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grafana
grpc: Support HTTPS_PROXY
Feature Description
The grpc-go project supports the HTTPS_PROXY variable for setting and enabling a proxy. Unfortunately, running a k6 test doesn't work as expected. It doesn't use the set proxy.
It is an expected behavior based on the current implementation. The grpc-go doesn't support the proxy if a custom dialer is set.
https://github.com/grpc/grpc-go/blob/11feb0a9afd844fd2ab1f18dca02ad6a344b21bf/internal/transport/http2_client.go#L155-L178
This affects the new experimental module and the stable k6/net/grpc based on the logic we have in the netext/grpc package:
https://github.com/grafana/k6/blob/a2fe0a8e824423262e7029c3853dc0fa5ce9f9b6/lib/netext/grpcext/conn.go#L59-L61
Expected behavior
HTTPS_PROXY=mygrpcentrypoint:9000 k6 run script.js
Note: HTTP_PROXY is not expected to work because it is not supported by the grpc-go library.
Suggested Solution (optional)
No response
Already existing or connected issues / PRs (optional)
The original forum discussion https://community.k6.io/t/grpc-proxy-not-working/7347
