Before this change `banger image pull` (both OCI-direct and bundle
paths) shipped images with an empty WorkSeedPath — the BuildWorkSeedImage
helper existed only behind the hidden `banger internal work-seed` CLI.
Every pulled image hit ensureWorkDisk's no-seed branch, and the guest
booted with a bare /root (no .bashrc, no .profile, none of the distro
defaults).
Pull now calls BuildWorkSeedImage after the rootfs is finalised (OCI)
or fetched (bundle). The builder is behind a new `workSeedBuilder` test
seam so existing pull tests don't accidentally demand sudo mount. The
build failure is non-fatal: any error logs a warning and leaves
WorkSeedPath empty — images stay publishable even if the pulled rootfs
has no /root to extract.
Verified end-to-end by wiping the cached smoke image and re-pulling:
work-seed.ext4 lands in the artifact dir next to rootfs.ext4, and all
21 smoke scenarios pass.
Also refreshes the "feature /root work disk" fallback tooling check —
the no-seed path no longer touches mount/umount/cp after commit
0e28504, so the doctor check now only requires truncate + mkfs.ext4.
The warn copy updates from "new VM creates will be slower" to "guest
/root will be empty", which matches the actual tradeoff post-refactor.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Factor the service + capability wiring out of Daemon.Open() into
wireServices(d), an idempotent helper that constructs HostNetwork,
ImageService, WorkspaceService, and VMService from whatever
infrastructure (runner, store, config, layout, logger, closing) is
already set on d. Open() calls it once after filling the composition
root; tests that build &Daemon{...} literals call it to get a working
service graph, preinstalling stubs on the fields they want to fake.
Drops the four lazy-init getters on *Daemon — d.hostNet(),
d.imageSvc(), d.workspaceSvc(), d.vmSvc() — whose sole purpose was
keeping test literals working. Every production call site now reads
d.net / d.img / d.ws / d.vm directly; the services are guaranteed
non-nil once Open returns. No behavior change.
Mechanical: all existing `d.xxxSvc()` calls (production + tests)
rewritten to field access; each `d := &Daemon{...}` in tests gets a
trailing wireServices(d) so the literal + wiring are side-by-side.
Tests that override a pre-built service (e.g. d.img = &ImageService{
bundleFetch: stub}) now set the override before wireServices so the
replacement propagates into VMService's peer pointer.
Also nil-guards HostNetwork.stopVMDNS and d.store in Close() so
partially-initialised daemons (pre-reconcile open failure) still
tear down cleanly — same contract the old lazy getters provided.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Second phase of splitting the daemon god-struct. ImageService now owns
all image + kernel registry operations: register/promote/delete/pull
for images (bundle + OCI paths), the six kernel commands, and the
shared SSH-key/work-seed injection helpers. imageOpsMu (the
publication-window lock) lives on the service; so do the three OCI
pull test seams pullAndFlatten / finalizePulledRootfs / bundleFetch.
The four files images.go, images_pull.go, image_seed.go, kernels.go
flipped their receivers from *Daemon to *ImageService.
FindImage moved with the service. Daemon keeps a thin FindImage
forwarder so callers reading the dispatch code see the obvious
facade and tests that pre-date the split still compile.
flattenNestedWorkHome — called from image_seed.go, vm_authsync.go,
and vm_disk.go across future service boundaries — became a
package-level helper taking a CommandRunner explicitly. Daemon keeps
a deprecated forwarder for now; the other services will use the
package form.
Lazy-init helper imageSvc() on Daemon mirrors hostNet() from
Phase 1, so test literals like &Daemon{store: db, runner: r, ...}
that don't spell out an ImageService still get a working one.
Tests that override the image test seams (autopull_test,
concurrency_test, images_pull_test, images_pull_bundle_test) now
assign d.img = &ImageService{...seams...}; the two-statement pattern
matches what Phase 1 established for HostNetwork.
Dispatch in daemon.go is cleaner now: every image/kernel RPC handler
is a single-liner forwarding to d.imageSvc().*. Phase 5 will do the
same for VM lifecycle.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Before: createVMMu was held across the whole of CreateVM — including
image resolution (which could fire a full auto-pull) and startVMLocked
(boot of multiple seconds). imageOpsMu was held across the whole of
PullImage/RegisterImage/PromoteImage/DeleteImage, so any slow OCI pull,
bundle download, or file copy blocked every other image mutation and
every other VM create that needed to auto-pull. The async create API
bought nothing if all creates serialised on the same mutex.
CreateVM is now three phases:
1. Validate + resolve image (possibly auto-pulling). No global lock.
2. reserveVM: take createVMMu only long enough to re-check the name
is free, allocate the next guest IP, and UpsertVM the "created"
row. Milliseconds.
3. startVMLocked: run the full boot flow under the per-VM lock only.
Parallel creates of different VMs now overlap on image resolution +
boot; they contend only across the reservation claim.
For the image surface a new publishImage helper isolates the commit
atom (recheck name free, atomic rename stagingDir→finalDir, UpsertImage)
under imageOpsMu. pullFromBundle + pullFromOCI do their network fetch
+ ext4 build + ownership fixup + agent injection outside the lock;
Register moves validation + kernel resolution outside; Promote moves
file copy + SSH-key seeding outside; Delete keeps a brief lock over
the lookup + reference check + store delete and does file cleanup
unlocked.
Two concurrency tests assert the new behaviour:
- TestPullImageDoesNotSerialiseOnDifferentNames fails the old code
(second pull blocks on imageOpsMu and never reaches the body).
- TestPullImageRejectsNameClashAtPublish confirms the publish-window
recheck is what enforces name uniqueness now that the body runs
unlocked — exactly one winner.
ARCHITECTURE.md updated to describe the new scope explicitly instead
of calling the locks "narrow".
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
