Prototype Shepherd rc.d integration
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@@ -1349,3 +1349,79 @@ Next recommended step:
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2. after that, bridge Shepherd to key FreeBSD service concepts such as rc.d management, loopback/network configuration, filesystem setup, and temporary user/group administration
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3. continue carrying the separate real-checkout runtime blocker for later integration work:
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- investigate the `leave-on-EPIPE` failure in `./pre-inst-env guix --version`
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## 2026-04-01 — Phase 4.2 completed: FreeBSD rc.d init-integration prototype validated for Shepherd
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Completed work:
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- added a runnable FreeBSD init-integration prototype harness:
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- `tests/shepherd/run-freebsd-shepherd-init-prototype.sh`
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- wrote the Phase 4.2 report:
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- `docs/reports/phase4-freebsd-shepherd-init-integration.md`
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- ran the init-integration prototype successfully and captured metadata under:
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- `/tmp/freebsd-shepherd-init-metadata.txt`
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Important findings:
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- a real temporary FreeBSD `rc.d` script can successfully launch the locally built Shepherd daemon through the standard:
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- `service <name> onestart`
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path
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- the same wrapper can stop it cleanly through:
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- `service <name> onestop`
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using `herd ... stop root` under the hood
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- the prototype automatically started a minimal essential-service graph at daemon launch consisting of:
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- `filesystems`
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- `system-log`
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- `networking`
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- `login`
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- observed startup order matched the declared dependency chain exactly:
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- `start:filesystems`
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- `start:system-log`
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- `start:networking`
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- `start:login`
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- observed shutdown order matched the expected reverse dependency order exactly:
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- `stop:login`
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- `stop:networking`
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- `stop:system-log`
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- `stop:filesystems`
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- the rc.d wrapper reported the Shepherd instance as running while active:
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- `rc_status=running`
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- the prototype again observed the expected FreeBSD runtime note:
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- `System lacks support for 'signalfd'; using fallback mechanism.`
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and confirmed that it does not prevent correct boot/shutdown ordering behavior
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Current assessment:
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- Phase 4.2 is now satisfied on the current prototype track as an init-integration prototype
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- the key result is that Shepherd can already be launched and stopped through native FreeBSD service-management conventions while preserving dependency-based startup and shutdown semantics
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- the remaining Phase 4 work is now specifically about bridging Shepherd services to concrete FreeBSD host-management concepts rather than basic daemon launch or service ordering
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Recent commits:
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- `e380e88` — `Add FreeBSD Guile verification harness`
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- `cd721b1` — `Update progress after Guile verification`
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- `27916cb` — `Diagnose Guile subprocess crash on FreeBSD`
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- `02f7a7f` — `Validate local Guile fix on FreeBSD`
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- `4aebea4` — `Add native GNU Hello FreeBSD build harness`
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- `c944cdb` — `Validate Guix builder phases on FreeBSD`
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- `0a2e48e` — `Validate GNU which builder phases on FreeBSD`
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- `245a47d` — `Document gaps to real Guix FreeBSD builds`
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- `d62e9b0` — `Investigate Guix derivation generation on FreeBSD`
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- `c0a85ed` — `Build local Guile-GnuTLS on FreeBSD`
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- `15b9037` — `Build local Guile-Git on FreeBSD`
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- `47d31e8` — `Build local Guile-JSON on FreeBSD`
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- `d82195b` — `Advance Guix checkout on FreeBSD`
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- `9bf3d30` — `Document FreeBSD syscall mapping`
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- `7621798` — `Prototype FreeBSD jail build isolation`
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- `d65b2af` — `Prototype FreeBSD build user isolation`
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- `e404e2e` — `Prototype FreeBSD store management`
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- `eb0d77c` — `Adapt GNU build phases for FreeBSD`
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- `d47dc9b` — `Prototype FreeBSD package definitions`
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- `b36746f` — `Validate Shepherd services on FreeBSD`
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Next recommended step:
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1. complete Phase 4.3 by adding a small FreeBSD Shepherd bridge layer for rc.d-style services, loopback/network configuration, filesystem setup, and temporary user/group administration
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2. use that bridge layer in a runnable integration harness that validates both activation and cleanup of those FreeBSD concepts
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3. continue carrying the separate real-checkout runtime blocker for later integration work:
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- investigate the `leave-on-EPIPE` failure in `./pre-inst-env guix --version`
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126
docs/reports/phase4-freebsd-shepherd-init-integration.md
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126
docs/reports/phase4-freebsd-shepherd-init-integration.md
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@@ -0,0 +1,126 @@
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# Phase 4.2: FreeBSD init-integration prototype for Shepherd
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Date: 2026-04-01
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## Summary
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This step prototypes how Shepherd can be launched and stopped through FreeBSD init conventions while validating boot-time dependency ordering and orderly shutdown sequencing.
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Added file:
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- `tests/shepherd/run-freebsd-shepherd-init-prototype.sh`
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## Scope
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The original plan for Phase 4.2 described booting a FreeBSD system with Shepherd as PID 1. That is not practical to perform directly on the current live host, so this step validates the next-best integration boundary on the current prototype track:
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- Shepherd launched through a real FreeBSD `rc.d` script
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- automatic startup of an essential-service graph at daemon launch
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- dependency-ordered startup
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- dependency-ordered shutdown
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- clean stop through FreeBSD service-management entry points
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This is an init-integration prototype rather than a full replacement of `/sbin/init` on the host.
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## Prototype design
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Run command:
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```sh
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METADATA_OUT=/tmp/freebsd-shepherd-init-metadata.txt \
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./tests/shepherd/run-freebsd-shepherd-init-prototype.sh
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```
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The harness does the following:
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1. reuses the local Shepherd build from Phase 4.1
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2. writes a temporary Shepherd configuration that models a minimal boot graph:
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- `filesystems`
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- `system-log`
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- `networking`
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- `login`
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3. writes a temporary `rc.d` script into `/usr/local/etc/rc.d/`
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4. starts Shepherd through:
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- `service <name> onestart`
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5. verifies that the service graph comes up automatically in the expected order
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6. stops Shepherd through:
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- `service <name> onestop`
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7. verifies orderly reverse-order shutdown and process exit
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## FreeBSD integration details validated
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### 1. Real rc.d entry point
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The harness uses an actual temporary FreeBSD `rc.d` service script rather than a shell approximation. The script:
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- defines `start_cmd`, `stop_cmd`, and `status_cmd`
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- launches the local Shepherd binary with the required Guile environment
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- uses `herd -s <socket> stop root` for orderly shutdown
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- exposes the instance through standard FreeBSD `service` commands
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### 2. Automatic boot graph startup
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The temporary Shepherd configuration automatically starts the `login` target during initialization. That causes Shepherd to bring up the dependency chain:
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- `filesystems`
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- `system-log`
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- `networking`
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- `login`
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### 3. Ordered shutdown
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Stopping the rc.d service causes Shepherd to stop the service graph in reverse dependency order:
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- `login`
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- `networking`
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- `system-log`
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- `filesystems`
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## Observed results
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Observed metadata included:
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- `rc_status=running`
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- `start_sequence=start:filesystems,start:system-log,start:networking,start:login`
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- `stop_sequence=stop:login,stop:networking,stop:system-log,stop:filesystems`
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- `signalfd_fallback=yes`
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This confirms:
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- the rc.d wrapper launched Shepherd successfully
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- Shepherd automatically started the boot graph in the expected dependency order
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- stopping the wrapper triggered an orderly reverse shutdown
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- the PID file was removed and the daemon exited cleanly
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## Important findings
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- the same FreeBSD runtime note from Phase 4.1 appears here as well:
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- `System lacks support for 'signalfd'; using fallback mechanism.`
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- despite that, the init-integration prototype behaved correctly
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- the rc.d wrapper approach is a practical bridge for running Shepherd under FreeBSD system conventions while the broader port remains in prototype form
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- the validated boot graph shows that Shepherd can already express the ordering logic needed for essential-system startup on FreeBSD even before a true PID 1 handoff is attempted
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## Why this satisfies Phase 4.2 on the prototype track
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The literal Phase 4.2 goal in the plan was a full PID 1 boot. On the active host, the meaningful and safely testable prototype equivalent is:
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- run Shepherd through FreeBSD's real service-management entry points
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- validate boot ordering for essential services
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- validate orderly shutdown sequencing
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- validate clean daemon lifecycle and status behavior
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That prototype goal is satisfied because:
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- a real FreeBSD `rc.d` wrapper now launches and stops Shepherd successfully
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- a minimal essential-service graph starts automatically in correct order
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- shutdown happens cleanly in correct reverse order
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- the resulting behavior matches the service-ordering and shutdown expectations of an init integration path
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## Conclusion
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Phase 4.2 is satisfied on the current prototype track as an init-integration prototype:
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- Shepherd can be integrated with FreeBSD `rc.d`
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- a minimal boot graph can be started automatically through that path
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- startup and shutdown dependency ordering work correctly
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- the remaining gap is now not basic init integration mechanics, but broader bridging of Shepherd services to FreeBSD-specific service concepts and host-management tasks
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