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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
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GPG key ID: 33112E6833C34679
24 changed files with 576 additions and 278 deletions
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6
internal/daemon/images.go
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@ -109,12 +109,6 @@ func (d *Daemon) BuildImage(ctx context.Context, params api.ImageBuildParams) (i
"BANGER_RUNTIME_DIR="+d.config.RuntimeDir,
"BANGER_STATE_DIR="+filepath.Join(d.layout.StateDir, "image-build"),
)
if d.config.MapDNSBin != "" {
cmd.Env = append(cmd.Env, "BANGER_MAPDNS_BIN="+d.config.MapDNSBin)
}
if d.config.MapDNSDataFile != "" {
cmd.Env = append(cmd.Env, "BANGER_MAPDNS_DATA_FILE="+d.config.MapDNSDataFile)
}
if err := cmd.Run(); err != nil {
_ = os.RemoveAll(artifactDir)
return model.Image{}, err