部署系统:

Red Hat Enterprise Linux Server release 7.0

软件版本:apache-tomcat-7.0.92.tar.gz
keepalived-2.0.11.tar.gz
 nginx-1.15.7.tar.gz  (openssl-1.1.1.tar.gz   pcre-8.40.tar.gz  zlib-1.2.11.tar.gz )

架构图

vip:192.168.56.80-----> A:192.168.56.129      nginx(8001)   tomcat (8080)

B:192.168.56.130     nginx(8001)    tomcat (8080)

开始部署

1、准备两台虚拟机,网络我选择的是nat,如下图.  这种网络有点麻烦后面需要做一下映射。

在vmware 编辑下虚拟网络编辑器,选择NAT设置

这样通过本机IP访问这此端口了.

服务器上网络准备如下:

[root@mrice_02 sbin]# cat /etc/sysconfig/network-scripts/ifcfg-eno16777736
TYPE=Ethernet
BOOTPROTO=static
DEFROUTE=yes
NAME=eno16777736
ONBOOT=yes
IPADDR0=192.168.56.130
PREFIX0=32
GATEWAY0=192.168.56.2
HWADDR=00:0c:29:b9:46:b5
PEERDNS=yes

2、服务器准备完毕后,开始安装软件.

tomcat 不用说了,解压后,编写一个默认页面.

nginx 安装   请参考https://www.cnblogs.com/mrice/p/9882781.html

nginx.conf 配置文件如下  ,nginx配置可简单也可复杂,可根据生产中进行配置.

#user  nobody;
worker_processes ; #error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info; #pid logs/nginx.pid; events {
worker_connections ;
} http {
include mime.types;
default_type application/octet-stream; #log_format main '$remote_addr - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"'; #access_log logs/access.log main; sendfile on;
#tcp_nopush on; #keepalive_timeout ;
keepalive_timeout ; #gzip on; upstream mrice{
server 192.168.56.129: weight=;
server 192.168.56.130: weight=;
} server {
listen ;
server_name localhost; #charset koi8-r; #access_log logs/host.access.log main; location / {
root html;
index index.html index.htm;
} location /mrice {
proxy_pass http://mrice/;
} #error_page /.html; # redirect server error pages to the static page /50x.html
#
error_page /50x.html;
location = /50x.html {
root html;
} # proxy the PHP scripts to Apache listening on 127.0.0.1:
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#} # pass the PHP scripts to FastCGI server listening on 127.0.0.1:
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#} # deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
} # another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
# listen ;
# listen somename:;
# server_name somename alias another.alias; # location / {
# root html;
# index index.html index.htm;
# }
#} # HTTPS server
#
#server {
# listen ssl;
# server_name localhost; # ssl_certificate cert.pem;
# ssl_certificate_key cert.key; # ssl_session_cache shared:SSL:1m;
# ssl_session_timeout 5m; # ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_prefer_server_ciphers on; # location / {
# root html;
# index index.html index.htm;
# }
#} }

验证负载是否正常

keepalived 安装

本次使用的是源码安装

tar -xzvf  keepalived-2.0.11.tar.gz
cd keepalived-2.0.11
./configure --prefix=/usr/local/keepalived    安装目录根据需要修改

make && make install

cp keepalived-2.0.11/keepalived/etc/init.d/keepalived /etc/init.d/

cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/

cp keepalived-2.0.11/keepalived/etc/sysconfig/keepalived

cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

配置keepalived.conf

! Configuration File for keepalived

global_defs {
notification_email {
mrice_02@mrice.com
}
notification_email_from mrice@mrice.com
smtp_server 192.168.56.8
smtp_connect_timeout
router_id mrice_backup
}
vrrp_script chk_http_port {
script "/opt/nginx/check_nginx.sh"
interval
weight
} vrrp_instance VI_1 {
state BACKUP
interface eno16777736
virtual_router_id
priority
advert_int
authentication {
auth_type PASS
auth_pass
}
virtual_ipaddress {
192.168.56.80
}
}

其中配置文件中/opt/nginx/check_nginx.sh检查nginx进程

#!/bin/bash
A=`ps -C nginx --no-header |wc -l`
if [ $A -eq ];then
/usr/nginx/sbin/nginx #重启nginx
if [ `ps -C nginx --no-header |wc -l` -eq ];then #nginx重启失败
exit
else
exit
fi
else
exit
fi

通过VIP访问是否正常。

可查看VIP地址在哪台服务器上

[root@mrice_02 sbin]# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:b9:46:b5 brd ff:ff:ff:ff:ff:ff
    inet 192.168.56.130/32 brd 192.168.56.130 scope global eno16777736
       valid_lft forever preferred_lft forever
    inet 192.168.56.80/32 scope global eno16777736
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:feb9:46b5/64 scope link
       valid_lft forever preferred_lft forever

截止目前主备+负载配置完成,过程很简单,很多细节需要动手操作才会发现.

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