搭建Keepalived+LNMP架构web动态博客 实现高可用与负载均衡
Posted kingzhe
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环境准备：
192.168.193.80 node1
192.168.193.81 node2
关闭防火墙
[[email protected] ~]# systemctl stop firewalld #两台都关闭 [[email protected] ~]# setenforce 0 setenforce: SELinux is disabled
host文件
[[email protected] ~]# vim /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.193.80 node1 192.168.193.81 node2
keepalived为主备模式
master为node1节点
backup为node2节点
yum源
[epel] name=epel enabled=1 gpgcheck=0 baseurl=https://mirrors.aliyun.com/epel/7/x86_64/ [centos] name=centos base enabled=1 gpgcheck=0 baseurl=http://mirrors.163.com/centos/7/os/x86_64/
master节点配置
下载keeplived
[[email protected] ~]# yum -y install keepalived
[[email protected] ~]# vim /etc/keepalived/keepalived.conf 5,7 s/^/#/g #5-7行加注释 9,16 s/^/#/g #9-16 36,157 s/^/#/g #注释掉
vrrp_instance VI_1 state MASTER interface ens33 virtual_router_id 51 priority 100 #优先级 advert_int 1 #一秒检查一次 一秒给baskup发送一个报文 authentication auth_type PASS #这个是密码认证，和51相辅相成，证明在一个网段里 auth_pass 1111 #密码 virtual_ipaddress 192.168.193.252 #这个就vip 可以有一个也可以有多个
[[email protected] ~]# scp /etc/keepalived/keepalived.conf 192.168.193.81:/etc/keepalived/keepalived.conf #把配置文件传到node2节点
配置backup端
[[email protected] ~]# vim /etc/keepalived/keepalived.conf
vrrp_instance VI_1 state BACKUP interface ens33 virtual_router_id 51 priority 99 advert_int 1 authentication auth_type PASS auth_pass 1111 virtual_ipaddress 192.168.193.252
[[email protected] ~]# systemctl start keepalived #启动 [[email protected] ~]# systemctl start keepalived
[[email protected] ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1 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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:84:7a:50 brd ff:ff:ff:ff:ff:ff inet 192.168.193.80/24 brd 192.168.193.255 scope global ens33 valid_lft forever preferred_lft forever inet 192.168.193.252/32 scope global ens33 #这个就是虚拟IP valid_lft forever preferred_lft forever inet6 fe80::9a7d:fb7d:d10f:e5e8/64 scope link valid_lft forever preferred_lft forever
[[email protected] ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1 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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:5b:98:47 brd ff:ff:ff:ff:ff:ff inet 192.168.193.81/24 brd 192.168.193.255 scope global ens33 valid_lft forever preferred_lft forever inet6 fe80::80ce:27dd:68f9:5adc/64 scope link valid_lft forever preferred_lft forever
实验停止node1节点IP是否发生漂移
[[email protected] ~]# systemctl stop keepalived
[[email protected] ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1 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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:5b:98:47 brd ff:ff:ff:ff:ff:ff inet 192.168.193.81/24 brd 192.168.193.255 scope global ens33 valid_lft forever preferred_lft forever inet 192.168.193.252/32 scope global ens33 valid_lft forever preferred_lft forever inet6 fe80::80ce:27dd:68f9:5adc/64 scope link valid_lft forever preferred_lft forever
发生漂移，这样就成功了，利用了VRRP协议
配置LVS
node1配置
vrrp_instance VI_1 state MASTER interface ens33 virtual_router_id 51 priority 100 advert_int 1 authentication auth_type PASS auth_pass 1111 virtual_ipaddress 192.168.193.252 virtual_server 192.168.193.252 80 delay_loop 3 lb_algo rr lb_kind DR protocol TCP real_server 192.168.193.80 80 weight 1 HTTP_GET url path / status_code 200 connect_timeout 3 nb_get_retry 3 delay_before_retry 3 real_server 192.168.193.81 80 weight 1 HTTP_GET url path / status_code 200 connect_timeout 3 nb_get_retry 3 delay_before_retry 3
node2配置
vrrp_instance VI_1 state BACKUP interface ens33 virtual_router_id 51 priority 99 advert_int 1 authentication auth_type PASS auth_pass 1111 virtual_ipaddress 192.168.193.252 virtual_server 192.168.193.252 80 delay_loop 3 lb_algo rr lb_kind DR protocol TCP real_server 192.168.193.80 80 weight 1 HTTP_GET url path / status_code 200 connect_timeout 3 nb_get_retry 3 delay_before_retry 3 real_server 192.168.193.81 80 weight 1 HTTP_GET url path / status_code 200 connect_timeout 3 nb_get_retry 3 delay_before_retry 3
[[email protected] ~]# yum -y install
[[email protected] ~]# bash 1.sh start 启动成功 [[email protected] ~]# bash 1.sh start 启动成功
#!/bin/bash case $1 in start) echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce ifconfig ens33:0 192.168.193.252/32 broadcast 192.168.193.252 up if [ $? -eq 0 ];then route add -host 192.168.193.252 dev ens33:0 fi echo "启动成功" ;; stop) echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce ifconfig ens33:0 down route del -host 192.168.193.252 echo "删除成功" ;; *) echo "usage start|stop" ;; esac
[[email protected] ~]# systemctl restart keepalived [[email protected] ~]# systemctl restart keepalived
[[email protected] ~]# yum -y install ipvsadm
[[email protected] ~]# ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.193.252:80 rr -> 192.168.193.80:80 Route 1 0 0 -> 192.168.193.81:80 Route 1 0 0
这样Keeplived就继承了LVS的功能 高可用与负载均衡
继续搭建nginx
以下操作2台节点同样操作
[[email protected] ~]# yum install nginx php php-fpm mariadb-server php-mysql -y [[email protected] ~]# yum install nginx php php-fpm mariadb-server php-mysql -y
38 server 39 listen 80 default_server; 40 listen [::]:80 default_server; 41 server_name _; 42 root /var/www/html; #修改网站访问目录 43 index index.php index。html; #修改动态静态 47 48 location / #复制 49 50 51 location ~ ^/.*\\.php$ #添加 52 fastcgi_pass 127.0.0.1:9000; 53 include fastcgi.conf; 54 55
检测配置文件是否有错
[[email protected] ~]# nginx -t nginx: the configuration file /etc/nginx/nginx.conf syntax is ok nginx: configuration file /etc/nginx/nginx.conf test is successful
[[email protected] ~]# systemctl restart mariadb #启动数据库
[[email protected] ~]# cd /var/www/html/ #进入网站根目录
[[email protected] html]# rz #上传动态博客压缩包 rz waiting to receive. zmodem trl+C ? 100% 4548 KB 4548 KB/s 00:00:01 0 Errorszip...
[[email protected] html]# ls
wordpress-3.3.1-zh_CN.zip
[[email protected] html]# unzip wordpress-3.3.1-zh_CN.zip
[[email protected] html]# mv wordpress/* .
[[email protected] html]# cp wp-config-sample.php wp-config.php
[[email protected] html]# vim wp-config.php
18 define(‘DB_NAME‘, ‘king‘); 19 20 /** MySQL 数据库用户名 */ 21 define(‘DB_USER‘, ‘king‘); 22 23 /** MySQL 数据库密码 */ 24 define(‘DB_PASSWORD‘, ‘123‘);
[[email protected] html]# mysql -uroot MariaDB [(none)]> create database king; MariaDB [(none)]> grant all on *.* to [email protected]‘localhost‘ identified by ‘123‘; MariaDB [(none)]> exit Bye
[[email protected] ~]# systemctl restart nginx #两台同样操作 [[email protected] ~]# systemctl restart php-fpm [[email protected] ~]# systemctl restart keepalived [[email protected] ~]# ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.193.252:80 rr -> 192.168.193.80:80 Route 1 0 0 -> 192.168.193.81:80 Route 1 0 0 [[email protected] ~]# ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.193.252:80 rr -> 192.168.193.80:80 Route 1 0 0 -> 192.168.193.81:80 Route 1 0 0
现在访问虚拟IP试验
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