How to get the output from docker run -i

dotcloud docker
Naveed picture Naveed · Apr 26, 2013 · Viewed 19.5k times · Source

docker run normally returns the output of the command it runs. I need to pass some data to docker, run a command that processes the data, and return the output. When I use the -i option, no output is returned. Consider this simple example:

echo hello | docker run -i base wc

It returns no output. How can I get the output from docker when using the -i option?

Answer

Naveed picture Naveed · May 3, 2013

The solution I came up with is:

ID=$(echo hello | docker run -i -a stdin base wc)
docker logs $ID

I'm not sure if this is the best way, but it works.

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