Mongodb – What are each of the separate mongodb-org packages for ubuntu

the problem seems to be the version of mongodb. Somehow for mongodb < 2.6 socket problem will intermittently occurs. When it occurs, you have to restart your mongos node.

When you create the self signed certificate, you need to use a valid host name in the "Common Name" field, e.g.:

Common Name (eg, your name or your server's hostname) []: host.domain.com

If you want use a domain certificate, you need to change "host" with "*", e.g.:

Common Name (eg, your name or your server's hostname) []: *.domain.com