How to Use Docker Configs for Configuration Management

Docker configs allow you to manage configuration files in a secure and scalable way. This article explains how to use Docker configs for configuration management.

Creating a Docker Config

Create a config from a file:

echo "server {
    listen 80;
    server_name example.com;
}" > nginx.conf
docker config create my_nginx_config nginx.conf

Using Configs in a Service

Deploy a service using the config:

docker service create --name my_service --config my_nginx_config nginx

Accessing Configs in a Container

Inside the running container, configs are accessible as files in the /etc/docker/configs directory.

Managing Configs

List all configs:

docker config ls

Remove a config:

docker config rm my_nginx_config

Conclusion

Docker configs provide a secure and efficient way to manage configuration files for your Docker services, ensuring consistency and simplifying deployments.