diff options
Diffstat (limited to 'src/kube2msb/kube_work.go')
| -rw-r--r-- | src/kube2msb/kube_work.go | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/kube2msb/kube_work.go b/src/kube2msb/kube_work.go new file mode 100644 index 0000000..4e99cbd --- /dev/null +++ b/src/kube2msb/kube_work.go @@ -0,0 +1,195 @@ +/* +Copyright 2017 ZTE, Inc. and others. + +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 main + +import ( + "log" + "sync" + + kapi "k8s.io/kubernetes/pkg/api" +) + +type KubeBookKeeper interface { + AddService(*kapi.Service) + RemoveService(*kapi.Service) + UpdateService(*kapi.Service) + AddPod(*kapi.Pod) + RemovePod(*kapi.Pod) + UpdatePod(*kapi.Pod) +} + +type ClientBookKeeper struct { + sync.Mutex + KubeBookKeeper + services map[string]*kapi.Service + pods map[string]*kapi.Pod + msbQueue chan<- MSBWork +} + +func newClientBookKeeper() *ClientBookKeeper { + return &ClientBookKeeper{ + services: make(map[string]*kapi.Service), + pods: make(map[string]*kapi.Pod), + } +} + +func (client *ClientBookKeeper) AddService(svc *kapi.Service) { + client.Lock() + defer client.Unlock() + if _, ok := svc.ObjectMeta.Annotations[serviceKey]; !ok { + log.Println("Not the target, skip this ADD notification for service:", svc.Name) + return + } + + if _, ok := client.services[svc.Name]; ok { + log.Printf("service:%s already exist. skip this ADD notification.", svc.Name) + return + } + + if kapi.IsServiceIPSet(svc) { + if svc.Spec.Type == kapi.ServiceTypeClusterIP || svc.Spec.Type == kapi.ServiceTypeNodePort { + log.Printf("Adding %s service:%s", svc.Spec.Type, svc.Name) + client.msbQueue <- MSBWork{ + Action: MSBWorkAddService, + ServiceInfo: svc.ObjectMeta.Annotations[serviceKey], + IPAddress: svc.Spec.ClusterIP, + } + } else if svc.Spec.Type == kapi.ServiceTypeLoadBalancer { + log.Println("Adding LoadBalancerIP service:", svc.Name) + client.msbQueue <- MSBWork{ + Action: MSBWorkAddService, + ServiceInfo: svc.ObjectMeta.Annotations[serviceKey], + IPAddress: svc.Spec.LoadBalancerIP, + } + } else { + log.Printf("Service Type:%s for Service:%s is not supported", svc.Spec.Type, svc.Name) + return + } + client.services[svc.Name] = svc + log.Println("Queued Service to be added: ", svc.Name) + } else { + // if ClusterIP is not set, do not create a DNS records + log.Printf("Skipping dns record for headless service: %s\n", svc.Name) + } +} + +func (client *ClientBookKeeper) RemoveService(svc *kapi.Service) { + client.Lock() + defer client.Unlock() + if _, ok := svc.ObjectMeta.Annotations[serviceKey]; !ok { + log.Println("Not the target, skip this Remove notification for service:", svc.Name) + return + } + + if _, ok := client.services[svc.Name]; !ok { + log.Printf("Service:%s not exist. skip this REMOVE notification.", svc.Name) + return + } + + if svc.Spec.Type == kapi.ServiceTypeClusterIP || svc.Spec.Type == kapi.ServiceTypeNodePort { + log.Printf("Removing %s service:%s", svc.Spec.Type, svc.Name) + //Perform All DNS Removes + client.msbQueue <- MSBWork{ + Action: MSBWorkRemoveService, + ServiceInfo: svc.ObjectMeta.Annotations[serviceKey], + IPAddress: svc.Spec.ClusterIP, + } + } else if svc.Spec.Type == kapi.ServiceTypeLoadBalancer { + log.Println("Removing LoadBalancerIP service:", svc.Name) + client.msbQueue <- MSBWork{ + Action: MSBWorkRemoveService, + ServiceInfo: svc.ObjectMeta.Annotations[serviceKey], + IPAddress: svc.Spec.LoadBalancerIP, + } + } else { + log.Printf("Service Type:%s for Service:%s is not supported", svc.Spec.Type, svc.Name) + return + } + delete(client.services, svc.Name) + log.Println("Queued Service to be removed: ", svc.Name) +} + +func (client *ClientBookKeeper) UpdateService(svc *kapi.Service) { + if _, ok := svc.ObjectMeta.Annotations[serviceKey]; !ok { + log.Println("Not the target, skip this Update notification for service:", svc.Name) + return + } + + client.RemoveService(svc) + client.AddService(svc) +} + +func (client *ClientBookKeeper) AddPod(pod *kapi.Pod) { + client.Lock() + defer client.Unlock() + if _, ok := pod.Annotations[serviceKey]; !ok { + log.Println("Not the target, skip this ADD notification for pod:", pod.Name) + return + } + + if _, ok := client.pods[pod.Name]; ok { + log.Printf("Pod:%s already exist. skip this ADD notification.", pod.Name) + return + } + + //newly added Pod + if pod.Name == "" || pod.Status.PodIP == "" { + log.Printf("Pod:%s has neither name nor pod ip. skip this ADD notification.", pod.Name) + addMap[pod.Name] = pod + return + } + + //Perform All DNS Adds + client.msbQueue <- MSBWork{ + Action: MSBWorkAddPod, + ServiceInfo: pod.Annotations[serviceKey], + IPAddress: pod.Status.PodIP, + } + client.pods[pod.Name] = pod + log.Println("Queued Pod to be added: ", pod.Name) +} + +func (client *ClientBookKeeper) RemovePod(pod *kapi.Pod) { + client.Lock() + defer client.Unlock() + if _, ok := pod.Annotations[serviceKey]; !ok { + log.Println("Not the target, skip this Remove notification for pod:", pod.Name) + return + } + + if _, ok := client.pods[pod.Name]; !ok { + log.Printf("Pod:%s not exist. skip this REMOVE notification.", pod.Name) + return + } + //Perform All DNS Removes + client.msbQueue <- MSBWork{ + Action: MSBWorkRemovePod, + ServiceInfo: pod.Annotations[serviceKey], + IPAddress: pod.Status.PodIP, + } + delete(client.pods, pod.Name) + log.Println("Queued Pod to be removed: ", pod.Name) +} + +func (client *ClientBookKeeper) UpdatePod(pod *kapi.Pod) { + if _, ok := pod.Annotations[serviceKey]; !ok { + log.Println("Not the target, skip this Update notification for pod:", pod.Name) + return + } + + client.RemovePod(pod) + client.AddPod(pod) +} |