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  • 7分钟弄懂啥是高可用基石-VIP
  • 从零开始实操VIP
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  • 7分钟弄懂啥是高可用基石-VIP
  • 从零开始实操VIP

Centos7 yum更新

• 安装阿里yum源

wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

或者

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

• yum makecache检查安装是否正确，并进行yum源更新

• 安装vim, yum install -y vim

Nginx yum安装

• 新建/etc/yum.repos.d/nginx.repo，填入如下配置

[nginx-stable]
name=nginx stable repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true

[nginx-mainline]
name=nginx mainline repo
baseurl=http://nginx.org/packages/mainline/centos/$releasever/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true

• 安装Nginx, yum install nginx

• 启动Nginx, systemctl start nginx

systemctl enable nginx

• 为测试用,关闭防火墙, systemctl stop firewalld
  systemctl disable firewalld

• 修改Nginx欢迎页面，分别是哪一个机器上的Nginx
  vim /usr/share/nginx/html/index.html

加入

VM1/VM2/VM3

Keepalived安装

• 下载安装keepalived

curl -o keepalived-2.3.1.tar.gz https://www.keepalived.org/software/keepalived-2.3.1.tar.gz
tar zxvf keepalived-2.3.1.tar.gz
cd keepalived-2.3.1
yum install make gcc libnl3-devel openssl-devel libnfnetlink-devel net-snmp-devel
./configure --prefix=/usr/local/keepalived
make && make install
/usr/local/keepalived/sbin/keepalived -v
cp keepalived/etc/init.d/keepalived /etc/init.d
cp keepalived/etc/sysconfig/keepalived /etc/sysconfig/
systemctl enable keepalived
mkdir /etc/keepalived
vim /etc/keepalived/keepalived.conf

vrrp_instance VI_101.250 {
    state MASTER               #备机写BACKIP
    interface ens33            #网卡名字
    virtual_router_id 110      #备机和主机的虚拟路由ID要一样
    priority 200               #优先级备机应该比主低
    advert_int 1			   #发送arp包间隔
    authentication {
        auth_type PASS        #授权账号密码主备相同
        auth_pass 123456
    }
    virtual_ipaddress {
        192.168.169.100    #指定VIP，可以指定多个，一个一行，可以指定当前能访问的通的任意子网IP
    }
}

• 启动 keepalived， systemctl start keepalived

• 重启后，启动

systemctl start nginx
systemctl start keepalived