Adding ENV to use socket proxy

[sando38]

It would be nice to also configure the agent to use a socket proxy like the main app can:

Swarmpits behavior can be reconfigured via Environment Variables.
SWARMPIT_DOCKER_SOCK

Docker SOCK location used by docker client. In case of socket proxy use following format: http://TCPENDPOINT:2375. Default is /var/run/docker.sock.

Thanks in advance, also for any hints, ideas, considersations in the meantime :)

[kaysond]

Bump. Can someone on the swarmpit team point us in the right direction for a PR?

[kaysond]

Looks like you might be able to do it just by setting the DOCKER_HOST env var

[mrq1911]

this already works — @kaysond was right. the agent builds its client with client.NewEnvClient(), which reads DOCKER_HOST, DOCKER_API_VERSION, DOCKER_CERT_PATH and DOCKER_TLS_VERIFY from the env.

so DOCKER_HOST=tcp://proxy:2375 (and drop the socket mount) works today, no code change. the proxy needs to allow containers-list, container-stats, events and logs. it was just never documented — #20 doesn't cover it, so i'll add it to the readme parameters list.