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+#!/bin/sh
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+# ============================================
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+# celeryd - Starts the Celery worker daemon.
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+# ============================================
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+#
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+# :Usage: /etc/init.d/celeryd {start|stop|restart|status}
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+# :Configuration file: /etc/sysconfig/celeryd
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+#
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+# See http://docs.celeryproject.org/en/latest/tutorials/daemonizing.html
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+
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+### BEGIN INIT INFO
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+# Provides: celeryd
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+# Required-Start: $network $local_fs $remote_fs
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+# Required-Stop: $network $local_fs $remote_fs
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+# Default-Start: 2 3 4 5
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+# Default-Stop: 0 1 6
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+# Short-Description: celery task worker daemon
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+### END INIT INFO
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+
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+# Source the centos service helper functions
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+source /etc/init.d/functions
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+# NOTE: "set -e" does not work with the above functions,
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+# which use non-zero return codes as non-error return conditions
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+
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+# some commands work asyncronously, so we'll wait this many seconds
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+SLEEP_SECONDS=5
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+
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+DEFAULT_PID_FILE="/var/run/celery/%n.pid"
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+DEFAULT_LOG_FILE="/var/log/celery/%n.log"
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+DEFAULT_LOG_LEVEL="INFO"
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+DEFAULT_NODES="celery"
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+DEFAULT_CELERYD="-m celery.bin.celeryd_detach"
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+
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+CELERY_DEFAULTS=${CELERY_DEFAULTS:-"/etc/sysconfig/celeryd"}
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+
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+test -f "$CELERY_DEFAULTS" && . "$CELERY_DEFAULTS"
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+
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+# Set CELERY_CREATE_DIRS to always create log/pid dirs.
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+CELERY_CREATE_DIRS=${CELERY_CREATE_DIRS:-0}
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+CELERY_CREATE_RUNDIR=$CELERY_CREATE_DIRS
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+CELERY_CREATE_LOGDIR=$CELERY_CREATE_DIRS
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+if [ -z "$CELERYD_PID_FILE" ]; then
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+ CELERYD_PID_FILE="$DEFAULT_PID_FILE"
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+ CELERY_CREATE_RUNDIR=1
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+fi
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+if [ -z "$CELERYD_LOG_FILE" ]; then
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+ CELERYD_LOG_FILE="$DEFAULT_LOG_FILE"
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+ CELERY_CREATE_LOGDIR=1
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+fi
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+
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+CELERYD_LOG_LEVEL=${CELERYD_LOG_LEVEL:-${CELERYD_LOGLEVEL:-$DEFAULT_LOG_LEVEL}}
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+CELERYD_MULTI=${CELERYD_MULTI:-"celeryd-multi"}
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+CELERYD=${CELERYD:-$DEFAULT_CELERYD}
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+CELERYD_NODES=${CELERYD_NODES:-$DEFAULT_NODES}
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+
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+# This is used to change how Celery loads in the configs. It does not need to
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+# be set to be run.
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+export CELERY_LOADER
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+
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+if [ -n "$2" ]; then
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+ CELERYD_OPTS="$CELERYD_OPTS $2"
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+fi
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+
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+CELERYD_LOG_DIR=`dirname $CELERYD_LOG_FILE`
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+CELERYD_PID_DIR=`dirname $CELERYD_PID_FILE`
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+
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+# Extra start-stop-daemon options, like user/group.
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+if [ -n "$CELERYD_USER" ]; then
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+ DAEMON_OPTS="$DAEMON_OPTS --uid=$CELERYD_USER"
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+fi
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+if [ -n "$CELERYD_GROUP" ]; then
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+ DAEMON_OPTS="$DAEMON_OPTS --gid=$CELERYD_GROUP"
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+fi
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+
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+if [ -n "$CELERYD_CHDIR" ]; then
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+ DAEMON_OPTS="$DAEMON_OPTS --workdir=\"$CELERYD_CHDIR\""
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+fi
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+
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+check_dev_null() {
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+ if [ ! -c /dev/null ]; then
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+ echo "/dev/null is not a character device!"
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+ exit 75 # EX_TEMPFAIL
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+ fi
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+}
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+
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+
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+maybe_die() {
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+ if [ $? -ne 0 ]; then
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+ echo "Exiting: $* (errno $?)"
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+ exit 77 # EX_NOPERM
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+ fi
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+}
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+
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+create_default_dir() {
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+ if [ ! -d "$1" ]; then
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+ echo "- Creating default directory: '$1'"
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+ mkdir -p "$1"
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+ maybe_die "Couldn't create directory $1"
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+ echo "- Changing permissions of '$1' to 02755"
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+ chmod 02755 "$1"
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+ maybe_die "Couldn't change permissions for $1"
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+ if [ -n "$CELERYD_USER" ]; then
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+ echo "- Changing owner of '$1' to '$CELERYD_USER'"
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+ chown "$CELERYD_USER" "$1"
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+ maybe_die "Couldn't change owner of $1"
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+ fi
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+ if [ -n "$CELERYD_GROUP" ]; then
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+ echo "- Changing group of '$1' to '$CELERYD_GROUP'"
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+ chgrp "$CELERYD_GROUP" "$1"
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+ maybe_die "Couldn't change group of $1"
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+ fi
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+ fi
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+}
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+
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+
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+check_paths() {
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+ if [ $CELERY_CREATE_LOGDIR -eq 1 ]; then
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+ create_default_dir "$CELERYD_LOG_DIR"
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+ fi
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+ if [ $CELERY_CREATE_RUNDIR -eq 1 ]; then
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+ create_default_dir "$CELERYD_PID_DIR"
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+ fi
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+}
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+
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+create_paths() {
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+ create_default_dir "$CELERYD_LOG_DIR"
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+ create_default_dir "$CELERYD_PID_DIR"
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+}
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+
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+export PATH="${PATH:+$PATH:}/usr/sbin:/sbin"
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+
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+
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+_get_pid_files() {
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+ [[ ! -d "$CELERYD_PID_DIR" ]] && return
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+ echo $(ls -1 "$CELERYD_PID_DIR"/*.pid 2> /dev/null)
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+}
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+
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+stop() {
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+ local pid_files=$(_get_pid_files)
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+ [[ -z "$pid_files" ]] && echo "celeryd is stopped" && return 0
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+
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+ local one_failed=
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+ for pid_file in $pid_files; do
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+ local pid=$(cat "$pid_file")
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+ echo -n $"Stopping celeryd (pid $pid): "
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+
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+ # killproc comes from 'functions' and brings three nice features:
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+ # 1. sending TERM, sleeping, then sleeping more if needed, then sending KILL
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+ # 2. handling 'success' and 'failure' output
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+ # 3. removes stale pid files, if any remain
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+ killproc -p "$pid_file" -d "$SLEEP_SECONDS" celeryd || one_failed=true
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+ echo
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+ done
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+
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+ [[ "$one_failed" ]] && return 1 || return 0
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+}
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+
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+start() {
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+ echo -n $"Starting celeryd: "
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+
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+ # If Celery is already running, bail out
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+ local pid_files=$(_get_pid_files)
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+ if [[ "$pid_files" ]]; then
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+ echo -n $"celeryd is already running. Use 'restart'."
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+ failure
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+ echo
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+ return 1
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+ fi
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+
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+ $CELERYD_MULTI start $CELERYD_NODES $DAEMON_OPTS \
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+ --pidfile="$CELERYD_PID_FILE" \
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+ --logfile="$CELERYD_LOG_FILE" \
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+ --loglevel="$CELERYD_LOG_LEVEL" \
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+ --cmd="$CELERYD" \
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+ --quiet \
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+ $CELERYD_OPTS
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+
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+ if [[ "$?" == "0" ]]; then
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+ # Sleep a few seconds to give Celery a chance to initialize itself.
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+ # This is useful to prevent scripts following this one from trying to
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+ # use Celery (or its pid files) too early.
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+ sleep $SLEEP_SECONDS
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+ pid_files=$(_get_pid_files)
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+ if [[ "$pid_files" ]]; then
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+ for pid_file in $pid_files; do
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+ local node=$(basename "$pid_file" .pid)
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+ local pid=$(cat "$pid_file")
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+ echo
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+ echo -n " $node (pid $pid):"
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+ success
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+ done
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+ echo
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+ return 0
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+ else # celeryd_multi succeeded but no pid files found
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+ failure
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+ fi
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+ else # celeryd_multi did not succeed
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+ failure
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+ fi
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+ echo
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+ return 1
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+}
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+
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+check_status() {
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+ local pid_files=$(_get_pid_files)
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+ [[ -z "$pid_files" ]] && echo "celeryd is stopped" && return 1
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+ for pid_file in $pid_files; do
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+ local node=$(basename "$pid_file" .pid)
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+ status -p "$pid_file" $"celeryd (node $node)" || return 1 # if one node is down celeryd is down
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+ done
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+ return 0
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+}
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+
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+case "$1" in
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+ start)
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+ check_dev_null
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+ check_paths
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+ start
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+ ;;
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+
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+ stop)
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+ check_dev_null
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+ check_paths
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+ stop
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+ ;;
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+
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+ status)
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+ check_status
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+ ;;
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+
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+ restart)
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+ check_dev_null
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+ check_paths
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+ stop && start
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+ ;;
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+
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+ *)
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+ echo "Usage: /etc/init.d/celeryd {start|stop|restart|status}"
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+ exit 3
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+ ;;
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+esac
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+
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+exit $?
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