Found in an end-to-end test on a Windows 11 VM against a self-signed server.
- Rollback: a 1.20 agent re-enrolls within a second of an un-enroll, so an
older agent pushed afterwards arrived on an enrolled PC and was refused.
Revoke now takes {"blockreenroll": true, "reason": ...}; a blocked PC is
never issued a credential and keeps working on the shared key until
POST .../assets/<assetid>/allow-reenroll. The Enrollment page offers the
block when un-enrolling and shows blocked PCs with an allow button.
- First upgrade of old agents: agents before 1.20 check the server
certificate when downloading the upgrade, so a store wave failed on PCs that
do not trust a self-signed server while the Migration tab said ready. A
failed download now marks the PC blocked with "server certificate not
trusted by this PC". New Install-ShopDBServerCertificate.ps1 (GE-Enforce,
SYSTEM) adds a non-CA server certificate to the trusted roots after checking
its thumbprint; the server certificate page offers a .cer download and the
SHA-1 thumbprint.
- The generated installer writes ServerPins (with an optional next pin for a
planned rotation), can leave the shared key out so the PC waits for
approval, never touches an existing credential, and skips the trusted-root
import for a CA certificate.
- The agent re-reads server pins about every 60 seconds and recycles pooled
connections within 2 minutes, so a pin change needs no restart.
- An alert can only be acknowledged by a PC it targets.
- A wave no longer counts a PC as failed after a later wave upgraded it.
- The scripts report a pin mismatch only when the pin really is missing, and
otherwise log the real error.
- Runbook: trust step before the first wave, rollback order, pin re-read,
verifying the pin against the live URL; agent contract updated.
- Settings > Endpoints > Enrollment. Migration tab: readiness counts and
progress, each PC's state with the reasons it is blocked, "Upgrade
selected" and "Upgrade next 25", and live wave progress. Credentials tab:
enrolled PCs with revoke, pending requests with approve and reject, and the
shared key and auto-enroll switches. Turning the shared key off asks for
confirmation and shows how many PCs are not enrolled.
- The server certificate page shows the SPKI pin to put in the GE-Enforce
pin entry.
- The agent upgrade script and the asset and printer reporters send the PC's
credential when it has one (over https, only to the issuing server), fall
back to the shared key, check server pins, and log refusals clearly.
- New Set-ShopDBServerPins.ps1 (GE-Enforce entry) and Get-ShopDBServerPin.ps1.
- AGENT-CONTRACT.md documents per-PC credentials; the rollout runbook covers
phases, gates, rollback, pin and wave entries, and every place the shared
key lives and how to clear it at cutover.
- Removed the 09-14 certificate design notes and dated session reports, and
two VM notes that carried a live collector key and advised plain http.
- Corrected the GE-Enforce collector note, which claimed a plain registry
token is protected by ACL.
An operator could see that an endpoint was behind the published build but
had no way to act on it. update_app resolves against Application rows, and
the agent lives in the version store, so there was nothing to push.
Bridge the two: the staged build is packaged and registered as a reserved
Application row, and a managed PowerShell script is seeded to install it.
The endpoint downloads that package over the existing collector-authenticated
app-package route, so no parallel delivery path is introduced.
The new route prepares the delivery and then DELEGATES to
enqueue_endpoint_command as a digest-pinned run_script. It deliberately does
not implement its own enqueue: a second path would duplicate, and eventually
drift from, the endpoint lock, the Configuration Policy gate, stale-command
reaping and the at-most-one-in-flight rule. A fleet-wide agent swap is the
last action that should skip a quarantine check. Tests pin that delegation
rather than only the happy path.
Because it lands as run_script, the caller needs endpoints.runscript on top
of endpoints.agentupdate. That is intended: this delivers arbitrary SYSTEM
PowerShell by the same mechanism as any other script push. The audit event
is written only on an actual 201, so a refused push does not record an
upgrade that never happened.
Replacing the agent is self-modifying the control plane - the process
receiving the command is the one being swapped. The script therefore
re-launches itself detached and exits immediately, because the agent runs
run_script as a direct child and holds its stdout/stderr pipes while
waiting on it. Expect the command to report queued rather than success:
the process that would report completion is stopped mid-run. Judge the
result by the version the endpoint reports afterward.
Tray relaunch does not use the installer's `explorer.exe <path>` trick.
That works in install-shopdbagent.ps1 only because the installer runs as
the user - note its own `-ne "SYSTEM"` guard. This script always runs as
SYSTEM in session 0, where the hand-off reaches no shell and exits 0, so
Start-Process reported success for a relaunch that never happened. It also
cannot descend into the session with a token-duplicating launch:
UserContextSpool documents that WTSQueryUserToken is blocked by endpoint
protection on these hosts. Instead a one-shot scheduled task targets the
pinned ShopFloor account, matching how the user-context spool already
resolves that user, and the tray must run as that account or the
mapped-drive probe reports the wrong (empty) drive table. The relaunch is
verified by polling for the process rather than assumed, and stays
best-effort: the Run key still starts the tray at next logon, and a late
tray is not worth rolling back a good agent upgrade.
panel_status now carries agentbehind/agentversion/agentcurrent so the UI
gates the action on a flag rather than parsing "(behind X)" out of a label.
The button is confirmed by typing UPDATE, naming both versions and the
service interruption, matching how run_script and system_restart are gated.
Verified on live endpoints: upgraded 1.13.0.0 and 1.15.0.0 machines to
1.16.0.0. run_script delivery, digest fetch and system context all predate
1.13.0.0, so no minimum agent version is declared for this path.
