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davidshen84
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Joined: 09 Aug 2008
Posts: 314
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 Posted: Sun Oct 21, 2018 10:29 am Post subject: Container port mapping only work once per restart |
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Hi,
My system info.
Gentoo 64 bit
Docker version 18.03.1-ce, build 9ee9f40
After I installed and started the docker service, I was able to launch the nginx container and access the welcome page.
| Code: | | docker run --rm -p 80:80 nginx:latest |
But after I killed the container, and re-launch it with the same command, the container can start, but I cannot access the welcome page at http://localhost:80. I also found the browser did not say the connection was refused, instead, it just waits forever.
If I restart the docker service, I was able to create a new nginx container and access the welcome page. But, if I kill the container, the same issue re-occurs.
It feels like the port mapping function only works once.
Thanks,
D.
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davidshen84
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Joined: 09 Aug 2008
Posts: 314
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| Posted: Tue Oct 23, 2018 7:41 am Post subject: |
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Nobody uses docker on Gentoo, or I posted in the wrong section?
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forrestfunk81
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Joined: 07 Feb 2006
Posts: 565
Location: münchen.de
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| Posted: Mon Oct 29, 2018 4:06 pm Post subject: |
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I stumbled upon the same problem some time ago. But usually I declare the exposed ports within a Dockerfile and build the container manually. Changing the ports works with this approach.
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guitou
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Joined: 02 Oct 2003
Posts: 534
Location: France
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| Posted: Wed Oct 31, 2018 12:42 pm Post subject: |
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Hello.
I might be completely wrong, but I suppose running the container sets up a "network", while stopping the container does not remove this same network, thus leaving port 80 busy (mapping to an obsolete container).
EDIT: If I am not wrong, then maybe simply running the following command might help:
| Code: | | docker network prune |
++
Gi) |
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