Root cause of the blank chrony fields (found on comet-beacon-54): chrony 4.x
(RHEL 9) defaults its command interface to the UNIX socket only
(/run/chrony/chronyd.sock), usable by root or the chrony group with a writable
/run/chrony. The fleet-agent unit is hardened — DynamicUser (group tss, not
chrony) + ProtectSystem=strict (/run read-only) — so it cannot open the unix
socket nor create chronyc's reply socket. Bench proof: normal-user 'chronyc
tracking' -> 506 Cannot talk to daemon; only sudo worked; 'chronyc -h 127.0.0.1'
failed and ss showed no UDP :323. So the probe always failed and every chrony_*
field stayed empty. SELinux permissive did NOT help — it was never (only) an
SELinux problem; the nnp_transition module (prev commit) is still needed for the
enforcing exec transition.
Fix: bind chronyd's command socket on 127.0.0.1 (bindcmdaddress in chrony.conf,
idempotent in the 2c provisioner) and point the probe at it (chronyc -n -h
127.0.0.1 tracking). UDP needs no fs write or group and rides the unit's
already-allowed AF_INET. Loopback + monitoring-only (state changes still need the
root unix socket), so exposure is minimal. Rejected the unix-socket route (chrony
group + ReadWritePaths=/run/chrony) because /run/chrony is 0750 (group has no
write). Documented in docs/stig-deviations.md #17; .te bench note updated for the
enforcing UDP path. Needs a workstation image rebuild + reboot.
The agent only reported chrony as synced|unsynced — nothing about how well the
clock tracks. Parse `chronyc tracking` for the source-relative metrics.
- proto: HealthSnapshot.chrony_offset_seconds (16, signed system-time offset,
fast=+), chrony_source (17, reference name/IP), chrony_stratum (18); regenerated.
- agent: replace chronyState() with chronyTracking()/parseChrony() — one exec,
parses Leap status + Reference ID + Stratum + System time offset (+ test).
- manager: Health.{ChronyOffset,ChronySource,ChronyStratum}; snapshotToHealth maps
them; influx writes chrony_offset_seconds/_stratum/_source and whitelists the
offset + stratum as graphable fields.
- UI: chronySummary() + offsetMs() — the chrony row now shows
"synced · 192.168.50.10 · s3 · +0.01ms" instead of just "synced".
The manager lets an admin schedule a reboot (desired.reboot_at) but never showed
whether it had happened. Add host uptime to the health snapshot and derive a
reboot status from it.
- proto: HealthSnapshot.uptime_seconds (15); regenerated pb.go (manager + agent copy).
- agent: probe /proc/uptime -> uptime_seconds (with parser + test).
- manager: Health.UptimeSeconds cached in inventory; snapshotToHealth maps it;
influx writes + whitelists uptime_seconds as a queryable field.
- UI: fmt.js dur() + rebootStatus() — boot_time = last_seen - uptime (manager clock
frame, no host/manager sync needed), compared to reboot_at. Monitor host detail
shows an "uptime" row and a "reboot" row: pending in X / overdue by X / rebooted.
Observability-only — works before the reboot ACTUATOR lands (deferred). Once a host
boots after the scheduled time (BMC/manual now, agent later), the badge flips to
"rebooted" automatically.
Build the on-host agent that pairs with fleet-hostapi and feeds the
fleet-manager control plane (TODO #14 "STILL TO BUILD (a)"). Nothing on the
workstation talked to the manager before this; Monitor + InfluxDB stayed empty.
Scope: telemetry only. The agent reuses the host TPM identity for mTLS (read-only
tpmkey.LoadSigner at 0x81000100 + cert from NV 0x01800100; the private key never
leaves the TPM), opens the long-lived FleetAgent.Session bidi stream, sends Hello
+ periodic HealthSnapshot (load/cpu/temp/mem/tmpfs/nvme/auth/selinux/chrony/kiosk,
probed read-only from /proc+/sys plus hostapi facts), and LOGS but does not act on
the DesiredState/Command it receives. Reconcile actuators (kiosk URL, reboot,
drain) are deferred until the telemetry half is bench-verified.
- files/agent/: new module (go-tpm + grpc), static CGO_ENABLED=0 like enrol/hostapi.
Copies the enrol tpmkey (+ read-only LoadSigner) and the generated fleet.agent.v1
proto so it stays self-contained without importing the initramfs enrol module.
- files/agent/simtest/: proves the TPM-signed cert completes a real mTLS client-auth
handshake (RequireAndVerifyClientCert) against the go-tpm software simulator.
- files/etc/fleet-agent/agent.env: fleet-generic config (manager DNS name, fleet CA
reused from radius-ca.pem, TPM handle/nvindex, interval). No per-host state.
- fleet-agent.service: hardened unit (tss group for /dev/tpmrm0, INET egress).
- CI builds fleet-agent out-of-VM + runs vet/test + the simulator handshake test.
- Packer: enable_agent flag (default on) + 2b-agent provisioner + fapolicyd trust.
Post-switch-root only, so no dracut/initramfs changes.
- docs: TODO #14 + fleet-management-design as-built updated.
Requires the host already enrolled (broker approve births the inventory row) —
else the manager returns PermissionDenied, the correct "not enrolled yet" signal.
Audiobuzz