Updating the SSL certificate for a Web server running in a Docker container¶

To update the SSL certificate, you need to:

1. Enter the nginx-certbot container:

   docker exec -it nginx-certbot /bin/bash
   

   Result: You gain access to the command line inside the container.

2. Create a directory for ACME validation:

   mkdir -p /var/www/html/.well-known/acme-challenge
   

   Result: The necessary directory structure for domain verification is created.

3. Set the correct permissions:

   chown -R www-data:www-data /var/www/html/.well-known
   

   chmod -R 755 /var/www/html/.well-known
   

   Result: The correct permissions are set for the web server.

4. Renew the certificate:

   certbot renew --webroot -w /var/www/html
   

   Result: The certificate renewal process is initiated. A success message will be displayed upon completion.

5. Exit the container:

   exit
   

   Result: You exit the container's command line and return to the main system.

6. Restart the container:

   docker restart nginx-certbot
   

   Result: The container is restarted, applying the new certificate to the web server.