golang：ssh：握手失败：EOF

我写了一个go项目来部署在线代码.我需要远程机器并运行一些start reload like命令.

我有200台机器,所以我使用常规来完成这项工作.

问题有时是ssh失败抛出ssh：握手失败：EOF或ssh：握手失败：读取tcp 10.19.177.216:44721-\u0026gt;10.19.139.36:22：读取：连接由peer重置为什么？

我的核心代码：

func RunRemoteCmd(selfDesc String,host String,cmd String,ch chan<- RunResult) {
    startTime := time.Now()
    sshConfig := &ssh.ClientConfig{
        User: "root",Auth: []ssh.AuthMethod{
            publicKey,},HostKeyCallBACk: func(hostname String,remote net.Addr,key ssh.PublicKey) error {
            return nil
        },}

    addr := fmt.Sprintf("%s:22",host)
    connection,err := ssh.Dial("tcp",addr,sshConfig)
    if err != nil {
        ch <- RunResult{selfDesc,err.Error(),"",time.Since(startTimE)}
        return
    }

    session,err := connection.NewSession()
    if err != nil {
        ch <- RunResult{selfDesc,time.Since(startTimE)}
        return
    }
    defer session.Close()

    var out bytes.buffer
    session.Stdout = &out

    session.Run(cmd)
    ch <- RunResult{selfDesc,out.String(),time.Since(startTimE)}
}