If I log into the Heroku site and view my Cron add-on, Heroku will show me:
the next time cron is scheduled to run, and
the last time cron ran.
Is there a way to query this info via heroku CLI (or cleanly obtain this via some other way programatically?)
Thx.
heroku info via cli will give you the last run and next run time
Related
Every time I deploy code to Heroku, it automatically looks to run the start script in package.json (NodeJS)
My app is set to run on a timer / scheduler and as such does not need to be run by Heroku when deployed.
How do I disable this behaviour?
you should create a One-Off Dynos whith a Heroku Scheduler add-on.
I have a requirement of running a node script (not app or dapp), which has no front -end files (html, css). This script will send transactions (call smart contract function) in regular intervals. the only constraint is that this script needs to run perpetually (forever) without stopping, unless a specific command is given by admin. Please do suggest how we could achieve this? Thanks.
PS: in case you have a better platform suggestion other than heroku, those are welcome as well with details. Tx.
Unix cron works fine for this kind of things. Just add a cron in your crontab with command :
crontab -e
Then just set your pattern and add a line with your command to launch, for example this will run each day at 3.00 AM:
0 3 * * * /root/backup.sh
Then don't forget to reload your cron process:
sudo service cron restart
Define your pattern here : https://crontab.guru/
You can have a look at kue.
The good thing about kue is, that it gives you a UI where an admin can view the running, failed, jobs etc. Also, you can configure it to stop a job programmatically.
I have node server that I want to restart whenever it stopped. For this case I setup system cron on ubuntu server to execute a simple bash script that will track node server every minute and log the server status. Now this cron trigger this bash script and logs relevant status every minute but node server doesn't execute(Using simple linux command I can check if node server running or not). When manually running that bash script node server starts but something happening when cron executes that script. I am trying to fix this meanwhile any help will be appreciated.
Thanks
instead of doing this with cron i think you have to use spervisor in order to keep the process running check this supervisor website
I have to run NodeJS application which has to run uninterruptedly, but I need to stop it and restart it every 10 minutes.
I'm Working on a dedicated Ubuntu 18.04 machine.
I have read something about cron but I don't know well how it works. Does it stop the command that was run with it?
You can use forever to run the application, and set up a cron job to restart it in forever every five minutes. As a bonus, forever will also restart it for you if it fails in between cron job executions.
In my knowledge, the cron doesn't stop the command that had run before, but you could add the logic to do that check in your application.
Here you can find an article that shows some solutions to prevent duplicate cron job executions.
I'm trying to run quick php update over cron tab on Cloud9 IDE.
Here is my crontab -l:
*/2 * * * * php /home/ubuntu/workspace/public_html/updater.php
I also tried to use data from "whereis php" instead of simple php, but still nothing.
And here comes my question. Is there any time restriction eg. 1 hour minimum for cron in C9?
Or maybe I'm doing something wrong.
Tried to restart cron already.
Cron daemon is not started. You have to start it manually. Your output from px -aef | grep cron shows that grep is running not cron.
sudo cron start
Please read here, from the C9 FAQ:
We currently do not support cron jobs within Cloud9 workspaces. The way to proceed would be to get a Cloud9 premium plan which allows you to create SSH workspaces
You may need to run the cron daemon to make the cron job run ("service cron start"). However Cloud9 workspaces are paused when they are inactive so it will only run when you're actively logged into the IDE.