What is port 10010?

Port 10010 is primarily known for being used by docker-containerd.

Understanding Port 10010

When dealing with containerization technologies like Docker, specific network ports are used for various internal communications and services. According to community discussions and resources like the one provided, port 10010 is associated with the docker-containerd process.

What is docker-containerd?

• containerd is a core container runtime that manages the complete container lifecycle. This includes pulling images, managing storage, executing containers, supervising running containers, and handling low-level operations.
• It acts as a crucial link between the higher-level Docker daemon (dockerd) and the lower-level runtimes (like runc) that actually execute the containers.

While the Docker daemon (dockerd) typically runs on ports like 2375 or 2376 (though often accessed via a Unix socket), containerd also uses internal communication mechanisms, sometimes exposing gRPC API endpoints or other services on specific ports for interaction or health checks within a container environment.

Port 10010 Usage

The reference confirms that Port 10010 is used by docker-containerd. This usage is often related to internal communication or specific components within the Docker ecosystem, particularly in environments where container health or statistics might be monitored or accessed. It's not a port typically exposed publicly but used internally within the host or network segment running Docker.

Understanding which processes use specific ports like 10010 is vital for:

• Troubleshooting: Diagnosing network issues or conflicts.
• Security: Identifying potential attack surfaces (though internal ports are less exposed than public ones).
• Monitoring: Understanding service dependencies and health.

Summary Table

In summary, if you see activity on port 10010, it's highly likely related to the containerd component of your Docker installation.