标签:0.0.0.0 通过 rem 取值 实现 完成 host name str linux
PV即点击量,通常是衡量一个网络新闻频道或网站甚至一条网络新闻的重要指标。PV从某种程度上已经成为投资者衡量商业网站表现的最重要的尺度。
PV是一个访问者在24小时到底看了网站的几个页面。
本案例设计采用四层模式实现,主要分为前端反向代理,web层,数据库缓存层和数据库层。前端反向代理层采用主备模式,web层采用集群模式,数据库缓存采用主备模式,数据库层采用主从模式。
主:192.168.177.145 centos7-1
从:192.168.177.135 centos7-2
节点1:192.168.177.132 centos7-3
节点2:192.168.177.133 centos7-4
# rpm -ivh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
# yum install -y keepalived nginx
# vim /etc/keepalived/keepalived.conf //从上修改三个参数
! Configuration File for keepalived
vrrp_script nginx {
script "/opt/shell/nginx.sh"
interval 2
} //添加
global_defs {
route_id NGINX_HA //修改
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
nginx
}
virtual_ipaddress {
192.168.177.188 //虚拟IP
192.168.200.188
}
}
# mkdir /opt/shell
# cd /opt/shell
# vim /opt/shell/nginx.sh
#!/bin/bash
k=`ps -ef | grep keepalived | grep -v grep | wc -l`
if [ $k -gt 0 ];then
/bin/systemctl start nginx.service
else
/bin/systemctl stop nginx.service
fi
# chmod +x /opt/shell/nginx.sh //变成可执行的脚本
从服务器与主服务器配置一样(内容要修改)
# yum install -y keepalived nginx
# vim /etc/keepalived/keepalived.conf //从上修改三个参数
! Configuration File for keepalived
vrrp_script nginx {
script "/opt/shell/nginx.sh"
interval 2
} //添加
global_defs {
route_id NGINX_HB //修改
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 52
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
nginx
}
virtual_ipaddress {
192.168.177.188 //虚拟IP
192.168.200.188
}
}
# mkdir /opt/shell
# cd /opt/shell
# vim /opt/shell/nginx.sh
#!/bin/bash
k=`ps -ef | grep keepalived | grep -v grep | wc -l`
if [ $k -gt 0 ];then
/bin/systemctl start nginx.service
else
/bin/systemctl stop nginx.service
fi
# chmod +x /opt/shell/nginx.sh //变成可执行的脚本
# vim /etc/nginx/nginx.conf //在#gzip on;下面添加:
upstream tomcat_pool {
server 192.168.177.132:8080;
server 192.168.177.133:8080;
ip_hash; #会话稳固功能,否则无法通过vip地址登陆
}
server {
listen 80;
server_name 192.168.177.188; #虚拟出的IP
location / {
proxy_pass http://tomcat_pool;
proxy_set_header X-Real-IP $remote_addr;
}
}
# nginx -t -c /etc/nginx/nginx.conf //测试配置文件语法
# systemctl start keepalived.service //nginx启动会等待一会
# tar xf apache-tomcat-8.5.23.tar.gz
# tar xf jdk-8u144-linux-x64.tar.gz
# mv apache-tomcat-8.5.23/ /usr/local/tomcat8
# mv jdk1.8.0_144/ /usr/local/java
# vim /etc/profile
export JAVA_HOME=/usr/local/java
export JRE_HOME=/usr/local/java/jre
export PATH=$PATH:/usr/local/java/bin
export CLASSPATH=./:/usr/local/java/lib:/usr/local/java/jre/lib
# source /etc/profile
# java -version
# ln -s /usr/local/tomcat8/bin/startup.sh /usr/bin/tomcatup
# ln -s /usr/local/tomcat8/bin/shutdown.sh /usr/bin/tomcatdown
# tomcatup //开启服务
# netstat -anpt | grep 8080
# vim /usr/local/tomcat8/webapps/ROOT/index.jsp //修改默认网页内容
<h1>Server 132!!!</h1>
http://192.168.177.132:8080/ //测试默认测试页是否正常显示(节点)
http://192.168.177.133:8080/
http://192.168.177.188/ 输入调度器地址,也就是虚拟地址,测试两台节点的调度情况。
将192.168.177.132宕机(tomcatdown),看看http://192.168.177.188/会不会显示<h1>Server 133!!!</h1>
# vim server.xml //跳到行尾,在Host name下新增 148行
<Context path="" docBase="SLSaleSystem" reloadable="true" debug="0"></Context>
日志调试信息debug为0表示信息越少,docBase指定访问目录
# yum install -y mariadb-server mariadb
# systemctl start mariadb.service
# systemctl enable mariadb.service //开机自启动
# netstat -anpt | grep 3306
# mysql_secure_installation //常规安全设置
# mysql -u root -p
导入数据库
先挂载
# mysql -u root -p < slsaledb-2014-4-10.sql
# mysql -u root -p
show databases;
GRANT all ON slsaledb.* TO ‘root‘@‘%‘ IDENTIFIED BY ‘abc123‘;
flush privileges;
以下在两台tomcat节点做
# tar xf SLSaleSystem.tar.gz -C /usr/local/tomcat8/webapps/
# cd /usr/local/tomcat8/webapps/SLSaleSystem/WEB-INF/classes
# vim jdbc.properties //修改数据库IP地址是VRRP的虚拟IP,以及授权的用户名root和密码abc123。
网站测试
http://192.168.177.132:8080/ //默认的用户名admin 密码:123456
http://192.168.177.133:8080/
http://192.168.177.188 //输入虚拟地址测试登录,并且关闭主再测试登录
# yum install -y epel-release
# yum install redis -y
# vim /etc/redis.conf
bind 0.0.0.0
# systemctl start redis.service
# netstat -anpt | grep 6379
# redis-cli -h 192.168.177.145 -p 6379 //测试连接
192.168.177.145:6379> set name test //设置name 值是test
192.168.177.145:6379> get name //获取name值
从服务器上多如下一行配置
266行 slaveof 192.168.177.145 6379 //主服务器的IP不是虚拟IP
# redis-cli -h 192.168.177.135 -p 6379 //登录从,获取值,成功说明主从同步成功
192.168.177.135:6379> get name
"test"
配置商城项目中连接redis的参数
38 <!--redis 配置 开始-->
47 <constructor-arg value="192.168.177.188"/>
48 <constructor-arg value="6379"/>
测试缓存效果
# redis-cli -h 192.168.177.188 -p 6379
192.168.177.188:6379> info
keyspace_hits:1 或者 keyspace_misses:2//关注这个值,命中数和未命中数
登录商城,然后反复点击需要数据库参与的操作页面,再回来检查keyspace_hits或者keyspace_misses: 值变化。
配置redis集群主从切换,只在主服务器上操作
# redis-cli -h 192.168.177.145 info Replication //获取当前服务器的角色
# vim /etc/redis-sentinel.conf
17行 protected-mode no17G
68行 sentinel monitor mymaster 192.168.177.145 6379 1 //1表示1台从 注意:修改
98行 sentinel down-after-milliseconds mymaster 3000 //故障切换时间单位是毫秒
# service redis-sentinel start //启动集群
# netstat -anpt | grep 26379
# redis-cli -h 192.168.177.145 -p 26379 info Sentinel //查看集群信息
验证主从切换
在主上
# systemctl stop redis.service
# redis-cli -h 192.168.177.145 -p 26379 info Sentinel //发现主变成了135
验证数据同步情况
# redis-cli -h 192.168.177.135 -p 6379
192.168.177.135:6379> set name2 test2
OK
192.168.177.135:6379> get name2
"test2"
# service redis start //把主启动
# redis-cli -h 192.168.177.145 -p 6379
192.168.175.128:6379> get name2
"test2"
mysql主服务器配置
# vim /etc/my.cnf //[mysqld]下
binlog-ignore-db=mysql,information_schema
character_set_server=utf8
log_bin=mysql_bin
server_id=1
log_slave_updates=true
sync_binlog=1
# systemctl restart mariadb
# netstat -anpt | grep 3306
# mysql -u root -p
show master status; //记录日志文件名称和 位置值
grant replication slave on *.* to ‘rep‘@‘192.168.177.%‘ identified by ‘123456‘;
flush privileges;
mysql从服务器配置
# vim /etc/my.cnf //[mysqld]下
binlog-ignore-db=mysql,information_schema
character_set_server=utf8
log_bin=mysql_bin
server_id=2
log_slave_updates=true
sync_binlog=1
# systemctl restart mariadb
# netstat -anpt | grep 3306
# mysql -u root -p
change master to master_host=‘192.168.177.145‘,master_user=‘rep‘,master_password=‘123456‘,master_log_file=‘mysql_bin.000001‘,master_log_pos=245;
start slave;
show slave status\G;
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
标签:0.0.0.0 通过 rem 取值 实现 完成 host name str linux
原文地址:http://blog.51cto.com/13620936/2152783