Files
Patrick Buckley a3ff07a86d fix(tls): mTLS-aware container healthcheck + boot-time init retry
A whole-stack restart races every node against the console for the CA
fetch (compose re-enforces depends_on ordering only on `up`): losers
logged one warning and served plain HTTP for their lifetime, while
winners served mTLS that the plain-HTTP container healthcheck could
never probe — leaving "healthy" plaintext nodes and "unhealthy"
working ones.

- TLSClient.init() grows attempts/base_delay retry (server passes 6
  attempts, ~31 s backoff) absorbing the boot race; per-attempt CA-fetch
  failures log warning + debug traceback instead of error tracebacks.
- healthcheck.py falls back to HTTPS when the plain probe fails,
  presenting the node's own cert as the client cert with the cluster CA
  pinned; dials localhost because the internal CA issues DNS SANs only.
  Default plain-HTTP deployments are unchanged.
- The server writes boot PEMs under a fixed root (TURNSTONE_TLS_PEM_DIR,
  default <tmpdir>/turnstone-tls) so the probe can find them; boot
  clears stale dirs and refuses a symlinked/foreign-owned root; renewal
  rewrites the PEM dir so the probe's client cert never outlives the
  served cert.
- /health reports tls: "active"|"fallback" (absent when TLS is
  disabled) so a silently downgraded node is observable.
2026-06-09 18:37:46 -07:00
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