Allen's blog

Go获取服务器ip

排查负载均衡服务器中某个IP指定的服务出现故障

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package main

import (
    "log"
    "net/http"
    "net/http/httptrace"
)

func main() {
    req, err := http.NewRequest("GET", "https://example.com/", nil)
    if err != nil {
        log.Fatal(err)
    }

    trace := &httptrace.ClientTrace{
        GotConn: func(connInfo httptrace.GotConnInfo) {
            log.Printf("resolved to: %s", connInfo.Conn.RemoteAddr())
        },
    }

    req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))

    client := &http.Client{}
    _, err := client.Do(req)
    if err != nil {
        log.Fatal(err)
    }
}
Go