Add internal LB logic

pkg/cloudprovider/providers/gce/gce_loadbalancer_naming.go

+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package gce
+
+import (
+	"fmt"
+	"strings"
+
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/api/v1"
+)
+
+// Internal Load Balancer
+
+// Instance groups remain legacy named to stay consistent with ingress
+func makeInstanceGroupName(clusterID string) string {
+	return fmt.Sprintf("k8s-ig--%s", clusterID)
+}
+
+func makeBackendServiceName(loadBalancerName, clusterID string, shared bool, scheme lbScheme, protocol v1.Protocol, svcAffinity v1.ServiceAffinity) string {
+	if shared {
+		affinity := ""
+		switch svcAffinity {
+		case v1.ServiceAffinityClientIP:
+			affinity = "clientip"
+		default:
+			affinity = "noaffinity"
+		}
+
+		return fmt.Sprintf("k8s-%s-%s-%s-%s", clusterID, strings.ToLower(string(scheme)), strings.ToLower(string(protocol)), affinity)
+	}
+	return loadBalancerName
+}
+
+func makeHealthCheckName(loadBalancerName, clusterID string, shared bool) string {
+	if shared {
+		return fmt.Sprintf("k8s-%s-node", clusterID)
+	}
+
+	return loadBalancerName
+}
+
+func makeHealthCheckFirewallkNameFromHC(healthCheckName string) string {
+	return healthCheckName + "-hc"
+}
+
+func makeHealthCheckFirewallkName(loadBalancerName, clusterID string, shared bool) string {
+	if shared {
+		return fmt.Sprintf("k8s-%s-node-hc", clusterID)
+	}
+	return loadBalancerName + "-hc"
+}
+
+func makeBackendServiceDescription(nm types.NamespacedName, shared bool) string {
+	if shared {
+		return ""
+	}
+	return fmt.Sprintf(`{"kubernetes.io/service-name":"%s"`, nm.String())
+}
+
+// External Load Balancer
+
+// makeNodesHealthCheckName returns name of the health check resource used by
+// the GCE load balancers (l4) for performing health checks on nodes.
+func makeNodesHealthCheckName(clusterID string) string {
+	return fmt.Sprintf("k8s-%v-node", clusterID)
+}
+
+func makeHealthCheckDescription(serviceName string) string {
+	return fmt.Sprintf(`{"kubernetes.io/service-name":"%s"}`, serviceName)
+}
+
+// MakeHealthCheckFirewallName returns the firewall name used by the GCE load
+// balancers (l4) for performing health checks.
+func MakeHealthCheckFirewallName(clusterID, hcName string, isNodesHealthCheck bool) string {
+	if isNodesHealthCheck {
+		return makeNodesHealthCheckName(clusterID) + "-http-hc"
+	}
+	return "k8s-" + hcName + "-http-hc"
+}
+
+func makeFirewallName(name string) string {
+	return fmt.Sprintf("k8s-fw-%s", name)
+}
+
+func makeFirewallDescription(serviceName, ipAddress string) string {
+	return fmt.Sprintf(`{"kubernetes.io/service-name":"%s", "kubernetes.io/service-ip":"%s"}`,
+		serviceName, ipAddress)
+}