEAT_PID_DIR=`dirname $CELERYBEAT_PID_FILE`
# Extra start-stop-daemon options, like user/group.
if [ -n "$CELERYBEAT_USER" ]; then
DAEMON_OPTS="$DAEMON_OPTS --uid=$CELERYBEAT_USER"
fi
if [ -n "$CELERYBEAT_GROUP" ]; then
DAEMON_OPTS="$DAEMON_OPTS --gid=$CELERYBEAT_GROUP"
fi
if [ -n "$CELERYBEAT_CHDIR" ]; then
DAEMON_OPTS="$DAEMON_OPTS --workdir=$CELERYBEAT_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 $1"
if [ -n "$CELERYBEAT_USER" ]; then
echo "- Changing owner of '$1' to '$CELERYBEAT_USER'"
chown "$CELERYBEAT_USER" "$1"
maybe_die "Couldn't change owner of $1"
fi
if [ -n "$CELERYBEAT_GROUP" ]; then
echo "- Changing group of '$1' to '$CELERYBEAT_GROUP'"
chgrp "$CELERYBEAT_GROUP" "$1"
maybe_die "Couldn't change group of $1"
fi
fi
}
check_paths() {
if [ $CELERY_CREATE_LOGDIR -eq 1 ]; then
create_default_dir "$CELERYBEAT_LOG_DIR"
fi
if [ $CELERY_CREATE_RUNDIR -eq 1 ]; then
create_default_dir "$CELERYBEAT_PID_DIR"
fi
}
create_paths() {
create_default_dir "$CELERYBEAT_LOG_DIR"
create_default_dir "$CELERYBEAT_PID_DIR"
}
export PATH="${PATH:+$PATH:}/usr/sbin:/sbin"
stop() {
[[ ! -f "$CELERYBEAT_PID_FILE" ]] && echo "$prog is stopped" && return 0
local one_failed=
echo -n $"Stopping $prog: "
# killproc comes from 'functions' and brings three nice features:
# 1. sending TERM, sleeping, then sleeping more if needed, then sending KILL
# 2. handling 'success' and 'failure' output
# 3. removes stale pid files, if any remain
killproc -p "$CELERYBEAT_PID_FILE" -d "$SLEEP_SECONDS" $prog || one_failed=true
echo
[[ "$one_failed" ]] && return 1 || return 0
}
start() {
echo -n $"Starting $prog: "
# If Celery is already running, bail out
if [[ -f "$CELERYBEAT_PID_FILE" ]]; then
echo -n "$prog is already running. Use 'restart'."
failure
echo
return 1
fi
$CELERYBEAT $CELERYBEAT_OPTS $DAEMON_OPTS --detach \
--pidfile="$CELERYBEAT_PID_FILE" \
--logfile="$CELERYBEAT_LOG_FILE" \
--loglevel="$CELERYBEAT_LOG_LEVEL"
if [[ "$?" == "0" ]]; then
# Sleep a few seconds to give Celery a chance to initialize itself.
# This is useful to prevent scripts following this one from trying to
# use Celery (or its pid files) too early.
sleep $SLEEP_SECONDS
if [[ -f "$CELERYBEAT_PID_FILE" ]]; then
success
echo
return 0
else # celerybeat succeeded but no pid files found
failure
fi
else # celerybeat did not succeed
failure
fi
echo
return 1
}
check_status() {
status -p "$CELERYBEAT_PID_FILE" $"$prog" || return 1
return 0
}
case "$1" in
start)
check_dev_null
check_paths
start
;;
stop)
check_dev_null
check_paths
stop
;;
status)
check_status
;;
restart)
check_dev_null
check_paths
stop && start
;;
*)
echo "Usage: /etc/init.d/$prog {start|stop|restart|status}"
exit 3
;;
esac
exit $?
1
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