The caddy.ok check in /health/ready probed /config/ (51KB) and timed out
at 3s with "This operation was aborted" while Caddy admin was actually
healthy. Two underlying issues:
1. Native undici fetch() rejects connections to :2019 (Caddy admin). Use
fetchT() which falls back to raw http.request for the admin port.
2. /config/ is heavy and head-of-line blocks when /load is in flight.
Switch to /config/apps/http/servers/srv0/listen (9 bytes) and bump
timeout to 10s.
Verified on DNS2 2026-07-09: direct Caddy admin curl 200 in 3ms,
/health/ready was aborting at 3s. After fix: /health/ready caddy.ok
true in <100ms.
Caddyfile change (/etc/caddy/Caddyfile) added /dashcaddy-login to the
@needsAuth not path exclude so direct hits to the auto-login landing
page render the page instead of getting gate-redirected to a blank
302 — applied and reloaded via POST /load earlier this session.
Fresh users copy-pasting healthcheck blocks from k8s/Docker docs need
the standard short aliases. Without /healthz and /readyz they get
connection refused. This commit:
1. Adds /healthz + /readyz as root-level aliases for /health/live +
/health/ready in src/app.js. Handler bodies DRYed into named
functions (livenessHandler, readinessHandler) so a probe semantics
change updates all five paths at once.
2. Removes the dead /api/v1/health*, /api/v1/health/live, /api/v1/health/ready
registrations from PUBLIC_ROUTES and CSRF exclusion list — those
routes were never actually mounted on the apiRouter (only root
paths existed). Anyone probing /api/v1/health now gets a clean 404
instead of being routed through to a duplicate root handler.
3. Adds bypass for the 5 probe paths in three places where it matters:
- PUBLIC_ROUTES (no auth)
- csrf-protection.js excludedPaths (no CSRF check)
- middleware.js request-logging exclusion (k8s polling every 10s
doesn't flood the audit log)
- middleware.js Tailscale auth bypass (probes don't carry Tailscale
identity headers)
4. Adds __tests__/health-probe-aliases.test.js (19 tests):
- Alias equivalence (/healthz == /health/live, /readyz == /health/ready)
- Back-compat (/health == /health/live)
- Path consolidation (all 3 /api/v1/health* return 404)
- Source-of-truth PUBLIC_ROUTES allowlist sync check
- Source-of-truth src/app.js mount list sync check (catches drift
between handler mount and middleware allowlist)
5. Documents probes in README (copy-paste docker-compose.yml +
Kubernetes blocks) and user-guide (Health Probes section + System
API table updated).
Post-fix: 941/941 tests pass (+19 new). Zero new ESLint warnings
introduced. The pre-existing warnings/errors in src/app.js line 906
('os' is not defined) and the empty blocks in logging.test.js are
not regressions from this commit.
Krystie