1.日志

lb配置

[root@lb ~]$ vim /etc/nginx/nginx.conf
# For more information on configuration, see:
# * Official English Documentation: http://nginx.org/en/docs/
# * Official Russian Documentation: http://nginx.org/ru/docs/

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

events {
worker_connections 1024;
}

stream {
log_format basic ‘$remote_addr [$time_local] ‘
‘$protocol $status $bytes_sent $bytes_received ‘
‘$session_time’;

access_log /var/log/nginx/4layer-nginx-access.log basic ;
}

检查语法
报错缺少这个模块

[root@lb ~]$ nginx -t
nginx: [emerg] unknown directive “stream” in /etc/nginx/nginx.conf:17
nginx: configuration file /etc/nginx/nginx.conf test failed

解决方案

[root@lb ~]$ yum -y install nginx-all-modules.noarch

重启

[root@lb ~]$ systemctl reload nginx.service

查看日志是否生效

[root@lb ~]$ ll /var/log/nginx/4layer-nginx-access.log
-rw-r–r– 1 root root 0 Sep 23 14:49 /var/log/nginx/4layer-nginx-access.log

2.ssh 负载均衡

lb配置

upstream ssh {
server 10.0.0.45:22;
server 10.0.0.145:22;
}
server {
listen 4561;
proxy_pass ssh;
}

测试

3.mysql负载均衡

lb配置

upstream mysql {
server 10.0.0.26:3306;
server 10.0.0.126:3306;
}
server {
listen 6606;
proxy_pass mysql;
}