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Add experimental Void guest workflow and vsock agent

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Make iterating on a Firecracker-friendly Void guest practical without replacing the Debian default image path.

Add local Void rootfs build/register/verify plumbing, a language-agnostic dev package baseline, and guest SSH/work-disk hardening so new images use the runtime bundle key, keep a normal root bash environment, and repair stale nested /root layouts on restart.

Replace the guest PING/PONG responder with an HTTP /healthz agent over vsock, rename the runtime bundle and config surface from ping helper to agent while still accepting the legacy keys, and route the post-SSH reminder through the new vm.health path.

Validated with GOCACHE=/tmp/banger-gocache go test ./..., make build, bash -n customize.sh make-rootfs-void.sh, and git diff --check.
This commit is contained in:
Thales Maciel 2026-03-19 14:51:25 -03:00
parent c8d9a122f9
commit 3ed78fdcfc
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GPG key ID: 33112E6833C34679
42 changed files with 2222 additions and 388 deletions
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14
internal/daemon/daemon.go
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@ -331,6 +331,13 @@ func (d *Daemon) dispatch(ctx context.Context, req rpc.Request) rpc.Response {
return rpc.NewError("not_running", fmt.Sprintf("vm %s is not running", vm.Name))
}
return marshalResultOrError(api.VMSSHResult{Name: vm.Name, GuestIP: vm.Runtime.GuestIP}, nil)
case "vm.health":
params, err := rpc.DecodeParams[api.VMRefParams](req)
if err != nil {
return rpc.NewError("bad_request", err.Error())
}
result, err := d.HealthVM(ctx, params.IDOrName)
return marshalResultOrError(result, err)
case "vm.ping":
params, err := rpc.DecodeParams[api.VMRefParams](req)
if err != nil {
@ -355,6 +362,13 @@ func (d *Daemon) dispatch(ctx context.Context, req rpc.Request) rpc.Response {
}
image, err := d.BuildImage(ctx, params)
return marshalResultOrError(api.ImageShowResult{Image: image}, err)
case "image.register":
params, err := rpc.DecodeParams[api.ImageRegisterParams](req)
if err != nil {
return rpc.NewError("bad_request", err.Error())
}
image, err := d.RegisterImage(ctx, params)
return marshalResultOrError(api.ImageShowResult{Image: image}, err)
case "image.delete":
params, err := rpc.DecodeParams[api.ImageRefParams](req)
if err != nil {