Can't expose port with podman

Question

I am trying to walk through a tutorial that brings up an application in a docker/podman container instance.

I have attempted to use -p port:port and --expose port but neither seems to work.

I've ensured that I see the port in a listen state with ss -an.

I've made sure there isn't anything else trying to bind to that port.

No matter what I do, I can never hit localhost:port or ip_address:port.

I feel like I am fundamentally missing something but don't know where to look next.

Any suggestions for things to try or documentation to review would be appreciated.

Thanks,

Shawn

Answer 1

As per Redhat documentation for Containerfile,

EXPOSE indicates that the container listens on the specified network port at runtime. The EXPOSE instruction defines metadata only; it does not make ports accessible from the host .

To specify Port Number,

The -p option in the podman run command exposes container ports from the host.

Example:

podman run -d -p 8080:80 --name httpd-basic quay.io/httpd-parent:2.4

In above example, Port # 80 is the port number which Container listens/exposes and we can access this from outside the container via Port # 8080