forked from Qihoo360/wayne
/
client.go
218 lines (187 loc) · 5.86 KB
/
client.go
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package client
import (
"encoding/json"
"errors"
"sync"
"time"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
clientcmdlatest "k8s.io/client-go/tools/clientcmd/api/latest"
clientcmdapiv1 "k8s.io/client-go/tools/clientcmd/api/v1"
"github.com/Qihoo360/wayne/src/backend/models"
"github.com/Qihoo360/wayne/src/backend/util/logs"
"github.com/Qihoo360/wayne/src/backend/util/maps"
)
const (
// High enough QPS to fit all expected use cases.
defaultQPS = 1e6
// High enough Burst to fit all expected use cases.
defaultBurst = 1e6
// full resyc cache resource time
defaultResyncPeriod = 30 * time.Second
)
var (
ErrNotExist = errors.New("cluster not exist. ")
ErrMaintaining = errors.New("cluster being maintaining .please try again later. ")
)
var (
clusterManagerSets = &sync.Map{}
)
type ClusterManager struct {
Cluster *models.Cluster
// Deprecated: use KubeClient instead
Client *kubernetes.Clientset
// Deprecated: use KubeClient instead
CacheFactory *CacheFactory
Config *rest.Config
KubeClient ResourceHandler
}
func BuildApiserverClient() {
newClusters, err := models.ClusterModel.GetAllNormal()
if err != nil {
logs.Error("build apiserver client get all cluster error.", err)
return
}
changed := clusterChanged(newClusters)
if changed {
logs.Info("cluster changed, so resync info...")
shouldRemoveClusters(newClusters)
// build new clientManager
for i := 0; i < len(newClusters); i++ {
cluster := newClusters[i]
// deal with deleted cluster
if cluster.Master == "" {
logs.Warning("cluster's master is null:%s", cluster.Name)
continue
}
clientSet, config, err := buildClient(cluster.Master, cluster.KubeConfig)
if err != nil {
logs.Warning("build cluster (%s) client error :%v", cluster.Name, err)
continue
}
cacheFactory, err := buildCacheController(clientSet)
if err != nil {
logs.Warning("build cluster (%s) cache controller error :%v", cluster.Name, err)
continue
}
clusterManager := &ClusterManager{
Client: clientSet,
Config: config,
Cluster: &cluster,
CacheFactory: cacheFactory,
KubeClient: NewResourceHandler(clientSet, cacheFactory),
}
managerInterface, ok := clusterManagerSets.Load(cluster.Name)
if ok {
manager := managerInterface.(*ClusterManager)
manager.Close()
}
clusterManagerSets.Store(cluster.Name, clusterManager)
}
logs.Info("resync cluster finished! ")
}
}
// deal with deleted cluster
func shouldRemoveClusters(changedClusters []models.Cluster) {
changedClusterMap := make(map[string]struct{})
for _, cluster := range changedClusters {
changedClusterMap[cluster.Name] = struct{}{}
}
clusterManagerSets.Range(func(key, value interface{}) bool {
if _, ok := changedClusterMap[key.(string)]; !ok {
managerInterface, _ := clusterManagerSets.Load(key)
manager := managerInterface.(*ClusterManager)
manager.Close()
clusterManagerSets.Delete(key)
}
return true
})
}
func clusterChanged(clusters []models.Cluster) bool {
if maps.SyncMapLen(clusterManagerSets) != len(clusters) {
logs.Info("cluster length (%d) changed to (%d).", maps.SyncMapLen(clusterManagerSets), len(clusters))
return true
}
for _, cluster := range clusters {
managerInterface, ok := clusterManagerSets.Load(cluster.Name)
if !ok {
// maybe add new cluster
return true
}
manager := managerInterface.(*ClusterManager)
// master changed, the cluster is changed, ignore others
if manager.Cluster.Master != cluster.Master {
logs.Info("cluster master (%s) changed to (%s).", manager.Cluster.Master, cluster.Master)
return true
}
if manager.Cluster.Status != cluster.Status {
logs.Info("cluster status (%d) changed to (%d).", manager.Cluster.Status, cluster.Status)
return true
}
if manager.Cluster.KubeConfig != manager.Cluster.KubeConfig {
logs.Info("cluster kubeConfig (%d) changed to (%d).", manager.Cluster.KubeConfig, cluster.KubeConfig)
return true
}
}
return false
}
func Cluster(cluster string) (*models.Cluster, error) {
manager, err := Manager(cluster)
if err != nil {
return nil, err
}
return manager.Cluster, nil
}
func Client(cluster string) (*kubernetes.Clientset, error) {
manager, err := Manager(cluster)
if err != nil {
return nil, err
}
return manager.Client, nil
}
func Manager(cluster string) (*ClusterManager, error) {
managerInterface, exist := clusterManagerSets.Load(cluster)
// 如果不存在,则重新获取一次集群信息
if !exist {
BuildApiserverClient()
_, exist = clusterManagerSets.Load(cluster)
if !exist {
return nil, ErrNotExist
}
}
manager := managerInterface.(*ClusterManager)
if manager.Cluster.Status == models.ClusterStatusMaintaining {
return nil, ErrMaintaining
}
return manager, nil
}
func Managers() *sync.Map {
return clusterManagerSets
}
func buildClient(master string, kubeconfig string) (*kubernetes.Clientset, *rest.Config, error) {
configV1 := clientcmdapiv1.Config{}
err := json.Unmarshal([]byte(kubeconfig), &configV1)
if err != nil {
logs.Error("json unmarshal kubeconfig error. %v ", err)
return nil, nil, err
}
configObject, err := clientcmdlatest.Scheme.ConvertToVersion(&configV1, clientcmdapi.SchemeGroupVersion)
configInternal := configObject.(*clientcmdapi.Config)
clientConfig, err := clientcmd.NewDefaultClientConfig(*configInternal, &clientcmd.ConfigOverrides{
ClusterDefaults: clientcmdapi.Cluster{Server: master},
}).ClientConfig()
if err != nil {
logs.Error("build client config error. %v ", err)
return nil, nil, err
}
clientConfig.QPS = defaultQPS
clientConfig.Burst = defaultBurst
clientSet, err := kubernetes.NewForConfig(clientConfig)
if err != nil {
logs.Error("(%s) kubernetes.NewForConfig(%v) error.%v", master, err, clientConfig)
return nil, nil, err
}
return clientSet, clientConfig, nil
}