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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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Makefile
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@ -13,7 +13,7 @@ RUNTIME_SOURCE_DIR ?= runtime
RUNTIME_ARCHIVE ?= dist/banger-runtime.tar.gz
BINARIES := banger bangerd
GO_SOURCES := $(shell find cmd internal -type f -name '*.go' | sort)
RUNTIME_EXECUTABLES := firecracker customize.sh dns.sh packages.sh namegen
RUNTIME_EXECUTABLES := firecracker customize.sh packages.sh namegen
RUNTIME_DATA_FILES := packages.apt id_ed25519 rootfs-docker.ext4
RUNTIME_OPTIONAL_DATA_FILES := rootfs.ext4 bundle.json
RUNTIME_BOOT_FILES := wtf/root/boot/vmlinux-6.8.0-94-generic wtf/root/boot/initrd.img-6.8.0-94-generic