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127 lines
3.9 KiB
127 lines
3.9 KiB
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package gce
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import (
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"crypto/sha1"
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"encoding/hex"
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"fmt"
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"strings"
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"github.com/GoogleCloudPlatform/k8s-cloud-provider/pkg/cloud"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/types"
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)
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// Internal Load Balancer
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// Instance groups remain legacy named to stay consistent with ingress
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func makeInstanceGroupName(clusterID string) string {
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prefix := "k8s-ig"
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// clusterID might be empty for legacy clusters
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if clusterID == "" {
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return prefix
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}
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return fmt.Sprintf("%s--%s", prefix, clusterID)
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}
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func makeBackendServiceName(loadBalancerName, clusterID string, shared bool, scheme cloud.LbScheme, protocol v1.Protocol, svcAffinity v1.ServiceAffinity) string {
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if shared {
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hash := sha1.New()
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// For every non-nil option, hash its value. Currently, only service affinity is relevant.
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hash.Write([]byte(string(svcAffinity)))
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hashed := hex.EncodeToString(hash.Sum(nil))
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hashed = hashed[:16]
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// k8s- 4
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// {clusterid}- 17
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// {scheme}- 9 (internal/external)
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// {protocol}- 4 (tcp/udp)
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// nmv1- 5 (naming convention version)
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// {suffix} 16 (hash of settings)
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// -----------------
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// 55 characters used
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return fmt.Sprintf("k8s-%s-%s-%s-nmv1-%s", clusterID, strings.ToLower(string(scheme)), strings.ToLower(string(protocol)), hashed)
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}
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return loadBalancerName
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}
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func makeHealthCheckName(loadBalancerName, clusterID string, shared bool) string {
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if shared {
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return fmt.Sprintf("k8s-%s-node", clusterID)
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}
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return loadBalancerName
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}
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func makeHealthCheckFirewallNameFromHC(healthCheckName string) string {
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return healthCheckName + "-hc"
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}
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func makeHealthCheckFirewallName(loadBalancerName, clusterID string, shared bool) string {
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if shared {
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return fmt.Sprintf("k8s-%s-node-hc", clusterID)
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}
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return loadBalancerName + "-hc"
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}
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func makeBackendServiceDescription(nm types.NamespacedName, shared bool) string {
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if shared {
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return ""
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}
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return fmt.Sprintf(`{"kubernetes.io/service-name":"%s"}`, nm.String())
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}
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// External Load Balancer
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// makeServiceDescription is used to generate descriptions for forwarding rules and addresses.
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func makeServiceDescription(serviceName string) string {
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return fmt.Sprintf(`{"kubernetes.io/service-name":"%s"}`, serviceName)
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}
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// MakeNodesHealthCheckName returns name of the health check resource used by
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// the GCE load balancers (l4) for performing health checks on nodes.
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func MakeNodesHealthCheckName(clusterID string) string {
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return fmt.Sprintf("k8s-%v-node", clusterID)
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}
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func makeHealthCheckDescription(serviceName string) string {
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return fmt.Sprintf(`{"kubernetes.io/service-name":"%s"}`, serviceName)
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}
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// MakeHealthCheckFirewallName returns the firewall name used by the GCE load
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// balancers (l4) for performing health checks.
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func MakeHealthCheckFirewallName(clusterID, hcName string, isNodesHealthCheck bool) string {
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if isNodesHealthCheck {
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return MakeNodesHealthCheckName(clusterID) + "-http-hc"
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}
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return "k8s-" + hcName + "-http-hc"
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}
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// MakeFirewallName returns the firewall name used by the GCE load
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// balancers (l4) for serving traffic.
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func MakeFirewallName(name string) string {
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return fmt.Sprintf("k8s-fw-%s", name)
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}
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func makeFirewallDescription(serviceName, ipAddress string) string {
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return fmt.Sprintf(`{"kubernetes.io/service-name":"%s", "kubernetes.io/service-ip":"%s"}`,
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serviceName, ipAddress)
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}
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