Nginx配置TCP转发+http转发+keepalived高可用

Nginx配置TCP请求转发+http请求转发+keepalived高可用
http://nginx.org/download/
1.TCP请求转发基于stream在1.9版本前，需要单独编译安装该组建:

依赖服务

[root@baolin conf]#yum -y install pcre-devel openssl openssl-devel library

wget http://nginx.org/download/nginx-1.9.5.tar.gz
tar -xf nginx-1.9.5.tar.gz -C /usr/local/
cd /usr/local/nginx-1.9.5/

编译安装 stream 组建

./configure --prefix=/usr/local/nginx/ --with-http_stub_status_module --with-http_ssl_module --with-stream --with-stream_ssl_module
make && make install
vim /etc/profile.d/nginx.sh
export PATH=/usr/local/nginx/sbin:$PATH
source /etc/profile.d/nginx.sh
nginx 启动。

2、创建conf文件存放目录：
mkdir /usr/local/nginx/conf/conf.d/

3、配置
01、nginx.conf
vim /usr/local/nginx/conf/nginx.conf
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /usr/local/nginx/logs/nginx.pid;
include /usr/local/nginx/conf/conf.d/.conf;
events {
worker_connections 25600; #最大连接数
use epoll; #指明并发连接请求的处理方法
accept_mutex on; #处理新的连接请求的方法;on意味着由worker轮流处理新请求，
#并发总数是 worker_processes 和 worker_connections 的乘积
#即 max_clients = worker_processes worker_connections
#在设置了反向代理的情况下，max_clients = worker_processes worker_connections / 4 为什么
#为什么上面反向代理要除以4，应该说是一个经验值
#根据以上条件，正常情况下的Nginx Server可以应付的最大连接数为：4 8000 = 32000
#worker_connections 值的设置跟物理内存大小有关
#因为并发受IO约束，max_clients的值须小于系统可以打开的最大文件数
#而系统可以打开的最大文件数和内存大小成正比，一般1GB内存的机器上可以打开的文件数大约是10万左右
#我们来看看360M内存的VPS可以打开的文件句柄数是多少：
#$ cat /proc/sys/fs/file-max
#输出 34336
#32000 < 34336，即并发连接总数小于系统可以打开的文件句柄总数，这样就在操作系统可以承受的范围之内
#所以，worker_connections 的值需根据 worker_processes 进程数目和系统可以打开的最大文件总数进行适当地进行设置
#使得并发总数小于操作系统可以打开的最大文件数目
#其实质也就是根据主机的物理CPU和内存进行配置
#当然，理论上的并发总数可能会和实际有所偏差，因为主机还有其他的工作进程需要消耗系统资源。

ulimit -SHn 65535;

        }
    02、vim /usr/local/nginx/conf/conf.d/yewu.conf
        http {
            log_format  main  ' "$http_x_forwarded_for" | [$time_local] | $host |  $remote_addr |  $request | $request_time |  $body_bytes_sent  |  $status |'  
                                        '| $upstream_addr | $upstream_response_time  |  $upstream_status  |'  
                                        ' "$http_referer"  | "$http_user_agent" '; 
            access_log  /var/log/nginx/access.log  main;
            charset utf-8;
            sendfile            on;
            tcp_nopush          on;
            tcp_nodelay         on;
            keepalive_timeout   65;
            types_hash_max_size 2048;

            default_type        application/octet-stream;

            server {
                listen 80;
                root /data/nginx;
                index index.html index.htm *.html index.jsp;
                location ^~ /configCenter-vals/ {
                    proxy_pass http://192.168.1.141:8080;
                    proxy_set_header Host $host;
                    proxy_set_header X-Real-IP $remote_addr;
                    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                    proxy_set_header Via "nginx";
                }
                location ^~ /configCenter/ {
                    proxy_pass http://192.168.1.139:8082;
                    proxy_set_header Host $host;
                    proxy_set_header X-Real-IP $remote_addr;
                    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                    proxy_set_header Via "nginx";
                }

                location ^~ /dubbo_admin/ {
                    proxy_pass http://192.168.1.139:8082;
                    proxy_set_header Host $host;
                    proxy_set_header X-Real-IP $remote_addr;
                    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                    proxy_set_header Via "nginx";
                }
                location ^~ /appserver/ {
                    proxy_pass http://192.168.1.160:8080;
                    proxy_set_header Host $host;
                    proxy_set_header X-Real-IP $remote_addr;
                    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                    proxy_set_header Via "nginx";
                }
                location ^~ /asserver/ {
                    proxy_pass http://192.168.1.161:8080;
                    proxy_set_header Host $host;
                    proxy_set_header X-Real-IP $remote_addr;
                    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                    proxy_set_header Via "nginx";
                }
                location ^~ /idsoserver/ {
                    proxy_pass http://192.168.1.161:8080;
                    proxy_set_header Host $host;
                    proxy_set_header X-Real-IP $remote_addr;
                    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                    proxy_set_header Via "nginx";
                }

                location ^~ /vals-ap/ {
                    proxy_pass http://192.168.1.142:8080;
                    proxy_set_header Host $host;
                    proxy_set_header X-Real-IP $remote_addr;
                    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                    proxy_set_header Via "nginx";
                }

                location ^~ /eidboss/ {
                    proxy_pass https://192.168.1.145:8080;
                    proxy_set_header Host $host;
                    proxy_set_header X-Real-IP $remote_addr;
                    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                    proxy_set_header Via "nginx";
                }
                location ^~ /asboss/ {
                    proxy_pass http://192.168.1.145:8081;
                    proxy_set_header Host $host;
                    proxy_set_header X-Real-IP $remote_addr;
                    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                    proxy_set_header Via "nginx";
                }
            }
        }

    03、vim /usr/local/nginx/conf/conf.d/eid.conf
        stream {
            upstream eid_device {
                server 192.168.1.12:8008 max_fails=1 fail_timeout=1s weight=1;
                server 192.168.1.12:8008 max_fails=1 fail_timeout=1s weight=1;
            }
            server {
                listen  8008;
                proxy_pass  eid_device;
            }
        }

4、keepalived高可用配置
01、master配置
vim /etc/keepalived/keepalived.conf
global_defs {
notification_email {br/>[email protected]
}

       notification_email_from [email protected]
       smtp_server smtp.exmail.qq.com
       smtp_connect_timeout 30
       router_id nginx-master
    }

    vrrp_script chk_httpd {
         script "/etc/keepalived/check_and_start_httpd.sh"
         interval 2
         weight -10
             fall 3
             rise 2
    }

    vrrp_instance VI_1 {
        nopreempt
        state MASTER
        interface eth1
        virtual_router_id 66
        priority 100
        advert_int 1
        authentication {
            auth_type PASS
            auth_pass 1111
        }
        virtual_ipaddress {
            192.168.1.8/32 dev eth1 label eth1:0
            192.168.1.9/32 dev eth1 label eth1:1
        }
    track_script {                # 引用VRRP脚本，即在 vrrp_script 部分指定的名字。定期运行它们来改变优先级，并最终引发主备切换。
        chk_httpd
        }                
    }

02、backup配置
    vim /etc/keepalived/keepalived.conf
    global_defs {
       notification_email {
                [email protected]
       }

       notification_email_from [email protected]
       smtp_server smtp.exmail.qq.com
       smtp_connect_timeout 30
       router_id nginx-backup
    }

    vrrp_script chk_httpd {
         script "/etc/keepalived/check_and_start_httpd.sh"
         interval 2
         weight -10
             fall 3
             rise 2
    }

    vrrp_instance VI_1 {
    #    nopreempt
        state BACKUP
        interface eth1
        virtual_router_id 66
        priority 95
        advert_int 1
        authentication {
            auth_type PASS
            auth_pass 1111
        }
        virtual_ipaddress {
            192.168.1.8/32 dev eth1 label eth1:0
            192.168.1.9/32 dev eth1 label eth1:1
        }
    track_script {                # 引用VRRP脚本，即在 vrrp_script 部分指定的名字。定期运行它们来改变优先级，并最终引发主备切换。
        chk_httpd
        }                
    }

03、脚本：vim /etc/keepalived/check_and_start_httpd.sh
    #!/bin/bash
    counter=$(ps -C nginx --no-heading|wc -l)
    if [ "${counter}" = "0" ]; then
        ps -ef | grep nginx | grep -v grep | awk '{print $2}'  | sed -e "s/^/kill -9 /g" | sh -   #/usr/local/bin/nginx  此为nginx启动方式。
        nginx
        sleep 2
        counter=$(ps -C nginx --no-heading|wc -l)   
        if [ "${counter}" = "0" ]; then
        systemctl stop keepalived
        echo -e "$ip of nginx is stop ,nginx service switch nginx slave  \nlocal is virtual ip :   $virtual_ip    not exist " |mail -s "$ip of nginx is stop" [email protected]
        fi
    fi
04、邮箱配置：
    yum -y install mailx
    yum install -y sendmail
    yum install -y sendmail-cf
    yum -y install bc
    echo "TRUST_AUTH_MECH('EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl" >> /etc/mail/sendmail.mc
    echo "define('confAUTH_MECHANISMS', 'EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl" >> /etc/mail/sendmail.mc
    sed -i s#127.0.0.1#0.0.0.0#g /etc/mail/sendmail.mc
    grep "OPTIONS" /etc/mail/sendmail.mc
    m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf
    echo 'set [email protected]' >> /etc/mail.rc
    echo 'set smtp=smtp.exmail.qq.com' >> /etc/mail.rc
    echo 'set [email protected]' >> /etc/mail.rc
    echo 'set smtp-auth-password=xxxx' >> /etc/mail.rc
    echo 'set smtp-auth=login' >> /etc/mail.rc
    IP1=$(ifconfig|grep '192.168'|awk '{print $2}')
    IP2=$(ifconfig|grep '10.10'|awk '{print $2}')
    abc="abc.mail.com"
    echo "$IP2 `hostname` $abc" >> /etc/hosts
    systemctl enable sendmail
    systemctl start sendmail
    systemctl status sendmail