non www to www apache2 Letscrypt certbot - apache

Question

I want to redirect my non-www to www .
SSL working fine and both url working fine with ssl.
https://example.com
https://www.example.com
both working but I want to redirect https://example.com to https://www.example.com
I am working with lamp-server in AWS ec2 and using certbot for ssl.
My apache config.
<VirtualHost *:80>
ServerName www.example.com
ServerAlias example.com
ServerAdmin admin#example.com
DocumentRoot /var/www/html
<Directory /var/www/html/>
Options Indexes FollowSymLinks
AllowOverride All
Require all granted
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
<IfModule mod_dir.c>
DirectoryIndex index.php index.pl index.cgi index.html index.xhtml index.htm
</IfModule>
RewriteEngine on
RewriteCond %{SERVER_NAME} =example.com [OR]
RewriteCond %{SERVER_NAME} =www.example.com
RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} [END,NE,R=permanent]
</VirtualHost>
I tried many online tutorials but nothing helped, Thanks in advance for any help or support.

Answer 1

Try (note: Apache may throw errors if the comments starting with # are not removed):
# turns on the rewrite engine
RewriteEngine On
# checks if domain is not www.example.com
RewriteCond %{HTTP_HOST} !^www\.example\.com$ [NC]
# redirects to www.example.com
RewriteRule ^ https://www\.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
# the above is enough for 443 VirtualHost
# checks if https is not on
RewriteCond %{HTTPS} !on
# redirects to https on the same domain
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
So, your full configuration:
<VirtualHost *:80>
ServerName www.example.com
ServerAlias example.com
ServerAdmin admin#example.com
DocumentRoot /var/www/html
<Directory /var/www/html/>
Options Indexes FollowSymLinks
AllowOverride All
Require all granted
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
<IfModule mod_dir.c>
DirectoryIndex index.php index.pl index.cgi index.html index.xhtml index.htm
</IfModule>
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.example\.com$ [NC]
RewriteRule ^ https://www\.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
RewriteCond %{HTTPS} !on
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
</VirtualHost>
Add the following to the <VirtualHost *:443> configuration:
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.example\.com$ [NC]
RewriteRule ^ https://www\.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]