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Building a discuz forum (lvs nginx http mysql nfs)

1. IP Planning

Service Name	IP address	Serve
LVS1	192.168.100.110	keepalived ipvsadm
LVS2	192.168.100.111	keepalived ipvsadm
nginx1	192.168.100.113	nginx
nginx2	192.168.100.114	nginx
nfs	192.168.100.116	nfs-util
web1	192.168.100.118	httpd php nfs-util
web2	192.168.100.119	httpd php nfs-util
mysql	192.168.100.121	mysql

Virtual IP

Service Name	IP address	Serve
Virtual IP	192.168.100.100	nginx keepalived

2. Configuration

1.LVS1

​ Turn off the firewall, selinux

# 关闭防火墙
systemctl stop firewalld

# 关闭selinux
setenforce 0

Set ip: 192.168.100.110

# 编辑网卡信息
vi /etc/sysconfig/network-scripts/ifcfg-ens33

# 修改
BOOTPROTO=static
ONBOOT=yes

# 写入
IPADDR=192.168.100.110
NETMASK=255.255.255.0
GATEWAY=192.168.100.2

Download keepalived and ipvsadm

yum -y install keepalived ipvsadm

​ Back up the default configuration file

cp -p /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak

Delete the original file and create new content

# 删除原有文件
rm -rf /etc/keepalived/keepalived.conf 

# 创建新文件
vi /etc/keepalived/keepalived.conf 

Add the following content

! Configuration File for keepalived

# 配置双机热备（主）
lobal_defs {
   router_id 1
}
vrrp_instance VI_1 {
    state MASTER
    interface ens33
    virtual_router_id 1
    priority 120
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    virtual_ipaddress {
        192.168.100.100
    }
}

# 虚拟服务器ip及mysql地址
virtual_server 192.168.100.100 80 {
        delay_loop 15
        lb_algo rr
        lb_kind DR
        protocol TCP
        real_server 192.168.100.113 80 {
        weight 1
        TCP_CHECK {
                connect_port 80
                connect_timeout 3
                nb_get_retry 3
                delay_before_retry 4
                }
        }
        real_server 192.168.100.114 80 {
        weight 1
        TCP_CHECK {
                connect_port 80
                connect_timeout 3
                nb_get_retry 3
                delay_before_retry 4
                }
        }
}

Start keepalived

systemctl start keepalived

Service Module

# 加载系统内核的服务模块
modprobe ip_vs

# 查看运行状态
lsmod | grep ip_vs

Download net network tools

yum -y install net-tools

View network card information

# 停用物理网卡
ifconfig ens33 down

# 启动物理网卡（如在连接工具上，需到虚拟机上启动）
ifconfig ens33 up

# 查看网卡信息（在ens33网卡下是否有ip：192.168.100.100）
ip a

# 查看LVS-DR群集策略规则
ipvsadm -ln

LVS-DR Cluster Strategy

# 查看策略
ipvsadm -ln

2.LVS2

​ Turn off the firewall, selinux

# 关闭防火墙
systemctl stop firewalld

# 关闭selinux
setenforce 0

Set ip: 192.168.100.111

# 编辑网卡信息
vi /etc/sysconfig/network-scripts/ifcfg-ens33

# 修改
BOOTPROTO=static
ONBOOT=yes

# 写入
IPADDR=192.168.100.111
NETMASK=255.255.255.0
GATEWAY=192.168.100.2

Download keepalived and ipvsadm

yum -y install keepalived ipvsadm

​ Back up the default configuration file

cp -p /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak

Delete the original file and create new content

# 删除原有文件
rm -rf /etc/keepalived/keepalived.conf 

# 创建新文件
vi /etc/keepalived/keepalived.conf 

Add the following content

! Configuration File for keepalived

# 配置双机热备（备）
lobal_defs {
   router_id 2
}
vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    virtual_router_id 1
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    virtual_ipaddress {
        192.168.100.100
    }
}

# 虚拟服务器ip及mysql地址
virtual_server 192.168.100.100 80 {
        delay_loop 15
        lb_algo rr
        lb_kind DR
        protocol TCP
        real_server 192.168.100.113 80 {
        weight 1
        TCP_CHECK {
                connect_port 80
                connect_timeout 3
                nb_get_retry 3
                delay_before_retry 4
                }
        }
        real_server 192.168.100.114 80 {
        weight 1
        TCP_CHECK {
                connect_port 80
                connect_timeout 3
                nb_get_retry 3
                delay_before_retry 4
                }
        }
}

Start keepalived

systemctl start keepalived

Service Module

# 加载系统内核的服务模块
modprobe ip_vs

# 查看运行状态
lsmod | grep ip_vs

Download net network tools

yum -y install net-tools

View network card information

# 停用物理网卡
ifconfig ens33 down

# 启动物理网卡（如在连接工具上，需到虚拟机上启动）
ifconfig ens33 up

# 查看网卡信息（在ens33网卡下是否有ip：192.168.100.100）
ip a

# 查看LVS-DR群集策略规则
ipvsadm -ln

LVS-DR Cluster Strategy

# 查看策略
ipvsadm -ln

3.nginx1

​ Turn off firewall, selinux

# 关闭防火墙
systemctl stop firewalld

# 关闭selinux
setenforce 0

Set ip: 192.168.100.113

# 编辑网卡信息
vi /etc/sysconfig/network-scripts/ifcfg-ens33

# 修改
BOOTPROTO=static
ONBOOT=yes

# 写入
IPADDR=192.168.100.113
NETMASK=255.255.255.0
GATEWAY=192.168.100.2

​ Download nginx, keepalived environment

# 配置nginx下载源
cat 
                                   

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