Lesson 4 of 6
Ports & Volumes
Expose network services and persist data outside a container layer.
Introduction
Port publishing maps a host port to a port inside the container.
Volumes persist or share data independently of the container lifecycle.
Key insight
Expose network services and persist data outside a container layer.
Example
docker run -p 3000:3000 -v app-data:/data my-appRead the example line by line, then try changing one value.
Real-world example
Ports & Volumes helps developers build useful applications.
Practice challenge
Which host port receives traffic in the example command?