官方参考文档：

只有nginx1.9以上的版本才支持tcp负载均衡

配置必须出现在main段，不能配置在http,event和server标签段

（1）安装官方nginx

1.配置官方yum源

#vim /etc/yum.repos.d/nginx.repo [nginx]name=nginx repobaseurl=http://nginx.org/packages/mainline/centos/7/$basearch/gpgcheck=0enabled=1

yum makecacheyum repolist

2.安装nginx

yum install nginx -y systemctl start nginx systemctl enable nginx

（2）配置tcp负载均衡

#vim /etc/nginx/nginx.conf stream {        upstream ssh_proxy {                hash $remote_addr consistent;                               //一致性hash                server 192.9.191.31:22 max_fails=2 fail_timeout=2s;         //健康状态检测                server 192.9.191.32:22 max_fails=2 fail_timeout=2s;                }        server {                listen 2222;                proxy_connect_timeout 1s;                       //连接超时                proxy_timeout 20s;                              //连接超时时间，如果不配置，永远不超时                proxy_pass ssh_proxy;                       }}#systemctl reload nginx