tests: add k6 stress and resilience suite - #3722
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Drive real load at the WSGI (sync, gthread, gevent) and native ASGI workers with k6, direct and behind nginx, over HTTP/1.1, TLS HTTP/2, WebSocket, and uwsgi_pass, and assert correctness under load: zero failed requests, intact bodies and checksums, the negotiated protocol, echoed request ids, and no worker tracebacks. k6 and toxiproxy run as pinned container images. The smoke matrix (six representative configs) is wired and verified and gates CI; every worker/topology/protocol/profile is selectable by environment. Resilience (worker kill, HUP, TTIN/TTOU, graceful) and toxiproxy fault scenarios are gated behind GUNICORN_STRESS_HEAVY and run nightly. No gunicorn code changes; the uwsgi_pass topology uses the supported sync worker.
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Adds a docker suite at
tests/docker/stress/that drives real load at the WSGI (sync, gthread, gevent) and native ASGI workers with k6, direct and behind nginx, over HTTP/1.1, TLS HTTP/2, WebSocket, anduwsgi_pass, and asserts correctness under load: zero failed requests, intact bodies and checksums, the negotiated protocol, echoed request ids, and no worker tracebacks. k6 and toxiproxy run as pinned container images; no Grafana Cloud, nothing installed on the host.One env-driven gunicorn image serves every worker/topology, so every worker/topology/protocol/profile is selectable by environment. The six-config smoke matrix is wired and gates CI (new
stress-smokejob); resilience (worker kill, HUP, TTIN/TTOU, graceful) and toxiproxy fault scenarios are gated behindGUNICORN_STRESS_HEAVYand run nightly (stress-nightly.yml).No gunicorn code changes. The
uwsgi_passtopology uses the sync worker: the asgi worker's uWSGI parser fails behind nginxuwsgi_pass(502,Invalid uWSGI header: incomplete header), tracked separately.Run with
PYTEST=".venv/bin/python -m pytest" scripts/run_docker_tests.sh stress.