How to configure domain name access for docker applications

Configuring an application to access a specific domain name in a Docker environment requires the following steps: Create a user-defined network and specify the network using the --network option. When running the container, use the --publish option to map the port of the application container to the host port. Add a DNS record in the host system's /etc/hosts file and resolve the custom domain name to the container's IP address. You can access the application using a custom domain name.

Docker application configuration domain name access

How to configure Docker applications to access specific domain names?

Accessing an application using a domain name in a Docker environment requires the following steps:

1. Create a custom network

Create a user-defined Docker network to which the application container will connect.

 <code class="sh">docker network create my-custom-network</code>

2. Map ports and domain names

When the container is running, use the --publish option to map the port of the application container to the host port. At the same time, use --network option to specify a custom network.

 <code class="sh">docker run -d --name my-app \ -p 8080:80 \ --network my-custom-network \ my-app-image</code>

3. Add DNS records

Add a DNS record to the /etc/hosts file of the host system and resolve the custom domain name to the IP address of the container.

 <code>127.0.0.1 my-app.local</code>

4. Access the application using a domain name

Now you can access the application using a custom domain name in your browser:

 <code>http://my-app.local:8080</code>

Other notes:

• Make sure the container is listening on the same ports that are mapped to the host port.
• If you are using Docker Compose, you can configure the domain name in the docker-compose.yml file.
• For increased security, it is recommended to encrypt the connection using a TLS certificate.

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