更新时间:2024-08-15 GMT+08:00
通过Go客户端接入Elasticsearch集群
本文介绍通过Go语言访问CSS集群的配置说明。
准备工作
- CSS集群处于可用状态。
- 确保运行Go代码的服务器与CSS集群的网络是互通的。
- 确认服务器已安装Go,Go官网下载地址:https://go.dev/dl/。
连接非安全集群
连接非安全集群,示例代码如下:
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package main import ( "github.com/elastic/go-elasticsearch/v7" "log" ) func main() { cfg := elasticsearch.Config{ Addresses: []string{ "http://HOST:9200/", }, } es, _ := elasticsearch.NewClient(cfg) log.Println(es.Info()) } |
其中,HOST为集群节点的内网IP地址。
连接安全集群
- 连接未开启https的安全集群,示例如下:
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package main import ( "github.com/elastic/go-elasticsearch/v7" "log" ) func main() { cfg := elasticsearch.Config{ Addresses: []string{ "http://HOST:9200/", }, Username: "USERNAME", Password: "PASSWORD", } es, _ := elasticsearch.NewClient(cfg) log.Println(es.Info()) }
- 连接开启https的安全集群,不使用证书,示例代码如下:
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package main import ( "crypto/tls" "github.com/elastic/go-elasticsearch/v7" "log" "net/http" ) func main() { cfg := elasticsearch.Config{ Addresses: []string{ "https://HOST:9200/", }, Username: "USERNAME", Password: "PASSWORD", Transport: &http.Transport{ TLSClientConfig: &tls.Config{ InsecureSkipVerify: true, }, }, } es, _ := elasticsearch.NewClient(cfg) log.Println(es.Info()) }
- 连接开启https的安全集群,使用证书,示例代码如下:
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package main import ( "crypto/tls" "crypto/x509" "flag" "github.com/elastic/go-elasticsearch/v7" "io/ioutil" "log" "net" "net/http" "time" ) func main() { insecure := flag.Bool("insecure-ssl", false, "Accept/Ignore all server SSL certificates") flag.Parse() // Get the SystemCertPool, continue with an empty pool on error rootCAs, _ := x509.SystemCertPool() if rootCAs == nil { rootCAs = x509.NewCertPool() } // Read in the cert file certs, err := ioutil.ReadFile("/tmp/CloudSearchService.cer") if err != nil { log.Fatalf("Failed to append %q to RootCAs: %v", "xxx", err) } // Append our cert to the system pool if ok := rootCAs.AppendCertsFromPEM(certs); !ok { log.Println("No certs appended, using system certs only") } config := elasticsearch.Config{ Addresses: []string{ "https://HOST:9200/", }, Username: "USERNAME", Password: "PASSWORD", Transport: &http.Transport{ MaxIdleConnsPerHost: 10, ResponseHeaderTimeout: time.Second, DialContext: (&net.Dialer{ Timeout: 30 * time.Second, KeepAlive: 30 * time.Second, }).DialContext, TLSClientConfig: &tls.Config{ InsecureSkipVerify: *insecure, RootCAs: rootCAs, }, }, } es, _ := elasticsearch.NewClient(config) log.Println(elasticsearch.Version) log.Println(es.Info()) }
参数 |
描述 |
---|---|
HOST |
ES集群的访问地址,当存在多个IP地址时,中间用“,”隔开。 |
USERNAME |
访问集群的用户名。 |
PASSWORD |
用户名对应的密码。 |
运行代码
根据集群类型将以上适配的代码写入到“EsTest.gc”文件并存放到一个单独的目录,在该目录执行以下命令运行代码。
go env -w GO111MODULE=on go env -w GOPROXY=https://repo.huaweicloud.com/repository/goproxy/ go env -w GONOSUMDB=* go mod init test go mod tidy go run EsTest.go
父主题: 访问Elasticsearch集群