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creating a sub-domain from a domain configured another server

Posted April 28, 2018 2.4k views
MongoDBDNSLet's EncryptUbuntu 18.04

Hi,

I created an instance on DO for hosting mongo as my current host does not offer it. I want to make a subdomain for that mongo instance so that I can add SSL, but curious if I can do that if my domain is pointed at a different server.

I own the domain name so I can configure it however I want but I’ve never done such a thing and wanted to know if its possible and how.

Thanks

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elomonaco
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elomonaco

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2 answers
jasonjpeters April 29, 2018

This can be done.

after installing mongodb on your droplet…

Setup your subdomain to point at the IP of your droplet.
Install certbot for Letsencrypt - https://certbot.eff.org/
You will need to setup and configure a webserver to answer certbot on port 80 - NGINX and/or HAProxy should suffice

After a successful cert issue you should be able to configure mongo with the LE cert - you may need to leave HA/NGINX in place to answer on port 80 for the renewals

I would suggest using HAProxy as you can configure all your http traffic through there on the droplet.

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  • elomonaco May 1, 2018

    Thanks for the information.

    the domain I was going to use is kinda tied up so I’m going to buy a different domain name and use that instead as I was planning on making a website on DO soonish, so it’ll be better off that way and keep everything under the DO umbrella.

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shivanand April 29, 2018

I’m not very familiar with mongo still let me see if I can help.

Yes it’s totally possible to use SSL for the domain as well as subdomain. Subdomains are nothing more that an A or a CNAME record. SSLs work over any port so just make sure that port is accessible on the internet.

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