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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
No known key found for this signature in database
GPG key ID: 33112E6833C34679
42 changed files with 2222 additions and 388 deletions
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18
internal/daemon/logger_test.go
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@ -59,7 +59,7 @@ func TestStartVMLockedLogsBridgeFailure(t *testing.T) {
t.Setenv("PATH", binDir)
firecrackerBin := filepath.Join(t.TempDir(), "firecracker")
vsockHelper := filepath.Join(t.TempDir(), "banger-vsock-pingd")
vsockHelper := filepath.Join(t.TempDir(), "banger-vsock-agent")
if err := os.WriteFile(firecrackerBin, []byte("#!/bin/sh\nexit 0\n"), 0o755); err != nil {
t.Fatalf("write firecracker: %v", err)
}
@ -105,12 +105,12 @@ func TestStartVMLockedLogsBridgeFailure(t *testing.T) {
d := &Daemon{
layout: paths.Layout{RuntimeDir: filepath.Join(t.TempDir(), "runtime")},
config: model.DaemonConfig{
BridgeName: "br-fc",
BridgeIP: model.DefaultBridgeIP,
DefaultDNS: model.DefaultDNS,
FirecrackerBin: firecrackerBin,
VSockPingHelperPath: vsockHelper,
StatsPollInterval: model.DefaultStatsPollInterval,
BridgeName: "br-fc",
BridgeIP: model.DefaultBridgeIP,
DefaultDNS: model.DefaultDNS,
FirecrackerBin: firecrackerBin,
VSockAgentPath: vsockHelper,
StatsPollInterval: model.DefaultStatsPollInterval,
},
runner: runner,
logger: logger,
@ -151,7 +151,7 @@ func TestBuildImagePreservesBuildLogOnFailure(t *testing.T) {
packagesPath := filepath.Join(t.TempDir(), "packages.apt")
sshKeyPath := filepath.Join(t.TempDir(), "id_ed25519")
firecrackerBin := filepath.Join(t.TempDir(), "firecracker")
vsockHelper := filepath.Join(t.TempDir(), "banger-vsock-pingd")
vsockHelper := filepath.Join(t.TempDir(), "banger-vsock-agent")
for _, path := range []string{baseRootfs, kernelPath, packagesPath, sshKeyPath} {
if err := os.WriteFile(path, []byte("artifact"), 0o644); err != nil {
t.Fatalf("write %s: %v", path, err)
@ -186,7 +186,7 @@ func TestBuildImagePreservesBuildLogOnFailure(t *testing.T) {
DefaultPackagesFile: packagesPath,
SSHKeyPath: sshKeyPath,
FirecrackerBin: firecrackerBin,
VSockPingHelperPath: vsockHelper,
VSockAgentPath: vsockHelper,
},
store: store,
runner: runner,