Alert for Filesystem check does not work on CentOS 7

[Gergely Dudas]

Hi,

We would like to use monit's filesystem check on CentOS 7, but unfortunately it does not send any alert email.

Here is an example from monitrc what works on Ubuntu:

check filesystem root_fs with path / if space usage > 80% for 1 times within 3 cycles then alert

What's wrong on CentOS 7?

monit-5.25.1-1.el7.x86_64 CentOS 7.5.1804

Thanks!

[Tildeslash]

If alerts works on Ubuntu, but not on CentOS the problem should logically be related to your mail-server configuration. Investigate your set mailserver statement in .monitrc and that your mail server works

[Gergely Dudas]

It is integrated with M/Monit and there is no mailserver setting. Alert works for all of the other checks, only for filesystem check it does not.

[Tildeslash]

Please run monit in debug mode and attach full output:

1.) stop Monit

2.) start it in debug mode: monit -vI

[Gergely Dudas]

There were some errors in M/Monit error.log: 2018-09-17 15:34:54 Operation: execute failed -- SQLException: Cannot add or update a child row: a foreign key constraint fails (mmonit.groupedservices, CONSTRAINT groupedservices_servicegroupid_fk FOREIGN KEY (servicegroupid) REFERENCES servicegroup (id) ON DELETE CASCADE) 2018-09-17 15:35:00 SQLException: Cannot add or update a child row: a foreign key constraint fails (mmonit.statistics, CONSTRAINT statistics_serviceid_fk FOREIGN KEY (serviceid) REFERENCES service (id) ON DELETE CASCADE) when storing hostid 14 statistics

After starting it in debug mode, the error has gone, so now it works.

[Tildeslash]

If the problem will occur again, please attach the debug log (the statistics error and the alert delivery are not related)