Nginx双主集群搭建

# 安装依赖和工具
yum install -y vim wget gcc gcc-c++ make automake autoconf libtool pcre pcre-devel zlib zlib-devel openssl openssl-devel net-tools psmisc
 
# 关闭SELinux
sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
 
#下载nginx
wget https://nginx.org/download/nginx-1.22.0.tar.gz
#解压文件
tar -zxvf nginx-1.22.0.tar.gz && cd nginx-1.22.0
 
#编译
 
./configure --prefix=/usr/local/nginx --http-log-path=/var/log/nginx/access.log --error-log-path=/var/log/nginx/error.log --conf-path=/usr/local/nginx/conf/nginx.conf --lock-path=/var/lock/nginx.lock --pid-path=/run/nginx.pid --with-pcre-jit --with-http_ssl_module --with-http_v2_module --with-http_sub_module --with-stream --with-stream_ssl_module --with-http_gzip_static_module --with-http_stub_status_module --with-pcre --with-file-aio --with-http_realip_module --with-http_stub_status_module 
 
make 
#安装
make install
 
#验证版本：
 
/usr/local/nginx/sbin/nginx -V
 
# 创建快捷方式：
 
ln -s /usr/local/nginx/sbin/nginx /usr/bin/nginx
 
创建nginx.service文件，并编辑
vim /lib/systemd/system/nginx.service
 
#内容如下：
 
[Unit]
Description=nginx service
After=network.target
[Service]
Type=forking
ExecStart=/usr/bin/nginx
ExecReload=/usr/bin/nginx -s reload
ExecStop=/usr/bin/nginx -s stop
PrivateTmp=true
[Install]
WantedBy=multi-user.target
 
 
# 开放nginx的80端口
firewall-cmd --zone=public --add-port=80/tcp --permanent
firewall-cmd --reload
 
# 安装keepalived
wget https://keepalived.org/software/keepalived-2.2.8.tar.gz --no-check-certificate
 
tar -zxvf keepalived-2.2.8.tar.gz && cd keepalived-2.2.8
./configure --prefix=/usr/local/keepalived --disable-fwmark 
#选项--disable-fwmark 可用于禁用iptables规则,可防止VIP无法访问,无此选项默认会启用iptables规则
make -j 2 && make install
 
# 安装查看是否版本正确
/usr/local/keepalived/sbin/keepalived -v
 
ln -s /usr/local/keepalived/sbin/keepalived  /usr/bin/keepalived
 
 
# 修改nginx相关首页标识
vim /usr/local/nginx/html/index.html

vim /usr/local/keepalived/etc/keepalived/keepalived.conf

global_defs
{
    notification_email
    {
       75013085@qq.com
    }
    notification_email_from 75013085@qq.com
    smtp_server 127.0.0.1
    stmp_connect_timeout 30
    router_id LVS_DEVEL
}

vrrp_script Monitor_Nginx {
    script "/usr/local/keepalived/scripts/monitor_nginx.sh"
    interval 2
    weight -50
}

# 虚拟IP1, 本机作为Master
vrrp_instance VI_1 {
    state MASTER
    interface ens192
    virtual_router_id 51
    mcast_src_ip 172.16.2.191
    priority 120
    advert_int 1
    track_interface {
        ens192
    }

    authentication {
        auth_type PASS
        auth_pass 202311
    }
    virtual_ipaddress {
        172.16.2.193
    }i
    track_script {
        Monitor_Nginx
    }

}

# 虚拟IP2, 本机作为Backup
vrrp_instance VI_2 {
    state BACKUP
    interface ens192
    virtual_router_id 52
    mcast_src_ip 172.16.2.191
    priority 100
    advert_int 1
    track_interface {
        ens192
    }

    authentication {
        auth_type PASS
        auth_pass 202311
    }
    virtual_ipaddress {
        172.16.2.194
    }
    track_script {
        Monitor_Nginx
    }

}

vim /usr/local/keepalived/etc/keepalived/keepalived.conf
global_defs
{
    notification_email
    {
       75013085@qq.com
    }
    notification_email_from 75013085@qq.com
    smtp_server 127.0.0.1
    stmp_connect_timeout 30
    router_id LVS_DEVEL
}

vrrp_script Monitor_Nginx {
    script "/usr/local/keepalived/scripts/monitor_nginx.sh"
    interval 2
    weight 2
}

# 虚拟IP1, 本机作为BACKUP
vrrp_instance VI_1 {
    state BACKUP
    interface ens192
    virtual_router_id 51
    mcast_src_ip 172.16.2.192
    priority 100
    advert_int 1
    track_interface {
        ens192
    }

    authentication {
        auth_type PASS
        auth_pass 202311
    }
    virtual_ipaddress {
        172.16.2.193
    }
    track_script {
        Monitor_Nginx
    }
}

# 虚拟IP2, 本机作为Master
vrrp_instance VI_2 {
    state MASTER
    interface ens192
    virtual_router_id 52
    mcast_src_ip 172.16.2.192
    priority 120
    advert_int 1
    track_interface {
        ens192
    }

    authentication {
        auth_type PASS
        auth_pass 202311
    }
    virtual_ipaddress {
        172.16.2.194
    }
    track_script {
        Monitor_Nginx
    }

}