add -proxy input to configure containerd for windows

[jiefenghe]

What is the problem you're trying to solve

When trying to set up proxy for containerd service in windows, there's multiple options so far

1. set machine level environment variable

[Environment]::SetEnvironmentVariable("HTTP_PROXY", "...", [System.EnvironmentVariableTarget]::Machine)

This is undesired because we might accidentally disclose credentials of the proxy.

2. set process level environment variable

Drive a new service class from System.ServiceProcess.ServiceBase in C#, and then inject the proxy values into c# source code, and then compile and execute that wrapped containerd as the windows service.

But this workaround is cumbersome.

Describe the solution you'd like

Can we provides a way to config proxy for containerd service.

containerd.exe --register-service -proxy ...

Additional context

No response

[kzys]

Setting the environment variable from containerd itself may break if containerd's dependencies make HTTP calls in Go's init(). So the wrapper approach is technically safer.

That being said, I can agree having the flag is convenient.

[dstoffel]

Hi,

We tried to use [Environment]::SetEnvironmentVariable("HTTP_PROXY", "...", [System.EnvironmentVariableTarget]::Machine) + HTTPS and restart containerd srevices to use our proxy but containerd always try a direct connection. (v1.6.18-1-gdbc99e5b1)

How should we use a proxy on windows ?

Thanks,
Davy

[kkbruce]

This is like my issue #8846

We use a software Proxy client (proxifier) on Windows, but containerd still takes the ByPass route. There is no way to set a Proxy in Windows like Linux sets http-proxy.conf. This bothers us very much.

[07.25 13:01:56] containerd.exe (3512, System) - registry-1.docker.io(44.205.64.79):443 system connection bypassed