I'm writing a CMS with the Laravel as a backend and Vue.js as a frontend. So far, I had no problems with the application, however, when I tried to create Scheduler to manage tasks from the frontend, I'm not able to run these tasks with provided Laravel cron task:
* * * * * php /var/www/html/artisan schedule:run >> /dev/null 2>&1
Well, actually I can, if I redirect the output of the CRON to the file and not /dev/null, Laravel is telling me that the job is executed successfully, however, nothing is happening.
To test out that created Scheduler class is able to call the jobs at an assigned times, I've written small node.js notification application, which simply sends the system notification.
In case if I'm calling the php artisan schedule:run myself, I have no problem with receiving this notification, and yet again, I have a new entry in the log file telling me that job executed successfully.
But when CRON executes the same artisan command, the only thing I get is entry in the log file but no notification.
I'm running Apache server under the same user which has this cron entry and the node.js script is placed under in the home path of this same user. So from here I've no idea why this might happen.
P.S. This is the interface which basically shows how the crontab is edited and what I'm adding to it to make this thing work (but for some reason it is just spitting messages to log without actually doing anything):
And this is how the task looks like:
Laravel provides an easy way for task scheduling. Laravel’s ‘Command Scheduler’ allows you to easily define the schedule of the commands within Laravel itself. When using the scheduler, only one Cron entry is needed on the server.
Related
I want to create a PHP script that will run non stop and execute some instructions every minute/hour (according to my need). It should never die.
How should I proceed to this one? How do I start the script itself?
What Iv'e done so far is created an infinite for loop and checking the time and if it's a new minute then calling my function. But when I call the link, it shows my browser is busy.
I want the script to run on Google Compute Engine without any need to call the URL from a second computer. I want something like android foreground service but for PHP.
Cron job is the answer.
Cron is basically a job scheduling daemon. It runs in the background and is executed automatically. You can set it to run at any time that you wish to. This nature of cron makes it useful for automating tasks.
A cron job, is a task which we carry out with the help of a cron.
So if you run a php script with the help of a cron, it'll run on the background. We don't need to run any infinite loops in the script. You can also set a cron job to run at specific time. How it is run and when it is run is totally upto how you configure the cron job. For that you have to edit the crontab file. A cron tab file is a text file containing a list of commands meant to be run at specified times and the commands in the crontab file along with their run times are checked by the cron daemon, which executes them in the system background.
Now, to create or edit entries in your own cron tab file:
$ crontab -e
Add an entry in the crontab file. One thing you have to remember is, for executing php scripts, use the php executable and call the php script from your crontab as shown in the example below
*/2 * * * * /usr/bin/php /var/www/html/project/cron-file.php
This reference might be helpful to you.
Hope this answer helps.
For Unix-system, best practice for such tasks is using Cron: https://en.wikipedia.org/wiki/Cron
Not only for PHP, but any periodical tasks.
I am going to create Task Shedule in laravel 5.6 in my app. I am working with windows 7 os and my localhost is WAMP. in laravel documentation there is add Cron entries to your server as
* * * * * cd /path-to-your-project && php artisan schedule:run >> /dev/null 2>&1
but I have not any idea about how to add Cron entries with My wamp localhost. my laravel file is in the desktop name as schoolproject then how can add Cron entries with my wamp?
For people who run a local WAMP server and their computer isn't always awake
I spent the past couple months figuring out what would work best.
First, set up your Kernel class and console commands as instructed in the Laravel docs.
In Windows, open Task Scheduler, and create a new task:
In the Triggers section, you can set it like this:
The action should be to run the PHP executable within your WAMP folder (using artisan schedule:run) as the argument:
But then here is an important difference from other tutorials I've seen:
For any tasks that are critical, you'll want to treat them separately.
For example, let's assume you have a task that backs up your database, and you'd like to run this every single day at noon, so your Kernel class has this command in its schedule.
But then you realize a flaw in this approach: if you were out at lunch a few days in a row and left your computer asleep, that noon task would have been missed, and now your backups would be quite stale.
So, remove that daily database backups command from the schedule in Kernel, and instead, then create a second task within Windows Task Scheduler, and set the trigger like:
Then in its Settings tab, you can choose "Run task as soon as possible after a scheduled start is missed":
Therefore, even if your computer is off or asleep at this task's scheduled time, Windows will know to run the task immediately upon waking.
I want to implement a queue for sending out emails in Laravel. I have the queue working fine, but am worried about efficiency. These are my settings:
I have created the jobs table and set up the .env file, to use the queues with my local database.
I have set up this crontab on the server:
* * * * * php /var/www/imagine.dev/artisan schedule:run >> /dev/null 2>&1
And have set up a schedule in app\Conosle\Kernel.php, so I dont have to manually enter the 'queue:listen' every time through console.
$schedule->command('queue:listen');
Now to my question. I would like to know if this is efficient? I am worried about having the queue:listen running all the time in the background consuming cpu and memory.
I have been trying to only run the queue:listen once every 5 minutes, and then put it to sleep with
$schedule->command('queue:listen --sleep 300');
but again, am not sure if this is the best approach.
Another thing I tried is using 'queue:work', but this only processes one queue at a time.
Ideally, I would like a way, to process all the queues every 5 minutes, avoiding a constant use of memory and cpu.
What is the best approach?
Not sure which version of Laravel you're using, but I suspect it's 5.2 or earlier.
You do not need to run this every minute, it continues to run until it's manually stopped.
From Laravel 5.2 documentation:
Note that once this task has started, it will continue to run until it is manually stopped. You may use a process monitor such as Supervisor to ensure that the queue listener does not stop running.
So maybe you want to look into Supervisor
Also, if this is helpful at all, you can chain onto $schedule, ->everyFiveMinutes(). There are several other methods available as well. Laravel Scheduling
I'm trying to make Laravel automatically handle the emailing queue but can't make the task scheduler working. The problem is like:
I already got jobs successfully in the database table, and in Kernel.php:
$schedule->command('queue:work')->everyMinute();
on the remote server I've run this command under the project folder:
* * * * * php artisan schedule:run >> /dev/null 2>&1
But the scheduler still refuse to work, as job still remains in the table. If I manually run
artisan queue:work
the email is sent then.
What am I getting wrong here? Many thanks!
Firstly I would suggest you to not use laravel's command scheduler.
Pros and cons of using laravel's task scheduler:
pros
Your cron task gets embedded to your code. So if you change your server you don't need to remember which all cron tasks you had.
cons
Let's say you have several other cron tasks. Task T1 runs every minute but task T2 runs every day while task T3 runs every Tuesday. Now to just check this you will be running a daemon which will check if every minute of you have any task in queue schedule. Also your queue should respect each jobs and their respective timings.
Instead what you can do is create separate commands for every task. And run cron jobs for them.
But even if you wanted to do what you were doing already or want to know why your cron task was not running, then here is what you were forgetting "running the artisan command in your project directory".
* * * * * cd path_to_your_laravel_project & php artisan schedule:run
I'm developing website that will send email back to user automatically when they registered to my website. I have searched from internet, most of them said that i have to used cron jobs; the big problem foo me now is about cron jobs. I don't how to write it and also how to execute it. Can anyone gives me some example about it?
Thank in advance.
If we assume that the script that you want to run is located at /home/me/myscript.php then all you need to do is create a cron job that will run that script every minute.
Several hosting companies have an interface (cPanel for instance) that will allow you to add a cron task easily. You can also add the cron task by editing the relevant cron job and adding:
*/1 * * * * /usr/bin/php /home/me/myscript.php > /dev/null
If you are wanting to send a confirmation email to the user once they have registered, you can use php mail function to do this.
http://php.net/manual/en/function.mail.php
You can create a PHP file which has a heartbeat event. You put that to sleep using the usleep function with the desired time interval and you can have a list of tasks to be executed (heartbeat tasks), knowing the time rules (when they should run, how often, and so on), and your heartbeat.php will check after each usleep which tasks should be executed and execute it. You can run this heartbeat.php on your server.
However, I do not see the reason why do you need a cron job, heartbeat or any periodic solution. Why don't you send the emails using php functions exactly when you need to send them?