How to do version checks through a proxy server #56
Description
Hi @timdaman
Everything is working fine so far and I am currently trying to add a few more checks to monitor the Docker containers properly.
I noticed the "--version" check and thought, that this check would check the current version, if so I would certainly like to have this feature implemented in my monitoring, so I can keep track of the current version or get notified as soon as there is a new version.
I seem to however have problems getting this to work, due to our servers working behind a proxy server. The main message appearing is "connection refused" which gave me the hint, that the "check_docker version check" script cannot communicate with the registry server due to the proxy server blocking it.
Would there be a possibility to add a proxy option to the command line, so that people with a proxy server can add their IP/FQDN:Port in the query?
Example: --proxy IP/FQDN:Port
I had a look at your code but my last Python coding lies quite a bit back, so I could only achieve to add a new function would not know where to change the actual query.
If you could implement this feature I would be more than happy to test this for you.