Thales Maciel
3ed78fdcfc
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.
93 lines
2.5 KiB
Go
93 lines
2.5 KiB
Go
package paths
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import (
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"encoding/json"
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"os"
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"path/filepath"
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"testing"
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"banger/internal/runtimebundle"
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)
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func TestResolveRuntimeDirPrefersEnv(t *testing.T) {
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t.Setenv("BANGER_RUNTIME_DIR", "/env/runtime")
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if got := ResolveRuntimeDir("/config/runtime", "/deprecated/repo"); got != "/env/runtime" {
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t.Fatalf("ResolveRuntimeDir() = %q, want /env/runtime", got)
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}
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}
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func TestResolveRuntimeDirUsesInstalledLayout(t *testing.T) {
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root := t.TempDir()
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runtimeDir := filepath.Join(root, "lib", "banger")
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createRuntimeBundle(t, runtimeDir)
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origExecutablePath := executablePath
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executablePath = func() (string, error) {
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return filepath.Join(root, "bin", "banger"), nil
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}
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t.Cleanup(func() {
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executablePath = origExecutablePath
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})
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if got := ResolveRuntimeDir("", ""); got != runtimeDir {
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t.Fatalf("ResolveRuntimeDir() = %q, want %q", got, runtimeDir)
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}
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}
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func TestResolveRuntimeDirUsesSourceCheckoutRuntimeSubdir(t *testing.T) {
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root := t.TempDir()
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runtimeDir := filepath.Join(root, "runtime")
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createRuntimeBundle(t, runtimeDir)
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origExecutablePath := executablePath
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executablePath = func() (string, error) {
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return filepath.Join(root, "banger"), nil
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}
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t.Cleanup(func() {
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executablePath = origExecutablePath
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})
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if got := ResolveRuntimeDir("", ""); got != runtimeDir {
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t.Fatalf("ResolveRuntimeDir() = %q, want %q", got, runtimeDir)
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}
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}
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func createRuntimeBundle(t *testing.T, runtimeDir string) {
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t.Helper()
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metadata := runtimebundle.BundleMetadata{
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FirecrackerBin: "bin/firecracker",
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SSHKeyPath: "keys/id_ed25519",
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NamegenPath: "bin/namegen",
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CustomizeScript: "scripts/customize.sh",
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VSockAgentPath: "bin/banger-vsock-agent",
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DefaultPackages: "config/packages.apt",
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DefaultRootfs: "images/rootfs-docker.ext4",
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DefaultKernel: "kernels/vmlinux",
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}
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for _, rel := range []string{
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metadata.FirecrackerBin,
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metadata.SSHKeyPath,
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metadata.NamegenPath,
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metadata.CustomizeScript,
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metadata.VSockAgentPath,
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metadata.DefaultPackages,
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metadata.DefaultRootfs,
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metadata.DefaultKernel,
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} {
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path := filepath.Join(runtimeDir, rel)
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if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
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t.Fatalf("mkdir %s: %v", filepath.Dir(path), err)
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}
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if err := os.WriteFile(path, []byte("test"), 0o644); err != nil {
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t.Fatalf("write %s: %v", path, err)
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}
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}
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data, err := json.Marshal(metadata)
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if err != nil {
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t.Fatalf("Marshal: %v", err)
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}
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if err := os.WriteFile(filepath.Join(runtimeDir, runtimebundle.BundleMetadataFile), data, 0o644); err != nil {
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t.Fatalf("write bundle metadata: %v", err)
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}
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}
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