MongoDB Service Will Not Start After Initial Setup
I am running Fedora 20 and installed MongoDB per the Red Hat installation guide on the official documentation. I was able to run the mongod daemon as a service without error the very first time but when I shut down my machine and came back, the service refused to start due to some failure.
In my log, listed after the successful run, I see this:
***** SERVER RESTARTED *****
ERROR: Cannot write pid file to /var/run/mongodb/mongod.pid: No such file or directory
If I try starting mongod or running mongod --repair manually, I get this message in a start up failure:
ERROR: dbpath (/data/db) does not exist.
Create this directory or give existing directory in --dbpath.
This is odd considering that in my config file in /etc/mongod.conf, the settings for the database path are as follows:
dbpath=/var/lib/mongo
Finally, if I run this command:
mongod --dbpath /var/lib/mongo
The daemon starts up just fine. However, I am unable to replicate that error free behavior for starting a service.
Can anyone tell me what exactly is wrong and how I can begin running mongod as a service?
EDIT
I get this message if I run mongod --config /etc/mongod.conf:
about to fork child process, waiting until server is ready for connections. forked process: 2702 ERROR: child process failed, exited with error number 1
The /var/run/mongodb directory did not exist, so I created and assigned it to the mongod user. That did not make much of a difference, unfortunately.
My /var/log/mongodb/mongod.log shows this message:
[initandlisten] exception in initAndListen: 10309 Unable to create/open lock file: /var/lib/mongo/mongod.lock errno:13 Permission denied Is a mongod instance already running?, terminating
Answer
What worked for me on Fedora 20: we need to create the temp dir on every boot, and that's handled by systemd-tmpfiles. So, create a file /lib/tmpfiles.d/mongodb.conf and put one line in it:
d /var/run/mongodb 0755 mongod mongod
That seems to handle it on restarts; if you don't want to restart right away, you can execute that with:
sudo systemd-tmpfiles --create mongodb.conf
(See the man pages for systemd-tmpfiles)