Four fixes from the on-host agent bring-up:
1. Bake the real fleet CA into the image. New `fleet_ca` build var (default =
the committed placeholder) file-provisions the trust anchor to
/etc/dot1x/radius-ca.pem — used by wpa_supplicant (RADIUS) AND the fleet-agent
(verify the manager). CI materializes a FLEET_CA secret to a runner-temp file
and passes -var fleet_ca; unset => placeholder (lab). No CA material committed.
2. server-pki.sh installs the agent CLIENT CA as root+intermediate (not root
only). Host TPM certs are leaf-only in NV and signed by the step-ca
intermediate, so a root-only client CA makes the manager advertise only the
root in its CertificateRequest -> Go clients send no cert ("tls: certificate
required") and it couldn't verify a leaf-only cert anyway. bootstrap.sh now
exports intermediate_ca.crt so FLEET_CA_INTERMEDIATE resolves.
3. New `fleet-manager register-host <serial> [-name] [-hostnqn]` subcommand:
seeds/updates an inventory record for a host enrolled out of band (bench
broker, migrated fleet) through the real store, so its agent stream is
accepted. The manual counterpart to the authorise-approve flow.
4. The agent surfaces the authoritative recv-side gRPC status instead of the
bare io.EOF gRPC returns on the send side when the server ends the stream —
so "host is not enrolled" (PermissionDenied) shows up instead of "EOF".
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