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