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package gojobs
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import (
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"context"
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"errors"
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"go.etcd.io/etcd/api/v3/mvccpb"
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"go.etcd.io/etcd/client/v3"
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"strings"
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)
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// NewEtcdServer 创建 etcd server
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func NewEtcdServer(config *EtcdConfig) (*Etcd, error) {
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var (
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e = &Etcd{}
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err error
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)
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e.Endpoints = config.Endpoints
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e.DialTimeout = config.DialTimeout
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e.LocalIP = config.LocalIP
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e.Username = config.Username
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e.Password = config.Password
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e.CustomDirectory = config.CustomDirectory
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e.Debug = config.Debug
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v3Config := clientv3.Config{
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Endpoints: e.Endpoints,
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DialTimeout: e.DialTimeout,
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}
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// 判断有没有配置用户信息
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if e.Username != "" {
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v3Config.Username = e.Username
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v3Config.Password = e.Password
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}
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e.Client, err = clientv3.New(v3Config)
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if err != nil {
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return nil, errors.New("连接失败：" + err.Error())
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}
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// kv API子集
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e.Kv = clientv3.NewKV(e.Client)
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// 创建一个lease（租约）对象
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e.Lease = clientv3.NewLease(e.Client)
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return e, nil
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}
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// ListWorkers 获取在线worker列表
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func (e Etcd) ListWorkers() (workerArr []string, err error) {
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var (
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getResp *clientv3.GetResponse
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kv *mvccpb.KeyValue
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workerIP string
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)
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// 初始化数组
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workerArr = make([]string, 0)
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// 获取目录下所有Kv
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getResp, err = e.Kv.Get(context.TODO(), getJobWorkerDir(e), clientv3.WithPrefix())
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if err != nil {
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return workerArr, err
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}
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// 解析每个节点的IP
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for _, kv = range getResp.Kvs {
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// kv.Key : /cron/workers/192.168.2.1
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workerIP = e.ExtractWorkerIP(string(kv.Key))
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workerArr = append(workerArr, workerIP)
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}
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return workerArr, err
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}
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// ExtractWorkerIP 提取worker的IP
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func (e Etcd) ExtractWorkerIP(regKey string) string {
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return strings.TrimPrefix(regKey, getJobWorkerDir(e))
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}
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