399 lines
10 KiB
Bash
Executable File
399 lines
10 KiB
Bash
Executable File
#!/bin/sh -e
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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|force-reload|restart|try-restart|status}
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# :Configuration file: /etc/default/celeryd
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#
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# See http://docs.celeryproject.org/en/latest/tutorials/daemonizing.html#generic-init-scripts
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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 $remote_fs
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Short-Description: celery task worker daemon
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# Description: Controls a celery task worker daemon instance
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### END INIT INFO
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#
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#
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# To implement separate init scripts, copy this script and give it a different
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# name:
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# I.e., if my new application, "little-worker" needs an init, I
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# should just use:
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#
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# cp /etc/init.d/celeryd /etc/init.d/little-worker
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#
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# You can then configure this by manipulating /etc/default/little-worker.
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#
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. /lib/lsb/init-functions
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VERSION=10.0
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echo "celery init v${VERSION}."
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if [ $(id -u) -ne 0 ]; then
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echo "Error: This program can only be used by the root user."
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echo " Unprivileged users must use the 'celery multi' utility, "
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echo " or 'celery worker --detach'."
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exit 1
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fi
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# Can be a runlevel symlink (e.g. S02celeryd)
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if [ -L "$0" ]; then
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SCRIPT_FILE=$(readlink "$0")
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else
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SCRIPT_FILE="$0"
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fi
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SCRIPT_NAME="$(basename "$SCRIPT_FILE")"
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DEFAULT_USER="celery"
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DEFAULT_PID_FILE="/var/run/celery/%n.pid"
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DEFAULT_LOG_FILE="/var/log/celery/%n.log"
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DEFAULT_LOG_LEVEL="INFO"
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DEFAULT_NODES="celery"
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DEFAULT_CELERYD="-m celery worker --detach"
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DEFAULT_ENABLED="false"
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CELERY_DEFAULTS=${CELERY_DEFAULTS:-"/etc/default/${SCRIPT_NAME}"}
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# Make sure executable configuration script is owned by root
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_config_sanity() {
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local path="$1"
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local owner=$(ls -ld "$path" | awk '{print $3}')
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local iwgrp=$(ls -ld "$path" | cut -b 6)
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local iwoth=$(ls -ld "$path" | cut -b 9)
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if [ "$(id -u $owner)" != "0" ]; then
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echo "Error: Config script '$path' must be owned by root!"
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echo
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echo "Resolution:"
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echo "Review the file carefully and make sure it has not been "
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echo "modified with mailicious intent. When sure the "
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echo "script is safe to execute with superuser privileges "
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echo "you can change ownership of the script:"
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echo " $ sudo chown root '$path'"
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exit 1
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fi
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if [ "$iwoth" != "-" ]; then # S_IWOTH
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echo "Error: Config script '$path' cannot be writable by others!"
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echo
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echo "Resolution:"
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echo "Review the file carefully and make sure it has not been "
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echo "modified with malicious intent. When sure the "
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echo "script is safe to execute with superuser privileges "
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echo "you can change the scripts permissions:"
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echo " $ sudo chmod 640 '$path'"
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exit 1
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fi
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if [ "$iwgrp" != "-" ]; then # S_IWGRP
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echo "Error: Config script '$path' cannot be writable by group!"
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echo
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echo "Resolution:"
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echo "Review the file carefully and make sure it has not been "
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echo "modified with malicious intent. When sure the "
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echo "script is safe to execute with superuser privileges "
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echo "you can change the scripts permissions:"
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echo " $ sudo chmod 640 '$path'"
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exit 1
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fi
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}
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if [ -f "$CELERY_DEFAULTS" ]; then
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_config_sanity "$CELERY_DEFAULTS"
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echo "Using config script: $CELERY_DEFAULTS"
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. "$CELERY_DEFAULTS"
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fi
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ENABLED=${ENABLED:-$DEFAULT_ENABLED}
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if [ "$ENABLED" != "true" ]; then
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echo "celery daemon disabled - see $CELERY_DEFAULTS"
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exit 0
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fi
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# Sets --app argument for CELERY_BIN
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CELERY_APP_ARG=""
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if [ ! -z "$CELERY_APP" ]; then
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CELERY_APP_ARG="--app=$CELERY_APP"
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fi
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CELERYD_USER=${CELERYD_USER:-$DEFAULT_USER}
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# Set CELERY_CREATE_DIRS to always create log/pid dirs.
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CELERY_CREATE_DIRS=${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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CELERYD_LOG_LEVEL=${CELERYD_LOG_LEVEL:-${CELERYD_LOGLEVEL:-$DEFAULT_LOG_LEVEL}}
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CELERY_BIN=${CELERY_BIN:-"celery"}
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CELERYD_MULTI=${CELERYD_MULTI:-"$CELERY_BIN multi"}
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CELERYD_NODES=${CELERYD_NODES:-$DEFAULT_NODES}
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export CELERY_LOADER
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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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CELERYD_LOG_DIR=`dirname $CELERYD_LOG_FILE`
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CELERYD_PID_DIR=`dirname $CELERYD_PID_FILE`
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# Extra start-stop-daemon options, like user/group.
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if [ -n "$CELERYD_CHDIR" ]; then
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DAEMON_OPTS="$DAEMON_OPTS --workdir=$CELERYD_CHDIR"
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fi
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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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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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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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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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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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export PATH="${PATH:+$PATH:}/usr/sbin:/sbin"
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_get_pids() {
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found_pids=0
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my_exitcode=0
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for pid_file in "$CELERYD_PID_DIR"/*.pid; do
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local pid=`cat "$pid_file"`
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local cleaned_pid=`echo "$pid" | sed -e 's/[^0-9]//g'`
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if [ -z "$pid" ] || [ "$cleaned_pid" != "$pid" ]; then
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echo "bad pid file ($pid_file)"
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one_failed=true
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my_exitcode=1
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else
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found_pids=1
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echo "$pid"
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fi
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if [ $found_pids -eq 0 ]; then
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echo "${SCRIPT_NAME}: All nodes down"
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exit $my_exitcode
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fi
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done
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}
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_chuid () {
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su "$CELERYD_USER" -c "$CELERYD_MULTI $*"
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}
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start_workers () {
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if [ ! -z "$CELERYD_ULIMIT" ]; then
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ulimit $CELERYD_ULIMIT
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fi
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_chuid $* 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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$CELERY_APP_ARG \
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$CELERYD_OPTS
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}
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dryrun () {
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(C_FAKEFORK=1 start_workers --verbose)
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}
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stop_workers () {
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_chuid stopwait $CELERYD_NODES --pidfile="$CELERYD_PID_FILE"
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}
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restart_workers () {
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_chuid restart $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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$CELERY_APP_ARG \
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$CELERYD_OPTS
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}
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kill_workers() {
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_chuid kill $CELERYD_NODES --pidfile="$CELERYD_PID_FILE"
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}
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restart_workers_graceful () {
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local worker_pids=
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worker_pids=`_get_pids`
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[ "$one_failed" ] && exit 1
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for worker_pid in $worker_pids; do
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local failed=
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kill -HUP $worker_pid 2> /dev/null || failed=true
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if [ "$failed" ]; then
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echo "${SCRIPT_NAME} worker (pid $worker_pid) could not be restarted"
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one_failed=true
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else
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echo "${SCRIPT_NAME} worker (pid $worker_pid) received SIGHUP"
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fi
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done
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[ "$one_failed" ] && exit 1 || exit 0
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}
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check_status () {
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my_exitcode=0
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found_pids=0
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local one_failed=
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for pid_file in "$CELERYD_PID_DIR"/*.pid; do
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if [ ! -r $pid_file ]; then
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echo "${SCRIPT_NAME} is stopped: no pids were found"
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one_failed=true
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break
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fi
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local node=`basename "$pid_file" .pid`
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local pid=`cat "$pid_file"`
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local cleaned_pid=`echo "$pid" | sed -e 's/[^0-9]//g'`
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if [ -z "$pid" ] || [ "$cleaned_pid" != "$pid" ]; then
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echo "bad pid file ($pid_file)"
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one_failed=true
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else
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local failed=
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kill -0 $pid 2> /dev/null || failed=true
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if [ "$failed" ]; then
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echo "${SCRIPT_NAME} (node $node) (pid $pid) is stopped, but pid file exists!"
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one_failed=true
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else
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echo "${SCRIPT_NAME} (node $node) (pid $pid) is running..."
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fi
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fi
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done
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[ "$one_failed" ] && exit 1 || exit 0
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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_workers
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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_workers
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;;
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reload|force-reload)
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echo "Use restart"
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;;
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status)
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check_status
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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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restart_workers
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;;
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graceful)
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check_dev_null
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restart_workers_graceful
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;;
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kill)
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check_dev_null
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kill_workers
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;;
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dryrun)
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check_dev_null
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dryrun
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;;
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try-restart)
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check_dev_null
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check_paths
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restart_workers
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;;
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create-paths)
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check_dev_null
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create_paths
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;;
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check-paths)
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check_dev_null
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check_paths
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;;
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*)
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echo "Usage: /etc/init.d/${SCRIPT_NAME} {start|stop|restart|graceful|kill|dryrun|create-paths}"
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exit 64 # EX_USAGE
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;;
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esac
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exit 0
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