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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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5
internal/cli/banger.go
View file

@ -20,6 +20,7 @@ import (
"banger/internal/paths"
"banger/internal/rpc"
"banger/internal/system"
"banger/internal/vmdns"
"github.com/spf13/cobra"
)
@ -112,10 +113,10 @@ func newDaemonCommand() *cobra.Command {
}
ping, pingErr := rpc.Call[api.PingResult](cmd.Context(), layout.SocketPath, "ping", api.Empty{})
if pingErr != nil {
_, err = fmt.Fprintf(cmd.OutOrStdout(), "stopped\nsocket: %s\nlog: %s\n", layout.SocketPath, layout.DaemonLog)
_, err = fmt.Fprintf(cmd.OutOrStdout(), "stopped\nsocket: %s\nlog: %s\ndns: %s\n", layout.SocketPath, layout.DaemonLog, vmdns.DefaultListenAddr)
return err
}
_, err = fmt.Fprintf(cmd.OutOrStdout(), "running\npid: %d\nsocket: %s\nlog: %s\n", ping.PID, layout.SocketPath, layout.DaemonLog)
_, err = fmt.Fprintf(cmd.OutOrStdout(), "running\npid: %d\nsocket: %s\nlog: %s\ndns: %s\n", ping.PID, layout.SocketPath, layout.DaemonLog, vmdns.DefaultListenAddr)
return err
},
},

3
internal/cli/cli_test.go
View file

@ -263,6 +263,9 @@ func TestDaemonStatusIncludesLogPathWhenStopped(t *testing.T) {
if !strings.Contains(output, "log: "+filepath.Join(stateHome, "banger", "bangerd.log")) {
t.Fatalf("output = %q, want daemon log path", output)
}
if !strings.Contains(output, "dns: 127.0.0.1:42069") {
t.Fatalf("output = %q, want dns listener", output)
}
}
func TestBuildDaemonCommandIsDetachedFromCallerContext(t *testing.T) {