Adds golangci-lint to check for code errors + clean up resulting findings after running.

Signed-off-by: Steve Sloka <slokas@vmware.com>

.golangci.yml

@@ -0,0 +1,13 @@
+run:
+  timeout: 10m
+  
+linters:
+  enable:
+  - bodyclose
+  - gofmt
+  - goimports
+  - revive
+  - gosec
+  - misspell
+  - unconvert
+  - unparam

Makefile

@@ -87,7 +87,7 @@ check:
 	go mod tidy
 	test -z "$(git status --porcelain)"
 	test -z $(shell gofmt -l main.go | tee /dev/stderr) || echo "[WARN] Fix formatting issues with 'make fmt'"
-	golint ./...
+	golangci-lint run
 	go vet ./...
 	
 run: install

cmd/kube-vip-config.go

@@ -24,13 +24,13 @@ func init() {
 	kubeVipSampleConfig.Flags().BoolVar(&cliConfig.StartAsLeader, "startAsLeader", false, "Start this instance as the cluster leader")
 	kubeVipSampleConfig.Flags().BoolVar(&cliConfig.EnableARP, "arp", true, "Use ARP broadcasts to improve VIP re-allocations")
 	kubeVipSampleConfig.Flags().StringVar(&cliLocalPeer, "localPeer", "server1:192.168.0.1:10000", "Settings for this peer, format: id:address:port")
-	kubeVipSampleConfig.Flags().StringSliceVar(&cliRemotePeers, "remotePeers", []string{"server2:192.168.0.2:10000", "server3:192.168.0.3:10000"}, "Comma seperated remotePeers, format: id:address:port")
+	kubeVipSampleConfig.Flags().StringSliceVar(&cliRemotePeers, "remotePeers", []string{"server2:192.168.0.2:10000", "server3:192.168.0.3:10000"}, "Comma separated remotePeers, format: id:address:port")
 	// Load Balancer flags
 	kubeVipSampleConfig.Flags().BoolVar(&cliConfigLB.BindToVip, "lbBindToVip", false, "Bind example load balancer to VIP")
 	kubeVipSampleConfig.Flags().StringVar(&cliConfigLB.Type, "lbType", "tcp", "Type of load balancer instance (TCP/HTTP)")
 	kubeVipSampleConfig.Flags().StringVar(&cliConfigLB.Name, "lbName", "Example Load Balancer", "The name of a load balancer instance")
 	kubeVipSampleConfig.Flags().IntVar(&cliConfigLB.Port, "lbPort", 8080, "Port that load balancer will expose on")
-	kubeVipSampleConfig.Flags().StringSliceVar(&cliBackends, "lbBackends", []string{"192.168.0.1:8080", "192.168.0.2:8080"}, "Comma seperated backends, format: address:port")
+	kubeVipSampleConfig.Flags().StringSliceVar(&cliBackends, "lbBackends", []string{"192.168.0.1:8080", "192.168.0.2:8080"}, "Comma separated backends, format: address:port")
 }
 
 var kubeVipSampleConfig = &cobra.Command{
@@ -72,13 +72,13 @@ var kubeVipSampleConfig = &cobra.Command{
 
 		err := cliConfig.ParseFlags(cliLocalPeer, cliRemotePeers, cliBackends)
 		if err != nil {
-			cmd.Help()
+			_ = cmd.Help()
 			log.Fatalln(err)
 		}
 
 		err = kubevip.ParseEnvironment(&cliConfig)
 		if err != nil {
-			cmd.Help()
+			_ = cmd.Help()
 			log.Fatalln(err)
 		}
 

cmd/kube-vip-kubeadm.go

@@ -29,7 +29,7 @@ var kubeKubeadm = &cobra.Command{
 	Use:   "kubeadm",
 	Short: "Kubeadm functions",
 	Run: func(cmd *cobra.Command, args []string) {
-		cmd.Help()
+		_ = cmd.Help()
 		// TODO - A load of text detailing what's actually happening
 	},
 }
@@ -43,15 +43,19 @@ var kubeKubeadmInit = &cobra.Command{
 		log.SetLevel(log.Level(logLevel))
 		initConfig.LoadBalancers = append(initConfig.LoadBalancers, initLoadBalancer)
 		// TODO - A load of text detailing what's actually happening
-		kubevip.ParseEnvironment(&initConfig)
+		err := kubevip.ParseEnvironment(&initConfig)
+		if err != nil {
+			log.Fatalf("Error parsing environment from config: %v", err)
+		}
+
 		// TODO - check for certain things VIP/interfaces
 		if initConfig.Interface == "" {
-			cmd.Help()
+			_ = cmd.Help()
 			log.Fatalln("No interface is specified for kube-vip to bind to")
 		}
 
 		if initConfig.VIP == "" && initConfig.Address == "" {
-			cmd.Help()
+			_ = cmd.Help()
 			log.Fatalln("No address is specified for kube-vip to expose services on")
 		}
 		cfg := kubevip.GeneratePodManifestFromConfig(&initConfig, Release.Version, inCluster)
@@ -69,15 +73,19 @@ var kubeKubeadmJoin = &cobra.Command{
 
 		initConfig.LoadBalancers = append(initConfig.LoadBalancers, initLoadBalancer)
 		// TODO - A load of text detailing what's actually happening
-		kubevip.ParseEnvironment(&initConfig)
+		err := kubevip.ParseEnvironment(&initConfig)
+		if err != nil {
+			log.Fatalf("Error parsing environment from config: %v", err)
+		}
+
 		// TODO - check for certain things VIP/interfaces
 		if initConfig.Interface == "" {
-			cmd.Help()
+			_ = cmd.Help()
 			log.Fatalln("No interface is specified for kube-vip to bind to")
 		}
 
 		if initConfig.VIP == "" && initConfig.Address == "" {
-			cmd.Help()
+			_ = cmd.Help()
 			log.Fatalln("No address is specified for kube-vip to expose services on")
 		}
 

cmd/kube-vip-manifests.go

@@ -28,7 +28,7 @@ var kubeManifest = &cobra.Command{
 	Use:   "manifest",
 	Short: "Manifest functions",
 	Run: func(cmd *cobra.Command, args []string) {
-		cmd.Help()
+		_ = cmd.Help()
 		// TODO - A load of text detailing what's actually happening
 	},
 }
@@ -41,11 +41,13 @@ var kubeManifestPod = &cobra.Command{
 		log.SetLevel(log.Level(logLevel))
 		initConfig.LoadBalancers = append(initConfig.LoadBalancers, initLoadBalancer)
 		// TODO - A load of text detailing what's actually happening
-		kubevip.ParseEnvironment(&initConfig)
+		if err := kubevip.ParseEnvironment(&initConfig); err != nil {
+			log.Fatalf("Error parsing environment from config: %v", err)
+		}
 
 		// The control plane has a requirement for a VIP being specified
 		if initConfig.EnableControlPane && (initConfig.VIP == "" && initConfig.Address == "" && !initConfig.DDNS) {
-			cmd.Help()
+			_ = cmd.Help()
 			log.Fatalln("No address is specified for kube-vip to expose services on")
 		}
 		cfg := kubevip.GeneratePodManifestFromConfig(&initConfig, Release.Version, inCluster)
@@ -62,12 +64,15 @@ var kubeManifestDaemon = &cobra.Command{
 		log.SetLevel(log.Level(logLevel))
 		initConfig.LoadBalancers = append(initConfig.LoadBalancers, initLoadBalancer)
 		// TODO - A load of text detailing what's actually happening
-		kubevip.ParseEnvironment(&initConfig)
+		if err := kubevip.ParseEnvironment(&initConfig); err != nil {
+			log.Fatalf("error parsing environment config: %v", err)
+		}
+
 		// TODO - check for certain things VIP/interfaces
 
 		// The control plane has a requirement for a VIP being specified
 		if initConfig.EnableControlPane && (initConfig.VIP == "" && initConfig.Address == "" && !initConfig.DDNS) {
-			cmd.Help()
+			_ = cmd.Help()
 			log.Fatalln("No address is specified for kube-vip to expose services on")
 		}
 		cfg := kubevip.GenerateDeamonsetManifestFromConfig(&initConfig, Release.Version, inCluster, taint)

cmd/kube-vip-start.go

@@ -33,14 +33,14 @@ func init() {
 	kubeVipStart.Flags().BoolVar(&startConfig.StartAsLeader, "startAsLeader", false, "Start this instance as the cluster leader")
 	kubeVipStart.Flags().BoolVar(&startConfig.EnableARP, "arp", false, "Use ARP broadcasts to improve VIP re-allocations")
 	kubeVipStart.Flags().StringVar(&startLocalPeer, "localPeer", "server1:192.168.0.1:10000", "Settings for this peer, format: id:address:port")
-	kubeVipStart.Flags().StringSliceVar(&startRemotePeers, "remotePeers", []string{"server2:192.168.0.2:10000", "server3:192.168.0.3:10000"}, "Comma seperated remotePeers, format: id:address:port")
+	kubeVipStart.Flags().StringSliceVar(&startRemotePeers, "remotePeers", []string{"server2:192.168.0.2:10000", "server3:192.168.0.3:10000"}, "Comma separated remotePeers, format: id:address:port")
 	// Load Balancer flags
 	kubeVipStart.Flags().BoolVar(&startConfigLB.BindToVip, "lbBindToVip", false, "Bind example load balancer to VIP")
 	kubeVipStart.Flags().StringVar(&startConfigLB.Type, "lbType", "tcp", "Type of load balancer instance (TCP/HTTP)")
 	kubeVipStart.Flags().StringVar(&startConfigLB.Name, "lbName", "Example Load Balancer", "The name of a load balancer instance")
 	kubeVipStart.Flags().IntVar(&startConfigLB.Port, "lbPort", 8080, "Port that load balancer will expose on")
 	kubeVipStart.Flags().IntVar(&startConfigLB.BackendPort, "lbBackEndPort", 6443, "A port that all backends may be using (optional)")
-	kubeVipStart.Flags().StringSliceVar(&startBackends, "lbBackends", []string{"192.168.0.1:8080", "192.168.0.2:8080"}, "Comma seperated backends, format: address:port")
+	kubeVipStart.Flags().StringSliceVar(&startBackends, "lbBackends", []string{"192.168.0.1:8080", "192.168.0.2:8080"}, "Comma separated backends, format: address:port")
 
 	// Cluster configuration
 	kubeVipStart.Flags().StringVar(&startKubeConfigPath, "kubeConfig", "/etc/kubernetes/admin.conf", "The path of a kubernetes configuration file")
@@ -83,7 +83,9 @@ var kubeVipStart = &cobra.Command{
 		if startConfig.SingleNode {
 			// If the Virtual IP isn't disabled then create the netlink configuration
 			// Start a single node cluster
-			newCluster.StartSingleNode(&startConfig, disableVIP)
+			if err := newCluster.StartSingleNode(&startConfig, disableVIP); err != nil {
+				log.Errorf("error starting single node: %v", err)
+			}
 		} else {
 			if disableVIP {
 				log.Fatalln("Cluster mode requires the Virtual IP to be enabled, use single node with no VIP")

cmd/kube-vip.go

@@ -21,16 +21,16 @@ import (
 var configPath string
 
 // Path to the configuration file
-var namespace string
+// var namespace string
 
 // Disable the Virtual IP (bind to the existing network stack)
 var disableVIP bool
 
 // Disable the Virtual IP (bind to the existing network stack)
-var controlPlane bool
+// var controlPlane bool
 
 // Run as a load balancer service (within a pod / kubernetes)
-var serviceArp bool
+// var serviceArp bool
 
 // ConfigMap name within a Kubernetes cluster
 var configMap string
@@ -114,7 +114,7 @@ func init() {
 	kubeVipCmd.PersistentFlags().Uint32Var(&initConfig.BGPPeerConfig.AS, "peerAS", 65000, "The AS number for a BGP peer")
 	kubeVipCmd.PersistentFlags().StringVar(&initConfig.BGPPeerConfig.Password, "peerPass", "", "The md5 password for a BGP peer")
 	kubeVipCmd.PersistentFlags().BoolVar(&initConfig.BGPPeerConfig.MultiHop, "multihop", false, "This will enable BGP multihop support")
-	kubeVipCmd.PersistentFlags().StringSliceVar(&initConfig.BGPPeers, "bgppeers", []string{}, "Comma seperated BGP Peer, format: address:as:password:multihop")
+	kubeVipCmd.PersistentFlags().StringSliceVar(&initConfig.BGPPeers, "bgppeers", []string{}, "Comma separated BGP Peer, format: address:as:password:multihop")
 
 	// Control plane specific flags
 	kubeVipCmd.PersistentFlags().StringVarP(&initConfig.Namespace, "namespace", "n", "kube-system", "The configuration map defined within the cluster")
@@ -129,7 +129,7 @@ func init() {
 	kubeVipCmd.PersistentFlags().BoolVar(&initConfig.EnableServices, "services", false, "Enable Kubernetes services, hybrid mode")
 
 	// Prometheus HTTP Server
-	kubeVipCmd.PersistentFlags().StringVar(&initConfig.PrometheusHTTPServer, "promethuesHTTPServer", ":2112", "Host and port used to expose Promethues metrics via an HTTP server")
+	kubeVipCmd.PersistentFlags().StringVar(&initConfig.PrometheusHTTPServer, "promethuesHTTPServer", ":2112", "Host and port used to expose Prometheus metrics via an HTTP server")
 
 	kubeVipCmd.AddCommand(kubeKubeadm)
 	kubeVipCmd.AddCommand(kubeManifest)
@@ -167,7 +167,7 @@ var kubeVipSample = &cobra.Command{
 	Use:   "sample",
 	Short: "Generate a Sample configuration",
 	Run: func(cmd *cobra.Command, args []string) {
-		cmd.Help()
+		_ = cmd.Help()
 	},
 }
 
@@ -215,7 +215,7 @@ var kubeVipManager = &cobra.Command{
 			log.Infof("No interface is specified for VIP in config, auto-detecting default Interface")
 			defaultIF, err := vip.GetDefaultGatewayInterface()
 			if err != nil {
-				cmd.Help()
+				_ = cmd.Help()
 				log.Fatalf("unable to detect default interface -> [%v]", err)
 			}
 			initConfig.Interface = defaultIF.Name
@@ -266,6 +266,7 @@ var kubeVipManager = &cobra.Command{
 	},
 }
 
+// PrometheusHTTPServerConfig defines the Prometheus server configuration.
 type PrometheusHTTPServerConfig struct {
 	// Addr sets the http server address used to expose the metric endpoint
 	Addr string

pkg/bgp/peers.go

@@ -7,12 +7,12 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/golang/protobuf/ptypes"
+	"github.com/golang/protobuf/ptypes" //nolint
 	"github.com/golang/protobuf/ptypes/any"
 	api "github.com/osrg/gobgp/api"
 )
 
-//AddPeer will add peers to the BGP configuration
+//  AddPeer will add peers to the BGP configuration
 func (b *Server) AddPeer(peer Peer) (err error) {
 	port := 179
 
@@ -20,7 +20,7 @@ func (b *Server) AddPeer(peer Peer) (err error) {
 		peer.Address = t[0]
 
 		if port, err = strconv.Atoi(t[1]); err != nil {
-			return fmt.Errorf("Unable to parse port '%s' as int: %s", t[1], err)
+			return fmt.Errorf("unable to parse port '%s' as int: %s", t[1], err)
 		}
 	}
 
@@ -73,11 +73,13 @@ func (b *Server) getPath(ip net.IP) *api.Path {
 		pfxLen = 128
 	}
 
+	//nolint
 	nlri, _ := ptypes.MarshalAny(&api.IPAddressPrefix{
 		Prefix:    ip.String(),
 		PrefixLen: pfxLen,
 	})
 
+	//nolint
 	a1, _ := ptypes.MarshalAny(&api.OriginAttribute{
 		Origin: 0,
 	})
@@ -91,6 +93,7 @@ func (b *Server) getPath(ip net.IP) *api.Path {
 		nh = b.c.RouterID
 	}
 
+	//nolint
 	a2, _ := ptypes.MarshalAny(&api.NextHopAttribute{
 		NextHop: nh,
 	})

pkg/cluster/clusterLeader.go

@@ -126,6 +126,7 @@ func (cluster *Cluster) StartLeaderCluster(c *kubevip.Config, sm *Manager, bgpSe
 	signal.Notify(signalChan, syscall.SIGTERM)
 
 	// Add Notification for SIGKILL (sent from Kubernetes)
+	//nolint
 	signal.Notify(signalChan, syscall.SIGKILL)
 
 	go func() {
@@ -137,7 +138,10 @@ func (cluster *Cluster) StartLeaderCluster(c *kubevip.Config, sm *Manager, bgpSe
 	}()
 
 	// (attempt to) Remove the virtual IP, incase it already exists
-	cluster.Network.DeleteIP()
+	err = cluster.Network.DeleteIP()
+	if err != nil {
+		log.Errorf("could not delete virtualIP: %v", err)
+	}
 
 	// Managers for Vip load balancers and none-vip loadbalancers
 	nonVipLB := loadbalancer.LBManager{}
@@ -150,7 +154,7 @@ func (cluster *Cluster) StartLeaderCluster(c *kubevip.Config, sm *Manager, bgpSe
 		}
 	}()
 
-	// If Packet is enabled then we can begin our preperation work
+	// If Packet is enabled then we can begin our preparation work
 	var packetClient *packngo.Client
 	if c.EnableMetal {
 		if c.ProviderConfig != "" {
@@ -194,7 +198,7 @@ func (cluster *Cluster) StartLeaderCluster(c *kubevip.Config, sm *Manager, bgpSe
 		if len(c.LoadBalancers) != 0 {
 			for x := range c.LoadBalancers {
 				// If the load balancer doesn't bind to the VIP
-				if c.LoadBalancers[x].BindToVip == false {
+				if !c.LoadBalancers[x].BindToVip {
 					err = nonVipLB.Add("", &c.LoadBalancers[x])
 					if err != nil {
 						log.Warnf("Error creating loadbalancer [%s] type [%s] -> error [%s]", c.LoadBalancers[x].Name, c.LoadBalancers[x].Type, err)
@@ -267,7 +271,7 @@ func (cluster *Cluster) StartLeaderCluster(c *kubevip.Config, sm *Manager, bgpSe
 					// Once we have the VIP running, start the load balancer(s) that bind to the VIP
 					for x := range c.LoadBalancers {
 
-						if c.LoadBalancers[x].BindToVip == true {
+						if c.LoadBalancers[x].BindToVip {
 							err = VipLB.Add(cluster.Network.IP(), &c.LoadBalancers[x])
 							if err != nil {
 								log.Warnf("Error creating loadbalancer [%s] type [%s] -> error [%s]", c.LoadBalancers[x].Name, c.LoadBalancers[x].Type, err)
@@ -287,7 +291,7 @@ func (cluster *Cluster) StartLeaderCluster(c *kubevip.Config, sm *Manager, bgpSe
 					}
 				}
 
-				if c.EnableARP == true {
+				if c.EnableARP {
 					ctxArp, cancelArp = context.WithCancel(context.Background())
 
 					ipString := cluster.Network.IP()
@@ -375,10 +379,6 @@ func (cluster *Cluster) StartLeaderCluster(c *kubevip.Config, sm *Manager, bgpSe
 			OnNewLeader: func(identity string) {
 				// we're notified when new leader elected
 				log.Infof("Node [%s] is assuming leadership of the cluster", identity)
-
-				if identity == id {
-					// We have the lock
-				}
 			},
 		},
 	})

pkg/cluster/clusterRaft.go

@@ -51,7 +51,7 @@ func (cluster *Cluster) StartRaftCluster(c *kubevip.Config) error {
 
 	// If we want to start a node as leader then we will not add any remote peers, this will leave this as a cluster of one
 	// The remotePeers will add themselves to the cluster as they're added
-	if c.StartAsLeader != true {
+	if !c.StartAsLeader {
 		for x := range c.RemotePeers {
 			// Make sure that we don't add in this server twice
 			if c.LocalPeer.Address != c.RemotePeers[x].Address {
@@ -87,7 +87,10 @@ func (cluster *Cluster) StartRaftCluster(c *kubevip.Config) error {
 	isLeader := c.StartAsLeader
 
 	// (attempt to) Remove the virtual IP, incase it already exists
-	cluster.Network.DeleteIP()
+	err = cluster.Network.DeleteIP()
+	if err != nil {
+		log.Errorf("error deleting virtual IP: %v", err)
+	}
 
 	// leader log broadcast - this counter is used to stop flooding STDOUT with leader log entries
 	var leaderbroadcast int
@@ -98,7 +101,7 @@ func (cluster *Cluster) StartRaftCluster(c *kubevip.Config) error {
 	// Iterate through all Configurations
 	for x := range c.LoadBalancers {
 		// If the load balancer doesn't bind to the VIP
-		if c.LoadBalancers[x].BindToVip == false {
+		if !c.LoadBalancers[x].BindToVip {
 			err = nonVipLB.Add("", &c.LoadBalancers[x])
 			if err != nil {
 				log.Warnf("Error creating loadbalancer [%s] type [%s] -> error [%s]", c.LoadBalancers[x].Name, c.LoadBalancers[x].Type, err)
@@ -112,15 +115,6 @@ func (cluster *Cluster) StartRaftCluster(c *kubevip.Config) error {
 
 	go func() {
 		for {
-			if c.AddPeersAsBackends == true {
-				// Get addresses and change backends
-
-				// c.LoadBalancers[0].Backends
-				// for x := range raftServer.GetConfiguration().Configuration().Servers {
-				// 	raftServer.GetConfiguration().Configuration().Servers[x].Address
-				// }
-
-			}
 			// Broadcast the current leader on this node if it's the correct time (every leaderLogcount * time.Second)
 			if leaderbroadcast == leaderLogcount {
 				log.Infof("The Node [%s] is leading", raftServer.Leader())
@@ -130,7 +124,7 @@ func (cluster *Cluster) StartRaftCluster(c *kubevip.Config) error {
 				// ensure that if this node is the leader, it is set as the leader
 				if localAddress == string(raftServer.Leader()) {
 					// Re-broadcast arp to ensure network stays up to date
-					if c.EnableARP == true {
+					if c.EnableARP {
 						// Gratuitous ARP, will broadcast to new MAC <-> IP
 						err = vip.ARPSendGratuitous(cluster.Network.IP(), c.Interface)
 						if err != nil {
@@ -143,7 +137,10 @@ func (cluster *Cluster) StartRaftCluster(c *kubevip.Config) error {
 					}
 				} else {
 					// (attempt to) Remove the virtual IP, incase it already exists to keep nodes clean
-					cluster.Network.DeleteIP()
+					err := cluster.Network.DeleteIP()
+					if err != nil {
+						log.Errorf("could not delete virtualIP: %v", err)
+					}
 					isLeader = false
 				}
 
@@ -166,7 +163,7 @@ func (cluster *Cluster) StartRaftCluster(c *kubevip.Config) error {
 
 					for x := range c.LoadBalancers {
 
-						if c.LoadBalancers[x].BindToVip == true {
+						if c.LoadBalancers[x].BindToVip {
 							err = VipLB.Add(cluster.Network.IP(), &c.LoadBalancers[x])
 							if err != nil {
 								log.Warnf("Error creating loadbalancer [%s] type [%s] -> error [%s]", c.LoadBalancers[x].Name, c.LoadBalancers[x].Type, err)
@@ -187,7 +184,7 @@ func (cluster *Cluster) StartRaftCluster(c *kubevip.Config) error {
 						}
 					}
 
-					if c.EnableARP == true {
+					if c.EnableARP {
 						// Gratuitous ARP, will broadcast to new MAC <-> IP
 						err = vip.ARPSendGratuitous(cluster.Network.IP(), c.Interface)
 						if err != nil {
@@ -220,7 +217,7 @@ func (cluster *Cluster) StartRaftCluster(c *kubevip.Config) error {
 						log.WithFields(log.Fields{"error": err, "ip": cluster.Network.IP(), "interface": cluster.Network.Interface()}).Error("Could not check ip")
 					}
 
-					if result == false {
+					if !result {
 						log.Error("This node is leader and is adopting the virtual IP")
 
 						err = cluster.Network.AddIP()
@@ -231,14 +228,14 @@ func (cluster *Cluster) StartRaftCluster(c *kubevip.Config) error {
 
 						for x := range c.LoadBalancers {
 
-							if c.LoadBalancers[x].BindToVip == true {
+							if c.LoadBalancers[x].BindToVip {
 								err = VipLB.Add(cluster.Network.IP(), &c.LoadBalancers[x])
 								if err != nil {
 									log.Warnf("Error creating loadbalancer [%s] type [%s] -> error [%s]", c.LoadBalancers[x].Name, c.LoadBalancers[x].Type, err)
 								}
 							}
 						}
-						if c.EnableARP == true {
+						if c.EnableARP {
 							// Gratuitous ARP, will broadcast to new MAC <-> IP
 							err = vip.ARPSendGratuitous(cluster.Network.IP(), c.Interface)
 							if err != nil {

pkg/cluster/singleNode.go

@@ -17,7 +17,7 @@ import (
 func (cluster *Cluster) StartSingleNode(c *kubevip.Config, disableVIP bool) error {
 	// Start kube-vip as a single node server
 
-	// TODO - Split all this code out as a seperate function
+	// TODO - Split all this code out as a separate function
 	log.Infoln("Starting kube-vip as a single node cluster")
 
 	log.Info("This node is assuming leadership of the cluster")
@@ -32,7 +32,7 @@ func (cluster *Cluster) StartSingleNode(c *kubevip.Config, disableVIP bool) erro
 	// Iterate through all Configurations
 	for x := range c.LoadBalancers {
 		// If the load balancer doesn't bind to the VIP
-		if c.LoadBalancers[x].BindToVip == false {
+		if !c.LoadBalancers[x].BindToVip {
 			err := nonVipLB.Add("", &c.LoadBalancers[x])
 			if err != nil {
 				log.Warnf("Error creating loadbalancer [%s] type [%s] -> error [%s]", c.LoadBalancers[x].Name, c.LoadBalancers[x].Type, err)
@@ -55,7 +55,7 @@ func (cluster *Cluster) StartSingleNode(c *kubevip.Config, disableVIP bool) erro
 		// Once we have the VIP running, start the load balancer(s) that bind to the VIP
 		for x := range c.LoadBalancers {
 
-			if c.LoadBalancers[x].BindToVip == true {
+			if c.LoadBalancers[x].BindToVip {
 				err = VipLB.Add(cluster.Network.IP(), &c.LoadBalancers[x])
 				if err != nil {
 					log.Warnf("Error creating loadbalancer [%s] type [%s] -> error [%s]", c.LoadBalancers[x].Name, c.LoadBalancers[x].Type, err)
@@ -64,7 +64,7 @@ func (cluster *Cluster) StartSingleNode(c *kubevip.Config, disableVIP bool) erro
 		}
 	}
 
-	if c.EnableARP == true {
+	if c.EnableARP {
 		// Gratuitous ARP, will broadcast to new MAC <-> IP
 		err := vip.ARPSendGratuitous(cluster.Network.IP(), c.Interface)
 		if err != nil {
@@ -73,6 +73,7 @@ func (cluster *Cluster) StartSingleNode(c *kubevip.Config, disableVIP bool) erro
 	}
 
 	go func() {
+		//nolint
 		for {
 			select {
 			case <-cluster.stop:
@@ -114,6 +115,7 @@ func (cluster *Cluster) StartLoadBalancerService(c *kubevip.Config, bgp *bgp.Ser
 
 	// use a Go context so we can tell the arp loop code when we
 	// want to step down
+	//nolint
 	ctxArp, cancelArp := context.WithCancel(context.Background())
 	defer cancelArp()
 
@@ -130,7 +132,7 @@ func (cluster *Cluster) StartLoadBalancerService(c *kubevip.Config, bgp *bgp.Ser
 		log.Warnf("%v", err)
 	}
 
-	if c.EnableARP == true {
+	if c.EnableARP {
 		ctxArp, cancelArp = context.WithCancel(context.Background())
 
 		ipString := cluster.Network.IP()
@@ -196,6 +198,7 @@ func (cluster *Cluster) StartLoadBalancerService(c *kubevip.Config, bgp *bgp.Ser
 	}
 
 	go func() {
+		//nolint
 		for {
 			select {
 			case <-cluster.stop:

pkg/kubevip/config_envvar.go

@@ -6,16 +6,16 @@ const (
 	//vipArp - defines if the arp broadcast should be enabled
 	vipArp = "vip_arp"
 
-	//vipLeaderElection - defines if the kubernetes algorithim should be used
+	//vipLeaderElection - defines if the kubernetes algorithm should be used
 	vipLeaderElection = "vip_leaderelection"
 
-	//vipLeaderElection - defines if the kubernetes algorithim should be used
+	//vipLeaderElection - defines if the kubernetes algorithm should be used
 	vipLeaseDuration = "vip_leaseduration"
 
-	//vipLeaderElection - defines if the kubernetes algorithim should be used
+	//vipLeaderElection - defines if the kubernetes algorithm should be used
 	vipRenewDeadline = "vip_renewdeadline"
 
-	//vipLeaderElection - defines if the kubernetes algorithim should be used
+	//vipLeaderElection - defines if the kubernetes algorithm should be used
 	vipRetryPeriod = "vip_retryperiod"
 
 	//vipLogLevel - defines the level of logging to produce (5 being the most verbose)
@@ -66,7 +66,7 @@ const (
 	vipLocalPeer = "vip_localpeer"
 
 	//vipRemotePeers defines the configuration of the local raft peer
-	vipRemotePeers = "vip_remotepeers"
+	// vipRemotePeers = "vip_remotepeers"
 
 	//vipAddPeersToLB defines that RAFT peers should be added to the load-balancer
 	vipAddPeersToLB = "vip_addpeerstolb"
@@ -98,7 +98,7 @@ const (
 	//bgpPeerAS defines the AS for a BGP peer
 	bgpPeerAS = "bgp_peeras"
 	//bgpPeerAS defines the AS for a BGP peer
-	bgpPeerPassword = "bgp_peerpass"
+	bgpPeerPassword = "bgp_peerpass" // nolint
 	//bgpMultiHop enables mulithop routing
 	bgpMultiHop = "bgp_multihop"
 	//bgpSourceIF defines the source interface for BGP peering
@@ -137,5 +137,5 @@ const (
 	lbBackends = "lb_backends"
 
 	//vipConfigMap defines the configmap that kube-vip will watch for service definitions
-	vipConfigMap = "vip_configmap"
+	// vipConfigMap = "vip_configmap"
 )

pkg/kubevip/config_generator.go

@@ -56,7 +56,7 @@ func ParseEnvironment(c *Config) error {
 		c.EnableLeaderElection = b
 	}
 
-	// Attempt to find the Lease configuration from teh environment variables
+	// Attempt to find the Lease configuration from the environment variables
 	env = os.Getenv(vipLeaseDuration)
 	if env != "" {
 		i, err := strconv.ParseInt(env, 10, 32)
@@ -196,7 +196,7 @@ func ParseEnvironment(c *Config) error {
 		c.EnableARP = b
 	}
 
-	//Removal of seperate peer
+	//Removal of separate peer
 	env = os.Getenv(vipLocalPeer)
 	if env != "" {
 		// Parse the string in format <id>:<address>:<port>
@@ -213,10 +213,10 @@ func ParseEnvironment(c *Config) error {
 		// Remove existing peers
 		c.RemotePeers = []RaftPeer{}
 
-		// Parse the remote peers (comma seperated)
+		// Parse the remote peers (comma separated)
 		s := strings.Split(env, ",")
 		if len(s) == 0 {
-			return fmt.Errorf("The Remote Peer List [%s] is unable to be parsed, should be in comma seperated format <id>:<address>:<port>", env)
+			return fmt.Errorf("The Remote Peer List [%s] is unable to be parsed, should be in comma separated format <id>:<address>:<port>", env)
 		}
 		for x := range s {
 			// Parse the each remote peer string in format <id>:<address>:<port>
@@ -426,10 +426,10 @@ func parseEnvironmentLoadBalancer(c *Config) error {
 		// Remove existing backends
 		c.LoadBalancers[0].Backends = []BackEnd{}
 
-		// Parse the remote peers (comma seperated)
+		// Parse the remote peers (comma separated)
 		s := strings.Split(env, ",")
 		if len(s) == 0 {
-			return fmt.Errorf("The Backends List [%s] is unable to be parsed, should be in comma seperated format <address>:<port>", env)
+			return fmt.Errorf("The Backends List [%s] is unable to be parsed, should be in comma separated format <address>:<port>", env)
 		}
 		for x := range s {
 			// Parse the each remote peer string in format <address>:<port>
@@ -473,7 +473,7 @@ func generatePodSpec(c *Config, imageVersion string, inCluster bool) *corev1.Pod
 		newEnvironment = append(newEnvironment, iface...)
 	}
 
-	// Detect if we should be using a seperate interface for sercices
+	// Detect if we should be using a separate interface for sercices
 	if c.ServicesInterface != "" {
 		// build environment variables
 		svcInterface := []corev1.EnvVar{
@@ -743,7 +743,7 @@ func generatePodSpec(c *Config, imageVersion string, inCluster bool) *corev1.Pod
 		})
 	}
 
-	// Parse peers into a comma seperated string
+	// Parse peers into a comma separated string
 	if len(c.RemotePeers) != 0 {
 		var peers string
 		for x := range c.RemotePeers {

pkg/kubevip/config_manager.go

@@ -55,7 +55,7 @@ func OpenConfig(path string) (*Config, error) {
 			return nil, err
 		}
 
-		// If data is read succesfully parse the yaml
+		// If data is read successfully parse the yaml
 		var c Config
 		err = yaml.Unmarshal(configData, &c)
 		if err != nil {

pkg/kubevip/config_types.go

@@ -99,7 +99,7 @@ type Config struct {
 // LeaderElection defines all of the settings for Kubernetes LeaderElection
 type LeaderElection struct {
 
-	// EnableLeaderElection will use the Kubernetes leader election algorithim
+	// EnableLeaderElection will use the Kubernetes leader election algorithm
 	EnableLeaderElection bool `yaml:"enableLeaderElection"`
 
 	// Lease Duration - length of time a lease can be held for

pkg/leaderElection/leaderelection.go

@@ -109,6 +109,7 @@ func NewLeaderElector(lec LeaderElectionConfig) (*LeaderElector, error) {
 }
 
 // LeaderElectionConfig defines the configuration for the leaderElection
+// nolint
 type LeaderElectionConfig struct {
 	// Lock is the resource that will be used for locking
 	Lock rl.Interface
@@ -191,7 +192,7 @@ type LeaderElector struct {
 	metrics leaderMetricsAdapter
 
 	// name is the name of the resource lock for debugging
-	name string
+	// name string
 }
 
 // Run starts the leader election loop

pkg/leaderElection/metrics.go

@@ -28,7 +28,7 @@ type leaderMetricsAdapter interface {
 	leaderOff(name string)
 }
 
-// GaugeMetric represents a single numerical value that can arbitrarily go up
+// SwitchMetric represents a single numerical value that can arbitrarily go up
 // and down.
 type SwitchMetric interface {
 	On(name string)
@@ -72,7 +72,8 @@ type MetricsProvider interface {
 
 type noopMetricsProvider struct{}
 
-func (_ noopMetricsProvider) NewLeaderMetric() SwitchMetric {
+// NewLeaderMetric returns a new SwitchMetric.
+func (nmp noopMetricsProvider) NewLeaderMetric() SwitchMetric {
 	return noopMetric{}
 }
 

pkg/loadbalancer/lb_connections.go

@@ -62,7 +62,7 @@ func persistentConnection(frontendConnection net.Conn, lb *kubevip.LoadBalancer)
 		wg.Done()
 	}()
 	// go func() {
-	// Begin copying recieving (endpoint -> back to frontend)
+	// Begin copying receiving (endpoint -> back to frontend)
 	bytes, err := io.Copy(frontendConnection, endpoint)
 	log.Debugf("[%d] bytes of data sent to client", bytes)
 	if err != nil {
@@ -116,7 +116,7 @@ func persistentUDPConnection(frontendConnection net.Conn, lb *kubevip.LoadBalanc
 		wg.Done()
 	}()
 	// go func() {
-	// Begin copying recieving (endpoint -> back to frontend)
+	// Begin copying receiving (endpoint -> back to frontend)
 	bytes, err := io.Copy(frontendConnection, endpoint)
 	log.Debugf("[%d] bytes of data sent to client", bytes)
 	if err != nil {

pkg/loadbalancer/lb_http.go

@@ -57,11 +57,10 @@ func (lb *LBInstance) startHTTP(bindAddress string) error {
 
 	server := &http.Server{Addr: frontEnd, Handler: mux}
 
-	go func() error {
+	go func() {
 		if err := server.ListenAndServe(); err != nil {
-			return err
+			log.Fatalf("error starting http server: %v", err)
 		}
-		return nil
 	}()
 
 	// If the stop channel is closed then the server will be gracefully shut down
@@ -120,7 +119,9 @@ func StartHTTP(lb *kubevip.LoadBalancer, address string) error {
 	mux := http.NewServeMux()
 	mux.HandleFunc("/", handler)
 	log.Infof("Starting server listening [%s]", frontEnd)
-	http.ListenAndServe(frontEnd, mux)
+	if err := http.ListenAndServe(frontEnd, mux); err != nil {
+		log.Fatalf("error serving: %v", err)
+	}
 	// Should never get here
 	return nil
 }

pkg/loadbalancer/lb_tcp.go

@@ -1,13 +1,11 @@
 package loadbalancer
 
 import (
-	"bytes"
 	"fmt"
 	"io"
 	"net"
 	"time"
 
-	"github.com/kube-vip/kube-vip/pkg/kubevip"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -61,118 +59,3 @@ func (lb *LBInstance) startTCP(bindAddress string) error {
 
 	return nil
 }
-
-// startTCPDNU - Start TCP service Do not use
-// This stops the service by closing the listener and then ignorning the error from Accept()
-func (lb *LBInstance) startTCPDNU(bindAddress string) error {
-	fullAddress := fmt.Sprintf("%s:%d", bindAddress, lb.instance.Port)
-	log.Infof("Starting TCP Load Balancer for service [%s]", fullAddress)
-
-	//l, err := net.Listen("tcp", fmt.Sprintf("%s:%d", bindAddress, lb.instance.Port))
-	laddr, err := net.ResolveTCPAddr("tcp", fullAddress)
-	if nil != err {
-		log.Errorln(err)
-	}
-	l, err := net.ListenTCP("tcp", laddr)
-	if nil != err {
-		return fmt.Errorf("Unable to bind [%s]", err.Error())
-	}
-	go func() {
-		<-lb.stop
-		log.Debugln("Closing listener")
-
-		// We've closed the stop channel
-		err = l.Close()
-		if err != nil {
-			return
-		}
-		// Close the stopped channel as the listener has been stopped
-		close(lb.stopped)
-
-	}()
-
-	go func() {
-		for {
-
-			fd, err := l.Accept()
-			if err != nil {
-				// Check it it's an accept timeout
-				if opErr, ok := err.(*net.OpError); ok && opErr.Timeout() {
-					continue
-				} else if err != io.EOF {
-					log.Errorf("TCP Accept error [%s]", err)
-					return
-				}
-			}
-			go persistentConnection(fd, lb.instance)
-			//go processRequests(lb.instance, fd)
-		}
-		//	}
-	}()
-	log.Infof("Load Balancer [%s] started", lb.instance.Name)
-
-	return nil
-}
-
-// user -> [LB]
-// [LB] (select end pot) -> [endpoint]
-//
-//
-//
-//
-//
-//
-
-func processRequests(lb *kubevip.LoadBalancer, frontendConnection net.Conn) {
-	for {
-		// READ FROM client
-		buf := make([]byte, 1024*1024)
-		datalen, err := frontendConnection.Read(buf)
-		if err != nil {
-			log.Fatalf("%v", err)
-		}
-		log.Debugf("Sent [%d] bytes to the LB", datalen)
-		data := buf[0:datalen]
-
-		// Connect to Endpoint
-		ep, err := lb.ReturnEndpointAddr()
-		if err != nil {
-			log.Errorf("No Backends available")
-		}
-		log.Debugf("Attempting endpoint [%s]", ep)
-
-		endpoint, err := net.Dial("tcp", ep)
-		if err != nil {
-			fmt.Println("dial error:", err)
-			// return nil, err
-		}
-		log.Debugf("succesfully connected to [%s]", ep)
-
-		// Set a timeout
-		endpoint.SetReadDeadline(time.Now().Add(time.Second * 1))
-
-		b, err := endpointRequest(endpoint, ep, string(data))
-
-		_, err = frontendConnection.Write(b)
-		if err != nil {
-			log.Fatal("Write: ", err)
-		}
-	}
-}
-
-// endpointRequest will take an endpoint address and send the data and wait for the response
-func endpointRequest(endpoint net.Conn, endpointAddr, request string) ([]byte, error) {
-
-	// defer conn.Close()
-	datalen, err := fmt.Fprintf(endpoint, request)
-	if err != nil {
-		fmt.Println("dial error:", err)
-		return nil, err
-	}
-	log.Debugf("Sent [%d] bytes to the endpoint", datalen)
-
-	var b bytes.Buffer
-	io.Copy(&b, endpoint)
-	log.Debugf("Recieved [%d] from the endpoint", b.Len())
-	return b.Bytes(), nil
-}

pkg/manager/manager.go

@@ -31,7 +31,7 @@ type Manager struct {
 	config    *kubevip.Config
 
 	// Manager services
-	service bool
+	// service bool
 
 	// Keeps track of all running instances
 	serviceInstances []Instance
@@ -45,7 +45,7 @@ type Manager struct {
 	// This channel is used to signal a shutdown
 	signalChan chan os.Signal
 
-	// This is a promethues counter used to count the number of events received
+	// This is a prometheus counter used to count the number of events received
 	// from the service watcher
 	countServiceWatchEvent *prometheus.CounterVec
 }
@@ -148,6 +148,7 @@ func (sm *Manager) Start() error {
 	signal.Notify(sm.signalChan, syscall.SIGTERM)
 
 	// Add Notification for SIGKILL (sent from Kubernetes)
+	//nolint
 	signal.Notify(sm.signalChan, syscall.SIGKILL)
 
 	// If BGP is enabled then we start a server instance that will broadcast VIPs

pkg/manager/manager_arp.go

@@ -110,7 +110,7 @@ func (sm *Manager) startARP() error {
 			// Set the struct to nil so nothing should use it in future
 			sm.upnp = nil
 		} else {
-			log.Infof("Succesfully enabled UPNP, Gateway address [%s]", sm.upnp.GatewayOutsideIP)
+			log.Infof("Successfully enabled UPNP, Gateway address [%s]", sm.upnp.GatewayOutsideIP)
 		}
 	}
 

pkg/manager/manager_bgp.go

@@ -19,7 +19,7 @@ func (sm *Manager) startBGP() error {
 	//var ns string
 	var err error
 
-	// If Packet is enabled then we can begin our preperation work
+	// If Packet is enabled then we can begin our preparation work
 	var packetClient *packngo.Client
 	if sm.config.EnableMetal {
 		if sm.config.ProviderConfig != "" {

pkg/manager/prom.go

@@ -2,6 +2,7 @@ package manager
 
 import "github.com/prometheus/client_golang/prometheus"
 
+// PrometheusCollector defines a service watch event counter.
 func (sm *Manager) PrometheusCollector() []prometheus.Collector {
 	return []prometheus.Collector{sm.countServiceWatchEvent}
 }

pkg/manager/services.go

@@ -44,14 +44,18 @@ func (sm *Manager) deleteService(uid string) error {
 		} else {
 			// Flip the found when we match
 			found = true
-			if sm.serviceInstances[x].isDHCP == true {
+			if sm.serviceInstances[x].isDHCP {
 				sm.serviceInstances[x].dhcpClient.Stop()
 				macvlan, err := netlink.LinkByName(sm.serviceInstances[x].dhcpInterface)
 				if err != nil {
-					return fmt.Errorf("Error finding VIP Interface, for deleting DHCP Link : %v", err)
+					return fmt.Errorf("error finding VIP Interface: %v", err)
+				}
+
+				err = netlink.LinkDel(macvlan)
+				if err != nil {
+					return fmt.Errorf("error deleting DHCP Link : %v", err)
 				}
 
-				netlink.LinkDel(macvlan)
 			}
 			if sm.serviceInstances[x].vipConfig.EnableBGP {
 				cidrVip := fmt.Sprintf("%s/%s", sm.serviceInstances[x].vipConfig.VIP, sm.serviceInstances[x].vipConfig.VIPCIDR)
@@ -61,8 +65,8 @@ func (sm *Manager) deleteService(uid string) error {
 		}
 	}
 	// If we've been through all services and not found the correct one then error
-	if found == false {
-		return fmt.Errorf("Unable to find/stop service [%s]", uid)
+	if !found {
+		return fmt.Errorf("unable to find/stop service [%s]", uid)
 	}
 
 	// Update the service array

pkg/manager/watcher.go

@@ -58,7 +58,7 @@ func (sm *Manager) servicesWatcher(ctx context.Context) error {
 			if !ok {
 				return fmt.Errorf("Unable to parse Kubernetes services from API watcher")
 			}
-			
+
 			if svc.Spec.LoadBalancerIP == "" {
 				log.Infof("Service [%s] has been addded/modified, it has no assigned external addresses", svc.Name)
 			} else {
@@ -183,7 +183,6 @@ func (sm *Manager) annotationsWatcher() error {
 			sm.config.BGPPeerConfig = bgpPeer
 
 			rw.Stop()
-			break
 		case watch.Deleted:
 			node, ok := event.Object.(*v1.Node)
 			if !ok {

pkg/packet/eip.go

@@ -19,7 +19,7 @@ func AttachEIP(c *packngo.Client, k *kubevip.Config, hostname string) error {
 		// Fallback to attempting to find the project by name
 		proj := findProject(k.MetalProject, c)
 		if proj == nil {
-			return fmt.Errorf("Unable to find Project [%s]", k.MetalProject)
+			return fmt.Errorf("unable to find Project [%s]", k.MetalProject)
 		}
 
 		projID = proj.ID
@@ -40,7 +40,10 @@ func AttachEIP(c *packngo.Client, k *kubevip.Config, hostname string) error {
 			// If attachements already exist then remove them
 			if len(ip.Assignments) != 0 {
 				hrefID := path.Base(ip.Assignments[0].Href)
-				c.DeviceIPs.Unassign(hrefID)
+				_, err := c.DeviceIPs.Unassign(hrefID)
+				if err != nil {
+					return fmt.Errorf("unable to unassign deviceIP %q: %v", hrefID, err)
+				}
 			}
 		}
 	}
@@ -48,7 +51,7 @@ func AttachEIP(c *packngo.Client, k *kubevip.Config, hostname string) error {
 	// Lookup this server through the packet API
 	thisDevice := findSelf(c, projID)
 	if thisDevice == nil {
-		return fmt.Errorf("Unable to find local/this device in packet API")
+		return fmt.Errorf("unable to find local/this device in packet API")
 	}
 
 	// Assign the EIP to this device

pkg/service/manager.go

@@ -45,7 +45,7 @@ type Manager struct {
 	// This channel is used to signal a shutdown
 	signalChan chan os.Signal
 
-	// This is a promethues counter used to count the number of events received
+	// This is a prometheus counter used to count the number of events received
 	// from the service watcher
 	countServiceWatchEvent *prometheus.CounterVec
 }
@@ -77,7 +77,7 @@ type Instance struct {
 // NewManager will create a new managing object
 func NewManager(configMap string, config *kubevip.Config) (*Manager, error) {
 	var clientset *kubernetes.Clientset
-	if OutSideCluster == false {
+	if !OutSideCluster {
 		// This will attempt to load the configuration when running within a POD
 		cfg, err := rest.InClusterConfig()
 		if err != nil {

pkg/service/manager_arp.go

@@ -38,7 +38,7 @@ func (sm *Manager) startARP() error {
 			// Set the struct to nil so nothing should use it in future
 			sm.upnp = nil
 		} else {
-			log.Infof("Succesfully enabled UPNP, Gateway address [%s]", sm.upnp.GatewayOutsideIP)
+			log.Infof("Successfully enabled UPNP, Gateway address [%s]", sm.upnp.GatewayOutsideIP)
 		}
 	}
 
@@ -89,6 +89,7 @@ func (sm *Manager) startARP() error {
 	signal.Notify(signalChan, syscall.SIGTERM)
 
 	// Add Notification for SIGKILL (sent from Kubernetes)
+	//nolint
 	signal.Notify(signalChan, syscall.SIGKILL)
 	go func() {
 		<-signalChan
@@ -112,7 +113,9 @@ func (sm *Manager) startARP() error {
 		RetryPeriod:     1 * time.Second,
 		Callbacks: leaderelection.LeaderCallbacks{
 			OnStartedLeading: func(ctx context.Context) {
-				sm.servicesWatcher(ctx)
+				if err := sm.servicesWatcher(ctx); err != nil {
+					log.Fatalf("error starting services watcher: %v", err)
+				}
 			},
 			OnStoppedLeading: func() {
 				// we can do cleanup here

pkg/service/manager_bgp.go

@@ -15,7 +15,7 @@ import (
 // Start will begin the Manager, which will start services and watch the configmap
 func (sm *Manager) startBGP() error {
 
-	// If Packet is enabled then we can begin our preperation work
+	// If Packet is enabled then we can begin our preparation work
 	var packetClient *packngo.Client
 	var err error
 	if sm.config.EnableMetal {
@@ -63,6 +63,7 @@ func (sm *Manager) startBGP() error {
 	signal.Notify(signalChan, syscall.SIGTERM)
 
 	// Add Notification for SIGKILL (sent from Kubernetes)
+	//nolint
 	signal.Notify(signalChan, syscall.SIGKILL)
 	go func() {
 		<-signalChan
@@ -71,7 +72,9 @@ func (sm *Manager) startBGP() error {
 		cancel()
 	}()
 
-	sm.servicesWatcher(ctx)
+	if err := sm.servicesWatcher(ctx); err != nil {
+		log.Fatalf("error starting services watcher: %v", err)
+	}
 
 	log.Infof("Shutting down Kube-Vip")
 

pkg/service/services.go

@@ -26,8 +26,8 @@ func (sm *Manager) stopService(uid string) error {
 			sm.serviceInstances[x].cluster.Stop()
 		}
 	}
-	if found == false {
-		return fmt.Errorf("Unable to find/stop service [%s]", uid)
+	if !found {
+		return fmt.Errorf("unable to find/stop service [%s]", uid)
 	}
 	return nil
 }
@@ -42,12 +42,14 @@ func (sm *Manager) deleteService(uid string) error {
 		} else {
 			// Flip the found when we match
 			found = true
-			if sm.serviceInstances[x].isDHCP == true {
+			if sm.serviceInstances[x].isDHCP {
 				macvlan, err := netlink.LinkByName(sm.serviceInstances[x].dhcpInterface)
 				if err != nil {
-					return fmt.Errorf("Error finding VIP Interface, for deleting DHCP Link : %v", err)
+					return fmt.Errorf("error finding VIP Interface, for deleting DHCP Link : %v", err)
+				}
+				if err := netlink.LinkDel(macvlan); err != nil {
+					return fmt.Errorf("error deleing link: %v", err)
 				}
-				netlink.LinkDel(macvlan)
 			}
 			if sm.serviceInstances[x].vipConfig.EnableBGP {
 				cidrVip := fmt.Sprintf("%s/%s", sm.serviceInstances[x].vipConfig.VIP, sm.serviceInstances[x].vipConfig.VIPCIDR)
@@ -57,8 +59,8 @@ func (sm *Manager) deleteService(uid string) error {
 		}
 	}
 	// If we've been through all services and not found the correct one then error
-	if found == false {
-		return fmt.Errorf("Unable to find/stop service [%s]", uid)
+	if !found {
+		return fmt.Errorf("unable to find/stop service [%s]", uid)
 	}
 
 	// Update the service array
@@ -95,7 +97,7 @@ func (sm *Manager) syncServices(service *v1.Service) error {
 	}
 
 	// This instance wasn't found, we need to add it to the manager
-	if foundInstance == false {
+	if !foundInstance {
 		// Create new service
 		var newService Instance
 		newService.UID = newServiceUID

pkg/service/watcher.go

@@ -12,41 +12,8 @@ import (
 	"k8s.io/apimachinery/pkg/watch"
 	"k8s.io/client-go/tools/cache"
 	watchtools "k8s.io/client-go/tools/watch"
-
-	"github.com/kube-vip/kube-vip/pkg/kubevip"
 )
 
-func rebuildEndpoints(eps v1.Endpoints) []kubevip.BackEnd {
-	var addresses []string
-	var ports []int32
-
-	for x := range eps.Subsets {
-		// Loop over addresses
-		for y := range eps.Subsets[x].Addresses {
-			addresses = append(addresses, eps.Subsets[x].Addresses[y].IP)
-		}
-		for y := range eps.Subsets[x].Ports {
-			ports = append(ports, eps.Subsets[x].Ports[y].Port)
-		}
-	}
-	var newBackend []kubevip.BackEnd
-
-	// Build endpoints
-	for x := range addresses {
-		for y := range ports {
-			// Print out Backends if debug logging is enabled
-			if log.GetLevel() == log.DebugLevel {
-				fmt.Printf("-> Address: %s:%d \n", addresses[x], ports[y])
-			}
-			newBackend = append(newBackend, kubevip.BackEnd{
-				Address: addresses[x],
-				Port:    int(ports[y]),
-			})
-		}
-	}
-	return newBackend
-}
-
 // This file handles the watching of a services endpoints and updates a load balancers endpoint configurations accordingly
 func (sm *Manager) servicesWatcher(ctx context.Context) error {
 	// Watch function

pkg/vip/address.go

@@ -92,7 +92,7 @@ func NewConfig(address string, iface string, isDDNS bool) (Network, error) {
 	return result, err
 }
 
-//AddIP - Add an IP address to the interface
+// AddIP - Add an IP address to the interface
 func (configurator *network) AddIP() error {
 	if err := netlink.AddrReplace(configurator.link, configurator.address); err != nil {
 		return errors.Wrap(err, "could not add ip")
@@ -100,7 +100,7 @@ func (configurator *network) AddIP() error {
 	return nil
 }
 
-//DeleteIP - Remove an IP address from the interface
+// DeleteIP - Remove an IP address from the interface
 func (configurator *network) DeleteIP() error {
 	result, err := configurator.IsSet()
 	if err != nil {

pkg/vip/arp.go

@@ -1,6 +1,7 @@
+//go:build linux
 // +build linux
 
-// These syscalls are only supported on Linux, so this uses a build directive during compilation. Other OS's will use the arp_unsupported.go and recieve an error
+// These syscalls are only supported on Linux, so this uses a build directive during compilation. Other OS's will use the arp_unsupported.go and receive an error
 
 package vip
 

pkg/vip/dhcp.go

@@ -1,6 +1,7 @@
-// It"s DHCP client implementation that refers to https://www.rfc-editor.org/rfc/rfc2131.html
 package vip
 
+// DHCP client implementation that refers to https://www.rfc-editor.org/rfc/rfc2131.html
+
 import (
 	"context"
 	"fmt"
@@ -16,7 +17,7 @@ import (
 // Callback is a function called on certain events
 type Callback func(*nclient4.Lease)
 
-// Client is a DHCP client, responsible for maintaining ipv4 lease for one specified interface
+// DHCPClient is responsible for maintaining ipv4 lease for one specified interface
 type DHCPClient struct {
 	iface          *net.Interface
 	lease          *nclient4.Lease
@@ -26,6 +27,7 @@ type DHCPClient struct {
 	onBound        Callback
 }
 
+// NewDHCPClient returns a new DHCP Client.
 func NewDHCPClient(iface *net.Interface, initRebootFlag bool, requestedIP string, onBound Callback) *DHCPClient {
 	return &DHCPClient{
 		iface:          iface,
@@ -163,10 +165,12 @@ func (c *DHCPClient) Start() {
 
 func (c *DHCPClient) request() (*nclient4.Lease, error) {
 	broadcast, err := nclient4.New(c.iface.Name)
-	defer broadcast.Close()
 	if err != nil {
 		return nil, fmt.Errorf("create a broadcast client for iface %s failed, error: %w", c.iface.Name, err)
 	}
+
+	defer broadcast.Close()
+
 	return broadcast.Request(context.TODO())
 }
 

pkg/vip/dns.go

@@ -40,8 +40,13 @@ func (d *ipUpdater) Run(ctx context.Context) {
 				}
 
 				log.Infof("setting %s as an IP", ip)
-				d.vip.SetIP(ip)
-				d.vip.AddIP()
+				if err := d.vip.SetIP(ip); err != nil {
+					log.Errorf("setting %s as an IP: %v", ip, err)
+				}
+
+				if err := d.vip.AddIP(); err != nil {
+					log.Errorf("error adding virtual IP: %v", err)
+				}
 
 			}
 			time.Sleep(3 * time.Second)

pkg/vip/ndp.go

@@ -9,12 +9,14 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
+// NdpResponder defines the parameters for the NDP connection.
 type NdpResponder struct {
 	intf         string
 	hardwareAddr net.HardwareAddr
 	conn         *ndp.Conn
 }
 
+// NewNDPResponder takes an ifaceName and returns a new NDP responder and error if encountered.
 func NewNDPResponder(ifaceName string) (*NdpResponder, error) {
 	iface, err := net.InterfaceByName(ifaceName)
 	if err != nil {
@@ -35,10 +37,12 @@ func NewNDPResponder(ifaceName string) (*NdpResponder, error) {
 	return ret, nil
 }
 
+// Close closes the NDP responder connection.
 func (n *NdpResponder) Close() error {
 	return n.conn.Close()
 }
 
+// SendGratuitous broadcasts an NDP update or returns error if encountered.
 func (n *NdpResponder) SendGratuitous(address string) error {
 	ip := net.ParseIP(address)
 	if ip == nil {

testing/e2e/e2e_test.go

@@ -227,7 +227,7 @@ func assertControlPlaneIsRoutable(controlPlaneVIP string, transportTimeout, even
 	}
 
 	transport := &http.Transport{
-		TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
+		TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, // nolint
 	}
 	client := &http.Client{Transport: transport, Timeout: transportTimeout}
 	Eventually(func() int {
@@ -235,6 +235,7 @@ func assertControlPlaneIsRoutable(controlPlaneVIP string, transportTimeout, even
 		if resp == nil {
 			return -1
 		}
+		defer resp.Body.Close()
 		return resp.StatusCode
 	}, eventuallyTimeout).Should(Equal(http.StatusOK), "Failed to connect to VIP")
 }