Can not start mongod with systemctl if change pidFilePath

Resolving for now. Please reopen in case of any questions.

Hello ,

thank you for the confirmation and sorry for the delay in response.

I looked into how the pid file is managed and has discovered the way to change the path to it (requires root privileges):

1. stop the service with systemctl stop mongod

2. change the value of pidFilePath in /etc/mongod.conf to the new path

3. change the value of PIDFile in /lib/systemd/system/mongod.service to the new path

4. replace all two instances of /var/run/mongod.pid with the new path in /usr/bin/percona-server-mongodb-helper.sh

5. ensure the mongod user has write permissions to the parent directory of the new path

6. run systemctl daemon-reload

7. start the service with systemctl start mongod

Could you please confirm that the described recipe works for you?

Regards,
Konstantin.

thank you for replying. 

Yes, as you said, mongod can start successfully if using original value of pidFilePath. And I also check your mongodb documention,  the value of pidFilePath in /etc/mongod.conf and in mongodb system unit file should be the same. 

How wonderful if i can change pid path in /etc/mongo.conf and it work correctly  the same as dbPath and systemLog!

Hello ,

Please correct me if I'm wrong but there isn't any message in the log you provided that seems to be related to pidFilePath config parameter. Could you please confirm that restoring original value of pidFilePath solves the issue?

Thanks,
Konstantin.