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DistrLab v1.1.0 — circuit breaker & smarter load balancing

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@dsk-dev-ai dsk-dev-ai released this 07 Oct 14:40
v1.1.0
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Learn about vigilant mode.

Resilience depth

Everything from v1.0's seven scenarios, plus deeper failure handling.

Circuit breaker

  • New Circuit breaker scenario (#8): users → breaker → flaky catalog → postgres.
  • Breaker trips OPEN past an error-rate threshold, fast-fails with 503, goes half-open after a cooldown, and closes once its probes succeed.
  • Link down toggle + flakiness + trips-at / cooldown / probe-limit knobs.
  • Inspector Trip / Reset buttons; OPEN / HALF-OPEN badges on the topology.
  • Measured: link down → p95 collapses from ~4020 ms to ~20 ms; repair → "Healthy" returns automatically.

Smarter load balancing

  • Power of two choices (P2C) and least-latency (response-time EMA) join round-robin, random, least-inflight and sticky.

Fixes & quality

  • Health flags now recover after an outage (intermediate nodes are no longer stuck "unhealthy" forever).
  • New headless engine test suite: bun test → 20 passing.
  • New ROADMAP.md (v1.0 → v2.0); README updated for eight scenarios.

Live at https://distrlab.onrender.com

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