use lets encrypt local with Spring Boot

Question

I wanted to do this tutorial

lets encrypt local

but I do not know what to do here:

Add LetsEncrypt LetsEncrypt has policies against generating certificates for certain domains. amazonaws.com is one of them (because they are normally transient). You need to add a CNAME to a personal domain that points to the instance you created. Here I’m using kewp.net.za.

is there any tutorial to do this?

Answer 1

Adding a CNAME is done either in a GUI particular to your DNS service or in files on your own DNS servers.

Each service should have its own administration guide/help section. For example: Digital Ocean (Whichever registrar you register your domain with is also likely to provide a free dns service with a similar web interface.)

Irregardless of where you are adding it, the DNS record's essential fields are always the same: (source wikipedia)

 NAME                    TYPE   VALUE
 --------------------------------------------------
 bar.example.com.        CNAME  foo.example.com.

Here:

• bar.example.com. could be springtutorial.mydomain.com. or just written as springtutorial without a '.' to indicate it is a complete name.
• foo.example.com. would be randomid.amazonaws.com.

So:

 NAME                    TYPE   VALUE
 --------------------------------------------------
 myalias                 CNAME  xyznodenumber.amazonaws.com.