Add ipv6 support and enable go mod

controller/app.go

@@ -2,17 +2,19 @@ package controller
 
 import (
 	"fmt"
-	"github.com/golang/glog"
 	"net"
 	"strings"
+
+	"github.com/golang/glog"
 )
 
 type MonitorType int
 
 const (
-	Monitor_PORT   MonitorType = 1
-	Monitor_EXEC   MonitorType = 2
-	Monitor_CONSUL MonitorType = 3
+	Monitor_PORT         MonitorType = 1
+	Monitor_EXEC         MonitorType = 2
+	Monitor_CONSUL       MonitorType = 3
+	defaultFailThreshold             = 3
 )
 
 var MonitorMap = map[string]MonitorType{"port": Monitor_PORT, "exec": Monitor_EXEC, "consul": Monitor_CONSUL}
@@ -27,10 +29,11 @@ func (m MonitorType) String() string {
 }
 
 type Monitor struct {
-	Type     MonitorType
-	Port     string
-	Protocol string
-	Cmd      string
+	Type      MonitorType
+	Port      string
+	Protocol  string
+	Cmd       string
+	FailCount int
 }
 
 func (m *Monitor) Equal(other *Monitor) bool {
@@ -48,9 +51,19 @@ func (m Monitors) Contains(elem *Monitor) bool {
 	return false
 }
 
+type Vip struct {
+	IP     net.IP
+	Net    *net.IPNet
+	Family string
+}
+
+func (v *Vip) Equal(other *Vip) bool {
+	return v.IP.Equal(other.IP)
+}
+
 type App struct {
 	Name     string
-	Vip      *net.IPNet
+	Vip      *Vip
 	Monitors Monitors
 	Nats     []string
 }
@@ -64,7 +77,7 @@ func (a *App) Equal(other *App) bool {
 			return false
 		}
 	}
-	return a.Name == other.Name && a.Vip.String() == other.Vip.String()
+	return a.Name == other.Name && a.Vip.Equal(other.Vip)
 }
 
 func NewApp(appName, vip string, monitors []string, nats []string) (*App, error) {
@@ -72,11 +85,16 @@ func NewApp(appName, vip string, monitors []string, nats []string) (*App, error)
 		return nil, fmt.Errorf("Invalid app name")
 	}
 	app := &App{Name: appName, Nats: nats}
-	_, ipnet, err := net.ParseCIDR(vip)
+	ip, ipnet, err := net.ParseCIDR(vip)
 	if err != nil {
 		return nil, fmt.Errorf("Invalid VIP specified, need ip/mask")
 	}
-	app.Vip = ipnet
+	app.Vip = &Vip{IP: ip, Net: ipnet}
+	if ip.To4() != nil {
+		app.Vip.Family = "4"
+	} else {
+		app.Vip.Family = "6"
+	}
 	for _, m := range monitors {
 		// valid monitor formats:
 		// "port:tcp:123" , "exec:/local/check.sh", "consul"