MongoD cannot open mongod.log

[Sheldon]

I set-up an AWS instance following the instructions here:

http://www.mongodb.org/display/DOCS/Amazon+EC2+Quickstart#AmazonEC2Quickstart-ConnectToMongoDB

When I attempt to run MongoD I get the following error:

[ec2-user@<the instance ip> ~]$ sudo /etc/init.d/mongod start

Starting mongod: can't open [/var/log/mongo/mongod.log] for log file: errno:13 Permission denied [FAILED]

"ls -la /var/log/mongo/" gives the following:

drwxr-xr-x 2 mongod mongod 4096 Mar 19 17:41 .

drwxr-x--- 10 root   root   4096 Mar 19 17:41 ..

-rw-r-----  1 mongod mongod    0 Feb 28 18:34 mongod.log

The permissions look correct.  Any idea why MongoD cannot access the log file?

[Scott Hernandez]

Always best to su to the user and try manually to verify permissions.

Are you sure your init script is running as mongod?

Looks like that user can't read from /var/log/ (if I'm reading it
right on my tiny phone screen).

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[Wes Freeman]

Yeah, you need execute permissions on the folder that the file is in,
in order to write to files there. mongod looks like it doesn't have
that for /var/log/

Wes

[Timothy Hawkins]

Why do you need execute? , wont write do?

Sent from my iPad

[Wes Freeman]

Execute permissions on a directory allow you to list the files there,
which is needed to be able to open the file for writing, among other
things. And you need that permission on directories all the way up the
path.

Wes

[Sheldon]

Thank-you for the feedback.  Permissions on the parent folder was my issue.  I had assumed that the user 'mongod' had rights to access /var/log/mongo/, even though the parent directory (/var/log/) was owned by root.  I executed "chmod 755 ." in /var/log/ and mongod now runs without error.

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