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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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18
internal/paths/paths_test.go
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@ -56,21 +56,21 @@ func TestResolveRuntimeDirUsesSourceCheckoutRuntimeSubdir(t *testing.T) {
func createRuntimeBundle(t *testing.T, runtimeDir string) {
t.Helper()
metadata := runtimebundle.BundleMetadata{
FirecrackerBin: "bin/firecracker",
SSHKeyPath: "keys/id_ed25519",
NamegenPath: "bin/namegen",
CustomizeScript: "scripts/customize.sh",
VSockPingHelperPath: "bin/banger-vsock-pingd",
DefaultPackages: "config/packages.apt",
DefaultRootfs: "images/rootfs-docker.ext4",
DefaultKernel: "kernels/vmlinux",
FirecrackerBin: "bin/firecracker",
SSHKeyPath: "keys/id_ed25519",
NamegenPath: "bin/namegen",
CustomizeScript: "scripts/customize.sh",
VSockAgentPath: "bin/banger-vsock-agent",
DefaultPackages: "config/packages.apt",
DefaultRootfs: "images/rootfs-docker.ext4",
DefaultKernel: "kernels/vmlinux",
}
for _, rel := range []string{
metadata.FirecrackerBin,
metadata.SSHKeyPath,
metadata.NamegenPath,
metadata.CustomizeScript,
metadata.VSockPingHelperPath,
metadata.VSockAgentPath,
metadata.DefaultPackages,
metadata.DefaultRootfs,
metadata.DefaultKernel,