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package main
import (
"fmt"
"github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/common"
"github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/common/profile"
dnspod "github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/dnspod/v20210323"
"go.uber.org/zap"
networkingv1 "k8s.io/api/networking/v1"
"k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/clientcmd"
"os"
)
var (
logger *zap.Logger
version string
policy string
domain string
secretId string
secretKey string
recordValue string
dnsPodClient *dnspod.Client
clientSet *kubernetes.Clientset
)
func initLogger() {
logger, _ = zap.NewDevelopment()
defer func(logger *zap.Logger) {
err := logger.Sync()
if err != nil {
fmt.Println("Logger sync error: ", err)
}
}(logger)
}
func initCheck() {
version = os.Getenv("VERSION")
if version == "" {
version = "2021-03-23"
}
policy = os.Getenv("POLICY")
if policy == "" {
policy = "retain"
}
domain = os.Getenv("DOMAIN")
if domain == "" {
logger.Error("Please set the environment variable `DOMAIN`")
os.Exit(1)
}
secretId = os.Getenv("TENCENT_SECRET_ID")
secretKey = os.Getenv("TENCENT_SECRET_KEY")
if secretId == "" || secretKey == "" {
logger.Error("Please set the environment variables `TENCENT_SECRET_ID` and `TENCENT_SECRET_KEY`")
os.Exit(1)
}
recordValue = os.Getenv("RECORD_VALUE")
if recordValue == "" {
logger.Error("Please set the environment variable `RECORD_VALUE`")
os.Exit(1)
}
logger.Info("---------------------------------")
logger.Info("Version" + ": " + version)
logger.Info("Policy" + ": " + policy)
logger.Info("Domain" + ": " + domain)
logger.Info("SecretId" + ": " + secretId)
logger.Info("SecretKey: *****")
logger.Info("RecordValue" + ": " + recordValue)
logger.Info("---------------------------------")
}
func getRecordDict() map[string]uint64 {
recordDict := make(map[string]uint64)
request := dnspod.NewDescribeRecordListRequest()
request.Domain = common.StringPtr(domain)
request.RecordType = common.StringPtr("A")
request.Offset = common.Uint64Ptr(0)
request.Limit = common.Uint64Ptr(10)
// 返回的 response 是一个 DescribeRecordListResponse 的实例，与请求对象对应
response, err := dnsPodClient.DescribeRecordList(request)
if err != nil {
logger.Panic(err.Error())
}
for i := 0; i < len(response.Response.RecordList); i++ {
recordDict[*response.Response.RecordList[i].Name] = *response.Response.RecordList[i].RecordId
}
domainCount := *response.Response.RecordCountInfo.ListCount
domainTotal := *response.Response.RecordCountInfo.TotalCount
for domainCount < domainTotal {
request.Offset = common.Uint64Ptr(domainCount)
response, err = dnsPodClient.DescribeRecordList(request)
if err != nil {
logger.Panic(err.Error())
}
for i := 0; i < len(response.Response.RecordList); i++ {
recordDict[*response.Response.RecordList[i].Name] = *response.Response.RecordList[i].RecordId
}
domainCount += *response.Response.RecordCountInfo.ListCount
}
logger.Info("RecordDict: ", zap.Any("RecordDict", recordDict))
return recordDict
}
func createRecord(subDomain string) {
request := dnspod.NewCreateRecordRequest()
request.Domain = common.StringPtr(domain)
request.SubDomain = common.StringPtr(subDomain)
request.RecordType = common.StringPtr("A")
request.RecordLine = common.StringPtr("默认")
request.Value = common.StringPtr(recordValue)
_, err := dnsPodClient.CreateRecord(request)
if err != nil {
logger.Panic(err.Error())
}
}
func updateRecord(recordId uint64, subDomain string) {
request := dnspod.NewModifyRecordRequest()
request.Domain = common.StringPtr(domain)
request.RecordId = common.Uint64Ptr(recordId)
request.SubDomain = common.StringPtr(subDomain)
request.RecordType = common.StringPtr("A")
request.RecordLine = common.StringPtr("默认")
request.Value = common.StringPtr(recordValue)
_, err := dnsPodClient.ModifyRecord(request)
if err != nil {
logger.Panic(err.Error())
}
}
func deleteRecord(recordId uint64) {
request := dnspod.NewDeleteRecordRequest()
request.Domain = common.StringPtr(domain)
request.RecordId = common.Uint64Ptr(recordId)
_, err := dnsPodClient.DeleteRecord(request)
if err != nil {
logger.Panic(err.Error())
}
}
func addHandler(obj interface{}) {
logger.Info("Detect Ingress Add Event")
recordDict := getRecordDict()
addIngress := obj.(*networkingv1.Ingress)
for i := 0; i < len(addIngress.Spec.Rules); i++ {
customDomain := addIngress.Spec.Rules[i].Host
// customDomain 判断是否以 domain 结尾
if customDomain[len(customDomain)-len(domain):] != domain {
continue
}
subDomain := customDomain[:len(customDomain)-len(domain)-1]
if _, ok := recordDict[subDomain]; !ok {
createRecord(subDomain)
} else {
if policy == "update" {
updateRecord(recordDict[subDomain], subDomain)
}
}
}
}
func updateHandler(oldObj, newObj interface{}) {
logger.Info("Detect Ingress Update Event")
recordDict := getRecordDict()
newIngress := newObj.(*networkingv1.Ingress)
for i := 0; i < len(newIngress.Spec.Rules); i++ {
customDomain := newIngress.Spec.Rules[i].Host
// customDomain 判断是否以 domain 结尾
if customDomain[len(customDomain)-len(domain):] != domain {
continue
}
subDomain := customDomain[:len(customDomain)-len(domain)-1]
if _, ok := recordDict[subDomain]; !ok {
createRecord(subDomain)
} else {
updateRecord(recordDict[subDomain], subDomain)
}
}
}
func deleteHandler(obj interface{}) {
logger.Info("Detect Ingress Delete Event")
recordDict := getRecordDict()
deleteIngress := obj.(*networkingv1.Ingress)
for i := 0; i < len(deleteIngress.Spec.Rules); i++ {
customDomain := deleteIngress.Spec.Rules[i].Host
// customDomain 判断是否以 domain 结尾
if customDomain[len(customDomain)-len(domain):] != domain {
continue
}
subDomain := customDomain[:len(customDomain)-len(domain)-1]
if _, ok := recordDict[subDomain]; ok {
deleteRecord(recordDict[subDomain])
}
}
}
func k8sInformer() {
// 创建共享 Informer 工厂
factory := informers.NewSharedInformerFactory(clientSet, 0)
// 获取 Informer Ingress watcher
ingressInformer := factory.Networking().V1().Ingresses().Informer()
// 添加事件处理器来监听 Ingress 资源的变化
_, err := ingressInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: addHandler,
UpdateFunc: updateHandler,
DeleteFunc: deleteHandler,
})
if err != nil {
return
}
// 启动 informer 并等待缓存同步
stopCh := make(chan struct{})
defer close(stopCh)
factory.Start(stopCh)
factory.WaitForCacheSync(stopCh)
// 阻塞，持续监听事件
<-stopCh
}
func main() {
// 初始化
initLogger()
initCheck()
// 创建 DNSPod 客户端
credential := common.NewCredential(secretId, secretKey)
cpf := profile.NewClientProfile()
cpf.HttpProfile.Endpoint = "dnspod.tencentcloudapi.com"
dnsPodClient, _ = dnspod.NewClient(credential, "", cpf)
// 创建 Kubernetes 客户端
var config *rest.Config
var err error
// 判断是否在集群内部
if os.Getenv("KUBERNETES_SERVICE_HOST") != "" {
config, err = rest.InClusterConfig()
if err != nil {
logger.Panic(err.Error())
}
} else {
if _, err = os.Stat("./.kube/config"); os.IsNotExist(err) {
logger.Panic("Please set the kubeconfig file")
}
config, err = clientcmd.BuildConfigFromFlags("", "./.kube/config")
}
clientSet, err = kubernetes.NewForConfig(config)
if err != nil {
logger.Panic(err.Error())
}
k8sInformer()
}
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