nginx+keepalived+tomcat

第一部分环境准备
nginx+keepalived服务器两台（调度器，双机热备）

IP地址192.168.80.100（lvs01 主机名zlf1)
192.168.80.101（lvs02 主机名zlf2)
软件需求：nginx安装包（nginx-1.13.5.tar.gz）keepalived安装包（keepalived-2.0.7.tar.gz）

第二部分部署调度器搭建nginx+keepalived（双机热备）
以下在两台nginx调度服务器上操作
第一步：配置主服务器（192.168.80.100 )
-------安装nginx服务-------
yum install -y gcc gcc-c++ make openssl-devel zlib-devel pcre-devel //安装编译工具及插件

useradd -s /sbin/nologin -M nginx //创建程序用户
tar xf nginx-1.13.5.tar.gz -C /opt/
cd /opt/nginx-1.13.5/

./configure --prefix=/usr/local/nginx --user=nginx --group=nginx
--with-file-aio --with-http_flv_module --with-http_stub_status_module
--with-http_ssl_module --with-http_gzip_static_module
--with-http_realip_module

make && make install //编译安装

以下编译nginx主配置文件
vi /usr/local/nginx/conf/nginx.conf //删除内容添加以下的内容

user nginx nginx;
worker_processes  1;#error_log  logs/error.log;
#error_log  logs/error.log  notice;
error_log  logs/error.log  info;pid        logs/nginx.pid;events {worker_connections  1024;
}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;add_header X-Server $hostname;server_names_hash_bucket_size 128;server_name_in_redirect off;sendfile        on;tcp_nopush     on;tcp_nodelay on;#keepalive_timeout  0;keepalive_timeout  65;client_header_buffer_size 32k;large_client_header_buffers 4 128k;client_max_body_size 512m;open_file_cache max=65535 inactive=20s;open_file_cache_valid 30s;open_file_cache_min_uses 1;gzip  on;gzip_static on;gzip_http_version 1.1;gzip_comp_level 2;gzip_min_length 1024;gzip_vary on;gzip_types text/plain text/javascript application/x-javascript text/css text/xml application/xml application/xml+rss;server_tokens off;fastcgi_connect_timeout 300;fastcgi_send_timeout 300;fastcgi_read_timeout 300;fastcgi_buffer_size 512k;fastcgi_buffers 6 512k;fastcgi_busy_buffers_size 512k;fastcgi_temp_file_write_size 512k;fastcgi_intercept_errors on;client_body_buffer_size 128k;proxy_connect_timeout 600;proxy_read_timeout 600;proxy_send_timeout 600;proxy_buffer_size 32k;proxy_buffers 4 32k;proxy_busy_buffers_size 64k;proxy_temp_file_write_size 2m;proxy_ignore_client_abort on;proxy_cache_path /usr/local/nginx/cache_temp levels=2:2keys_zone=cache_temp:128m inactive=30m max_size=2g;proxy_cache_valid 200 302 10m;include /usr/local/nginx/conf/conf.d/*.conf;server {listen       80;server_name  localhost;#charset koi8-r;charset UTF-8;#access_log  logs/host.access.log  main;location / {root   html;index  index.html index.htm;}#error_page  404              /404.html;# redirect server error pages to the static page /50x.html#error_page   500 502 503 504  /50x.html;location = /50x.html {root   html;}# proxy the PHP scripts to Apache listening on 127.0.0.1:80##location ~ \.php$ {#    proxy_pass   http://127.0.0.1;#}# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000##location ~ \.php$ {#    root           html;#    fastcgi_pass   127.0.0.1:9000;#    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       8000;#    listen       somename:8080;#    server_name  somename  alias  another.alias;#    location / {#        root   html;#        index  index.html index.htm;#    }#}# HTTPS server##server {#    listen       443 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;#   }#}}

cd /usr/local/nginx/conf/ //以下编辑子配置文件

mkdir conf.d //创建子配置项
cd conf.d/ //切换工作目录

vi lvs01.conf //新建子配置文件

server {listen 80;server_name lvs01 192.168.80.100;       //服务器名称与IP地址index index.html index.jsp;root /usr/local/nginx/html;access_log /usr/local/nginx/logs/tomcat.aa.com_access.log main;location ~ .*\.jsp$ {index index.jsp;proxy_set_header HOST $host;proxy_set_header X-Real-IP $remote_addr;proxy_set_header Client-IP $remote_addr;proxy_set_header X-For $proxy_add_x_forwarded_for;proxy_pass http://center_pool;}location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$ {expires 30d;proxy_pass http://center_pool;}location ~ .*\.(js|css)?$ {expires 1h;proxy_pass http://center_pool;}
}

vi pool.conf //创建服务器池

upstream center_pool {server 192.168.80.102:8080;server 192.168.80.103:8080;
}

vi /etc/init.d/nginx //制作启动脚本

#!/bin/bash
# chkconfig: 35 99 20
# description: Nginx Service Control Script
PROG="/usr/local/nginx/sbin/nginx"
PIDF="/usr/local/nginx/logs/nginx.pid"
case "$1" instart)$PROG;;stop)kill -s QUIT $(cat $PIDF);;restart)$0 stop$0 start;;reload)kill -s HUP $(cat $PIDF);;*)echo "Usage: $0 {start|stop|restart|reload}"exit 1
esac
exit 0

chmod +x /etc/init.d/nginx //增加执行权限
chkconfig --add nginx //加入系统管理服务
service nginx start //启动nginx服务
netstat -anpt | grep nginx //查看监听端口

部署keepalived
yum -y install popt-devel kernel-devel openssl-devel //安装前的环境库
tar xf keepalived-2.0.7.tar.gz -C /opt //解压
cd /opt/keepalived-2.0.7/ //切换工作目录
./configure --prefix=/ //指定安装到根目录下
make && make install //编译与安装
cp keepalived/etc/init.d/keepalived /etc/init.d/ //将keepalived脚本放在service启动程序中
systemctl enable keepalived && systemctl start keepalived //设置开机自启
//以下编辑keepalived配置文件
vi /etc/keepalived/keepalived.conf 进入删除里面插入下面内容 lvs2 对应BACKUP

! Configuration File for keepalived
global_defs {route_id NGINX-01}
vrrp_script nginx {script "/opt/nginx.sh"interval 2weight -10
}
vrrp_instance VI_1 {state MASTERinterface ens33virtual_router_id 51priority 150advert_int 1authentication {auth_type PASSauth_pass 1111}track_script {nginx}virtual_ipaddress {192.168.80.188}
}

vi /opt/nginx.sh //判断keepalived进程是否存在，在就启动nginx不在就关闭

#!/bin/bash
#Filename:nginx.sh
A=$(ps -ef | grep keepalived | grep -v grep | wc -l)
if [ $A -gt 0 ]; thenservice nginx start
elseservice nginx stop
fi

chmod +x /opt/nginx.sh //添加执行权限
systemctl restart keepalived //重启keepalived服务
ip addr show dev ens33 //查看漂移地址是否生成

---------------测试验证------------
systemctl stop keepalived //关闭keepalived服务
yum install psmisc -y //安装killall命令
killall -9 nginx //关闭nignx服务
netstat -anpt | grep nginx //80端口已停止运行

systemctl start keepalived //开启keepalived服务
netstat -anpt | grep nginx //nginx随keepalived启动

cat /var/log/messages //查看日志

验证成功

第二步：配置从服务器（192.168.80.101）
安装nginx服务与主服务器一样省略过程
vi /usr/local/nginx/conf/nginx.conf //以下编译nginx主配置文件（和主服务器配置一样)

以下编辑子配置文件（注意与主服务器不同项）

cd /usr/local/nginx/conf/
mkdir conf.d
cd conf.d/

vi lvs02.conf //新建子配置文件

server {listen 80;server_name lvs02 192.168.80.101;index index.html index.jsp;root /usr/local/nginx/html;access_log /usr/local/nginx/logs/tomcat.aa.com_access.log main;location ~ .*\.jsp$ {index index.jsp;proxy_set_header HOST $host;proxy_set_header X-Real-IP $remote_addr;proxy_set_header Client-IP $remote_addr;proxy_set_header X-For $proxy_add_x_forwarded_for;proxy_pass http://center_pool;}location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$ {expires 30d;proxy_pass http://center_pool;}location ~ .*\.(js|css)?$ {expires 1h;proxy_pass http://center_pool;}
}

vi pool.conf //创建服务器池

upstream center_pool {server 192.168.80.102:8080;server 192.168.80.103:8080;
}

vi /etc/init.d/nginx //制作启动脚本

#!/bin/bash
# chkconfig: 35 99 20
# description: Nginx Service Control Script
PROG="/usr/local/nginx/sbin/nginx"
PIDF="/usr/local/nginx/logs/nginx.pid"
case "$1" instart)$PROG;;stop)kill -s QUIT $(cat $PIDF);;restart)$0 stop$0 start;;reload)kill -s HUP $(cat $PIDF);;*)echo "Usage: $0 {start|stop|restart|reload}"exit 1
esac
exit 0

chmod +x /etc/init.d/nginx //增加执行权限
chkconfig --add nginx //加入系统管理服务
service nginx start //启动nginx服务
netstat -anpt | grep nginx //查看服务监听端口

部署keepalived
测试验证
查看从服务器状态

yum -y install popt-devel kernel-devel openssl-devel
tar xf keepalived-2.0.7.tar.gz -C /opt/
cd /opt/keepalived-2.0.7/
./configure --prefix=/
make && make install
cp keepalived/etc/init.d/keepalived /etc/init.d/

vi /etc/keepalived/keepalived.conf //进入删除里面插入下面内容

! Configuration File for keepalived
global_defs {route_id NGINX-02}
vrrp_script nginx {script "/opt/nginx.sh"interval 2weight -10
}
vrrp_instance VI_1 {state BACKUPinterface ens33virtual_router_id 51priority 140advert_int 1authentication {auth_type PASSauth_pass 1111}track_script {nginx}virtual_ipaddress {192.168.80.188}
}

vi /opt/nginx.sh //创建nginx启动脚本

#!/bin/bash
A=$(ip addr | grep 192.168.80.188/32 | grep -v grep | wc -l)
if [ $A -gt 0 ]; then/etc/init.d/nginx startelse/etc/init.d/nginx stop
fi

chmod +x /opt/nginx.sh //添加权限
systemctl start keepalived //开启服务

[root@lvs02 ~]# ip addr show dev ens33 //查看漂移地址

由于主服务器在运行，漂移地址并未同步过来
当主服务器在运行的时候，从服务器虚拟地址并未生成，nginx服务并未随keepalived启动
二：模拟主服务故障

主服务器
service keepalived stop //关闭服务
killall -9 nginx //杀死nginx服务
netstat -anpt | grep 80 //80端口已经不再运行了
[root@lvs01 ~]# ip addr show dev ens33

漂移地址消失，不工作
2. 从服务器
[root@lvs02 ~]# ip addr show dev ens33 //查看漂移地址

//漂移地址自动生成
netstat -anpt | grep nginx

//服务器检测到虚拟地址，nginx服务自动启动开始工作
三：模拟主服务器恢复工作

主服务器
service keepalived start
ip addr show dev ens33

netstat -anpt | grep nginx

//主服务器已恢复工作
2. 从服务器

ip addr show dev ens33 //查看地址

//漂移地址自动移除
netstat -anpt | grep 80 //nginx自动停止服务
//双机热备验证成功

第三部分部署服务器池—搭建Tomcat
//以下在两台tomcat服务器上操作
第一步：部署第一个节点服务器TM01（192.168.80.30）
----------部署java环境，jdk---------
在这里插入图片描述
tar xf jdk-8u144-linux-x64.tar.gz -C /opt/ //解压jdk
cd /opt //切换工作目录
cp -rf jdk1.8.0_144/ /usr/local/java //创建java源目录
vi /etc/profile //进入环境配置文件中
最下面添加以下内容：

export JAVA_HOME=/usr/local/java
export JRE_HOME=/usr/local/java/jre
export PATH=$PATH:/usr/local/java/bin
export CLASSPATH=./:/usr/local/java/lib:/usr/local/java/jre/lib

source /etc/profile //立即生效
java -version //查看版本

java环境部署完成

----------部署tomcat----------
tar xf apache-tomcat-8.5.34.tar.gz -C /opt/ //解压apache-tomcat
cd /opt //切换工作目录
cp -rf apache-tomcat-8.5.34/ /usr/local/tomcat8 //创建tomcat源目录
//做个软链接，使tomcat开启与关闭更加方便
ln -s /usr/local/tomcat8/bin/startup.sh /usr/bin/tomcatup //开启
ln -s /usr/local/tomcat8/bin/shutdown.sh /usr/bin/tomcatdown //关闭
tomcatup //开启tomcat

netstat -anpt | grep 8080 //查看监听端口

-----------验证------------

浏览器访问默认主页：http://192.168.80.102:8080

tomcat部署成功
2. 服务器池中有两台tomcat服务器，为了便于识别，主页上添加点标记
vi /usr/local/tomcat8/webapps/ROOT/index.jsp //进入tomcat的jsp页面中
添加一行内容：
35gg找到body在下面插入<h1>service AA</h1>
再次访问默认主页http://192.168.80.102:8080

第二步：部署第二个节点服务器TM02（192.168.80.103:8080）

第三步：验证nginx调度器漂移地址轮询点击刷新实现轮询效果
网页访问http://192.168.80.188/index.jsp

到此nginx+keepalived+tomcat搭建完成

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