How to resolve error :dbpath (/data/db/) does not exist permanently in MongoDB

Question

I have installed mongodb in my Ubuntu 10.04.

I know that when it comes to start the mongodb server with the command "mongod",then it expects /data/db folder and it can be easily resolved by creating "/data/db/". One more way is to provide your own path using mongod --dbpath "path",when we intend to give our own custom path for db.

But while going through http://docs.mongodb.org/manual/tutorial/install-mongodb-on-ubuntu/ link i found that there is a configuration file.

I made the following changes to it.

# mongodb.conf

dbpath=/EBS/Work/mongodb/data/db/


logpath=/EBS/Work/mongodb/mongodb.log

logappend=true

But still when I try to start the server with "mongod" it throws the same error i.e error :dbpath (/data/db/) does not exist . I wanted to know that how can I permanently redirect my dbpath to my own custom folder cause everytime you don't want to type the path using "mongod --dbpath path".Rather we look to make some changes in configuration file.

Answer 1

If you are using mac catalina:

mongod --dbpath=/Users/user/data/db leave this window

then you can type in another window.

mongo

show dbs

Answer 2

Here is how I got this resolved, simply by following their official Doc . HERE.

Step by step from teminal (running ubuntu) :

1. cd into /srv folder =>> cd /srv/
2. make directory =>> mkdir -p mongodb
3. From within /srv/ give the newly created mongodb folder the right permissions and group ......
4. Lastly, run this => mongod --dbpath /srv/mongodb/

"step by step" Copy of the terminal ...... :)

 ~$ mongod 
    Tue Jun  3 20:27:39.564 [initandlisten] MongoDB starting : pid=5380 port=27017 dbpath=/srv/mongodb/ 64-bit host= -SVE1411EGXB
    Tue Jun  3 20:27:39.564 [initandlisten] db version v2.4.10
    Tue Jun  3 20:27:39.564 [initandlisten] git version: e3d78955d181e475345ebd60053a4738a4c5268a
    Tue Jun  3 20:27:39.564 [initandlisten] build info: Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_49
    Tue Jun  3 20:27:39.564 [initandlisten] allocator: tcmalloc
    Tue Jun  3 20:27:39.564 [initandlisten] options: { dbpath: "/srv/mongodb/" }
    Tue Jun  3 20:27:39.565 [initandlisten] exception in initAndListen: 10296 
    *********************************************************************
     ERROR: dbpath (/srv/mongodb/) does not exist.
     Create this directory or give existing directory in --dbpath.
     See http://dochub.mongodb.org/core/startingandstoppingmongo
    *********************************************************************
    , terminating
    Tue Jun  3 20:27:39.565 dbexit: 
    Tue Jun  3 20:27:39.565 [initandlisten] shutdown: going to close listening sockets...
    Tue Jun  3 20:27:39.565 [initandlisten] shutdown: going to flush diaglog...
    Tue Jun  3 20:27:39.565 [initandlisten] shutdown: going to close sockets...
    Tue Jun  3 20:27:39.565 [initandlisten] shutdown: waiting for fs preallocator...
    Tue Jun  3 20:27:39.565 [initandlisten] shutdown: lock for final commit...
    Tue Jun  3 20:27:39.565 [initandlisten] shutdown: final commit...
    Tue Jun  3 20:27:39.565 [initandlisten] shutdown: closing all files...
    Tue Jun  3 20:27:39.565 [initandlisten] closeAllFiles() finished
    Tue Jun  3 20:27:39.565 dbexit: really exiting now
         ~$ mongod --dbpath /srv/mongodb/
    Tue Jun  3 20:27:55.616 [initandlisten] MongoDB starting : pid=5445 port=27017 dbpath=/srv/mongodb/ 64-bit host= -SVE1411EGXB
    Tue Jun  3 20:27:55.616 [initandlisten] db version v2.4.10
    Tue Jun  3 20:27:55.616 [initandlisten] git version: e3d78955d181e475345ebd60053a4738a4c5268a
    Tue Jun  3 20:27:55.616 [initandlisten] build info: Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_49
    Tue Jun  3 20:27:55.616 [initandlisten] allocator: tcmalloc
    Tue Jun  3 20:27:55.616 [initandlisten] options: { dbpath: "/srv/mongodb/" }
    Tue Jun  3 20:27:55.617 [initandlisten] exception in initAndListen: 10296 

     ~$ sudo service mongodb start
start: Job is already running: mongodb
     ~$ sudo service mongodb stop
mongodb stop/waiting
     ~$ cd /srv/
     ~$~$/srv$ ls
     ~$ /srv$ mkdir mongodb
     ~$ sudo chgrp   /srv
     ~$ sudo chmod 775 /srv
     ~$ cd /srv/
     /srv$ ls
     /srv$ mkdir mongodb
     /srv$ ls mongodb
     /srv$ cd
     ~$ mongod --dbpath /srv/mongodb/
Tue Jun  3 20:40:57.457 [initandlisten] MongoDB starting : pid=6018 port=27017 dbpath=/srv/mongodb/ 64-bit host= -SVE1411EGXB
Tue Jun  3 20:40:57.457 [initandlisten] db version v2.4.10
Tue Jun  3 20:40:57.457 [initandlisten] git version: e3d78955d181e475345ebd60053a4738a4c5268a
Tue Jun  3 20:40:57.457 [initandlisten] build info: Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_49
Tue Jun  3 20:40:57.457 [initandlisten] allocator: tcmalloc
Tue Jun  3 20:40:57.457 [initandlisten] options: { dbpath: "/srv/mongodb/" }
Tue Jun  3 20:40:57.520 [initandlisten] journal dir=/srv/mongodb/journal
Tue Jun  3 20:40:57.521 [initandlisten] recover : no journal files present, no recovery needed
Tue Jun  3 20:41:00.545 [initandlisten] preallocateIsFaster=true 36.86
Tue Jun  3 20:41:03.489 [initandlisten] preallocateIsFaster=true 35.06
Tue Jun  3 20:41:07.456 [initandlisten] preallocateIsFaster=true 34.44
Tue Jun  3 20:41:07.456 [initandlisten] preallocateIsFaster check took 9.935 secs
Tue Jun  3 20:41:07.456 [initandlisten] preallocating a journal file /srv/mongodb/journal/prealloc.0
Tue Jun  3 20:41:10.009 [initandlisten]         File Preallocator Progress: 985661440/1073741824    91%
Tue Jun  3 20:41:22.273 [initandlisten] preallocating a journal file /srv/mongodb/journal/prealloc.1
Tue Jun  3 20:41:25.009 [initandlisten]         File Preallocator Progress: 933232640/1073741824    86%
Tue Jun  3 20:41:37.119 [initandlisten] preallocating a journal file /srv/mongodb/journal/prealloc.2
Tue Jun  3 20:41:40.093 [initandlisten]         File Preallocator Progress: 1006632960/1073741824   93%
Tue Jun  3 20:41:52.450 [FileAllocator] allocating new datafile /srv/mongodb/local.ns, filling with zeroes...
Tue Jun  3 20:41:52.450 [FileAllocator] creating directory /srv/mongodb/_tmp
Tue Jun  3 20:41:52.503 [FileAllocator] done allocating datafile /srv/mongodb/local.ns, size: 16MB,  took 0.022 secs
Tue Jun  3 20:41:52.517 [FileAllocator] allocating new datafile /srv/mongodb/local.0, filling with zeroes...
Tue Jun  3 20:41:52.537 [FileAllocator] done allocating datafile /srv/mongodb/local.0, size: 64MB,  took 0.02 secs
Tue Jun  3 20:41:52.538 [websvr] admin web console waiting for connections on port 28017
Tue Jun  3 20:41:52.538 [initandlisten] waiting for connections on port 27017

Answer 3

Assuming you have followed the instructions to install a packaged version of MongoDB, you should be starting and stopping mongod using service.

To start mongod:

 sudo service mongodb start

To stop mongod:

 sudo service mongodb stop

If you use the service command to start and stop, it should be using the configuration file: /etc/mongodb.conf.

Starting mongod from the command line

If you run mongod directly instead of using the service definition, you will also have to specify a configuration file as a command line parameter if you want one to be used:

mongod --config /etc/mongodb.conf

Answer 4

1. Find mongo log file from root system folder

sudo find / -name "mongodb.log" -type f

result: /var/log/mongodb/mongodb.log

2. open /var/log/mongodb/mongodb.log

3. search for last "exception" word

4. try to correct exception

In my case exception was the next: 2015-07-30T15:09:15.806+0300 [initandlisten] exception in initAndListen: 13597 can't start without --journal enabled when journal/ files are present, terminating

I made the next:

1. cd /var/lib/mongodb
2. rm -r journal/

Answer 5

Change the user of the new data directory:

chown mongodb [rute_directory]

And try another time to start the mongo service

service mongodb start

I solve the same problem with this.