docker exec web console

This image is originally inspirated by this gist.

The container use socat to bound Docker socket to a TCP port, so that I could avoid to change the http.Post part in the Go server to talk directly to a UNIX socket.

You can launch the container in this way:

docker run \
	--name docker-exec-web-console \
	-p 9999:8888 \
	-v /var/run/docker.sock:/var/run/docker.sock \
	bitbull/docker-exec-web-console

Then you can reach the console at the url http://localhost:9999

It's possible to pass a context path to which the container will responds, using CONTEXT_PATH environment variable:

docker run \
	--name docker-exec-web-console \
	-p 9999:8888 \
	-e "CONTEXT_PATH=/webconsole" \
	-v /var/run/docker.sock:/var/run/docker.sock \
	bitbull/docker-exec-web-console

With the above example, the console will be reachable at the url http://localhost:9999/webconsole

You can select the container to exec into passing its id directly via cid querystring parameter ( eg. http://localhost:9999?cid=<container id> ) or in the prompt that will show at page load.

You can pass the command to execute passing it via cmd querystring parameter ( eg. http://localhost:9999?cid=<container id>&cmd=/bin/sh ), otherwise it default to /bin/bash.

Build the image

The image is based on alpine:latest, so you need to compile the server for Linux with all libs statically linked:

CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .

then you can build as usual:

docker build -t bitbull/docker-exec-web-console .