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Apologies for asking two unrelated questions.

  1. what is the best way of accessing the host machine of the docker container (i.e. I am trying to access a kafka instance running on the host, from my docker container so that I can publish some messages)

  2. when I run docker run ..... on an image which I've modified that may have an issue/syntax error, it will naturally not start - is there a log file anywhere that I would be able to take a look at to debug the issue. (this question is somewhat related to the 1st question, since I did what was suggested on another post, but the image is still not starting)

Sash
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2 Answers2

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  1. This is an ongoing discussion on what to use and what not, I don't really know what is best. Using the docker run --net="host" is pretty easy but can be dangerous. See From inside of a Docker container, how do I connect to the localhost of the machine?.

  2. Use docker logs containerid or lookup the raw data in /var/lib/docker/containers/containerid/ for Ubuntu.

Community
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Evers
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  1. You should have no problem connecting to the host using the local lan interface ip address. Suppose you have a host with ip 192.168.0.1:

    docker run --rm -ti ubuntu bash ping 192.168.0.1

should give you a response.

  1. You can use docker logs to see the standard output of your container.
Leandro M Barbosa
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