package esutil
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"github.com/spf13/viper"
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"io/ioutil"
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"net/http"
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"os/exec"
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"strings"
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"time"
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)
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//初始化配置文件
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func InitYml(configPath string) (bool, error) {
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v := viper.New()
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v.SetConfigType("yml")
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v.SetConfigName("elasticsearch")
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v.AddConfigPath(configPath)
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err := v.ReadInConfig()
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if err != nil {
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return false, err
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}
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if err := v.WriteConfig(); err != nil {
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return false, err
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}
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return true, nil
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}
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//初始化索引
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func InitIndex(indexPath string) (bool) {
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resultMsg := CMDSC("sh " + indexPath + "/indexInit.sh")
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if resultMsg == "运行失败" {
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return false
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}
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return true
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}
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//启动服务
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func StartServer(binPath string, ip string, port string) bool {
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resultMsg := CMDSC("sh " + binPath + "/es_start.sh")
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if resultMsg == "运行失败" {
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return false
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}
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return true
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}
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//关闭服务
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func StopServer(binPath string, ip string, port string) bool {
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b := VerifyShortNodeServer(ip, port)
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if b == true {
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resultMsg := CMDSC("sh " + binPath + "/es_stop.sh")
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if resultMsg == "运行失败" {
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return true
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}
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time.Sleep(time.Second * 3)
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}
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bs := VerifyShortNodeServer(ip, port)
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return bs
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}
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//更换节点角色
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func UpdateNodeRole(configPath string, role string) (bool, error) {
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v := viper.New()
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v.SetConfigType("yml")
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v.SetConfigName("elasticsearch")
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v.AddConfigPath(configPath)
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err := v.ReadInConfig()
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if err != nil {
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return false, err
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}
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if role == "master" {
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v.Set("node.master", true)
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} else if role == "slave" {
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v.Set("node.master", false)
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}
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if err := v.WriteConfig(); err != nil {
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return false, err
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}
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return true, nil
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}
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//验证该节点是否被使用过
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func VerifyCreated(configPath string) (bool, error) {
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v := viper.New()
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v.SetConfigType("yml")
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v.SetConfigName("elasticsearch")
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v.AddConfigPath(configPath)
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err := v.ReadInConfig()
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if err != nil {
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return true, err
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}
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hosts := v.GetStringSlice("discovery.zen.ping.unicast.hosts")
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if len(hosts) > 1 {
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return true, errors.New("该节点已经被使用")
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}
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return false, nil
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}
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//验证节点服务是否正常启动
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func VerifyNodeServer(ip string, port string, waitTime int) bool {
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b := false
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url := "http://" + ip + ":" + port
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for i := 1; i < 3; i++ {
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_, err := HttpRC("GET", url, nil)
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if err != nil {
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b = false
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if i < 3 {
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time.Sleep(time.Second * time.Duration(waitTime))
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continue
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}
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} else {
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b = true
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break
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}
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}
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return b
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}
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//验证节点服务是否正常启动(短验证)
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func VerifyShortNodeServer(ip string, port string) bool {
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url := "http://" + ip + ":" + port
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_, err := HttpRC("GET", url, nil)
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if err != nil {
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return false
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}
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return true
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}
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//验证节点角色
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func VerifyNodeRole(configPath string, ) (string, error) {
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role := "slave"
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v := viper.New()
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v.SetConfigType("yml")
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v.SetConfigName("elasticsearch")
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v.AddConfigPath(configPath)
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err := v.ReadInConfig()
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if err != nil {
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return role, err
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}
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flag := v.GetBool("node.master")
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if flag == true {
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role = "master"
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}
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return role, nil
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}
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//查询组播列表
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func GetDiscoveryZenPingUnicastHosts(configPath string) ([]string, error) {
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v := viper.New()
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v.SetConfigType("yml")
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v.SetConfigName("elasticsearch")
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v.AddConfigPath(configPath)
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err := v.ReadInConfig()
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if err != nil {
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return nil, err
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}
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hosts := v.GetStringSlice("discovery.zen.ping.unicast.hosts")
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return hosts, nil
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}
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//设置组播列表
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func SetDiscoveryZenPingUnicastHosts(configPath string, hosts []string) (bool, error) {
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v := viper.New()
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v.SetConfigType("yml")
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v.SetConfigName("elasticsearch")
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v.AddConfigPath(configPath)
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err := v.ReadInConfig()
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if err != nil {
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return false, err
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}
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v.Set("discovery.zen.ping.unicast.hosts", hosts)
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if err := v.WriteConfig(); err != nil {
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return false, err
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}
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return true, nil
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}
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//更新组播列表
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func UpdateDiscoveryZenPingUnicastHosts(configPath string, oldIp string, newIp string) (bool, error) {
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v := viper.New()
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v.SetConfigType("yml")
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v.SetConfigName("elasticsearch")
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v.AddConfigPath(configPath)
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err := v.ReadInConfig()
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if err != nil {
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return false, err
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}
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flag := false
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hosts := v.GetStringSlice("discovery.zen.ping.unicast.hosts")
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for i, pick := range hosts {
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if pick == oldIp {
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hosts[i] = newIp
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flag = true
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}
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}
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if flag == false {
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fmt.Println("要修改的ip不在列表中")
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}
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v.Set("discovery.zen.ping.unicast.hosts", hosts)
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if err := v.WriteConfig(); err != nil {
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return false, err
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}
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return true, nil
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}
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//添加组播成员
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func AddDiscoveryZenPingUnicastHosts(configPath string, ip string) (bool, error) {
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v := viper.New()
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v.SetConfigType("yml")
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v.SetConfigName("elasticsearch")
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v.AddConfigPath(configPath)
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errR := v.ReadInConfig()
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if errR != nil {
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return false, errR
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}
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hosts := v.GetStringSlice("discovery.zen.ping.unicast.hosts")
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hosts = append(hosts, ip)
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v.Set("discovery.zen.ping.unicast.hosts", hosts)
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if errW := v.WriteConfig(); errW != nil {
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return false, errW
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}
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return true, nil
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}
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type NodeInfo struct {
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NodeIp string `json:"nodeIp"`
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NodeRole string `json:"nodeRole"`
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NodeMaster bool `json:"nodeMaster"`
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NodeName string `json:"nodeName"`
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}
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//查询集群信息
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func GetClusterInfo(ip string, port string) ([]NodeInfo, error) {
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url := "http://" + ip + ":" + port + "/_cat/nodes?v"
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buf, err := HttpRC("GET", url, nil)
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if err != nil {
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return nil, err
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}
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var inf = []NodeInfo{}
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res := strings.Split(string(buf), "\n")[1:]
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for _, r := range res {
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if r != "" {
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inx := strings.Fields(r)
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ip := inx[0]
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role := "slave"
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if find := strings.Contains(inx[7], "m"); find {
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role = "master"
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}
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master := false
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if find := strings.Contains(inx[8], "*"); find {
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master = true
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}
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name := inx[9]
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inf = append(inf, NodeInfo{
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NodeName: name,
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NodeRole: role,
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NodeIp: ip,
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NodeMaster: master,
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})
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}
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}
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return inf, nil
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}
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//排除即将退出集群的节点
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func ExcludeNode(ip string, port string) (bool, error) {
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flag := false
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url := "http://" + ip + ":" + port + "/_cluster/settings"
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body := `{
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"transient":{
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"cluster.routing.allocation.exclude._ip":"` + ip + `"
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}
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}`
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buf, err := HttpRC("PUT", url, []byte(body))
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if err != nil {
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return false, err
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}
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var inf map[string]interface{}
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json.Unmarshal(buf, &inf)
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if inf["acknowledged"] != nil {
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flag = inf["acknowledged"].(bool)
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}
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return flag, nil
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}
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func CMDSC(scriptStr string) string {
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cmd := exec.Command("sh", "-c", scriptStr)
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var out bytes.Buffer
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cmd.Stdout = &out
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err := cmd.Run()
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if err != nil {
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return "运行失败"
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}
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return out.String()
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}
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func HttpRC(method string, url string, parama []byte) (buf []byte, err error) {
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timeout := time.Duration(10 * time.Second)
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client := http.Client{
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Timeout: timeout,
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}
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request, err := http.NewRequest(method, url, bytes.NewBuffer(parama))
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request.Header.Set("Content-type", "application/json")
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if err != nil {
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fmt.Println("build request fail !")
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return nil, err
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}
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resp, err := client.Do(request)
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if err != nil {
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fmt.Println("request error: ", err)
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return nil, err
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}
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defer resp.Body.Close()
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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fmt.Println(err)
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return nil, err
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}
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return body, nil
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}
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