Point domain and subdomain from Route53 to DigitialOcean using https - dns

Question

I have two wordpress sites running on two digitialocean droplets.
They both have ssl certificates and redirects all requests to https.
Let's call the first adresse https://my-freenom-domain-1.ml
Let's call the second adresse https://my-freenom-domain-2.ml
I have a domain registered on route53. Let's call the domain my-domain.com.
I'm trying to map (not redirect) all requests from https://my-domain.com to https://my-freenom-domain-1.ml
and all request from https://subdomain.my-domain.com to https://my-freenom-domain-2.ml
How would you do this?
Update:
What I've tried (That didn't work)
Creating a simple CNAME.
CNAME for main domain (my-domain.com):
Cannot create a CNAME for main domain and gives the following error:
RRSet of type CNAME with DNS name my-domain.com. is not permitted at apex in zone my-domain.com.
CNAME for subdomain (subdomain.my-domain.com):
I am able to create a CNAME for the subdomain, but requests are redirected.
So when I go to subdomain.my-domain.com I'm redirected to https://my-freenom-domain-2.ml
Create a S3 "redirect-bucket"
I've tried creating a S3 bucket that redirects all requests for the subdomain.
So bucket named subdomain.my-domain.com, redirects all redirects to https://my-freenom-domain-2.ml (https).
I then created a CNAME for subdomain.my-domain.com pointing to subdomain.my-domain.com.s3-website-eu-west-1.amazonaws.com.
But all requests are still redirected...

Answer 1

You need to create a virtual host for your new domain on your Digital Ocean droplets for it to work.
So I would do following to make it work -
Create virtual host for the new domain on the webserver of droplets,
or add the new domain as server in the webserver config.
Add the SSL certificates of the new domain to the old webserver or alternatively terminate the ssl at the ELB.
Add the DNS CNAME or A record entry for the new domain pointing to the old domain servers.
Post this it should work.

Answer 2

This is based on #mdeora's answer correct answer with some details.
1. Create a virtual host for the domain (my-domain.com) in the droplet
Copy default conf:
sudo cp /etc/apache2/sites-available/000-default.conf /etc/apache2/sites-available/my-domain.com.conf
Add a ServerName to the conf:
<VirtualHost *:80>
ServerAdmin webmaster#localhost
ServerName my-domain.com
DocumentRoot /var/www/html
<Directory /var/www/html/>
Options FollowSymLinks
AllowOverride All
Require all granted
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
Enable the site: a2ensite my-domain.com.conf
Reload apache: systemctl reload apache2
2. Install a ssl certificate on the droplets server
(I did it using certbot)
certbot --apache -d my-domain.com
(follow the certbot instructions)
3. Create an A record in route53
Create an A record and point it to the ip of the droplet.
(4. update wordpress settings)
If you're running a wordpress site be sure to change wordpress url settings in admin to https://my-domain.com.
Now, hopefully, everything should work.