Configuring Docker Bridge Networking for Inter-Container Communication
Overview of the Process
Docker bridge networking establishes a virtual network layer that enables commmunication between multiple containers. The following steps outline the configuration process:
| Step | Action |
|---|---|
| 1 | Create a Docker network |
| 2 | Launch containers and attach them to the created network |
| 3 | Validate network connectivity between containers |
Detailed Implementation Steps
1. Creating a Docker Network
Initialize a new Docker network to serve as the communication bridge. Execute the following command:
docker network create app_bridge
This command creates a user-defined bridge network named
app_bridge.
2. Deploying Containers on the Network
Launch two containers and connect them to the app_bridge network. The example uses NGINX images:
docker run -d --name web_server_1 --network app_bridge nginx:alpine
docker run -d --name web_server_2 --network app_bridge nginx:alpine
These commands start two NGINX containers (
web_server_1andweb_server_2) atttached to theapp_bridgenetwork.
3. Testing Inter-Container Connectivity
Access one container's shell to verify network communication with the other container:
docker exec -it web_server_1 sh
This opens an interactive shell (
sh) inside theweb_server_1container.
Within the container shell, test connectivity using ping:
ping web_server_2
A successful response confirms thatt the bridge network is functioning correct, allowing the containers to communicate.
