railiance-infra/workplans/RAIL-HO-WP-0013-host-time-baseline.md

id	type	title	domain	repo	status	owner	topic_slug	created	updated	related_workplans
RAIL-HO-WP-0013	workplan	Declare and verify the Railiance host UTC baseline	financials	railiance-infra	ready	codex	railiance	2026-09-14	2026-09-14	RCLK-WP-0005 RCLK-WP-0002 RAIL-HO-WP-0011

Owner work record for RCLK-WP-0005-T01/T02. Canonical S1 ownership is already settled by railiance-master ADR-0004 and docs/reef-first-wave-source-map.md. Do not create a competing time baseline in railiance-hosts or bootstrap.

Read-only railiance01 observation on 2026-09-14: Ubuntu 24.04.4 LTS/KVM, systemd-timesyncd active/enabled, UTC, synchronized flag yes, distro fallback ntp.ubuntu.com, no local drop-in, no UDP/123 listener in the observed namespace. The inspected sample reported offset -634us, root distance 3.432ms and normal leap state. This is operational metadata, not an independent UTC error proof. Receipt and repeatable collector: railiance-clock/docs/evidence/2026-09-14-railiance01-clock-inventory.json and tools/observe_host_clock.py. No configuration or clock change was made.

Adopt the existing daemon and review a versioned UTC policy

id: RAIL-HO-WP-0013-T01
status: todo
priority: high

Retain systemd-timesyncd as the baseline candidate; do not install chrony/ntpd as a second daemon. Join RCLK-WP-0002's upstream independence, leap convention, health/error/holdover and consumer-bound review. Specify inventory opt-in, exact server/fallback list, boot/poll policy, health export and rollback. The current single-provider distro fallback is evidence, not a reviewed independent source set. Define what source health can honestly claim before exposing it to the clock app.

Implement one declarative host role and verification entry point

id: RAIL-HO-WP-0013-T02
status: wait
priority: high

Depends on T01 policy review. Add opt-in Ansible role under ansible/roles/ and a narrow playbook that manages only the reviewed time-service drop-in and service state. Integrate bootstrap.yaml through the same role, not copied tasks. Guard against other active time daemons and unsupported host platforms. Add health verification to the owner baseline/Goss handoff with explicit unusable states. No CAP_SYS_TIME or clock write operation for the application time service; that capability belongs only to the admitted host daemon. No public UDP/123 ingress.

Prove IaC convergence, drift and recovery before live rollout

id: RAIL-HO-WP-0013-T03
status: wait
priority: high

Depends on T02. Lint/render and disposable VM convergence; second apply must be no-op. Detect intentional disposable drift, verify reboot persistence and source outage/recovery, and prove source-based rollback. Measure health reporting limits. Record exact source revision/target/config checksum and no unrelated changes. A mocked systemctl result or container-only check is not host synchronization proof.

Apply the reviewed source and return steady-state handoff

id: RAIL-HO-WP-0013-T04
status: wait
priority: high

Depends on T03 and normal reviewed live-host authorization. Produce the exact railiance01 diff and clock-step/credential-consumer impact plan, then use owner IaC to apply/read back. Reverify usable host health and no extra listener/daemon; record rollback and monitoring ownership. Hand evidence to RCLK-WP-0005 and railiance-bootstrap for ordering/rehearsal. Keep all residuals live before closure. No corporate workstation time settings or app-clock trust adoption in this plan.