zones: Env: allow multiple gateways on a Zone

Signed-off-by: Alejandro Mery <amery@jpi.io>

pkg/zones/env.go

@@ -57,10 +57,8 @@ func (m *Env) writeEnvZone(w io.Writer, z *Zone) {
 	m.writeEnvVar(w, z.Name, "ZONE%v_%s", zoneID, "NAME")
 
 	// ZONE{zoneID}_GW
-	gatewayID := getRingZeroGatewayID(z)
-	if gatewayID > 0 {
-		m.writeEnvVar(w, fmt.Sprintf("%v", gatewayID), "ZONE%v_%s", zoneID, "GW")
-	}
+	gateways, _ := z.GatewayIDs()
+	m.writeEnvVarInts(w, gateways, "ZONE%v_%s", zoneID, "GW")
 }
 
 func (m *Env) writeEnvVarInts(w io.Writer, value []int, name string, args ...any) {
@@ -108,17 +106,3 @@ func genEnvZoneNodes(z *Zone) string {
 	}
 	return ""
 }
-
-func getRingZeroGatewayID(z *Zone) int {
-	var gatewayID int
-
-	z.ForEachMachine(func(p *Machine) bool {
-		if p.IsGateway() {
-			gatewayID = p.ID
-		}
-
-		return gatewayID != 0
-	})
-
-	return gatewayID
-}