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certctl/docs/reference/configuration.md
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shankar0123 30034085e6 docs: v2.1.0 release polish — strip internal bundle/phase tags, update status for OIDC ship 
README:
- Rewrite Status block: drop the stale 'federated identity not yet
  shipped' line; flag v2.1.0 OIDC + sessions + back-channel logout
  + break-glass as early-access; encourage GitHub issues for IdP
  rough edges. (A1 framing — keep early-access umbrella, no
  SAML/WebAuthn/JIT roadmap teaser.)
- Add OIDC SSO bullet to 'What it does' covering per-IdP runbooks,
  group-claim → role mapping, AES-256-GCM client_secret encryption,
  JWKS auto-refresh, PKCE-S256, RFC 9700 §4.7.1 pre-login binding,
  RFC 9207 iss check, __Host- cookies, CSRF rotation, idle+absolute
  expiry, BCL, break-glass admin.
- Update Security paragraph: three auth paths (API keys / OIDC /
  break-glass), HMAC-signed sessions, CSRF rotation, RFC OIDC BCL.
- Correct CI coverage thresholds against
  .github/coverage-thresholds.yml (service 70%, handler 75%,
  crypto 88%, auth packages 85-95%); 'static analysis' replaces
  the inflated '11 linters' claim (actual count is 4 active).

Docs B3 sweep — strip operator-facing 'Bundle N' / 'Phase N' tags:
- docs/operator/auth-threat-model.md — rewrite intro; rename 5 H2
  sections (API-key + RBAC defenses / OIDC + sessions + break-glass
  defenses / OIDC + sessions threat catalogue / Closed federated-
  identity threats / Future-work threats); clean ~12 H3/prose hits.
- docs/operator/rbac.md — strip Bundle 1 framing from intro,
  scope_id deferral note, MCP tools section, day-0 bootstrap, and
  'Where to look next'.
- docs/operator/auth-benchmarks.md — drop 'Phase 14' framing from
  title intro, hardware floor caption, result table caption,
  methodology, and pre-merge audit section.
- docs/operator/security.md — already cleaned earlier this session
  (RBAC / day-0 / approval-bypass / OIDC federation / sessions /
  OIDC first-admin / break-glass H3s).
- docs/operator/oidc-runbooks/{index,keycloak,authentik,okta,
  azure-ad}.md — strip Auth Bundle 2 framing + Phase 10/3/4
  references; replace with feature-name prose.
- docs/operator/legacy-clients-tls-1.2.md — drop Bundle F / M-023
  audit-reference framing; keep CWE-326.
- docs/operator/database-tls.md — drop Bundle B / M-018 framing
  from intro + Helm section.
- docs/operator/runbooks/disaster-recovery.md — drop 'Production
  hardening II Phase 10' status callout.
- docs/migration/oidc-enable.md — retitle 'Enable OIDC SSO';
  strip Bundle 1/2 framing from prereqs, troubleshooting, related
  docs; update __Host- cookie callout from 'audit MED-14' to
  v2.1.0-BREAKING.
- docs/migration/api-keys-to-rbac.md — strip Bundle 1 framing from
  intro, migration table, IsAdmin section, and cross-references.
- docs/migration/acme-from-cert-manager.md — strip residual
  'Phase 5' tags from cert-manager integration test references.
- docs/reference/configuration.md — retitle Auth section.
- docs/reference/profiles.md — strip Bundle 1 Phase 9 framing
  from RequiresApproval section + Related list.
- docs/reference/auth-standards-implemented.md — rewrite intro
  (API-key + RBAC + OIDC + sessions + back-channel logout +
  break-glass); rename 'Bundle 1 (RBAC) standards covered
  separately' H2; clean per-row Phase references.
- docs/README.md — rewrite nav-table entries to drop Bundle 1/2
  parentheticals; retitle 'Enable OIDC SSO' migration entry.

No code or test changes; pure operator-facing prose polish for
the v2.1.0 tag.
2026-05-11 16:54:07 +00:00

8.1 KiB
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Configuration Reference

Last reviewed: 2026-05-05

Compact reference for CERTCTL_* environment variables consumed by certctl-server and certctl-agent. Most operators don't need to touch these — defaults are tuned for the common case. Reach for them when the system's behaviour needs tuning beyond what's exposed in the GUI / API.

This page enumerates the operator-tunable knobs that don't have a dedicated home elsewhere. Connector-specific env vars are documented on the per-connector pages under docs/reference/connectors/. Protocol env vars (ACME server, EST, SCEP) are documented under docs/reference/protocols/. TLS env vars are documented in docs/operator/tls.md.

Scheduler intervals

The scheduler runs N background loops; intervals are tunable for performance / contention tuning.

Variable Default Description
CERTCTL_SCHEDULER_AGENT_HEALTH_CHECK_INTERVAL 2m How often the agent-health loop scans for stale heartbeats and transitions agents to Unhealthy / Offline.
CERTCTL_SCHEDULER_JOB_PROCESSOR_INTERVAL 30s How often the job-processor loop dispatches Pending jobs to agents.
CERTCTL_SCHEDULER_NOTIFICATION_PROCESS_INTERVAL 1m How often the notification-dispatcher loop fans out queued alerts to channels.
CERTCTL_SHORT_LIVED_EXPIRY_CHECK_INTERVAL 5m How often the short-lived-expiry loop watches certs whose TTL is less than 1h for imminent expiry.

For the full scheduler topology (14 loops, 9 always-on + 5 opt-in) see architecture.md "Scheduler topology".

Job lifecycle

Variable Default Description
CERTCTL_JOB_AWAITING_CSR_TIMEOUT 24h How long a job stays in AwaitingCSR before the scheduler marks it Failed (the agent never picked it up).

Rate limiting

The control plane API is rate-limited by default; tune for high-volume environments (mass-rotation events, bulk imports).

Variable Default Description
CERTCTL_RATE_LIMIT_ENABLED true Master toggle. Disable only for trusted-network single-tenant deploys where the API is firewall-protected.
CERTCTL_RATE_LIMIT_PER_USER_RPS 0 (= use global default) Per-user requests-per-second cap. Zero opts each user into the global default in internal/api/middleware.
CERTCTL_RATE_LIMIT_PER_USER_BURST 0 (= use global default) Per-user token-bucket burst size. Same opt-in semantics.

Audit trail

Variable Default Description
CERTCTL_AUDIT_FLUSH_TIMEOUT_SECONDS 30 How long the audit-event flush worker waits for the buffered batch to drain before forcing a flush at shutdown.

Deploy verification

The deploy-hardening primitive wraps every cert deploy in atomic-write + post-verify + rollback. These env vars tune the post-deploy TLS verification phase.

Variable Default Description
CERTCTL_VERIFY_DEPLOYMENT true Master toggle for post-deploy TLS verify. Disable only for connectors / environments where the verify endpoint is not reachable from the agent.
CERTCTL_VERIFY_DELAY 2s How long to wait after the reload command completes before the first verify-handshake attempt (gives the daemon time to pick up new keys).
CERTCTL_VERIFY_TIMEOUT 10s Per-attempt TLS-handshake timeout.
CERTCTL_DEPLOY_BACKUP_RETENTION 3 How many .certctl-bak.<unix-nanos>.<ext> rollback snapshots to keep per target after a successful deploy. 0 uses the default of 3; -1 opts out of pruning entirely.

For the full deploy contract see deployment-model.md.

Database

Variable Default Description
CERTCTL_DATABASE_MIGRATIONS_PATH ./migrations Filesystem path to the *.up.sql / *.down.sql migration set. Override only when running certctl-server from a non-standard layout.

Agent

Variable Default Description
CERTCTL_AGENT_ID (none — required) The agent's unique ID, issued by POST /api/v1/agents/register and bundled into the agent's registration response. Pass via this env var when the agent runs as a systemd unit / container without the -agent-id CLI flag.

Auth (RBAC + OIDC + sessions + break-glass)

Configuration knobs for the RBAC + OIDC + sessions + break-glass auth surface. Full operator guidance lives in operator/rbac.md, operator/oidc-runbooks/, and operator/auth-threat-model.md.

Variable Default Description
CERTCTL_SESSION_BIND_USER_AGENT false Bind every session cookie to the User-Agent header captured at login; mismatch -> 401. Defense in depth against stolen cookies on the same network.
CERTCTL_SESSION_GC_INTERVAL 1h How often the scheduler's session-GC loop sweeps expired/revoked rows out of sessions. Trade-off: shorter = smaller table, more DB churn; longer = pile-up.
CERTCTL_OIDC_BCL_MAX_AGE_SECONDS 60 Back-channel logout iat freshness window. Tokens older or newer than this skew (in either direction) are rejected.
CERTCTL_OIDC_PRELOGIN_REQUIRE_UA false Reject the OIDC callback if the User-Agent at callback differs from the UA captured at pre-login. RFC 9700 §4.7.1 defense-in-depth.
CERTCTL_OIDC_PRELOGIN_REQUIRE_IP false Same as _UA but for client IP. Set carefully — corporate networks with carrier-grade NAT can change apparent IP mid-flow.
CERTCTL_DEMO_MODE_ACK false Operator acknowledgement that demo mode is intentional in this deploy. Required when CERTCTL_AUTH_TYPE=none to allow server startup; safety net against demo-mode-in-production leakage.
CERTCTL_TRUSTED_PROXIES (empty) Comma-separated list of trusted-proxy CIDRs (e.g. 10.0.0.0/8,192.0.2.1). XFF is consulted for client-IP derivation only when the immediate peer sits in this allowlist.
CERTCTL_TRUSTED_PROXIES_COUNT (synthesised) Read-only counter exposed by /api/v1/auth/runtime-config; mirrors len(CERTCTL_TRUSTED_PROXIES). Not operator-settable; documented here so the G-3 env-docs-drift guard catches drift.
CERTCTL_BOOTSTRAP_TOKEN (empty) One-shot token used to mint the first admin role binding via POST /api/v1/auth/bootstrap. Once consumed, deletes itself from memory and unsets the bootstrap endpoint.
CERTCTL_BOOTSTRAP_TOKEN_SET (synthesised) Boolean exposed by /api/v1/auth/runtime-config; true when CERTCTL_BOOTSTRAP_TOKEN was set at server start. Not operator-settable; documented here so the G-3 guard catches drift.
CERTCTL_BOOTSTRAP_OIDC_PROVIDER_ID (empty) When OIDC is enabled, restricts the first-admin OIDC strategy to the named provider only — any other provider's tokens won't trigger the bootstrap hook.
CERTCTL_BOOTSTRAP_ADMIN_GROUPS_COUNT (synthesised) Read-only counter exposed by /api/v1/auth/runtime-config; mirrors len(CERTCTL_BOOTSTRAP_ADMIN_GROUPS). Documented here so the G-3 guard catches drift.
CERTCTL_BREAKGLASS_LOCKOUT_THRESHOLD 5 Number of consecutive failed /auth/breakglass/login attempts that lock the credential.

SCEP profile binding (single-profile back-compat)

Variable Default Description
CERTCTL_SCEP_PROFILE_ID (empty) Optional certificate profile ID for the legacy single-profile SCEP path. The multi-profile path uses CERTCTL_SCEP_PROFILES=<list> + CERTCTL_SCEP_PROFILE_<NAME>_PROFILE_ID instead — see scep-server.md.

Related references

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