Fedora And Mongodb

30 Nov 2013

If I just follow the official instructions, I get an error everytime:

 systemctl status mongod.service
mongod.service - SYSV: Mongo is a scalable, document-oriented database.
   Loaded: loaded (/etc/rc.d/init.d/mongod)
   Active: failed (Result: timeout) since Sun 2013-09-08 11:26:11 CEST; 51s ago
  Process: 3166 ExecStart=/etc/rc.d/init.d/mongod start (code=exited, status=0/SUCCESS)
   CGroup: name=systemd:/system/mongod.service
           └─3174 /usr/bin/mongod -f /etc/mongod.conf

If you look at the error log, you will find something like this: PID file /var/run/mongo/mongod.pid not readable (yet?) after start. There is a bug report since 01 04 2013 https://jira.mongodb.org/browse/SERVER-9202. So the problem is that the default location to store the pid file is /var/run/mongodb/mongod.pid, but systemd looks at /var/run/mongo/mongod.pid.

To fix this, just change the location in the config file '/etc/mongod.conf': pidfilepath = /var/run/mongo/mongod.pid. My first thought was to create the directory '/var/run/mongo' and change the owner and group to mongod (chown mongod:mongod).

But on most modern systems /var/run is a tempfs file system so you need to create a config file in /lib/tmpfiles.d and add the config file echo “d /var/run/mongo 0755 mongod mongod” > mongo.conf.

##UPDATE It appears that the pid should be stored since Fedora 19 or 20 in /var/run/mongodb and not /var/run/mongo.