How to configure Nginx proxy server in Docker container to support dynamic SSL certificates?

How to configure Nginx proxy server in a Docker container to support dynamic SSL certificates

Introduction
In modern web applications, security is crucial. To protect user data and privacy, encrypting data transmission using an SSL certificate is essential. This article will introduce how to configure the Nginx proxy server in a Docker container to support automatic application and renewal of dynamic SSL certificates.

Background knowledge
Before getting into the specific steps, you need to understand the following key concepts:

• Docker: a containerization technology that can connect applications with their dependencies Packaged into a portable container called a container.
• Nginx: A high-performance web server and reverse proxy server software.
• Let's Encrypt: A certificate authority that provides free SSL certificates.

Steps

Step One: Install Docker
Before you begin, you need to install Docker on your system. You can visit the Docker official website (https://www.docker.com/) to get the installation guide.

Step 2: Create Nginx proxy server container
Create a Docker container named "nginx-proxy" on your system, and map the host's 80 port and 443 port to the inside of the container Port 80 and port 443.

docker run -d 
  --name nginx-proxy 
  -p 80:80 
  -p 443:443 
  jwilder/nginx-proxy

Step 3: Create a Let's Encrypt container
In order to automatically apply for and update SSL certificates, we need to run a Let's Encrypt container in Docker. This container will connect with the Nginx proxy server container and automatically apply for and renew SSL certificates using the ACME protocol.

First, create a Docker container named "nginx-letsencrypt" and connect it to the "nginx-proxy" container.

docker run -d 
  --name nginx-letsencrypt 
  --volumes-from nginx-proxy 
  -v /var/run/docker.sock:/var/run/docker.sock:ro 
  jrcs/letsencrypt-nginx-proxy-companion

Step 4: Configure SSL certificate generation
In order for the Let's Encrypt container to automatically apply for and update SSL certificates for your domain names, you need to configure the corresponding environment for each domain name that wants to use an SSL certificate. variable.

Edit your application container's docker-compose.yml file and add the following code to your application service:

environment:
  - VIRTUAL_HOST=your-domain.com
  - LETSENCRYPT_HOST=your-domain.com
  - LETSENCRYPT_EMAIL=your-email-address@example.com

Replace "your-domain.com" with your domain name and replace "your-email-address@example.com" with your email address.

Step 5: Restart the container
In your application service directory, run the following command to restart your container:

docker-compose up -d

If everything goes well, your Nginx proxy server container will It will automatically apply for and renew an SSL certificate for your domain name. You can verify that the SSL certificate was successfully installed by visiting https://your-domain.com.

Conclusion
By configuring the Nginx proxy server in the Docker container, we can automatically apply for and update SSL certificates to improve the security of network applications. This method of dynamic SSL certificate management ensures that your application always uses a valid SSL certificate, protecting user data and privacy.

The above is how to configure the Nginx proxy server in a Docker container to support dynamic SSL certificates. Hope this helps!

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