Is mongodb running?

Question

I have installed mongodb and the PHP drivers on my UNIX server.

My question is how can I tell if mongodb is running? Is there a simple command-line query to check status? If I start it once from the shell will it keep running if I exit the shell (this doesn't seem to be the case)? How can I make the mongodb connection persistent and auto-start on server reboot?

I can run:

-bash-3.2$ su

Password:

[root@xxx]# cd /var/lib

[root@xxx]# ./mongodb-linux-i686-1.6.5/bin/mongod

./mongodb-linux-i686-1.6.5/bin/mongod --help

for help and startup options

Wed Feb 23 08:06:54 MongoDB starting : pid=7271 port=27017 dbpath=/data/db/ 32-bit

** NOTE: when using MongoDB 32 bit, you are limited to about 2 gigabytes of data

** see http://blog.mongodb.org/post/137788967/32-bit-limitations

** WARNING: You are running in OpenVZ. This is known to be broken!!!

Wed Feb 23 08:06:54 db version v1.6.5, pdfile version 4.5

Wed Feb 23 08:06:54 git version: 0eb017e9b2828155a67c5612183337b89e12e291

Wed Feb 23 08:06:54 sys info: Linux domU-12-31-39-01-70-B4 2.6.21.7-2.fc8xen #1 SMP Fri

Feb 15 12:39:36 EST 2008 i686 BOOST_LIB_VERSION=1_37

Wed Feb 23 08:06:54 [initandlisten] waiting for connections on port 27017

Wed Feb 23 08:06:54 [websvr] web admin interface listening on port 28017

If I open a seperate shell I can then then connect to mongodb:

-bash-3.2$ cd /var/lib

-bash-3.2$ ./mongodb-linux-i686-1.6.5/bin/mongo

MongoDB shell version: 1.6.5

connecting to: test

db.foo.find()

{ "_id" : ObjectId("4d63d7d3eb95985ab19c8feb"), "a" : 1 }

However if I close the initial shell I can't connect:

-bash-3.2$ cd /var/lib

-bash-3.2$ ./mongodb-linux-i686-1.6.5/bin/mongo

MongoDB shell version: 1.6.5

connecting to: test

Wed Feb 23 08:25:10 Error: couldn't connect to server 127.0.0.1 (anon):1154

exception: connect failed

Answer 1

To check whether mongodb is running or not check with either:

ps -edaf | grep mongo | grep -v grep 

OR

/etc/init.d/mongodb status 

/etc/init.d/mongod status 

OR

service mongod status