Added dockerfile and changed personal message #1
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Dockerfile
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| # Run FastAPI server on the port exposed above. | ||
| CMD uvicorn main:app |
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You need to specify the host address here (reason).
Also, you should prefer the array-based syntax for CMD over the string-based syntax (more info here).
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I have made the said changes.
I should have cleared this earlier but,
if I run the docker image normally
docker run myimage
the application starts, however I can't access it, it says port not exposed
if I run the docker image like this
docker run -p 8000:8000 myimage
the application starts fine and I can access it
but if I create an image without the EXPOSE 8000 line in dockerfile and run with the -p label, the application still starts and is accessible
Am I missing something?
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The reason you need to specify -p is because you need to publish ports of your container when running it from a Docker image, in order to have them be accessible from the outside world.
Take a look at this link for more info: https://docs.docker.com/config/containers/container-networking/#published-ports
As for why it still works without the EXPOSE 8000 line, the EXPOSE command doesn't actually do anything other than serving as documentation between the person writing the Dockerfile, and the person running a container from that Dockerfile. If you see EXPOSE <port_no> in a Dockerfile, it indicates that you should include -p <port_num>:<port_num> when running a container from an image from that Dockerfile.
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