Issue
I am trying to start a php script as a daemon in Debian. I also would like it to start on boot as well.
I have been starting using /path/to/php /path/to/script/Insert.php & without issue, and can shell_exec("nohup /path/to/php /path/to/script/Insert.php >/dev/null &") as well. I have tried using the below script, but it does not take the script into an operational state.
Am copying the file to /etc/init.d/ and using update-rc.d without issues. I can use service congen-insert startto 'start' the script, but it doesn't seem to actually run, and it doesn't start doing any work.
What am I missing, or where have I gone wrong with the scripts?
I know there are several ways to work around this, but I am really just trying to understand what I am doing incorrectly or why what I am doing is not working.
Any help or suggestions is extremely appreciated! If there is anything else you need or anything I have missed in my description, please let me know so I can correct it.
Thanks in advance.
Service script
#! /bin/sh
### BEGIN INIT INFO
# Provides: congen-insert
# Required-Start: $local_fs $network
# Required-Stop: $local_fs
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: congen-insert
# Description: DB Insert Daemon
### END INIT INFO
NAME="congen-insert"
DESC=" DB Insert Daemon"
PIDFILE="/var/run/${NAME}.pid"
LOGFILE="/var/log/${NAME}.log"
DAEMON="/path/to/php"
DAEMON_OPTS="/path/to/script/Insert.php"
START_OPTS="--start --background --make-pidfile --pidfile ${PIDFILE} --exec ${DAEMON} ${DAEMON_OPTS}"
STOP_OPTS="--stop --pidfile ${PIDFILE}"
test -x $DAEMON || exit 0
set -e
case "$1" in
start)
echo -n "Starting ${DESC}: "
start-stop-daemon $START_OPTS >> $LOGFILE
echo "$NAME."
;;
stop)
echo -n "Stopping $DESC: "
start-stop-daemon $STOP_OPTS
echo "$NAME."
rm -f $PIDFILE
;;
restart|force-reload)
echo -n "Restarting $DESC: "
start-stop-daemon $STOP_OPTS
sleep 1
start-stop-daemon $START_OPTS >> $LOGFILE
echo "$NAME."
;;
status)
echo -n "Sorry, this isn't implemented yet"
;;
*)
N=/etc/init.d/$NAME
echo "Usage: $N {start|stop|restart|force-reload}" >&2
exit 1
;;
esac
exit 0
Script I am trying to run:
const LoaderPath = __DIR__ . DIRECTORY_SEPARATOR . ".." .DIRECTORY_SEPARATOR . "includes.php";
require_once LoaderPath;
use PhpAmqpLib\Channel\AMQPChannel;
use PhpAmqpLib\Message\AMQPMessage;
use requests\InsertRequest;
$connection = GetRabbitConnection();
$channel = $connection->channel();
$RedisClient = GetRedisClient();
DeclareQueues($connection, $RedisClient);
$MySQLHost = $RedisClient->get(MySQLHostKey);
$MySQLUser = $RedisClient->get(MySQLUserKey);
$MySQLPassword = $RedisClient->get(MySQLPasswordKey);
$MySQLDatabase = $RedisClient->get(MySQLDatabaseKey);
$InsertExchange = $RedisClient->get(Insert.":".Exchange);
$InsertQueue = $RedisClient->get(Insert.":".Queue);
$Prefetch = $RedisClient->get(Insert.":".Prefetch);
$RedisClient->disconnect();
$RedisClient = null;
$mysql= new mysqli($MySQLHost, $MySQLUser, $MySQLPassword, $MySQLDatabase);
$channel->basic_qos(0,$Prefetch,false);
$channel->basic_consume($InsertQueue, $InsertExchange, false, false, false, false, "callback");
echo "Consuming on Exchange $InsertExchange with Queue $InsertQueue\n";
while(true) {
$channel->wait();
}
$channel->close();
function callback(AMQPMessage $message){
global $mysql;
echo "Message received", "\n";
$InsertRequest = new InsertRequest($message->body);
echo "Running Insert Statement\n";
if (!$mysql->query($InsertRequest->SQL)){
echo "Error: ".$mysql->error;
}
/** @type AMQPChannel $channel */
$channel = $message->delivery_info['channel'];
$channel->basic_ack($message->delivery_info['delivery_tag']);
echo "Insert Complete\n";
}
Solution
The issue was in the redirection of the output. I also modified the php file with a header for bash so it does not show as multiple php processes in top, but shows the file name instead:
Revised Service Script:
#! /bin/sh
### BEGIN INIT INFO
# Provides: congen-insert
# Required-Start: $local_fs $network
# Required-Stop: $local_fs
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: congen-insert
# Description: ConGen DB Insert Daemon
### END INIT INFO
NAME="congen-insert"
DESC="DB Insert Process for ConGen"
PIDFILE="/var/run/${NAME}.pid"
LOGFILE="/var/log/${NAME}.log"
DAEMON="/var/congen/php/controllers/congen-insert"
DAEMON_OPTS="> /dev/null 2>&1"
START_OPTS="--start --background --make-pidfile --pidfile ${PIDFILE} --exec ${DAEMON} ${DAEMON_OPTS}"
STOP_OPTS="--stop --pidfile ${PIDFILE}"
test -x $DAEMON || exit 0
set -e
case "$1" in
start)
echo -n "Starting ${DESC}: "
start-stop-daemon $START_OPTS >> $LOGFILE
echo "$NAME."
;;
stop)
echo -n "Stopping $DESC: "
start-stop-daemon $STOP_OPTS
echo "$NAME."
rm -f $PIDFILE
;;
restart|force-reload)
echo -n "Restarting $DESC: "
start-stop-daemon $STOP_OPTS
sleep 1
start-stop-daemon $START_OPTS >> $LOGFILE
echo "$NAME."
;;
status)
echo -n "Sorry, this isn't implemented yet"
;;
*)
N=/etc/init.d/$NAME
echo "Usage: $N {start|stop|restart|force-reload}" >&2
exit 1
;;
esac
exit 0
Revised PHP Script to run:
#!/php52/php-5.6.6/bin/php
<?php
const LoaderPath = __DIR__ . DIRECTORY_SEPARATOR . ".." . DIRECTORY_SEPARATOR . "includes.php";
require_once LoaderPath;
use PhpAmqpLib\Channel\AMQPChannel;
use PhpAmqpLib\Message\AMQPMessage;
use requests\InsertRequest;
$connection = GetRabbitConnection();
$channel = $connection->channel();
$RedisClient = GetRedisClient();
DeclareQueues($connection, $RedisClient);
$InsertExchange = $RedisClient->get(Insert.":".Exchange);
$InsertQueue = $RedisClient->get(Insert.":".Queue);
$Prefetch = $RedisClient->get(Insert.":".Prefetch);
$RedisClient->disconnect();
$RedisClient = null;
$mysql= ConnectionBuilder::GetMySQLi();
$channel->basic_qos(0,$Prefetch,false);
$channel->basic_consume($InsertQueue, $InsertExchange, false, false, false, false, "callback");
echo "Consuming on Exchange $InsertExchange with Queue $InsertQueue\n";
while(true) {
$channel->wait();
}
$channel->close();
function callback(AMQPMessage $message){
global $mysql;
echo "Message received", "\n";
$InsertRequest = new InsertRequest($message->body);
echo "Running Insert Statement\n";
if (!$mysql->query($InsertRequest->SQL)){
echo "Error: ".$mysql->error;
}
/** @type AMQPChannel $channel */
$channel = $message->delivery_info['channel'];
$channel->basic_ack($message->delivery_info['delivery_tag']);
echo "Insert Complete\n";
}
After adding the file to /etc/init.d/ and making both the php script and service script executable, I can start the service using service congen-insert start and use the rest of the commands just like any other init.d service.
It should be noted that I am redirecting the console to /dev/null, but you could also redirect to a file by replacing the /dev/null with a writable path.
An explanation of the 2>&1 quoted from another SO post "2 is the stream number for stderr (error messages), 1 is represents [sic] the stdout stream (the standard non-error output stream)." as such I am essentially redirecting stdout to /dev/null and redirecting stderr to stdout
Answered By - chaosaffe Answer Checked By - Clifford M. (WPSolving Volunteer)