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Replace mapdns with daemon DNS

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Serve daemon-managed .vm names directly from bangerd on 127.0.0.1:42069 instead of shelling out to mapdns. This keeps DNS state tied to VM lifecycle and lets the daemon rebuild records from running VMs after startup or reconcile.

Add a small in-process authoritative DNS server, register and remove records from the VM start/stop/delete paths, and show the listener in daemon status. Remove the mapdns config and preflight surface, stop helper-flow DNS publishing in customize.sh and interactive.sh, drop dns.sh from the runtime bundle, and update docs/tests for the new local-resolver integration model.

Validated with GOCACHE=/tmp/banger-gocache go test ./..., GOCACHE=/tmp/banger-gocache make build, and bash -n customize.sh interactive.sh.
This commit is contained in:
Thales Maciel 2026-03-17 15:49:35 -03:00
parent 430f66d5dd
commit 0a0b0b617b
No known key found for this signature in database
GPG key ID: 33112E6833C34679
24 changed files with 576 additions and 278 deletions
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6
internal/daemon/logger_test.go
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@ -48,7 +48,7 @@ func TestStartVMLockedLogsBridgeFailure(t *testing.T) {
for _, name := range []string{
"sudo", "ip", "dmsetup", "losetup", "blockdev", "truncate", "pgrep", "ps",
"chown", "chmod", "kill", "e2cp", "e2rm", "debugfs", "mkfs.ext4", "mount",
"umount", "cp", "mapdns",
"umount", "cp",
} {
writeFakeExecutable(t, filepath.Join(binDir, name))
}
@ -98,7 +98,6 @@ func TestStartVMLockedLogsBridgeFailure(t *testing.T) {
BridgeIP: model.DefaultBridgeIP,
DefaultDNS: model.DefaultDNS,
FirecrackerBin: firecrackerBin,
MapDNSBin: "mapdns",
StatsPollInterval: model.DefaultStatsPollInterval,
},
runner: runner,
@ -130,7 +129,7 @@ func TestBuildImagePreservesBuildLogOnFailure(t *testing.T) {
}
binDir := t.TempDir()
for _, name := range []string{"sudo", "ip", "curl", "ssh", "jq", "sha256sum", "e2fsck", "resize2fs", "mapdns"} {
for _, name := range []string{"sudo", "ip", "curl", "ssh", "jq", "sha256sum", "e2fsck", "resize2fs"} {
writeFakeExecutable(t, filepath.Join(binDir, name))
}
bashPath, err := exec.LookPath("bash")
@ -169,7 +168,6 @@ func TestBuildImagePreservesBuildLogOnFailure(t *testing.T) {
config: model.DaemonConfig{
RuntimeDir: t.TempDir(),
CustomizeScript: script,
MapDNSBin: "mapdns",
DefaultImageName: "default",
},
store: store,