Have Squid log to /dev/stdout to stream logs to Cloud Logging

[kunzese]

This PR uses dark Docker voodoo to make the Squid container able to log to /dev/stdout, which then get streamed to Cloud Logging via the COS logging agent.

FYI: @gaspar-chilingarov

[ludoo]

almost calls for docker compose :)

[kunzese]

almost calls for docker compose :)

Good idea - i will adjust this PR.

[ludoo]

almost calls for docker compose :)

Good idea - i will adjust this PR.

you probably need to download docker-compose, which will then fail if there's no public access. :) interested in what you come up with, but this PR is totally fine as is if you want to merge!

[gaspar-chilingarov]

i have a strange feeling about starting container with USER=${squid_user} and then using sudo to get more privileges. Why not to run as a root then?

Also I generally not sure why root permissions are necessary at all, because /dev/std* (link to /proc/self/fd/1) should be writable by the userID which runs the process. Have you checked that it does not work without sudo?

[gaspar-chilingarov]

LGTM :)