If you want to set up a Docker Compose environment with nested containers, particularly involving DNS resolution and a Python application interacting with the Docker API, you’ll need to configure your
docker-compose.yml file accordingly. Here’s a basic example to get you started:
Let’s assume you have three services:
- Python application using Docker API (
- DNS resolver (e.g.,
- Your main application container (
Here’s a sample
In this example:
python-appis your Python application using the Docker API. Ensure that your Python app’s code properly connects to the Docker daemon using the appropriate Docker SDK (e.g.,
dnsmasqis a DNS resolver. You might need to create a custom Docker image with
dnsmasqconfigured according to your needs.
main-appis your main application container. It will use the DNS resolver (
dnsmasq) for DNS resolution.
Make sure to replace
your-dnsmasq-image with the actual image you want to use for the DNS resolver. You may also need to adjust the paths in the
build section according to your project structure.
This setup ensures that the
main-app services share a custom network (
custom-network), and the
main-app container uses
dnsmasq for DNS resolution. This way, you have a basic structure for nesting containers, using DNS resolution, and interacting with the Docker API from a Python application.
Remember to adapt this example to your specific requirements and make sure your Python application is configured correctly to connect to the Docker daemon inside its container.