feat(dhcp): DHCPv4-Server via Kea (kea-dhcp4-server) — v1.2.92

Verwalteter DHCPv4-Server analog Unbound/Squid/Chrony.
- Migration 0041: dhcp_settings (singleton, node-lokal), dhcp_subnets, dhcp_reservations.
- internal/kea: Renderer baut Kea-JSON via Go-Struct→Marshal (garantiert valide), managed /etc/edgeguard/kea/kea-dhcp4.conf (Symlink von /etc/kea), Service-Lifecycle an enabled gekoppelt (default AUS, kein rogue DHCP). Interface per NAME (cluster-sicher, kein node-lokaler FK).
- internal/services/dhcp + internal/handlers/dhcp.go: Settings + Subnet/Reservation-CRUD, Validierung (CIDR/IP/MAC/interface exists).
- configgen: Stop/Enable/DisableService. Firewall: AutoFWRule.Iface → udp/67 pro LAN-Interface gescopt (kein WAN). Cluster: subnets/reservations repliziert (hashSpec), dhcp_settings node-lokal (localOnlyTables).
- main.go + render.go + WithAllReloaders Wiring. Packaging: kea-dhcp4-server Dependency, /etc/edgeguard/kea Dir, Symlink, disable-on-install, sudoers (restart/stop/enable/disable).
- UI: DHCP-Seite (Settings + Subnets + Reservierungen pro Subnet), Route/Nav/i18n de/en, HA-Warnung 'nur auf einer Node aktivieren'.
- Tests (guarded EG_FWTEST_DSN): Kea-Renderer gegen DB (valides JSON + Felder), FW-Auto-Rule-Iface inkl. nft -c. Scope v1: DHCPv4.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

cmd/edgeguard-api/main.go

@@ -28,6 +28,7 @@ import (
 	squidrender "git.netcell-it.de/projekte/edgeguard-native/internal/squid"
 	unboundrender "git.netcell-it.de/projekte/edgeguard-native/internal/unbound"
 	wgrender "git.netcell-it.de/projekte/edgeguard-native/internal/wireguard"
+	kearender "git.netcell-it.de/projekte/edgeguard-native/internal/kea"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/handlers/response"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/acme"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/alerts"
@@ -58,6 +59,7 @@ import (
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/setup"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/tlscerts"
 	wgsvc "git.netcell-it.de/projekte/edgeguard-native/internal/services/wireguard"
+	dhcpsvc "git.netcell-it.de/projekte/edgeguard-native/internal/services/dhcp"
 	oidcsvc "git.netcell-it.de/projekte/edgeguard-native/internal/services/oidc"
 	usersvc "git.netcell-it.de/projekte/edgeguard-native/internal/services/users"
 	wafsvc "git.netcell-it.de/projekte/edgeguard-native/internal/services/waf"
@@ -445,6 +447,12 @@ func main() {
 		}
 		handlers.NewNTPHandler(ntpRepo, auditRepo, nodeID, withFW(chronyReloader)).Register(authed)
 
+		// DHCP (Kea) — re-render kea-dhcp4.conf + manage service lifecycle.
+		keaReloader := func(ctx context.Context) error {
+			return kearender.New(pool).Render(ctx)
+		}
+		handlers.NewDHCPHandler(dhcpsvc.New(pool), auditRepo, nodeID, withFW(keaReloader)).Register(authed)
+
 		// Wire all service reloaders into systemHdl so RenderConfigs
 		// re-renders every service from DB state in one shot.
 		systemHdl.WithAllReloaders(map[string]func(context.Context) error{
@@ -453,6 +461,7 @@ func main() {
 			"squid":     squidReloader,
 			"unbound":   unboundReloader,
 			"chrony":    chronyReloader,
+			"kea":       keaReloader,
 		})
 
 		// License — node-local key store + DB-mirror of last verify

cmd/edgeguard-ctl/cluster_replication.go

@@ -79,6 +79,7 @@ var localOnlyTables = []string{
 	"cluster_settings",   // VIP-Interface kann pro Node unterschiedlich sein
 	"dns_settings",       // listen_addresses ist node-spezifisch
 	"ntp_settings",       // listen_addresses ist node-spezifisch
+	"dhcp_settings",      // ob DIESE Node DHCP betreibt (Dual-DHCP vermeiden)
 	"system_settings",    // Hostname, Maintenance-Mode etc.
 	"join_tokens_used",   // Token-Tracking nur auf Primary relevant
 	"audit_log",          // Lokales Audit-Protokoll

cmd/edgeguard-ctl/render.go

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"git.netcell-it.de/projekte/edgeguard-native/internal/chrony"
+	"git.netcell-it.de/projekte/edgeguard-native/internal/kea"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/configgen"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/database"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/firewall"
@@ -61,9 +62,11 @@ func cmdRenderConfig(args []string) int {
 	wg := wireguard.New(pool, secrets.New(""))
 	ub := unbound.New(pool)
 	cn := chrony.New(pool)
+	ke := kea.New(pool)
 	if skipReload {
 		hap.SkipReload = true
 		fw.SkipReload = true
+		ke.SkipReload = true
 	}
 
 	// keepalived: Node-ID aus node.conf für Prioritäts-Berechnung
@@ -72,7 +75,7 @@ func cmdRenderConfig(args []string) int {
 		ka = keepalived.New(pool, lc.NodeID)
 	}
 
-	gens := []configgen.Generator{hap, fw, sq, wg, ub, cn}
+	gens := []configgen.Generator{hap, fw, sq, wg, ub, cn, ke}
 	if ka != nil {
 		gens = append(gens, ka)
 	}