Refactor handling of local traffic detection.

pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/after/v1alpha1.yaml

@@ -13,6 +13,7 @@ conntrack:
   min: 131072
   tcpCloseWaitTimeout: 1h0m0s
   tcpEstablishedTimeout: 24h0m0s
+detectLocalMode: ""
 enableProfiling: false
 healthzBindAddress: 0.0.0.0:10256
 hostnameOverride: ""

pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/roundtrip/default/v1alpha1.yaml

@@ -13,6 +13,7 @@ conntrack:
   min: 131072
   tcpCloseWaitTimeout: 1h0m0s
   tcpEstablishedTimeout: 24h0m0s
+detectLocalMode: ""
 enableProfiling: false
 healthzBindAddress: 0.0.0.0:10256
 hostnameOverride: ""

pkg/proxy/apis/config/types.go

@@ -164,6 +164,8 @@ type KubeProxyConfiguration struct {
 	Winkernel KubeProxyWinkernelConfiguration
 	// ShowHiddenMetricsForVersion is the version for which you want to show hidden metrics.
 	ShowHiddenMetricsForVersion string
+	// DetectLocalMode determines mode to use for detecting local traffic, defaults to LocalModeClusterCIDR
+	DetectLocalMode LocalMode
 }
 
 // Currently, three modes of proxy are available in Linux platform: 'userspace' (older, going to be EOL), 'iptables'
@@ -188,6 +190,14 @@ const (
 	ProxyModeKernelspace ProxyMode = "kernelspace"
 )
 
+// LocalMode represents modes to detect local traffic from the node
+type LocalMode string
+
+// Currently supported modes for LocalMode
+const (
+	LocalModeClusterCIDR LocalMode = "ClusterCIDR"
+)
+
 // IPVSSchedulerMethod is the algorithm for allocating TCP connections and
 // UDP datagrams to real servers.  Scheduling algorithms are imple-
 //wanted as kernel modules. Ten are shipped with the Linux Virtual Server.
@@ -246,6 +256,22 @@ func (m *ProxyMode) Type() string {
 	return "ProxyMode"
 }
 
+func (m *LocalMode) Set(s string) error {
+	*m = LocalMode(s)
+	return nil
+}
+
+func (m *LocalMode) String() string {
+	if m != nil {
+		return string(*m)
+	}
+	return ""
+}
+
+func (m *LocalMode) Type() string {
+	return "LocalMode"
+}
+
 type ConfigurationMap map[string]string
 
 func (m *ConfigurationMap) String() string {

pkg/proxy/apis/config/v1alpha1/zz_generated.conversion.go

@@ -121,6 +121,7 @@ func autoConvert_v1alpha1_KubeProxyConfiguration_To_config_KubeProxyConfiguratio
 		return err
 	}
 	out.ShowHiddenMetricsForVersion = in.ShowHiddenMetricsForVersion
+	out.DetectLocalMode = config.LocalMode(in.DetectLocalMode)
 	return nil
 }
 
@@ -159,6 +160,7 @@ func autoConvert_config_KubeProxyConfiguration_To_v1alpha1_KubeProxyConfiguratio
 		return err
 	}
 	out.ShowHiddenMetricsForVersion = in.ShowHiddenMetricsForVersion
+	out.DetectLocalMode = v1alpha1.LocalMode(in.DetectLocalMode)
 	return nil
 }