add kubectl/kubeconfig/quota/terminal api, but quota api is tempoary, will be changed as soon

pkg/client/etcdclient.go

@@ -0,0 +1,130 @@
+/*
+Copyright 2018 The KubeSphere 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 client
+
+import (
+	"github.com/coreos/etcd/clientv3"
+	"github.com/coreos/etcd/pkg/transport"
+
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/coreos/etcd/etcdserver/api/v3rpc/rpctypes"
+	"github.com/golang/glog"
+
+	"kubesphere.io/kubesphere/pkg/options"
+)
+
+type EtcdClient struct {
+	cli *clientv3.Client
+}
+
+func (cli EtcdClient) Put(key, value string) error {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Duration(10)*time.Second)
+	_, err := cli.cli.Put(ctx, key, value)
+	cancel()
+	if err != nil {
+		switch err {
+		case context.Canceled:
+			glog.Errorf("ctx is canceled by another routine: %v\n", err)
+		case context.DeadlineExceeded:
+			glog.Errorf("ctx is attached with a deadline is exceeded: %v\n", err)
+		case rpctypes.ErrEmptyKey:
+			glog.Errorf("client-side error: %v\n", err)
+		default:
+			glog.Errorf("bad cluster endpoints, which are not etcd servers: %v\n", err)
+		}
+		return err
+	}
+
+	return nil
+}
+
+func (cli EtcdClient) Get(key string) ([]byte, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Duration(10)*time.Second)
+	resp, err := cli.cli.Get(ctx, key)
+	cancel()
+	if err != nil {
+		glog.Error(err)
+		return nil, err
+	}
+
+	if len(resp.Kvs) == 0 {
+		return nil, fmt.Errorf("empty value of key: %s", key)
+	}
+	return resp.Kvs[0].Value, nil
+}
+
+func (cli EtcdClient) Close() {
+
+	cli.cli.Close()
+}
+
+func newEtcdClientWithHttps(certFile, keyFile, caFile string, endpoints []string, dialTimeout int) (*clientv3.Client, error) {
+	tlsInfo := transport.TLSInfo{
+		CertFile:      certFile,
+		KeyFile:       keyFile,
+		TrustedCAFile: caFile,
+	}
+	tlsConfig, err := tlsInfo.ClientConfig()
+	if err != nil {
+		glog.Errorln(err)
+		return nil, err
+	}
+
+	cli, err := clientv3.New(clientv3.Config{
+		Endpoints:   endpoints,
+		DialTimeout: time.Duration(dialTimeout) * time.Second,
+		TLS:         tlsConfig,
+	})
+	if err != nil {
+		glog.Errorln(err)
+		return nil, err
+	}
+	return cli, nil // make sure to close the client
+}
+
+func newEtcdClient(endpoints []string, dialTimeout int) (*clientv3.Client, error) {
+	cli, err := clientv3.New(clientv3.Config{
+		Endpoints:   endpoints,
+		DialTimeout: time.Duration(dialTimeout) * time.Second,
+	})
+	if err != nil {
+		glog.Errorln(err)
+		return nil, err
+	}
+	return cli, nil // make sure to close the client
+}
+
+func NewEtcdClient() (*EtcdClient, error) {
+	var cli *clientv3.Client
+	var err error
+	cert := options.ServerOptions.GetEtcdCertFile()
+	key := options.ServerOptions.GetEtcdKeyFile()
+	ca := options.ServerOptions.GetEtcdCaFile()
+	endpoints := options.ServerOptions.GetEtcdEndPoints()
+	if len(cert) > 0 && len(key) > 0 && len(ca) > 0 {
+		cli, err = newEtcdClientWithHttps(cert, key, ca, endpoints, 20)
+	} else {
+		cli, err = newEtcdClient(endpoints, 20)
+	}
+	if err != nil {
+		return nil, err
+	}
+	return &EtcdClient{cli}, nil
+}