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CertBot SSL with Nginx inside Docker

An Nginx Dockerfile and docker-compose setup that includes the python-certbot-nginx script which helps generating instant SSL certificates for the Nginx proxy.

Setup

  • docker-compose.yml file that composes the Nginx reverse proxy and all other custom Docker images
  • ./nginx directory that contains the Dockerfile of Nginx with a built-in CertBot installation
  • ./letsencrypt directory which acts as a volume for the Nginx image inside docker-compose to maintain the certificate throughout redeployments

Usage

Make sure to include an nginx-volume for letsencrypt as shown in the docker-compose file to maintain the ssl-certificate after a redeployment, otherwise you may get rate-limited for a week for too many re-tries.

  1. Add all your domains (including subdomains) that should have HTTPS to the default-conf file.

  2. docker-compose up -d

  3. Run docker-compose ps to get the name of the running Nginx container & copy it

  4. Execute the Nginx docker container using bash: docker exec -it [name_of_nginx_container] bash

  5. Run the python-certbot-nginx script including all domain names (including subdomains) that should have HTTPS: certbot --nginx -d [domain1] -d [domain2]... And follow the given instructions.

  6. Press Ctrl + d to exit bash

  7. Check if your SSL certificate works here and vist https://[your_domain]


Optional Usage

The Nginx Docker image can also be pulled and integrated to docker-compose directly from Dockerhub under the image name: max37/nginx-ssl:latest. Note that this image exposes the ports 443 and 80 automatically as part of the Dockerfile setup.