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.
101 lines
3.2 KiB
Go
101 lines
3.2 KiB
Go
package daemon
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import (
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"context"
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"fmt"
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"strings"
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"banger/internal/config"
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"banger/internal/model"
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"banger/internal/paths"
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"banger/internal/system"
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)
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func Doctor(ctx context.Context) (system.Report, error) {
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layout, err := paths.Resolve()
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if err != nil {
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return system.Report{}, err
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}
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cfg, err := config.Load(layout)
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if err != nil {
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return system.Report{}, err
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}
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d := &Daemon{
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layout: layout,
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config: cfg,
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runner: system.NewRunner(),
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}
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return d.doctorReport(ctx), nil
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}
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func (d *Daemon) doctorReport(ctx context.Context) system.Report {
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report := system.Report{}
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report.AddPreflight("runtime bundle", d.runtimeBundleChecks(), runtimeBundleStatus(d.config))
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report.AddPreflight("core vm lifecycle", d.coreVMLifecycleChecks(), "required host tools available")
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report.AddPreflight("vsock guest agent", d.vsockChecks(), "vsock agent prerequisites available")
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d.addCapabilityDoctorChecks(ctx, &report)
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report.AddPreflight("image build", d.imageBuildChecks(ctx), "image build prerequisites available")
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return report
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}
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func (d *Daemon) runtimeBundleChecks() *system.Preflight {
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checks := system.NewPreflight()
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hint := paths.RuntimeBundleHint()
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checks.RequireExecutable(d.config.FirecrackerBin, "firecracker binary", hint)
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checks.RequireFile(d.config.SSHKeyPath, "runtime ssh private key", `refresh the runtime bundle`)
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checks.RequireExecutable(d.config.VSockAgentPath, "vsock agent", `run 'make build' or refresh the runtime bundle`)
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checks.RequireFile(d.config.DefaultRootfs, "default rootfs image", `set "default_rootfs" or refresh the runtime bundle`)
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checks.RequireFile(d.config.DefaultKernel, "kernel image", `set "default_kernel" or refresh the runtime bundle`)
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if strings.TrimSpace(d.config.DefaultInitrd) != "" {
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checks.RequireFile(d.config.DefaultInitrd, "initrd image", `set "default_initrd" or refresh the runtime bundle`)
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}
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if strings.TrimSpace(d.config.DefaultPackagesFile) != "" {
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checks.RequireFile(d.config.DefaultPackagesFile, "package manifest", `set "default_packages_file" or refresh the runtime bundle`)
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}
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return checks
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}
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func (d *Daemon) coreVMLifecycleChecks() *system.Preflight {
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checks := system.NewPreflight()
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d.addBaseStartCommandPrereqs(checks)
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return checks
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}
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func (d *Daemon) imageBuildChecks(ctx context.Context) *system.Preflight {
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checks := system.NewPreflight()
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d.addImageBuildPrereqs(
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ctx,
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checks,
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firstNonEmpty(d.config.DefaultBaseRootfs, d.config.DefaultRootfs),
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d.config.DefaultKernel,
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d.config.DefaultInitrd,
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d.config.DefaultModulesDir,
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"",
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)
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return checks
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}
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func (d *Daemon) vsockChecks() *system.Preflight {
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checks := system.NewPreflight()
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checks.RequireExecutable(d.config.VSockAgentPath, "vsock agent", `run 'make build' or refresh the runtime bundle`)
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checks.RequireFile(vsockHostDevicePath, "vsock host device", "load the vhost_vsock kernel module on the host")
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return checks
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}
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func runtimeBundleStatus(cfg model.DaemonConfig) string {
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if strings.TrimSpace(cfg.RuntimeDir) == "" {
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return "runtime dir not configured"
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}
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return fmt.Sprintf("runtime dir %s", cfg.RuntimeDir)
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}
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func firstNonEmpty(values ...string) string {
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for _, value := range values {
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if strings.TrimSpace(value) != "" {
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return value
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}
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}
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return ""
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}
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