Config crontab for mongod

npk72 · 2024-11-11T07:42:22.269Z

Hi everyone,

While configuration crontab for auto start mongod, I have a problem that it cannot work as schedule, but when I run it by myself, it work. Are there any mistake?

The command I set as below:
– This is cronjob
[root@omnidrp-opsmanager01 ~]# crontab -l
*/1 * * * * sh /root/scripts/mms_check_status.sh

– The script
[root@omnidrp-opsmanager01 ~]# cat scripts/mms_check_status.sh
#!/bin/bash

#check port mms 27019 is running or not
#if not, run command mongod to start
if ! netstat -nltp | grep 27019; then
mongod --port 27019 --dbpath “/mongo/data/appdb” --logpath “/mongo/data/appdb/mongodb.log” --wiredTigerCacheSizeGB 8 --fork
fi

Thank all!

steevej · 2024-11-11T13:27:06.914Z

Your cron job seems to run with user root while it is probably started with another user when you do manually. So you most likely have permission issues on some of the file system resources.

You should not start mongod as root.

You should be using systemctl to start and stop.

npk72 · 2024-11-11T15:35:02.772Z

Hi @steevej,
Can you give me more detail for cronjob, as example?
I confirm that cronjob ran with root user and also when I manually run the script - with root user. I wonder what cause cronjob cannot run mongod command.
Thanks for your help!

steevej · 2024-11-11T16:52:08.730Z

Please share you logs.

Please share the permissions of the files and directories involve.

Please share error messages.

npk72 · 2024-11-12T03:29:09.871Z

There are no log when cronjob running.
All directories and find I defined also have permission and right owner: mongod is owner for data dir and log file.
This is output when I running the script manually. Can you review why it cannot run in crontab schedule?

image1326×63 44.3 KB

Thanks

steevej · 2024-11-13T13:34:24.353Z

I want to repeat that the best is to use systemd timers and units to do what you want to do.

When I write

steevej:

Please share the permissions of the files and directories involve.

I do not want the answer

npk72:

All directories and find I defined also have permission and right owner: mongod is owner for data dir and log file.

I want you to share the output of ls -l of all the files and the output of ls -ld of all the directories involve. With your answer it is impossible for us to know if you are looking at the right place.

And when I write

steevej:

Please share error messages.

I do not want a image or a screenshot. I want text that I can cut-n-paste to try out or to reply.

steevej · 2024-11-20T02:08:35.504Z

@npk72, is there any update on this thread?

Please followup.

npk72 · 2024-11-20T02:32:29.446Z

Sorry @steevej,
I’m still working on this thread.
Thanks for your enthusiasm! I will update as soon as possible.