Memcache高可用群集

Memcache高可用群集

實驗環境：

實驗目的：

實現存儲內容的主從備份

實驗搭建：

一、主服務器：

1、掛載軟件包

#掛載軟件包
mount.cifs //192.168.100.3/lzp /mnt

#創建目錄
mkdir /opt/magent       
#解壓必要安裝包
cd /mnt/mem
tar zxvf magent-0.5.tar.gz -C /opt/magent/
tar zxvf libevent-2.1.8-stable.tar.gz -C /opt
tar zxvf memcached-1.5.6.tar.gz -C /opt
#安裝必要組件
yum install gcc gcc-c++ make -y

2、對組件進行編譯安裝

#編譯安裝libevent
cd /opt/libevent-2.1.8-stable/
./configure --prefix=/usr
make && make install

#編譯安裝memcached
cd /opt/memcached-1.5.6/
./configure --with-libevent=/usr
make && make install

#編譯安裝magent
cd /opt/magent/
#修改ketama.h配置文件
vim ketama.h
#ifndef SSIZE_MAX
#define SSIZE_MAX 32767
#將#endif移動到第三行，刪除掉末尾的
#endif

vim Makefile
#第一行末尾添加-lm
LIBS = -levent-lm
#編譯
make

#編譯好的magent文件

3、將編譯好的magent文件復制到/usr/bin目錄下，并推送給從服務器

#安裝openssh推送軟件
yum install openssh-clients -y
#將編譯好的magent文件復制到/usr/bin目錄下
cp magent /usr/bin

#推送magent文件
scp magent root@192.168.45.131:/usr/bin
The authenticity of host '192.168.45.131 (192.168.45.131)' can't be established.
ECDSA key fingerprint is SHA256:bw2256OHr5apf7CliZv/fAOyVNVsMmRn+lZ5efeQgTg.
ECDSA key fingerprint is MD5:6f:f6:70:4f:46:64:ec:17:a7:ae:c0:15:1c:8b:55:1c.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.45.131' (ECDSA) to the list of known hosts.
root@192.168.45.131's password: 
magent                                     100%  112KB   5.8MB/s   00:00  

4、關閉防火墻和安全功能

systemctl stop firewalld.service 
setenforce 0

5、安裝keepalived，并進行修改

#安裝keepalived
yum install keepalived -y

#修改配置文件
vim /etc/keepalived/keepalived.conf 

! Configuration File for keepalived
#寫入下列內容
vrrp_script magent {
        script "/opt/shell/magent.sh"
        interval 2
}

global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   #修改route-id
   router_id MAGENT_HA
}

vrrp_instance VI_1 {
    state MASTER
    #修改網卡端口
    interface ens33
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    #修改，調用上邊函數
    track_script {
        magent
   }
    virtual_ipaddress {
    #設置虛擬指向地址
        192.168.45.188
    }
}

6、創建magent腳本

mkdir /opt/shell
cd /opt/shell/
vim magent.sh

#!/bin/bash
K=`ps -ef | grep keepalived | grep -v grep | wc -l`
if [ $K -gt 0 ];then
        magent -u root -n 51200 -l 192.168.45.188 -p 12000 -s 192.168.45.132:
11211 -b 192.168.45.131:11211
else
pkill -9 magent
fi

#給于運行權限
chmod +x magent.sh

7、啟動服務，并查看

#啟動keepalived
systemctl start keepalived.service

#查看遷移地址
ip addr

#啟動memcached 
memcached -m 512k -u root -d -l 192.168.45.132 -p 11211

安裝telent進行測試

yum install telnet -y

二、從服務器

1、掛載軟件包，并關閉防火墻和安全功能

mount.cifs //192.168.100.3/lzp /mnt
#關閉防火墻和安全功能
systemctl stop firewalld.service 
setenforce 0

2、解壓安裝包，并進行編譯

#解壓安裝包
cd /mnt/mem
tar zxvf libevent-2.1.8-stable.tar.gz -C /opt
tar zxvf memcached-1.5.6.tar.gz -C /opt
#安裝必要組件包
yum install gcc gcc-c++ make -y
#編譯安裝libevent
cd /opt/libevent-2.1.8-stable/
./configure --prefix=/usr
make && make install
#編譯安裝memcached
cd /opt/memcached-1.5.6/
./configure --with-libevent=/usr
make && make install

3、安裝keepalived

#安裝keepalived
yum install keepalived -y
#修改keepalived文件
cd /etc/keepalived/
mv keepalived.conf keepalived.conf.bk

vim keepalived.conf

! Configuration File for keepalived

vrrp_script magent {
        script "/opt/shell/magent.sh"
        interval 2
}

global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   #修改router_id
   router_id MAGENT_HB
}

vrrp_instance VI_1 {
    state BACKUP
    #修改網絡接口
    interface ens33
    #修改virtual_router_id
    virtual_router_id 52
    #修改優先級
    priority 90
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    track_script {
        magent
   }
    virtual_ipaddress {
        #修改地址
        192.168.45.188
    }
}

4、創建magent腳本

 mkdir /opt/shell
cd /opt/shell/
vim magent.sh
#!/bin/bash
K=`ip addr | grep 192.168.45.188 | grep -v grep | wc -l`
if [ $K -gt 0 ];then
        magent -u root -n 51200 -l 192.168.45.188 -p 12000 -s 192.168.45.132:
11211 -b 192.168.45.131:11211
else
pkill -9 magent
fi
chmod +x magent.sh

4、啟動服務

#啟動keepalived
systemctl start keepalived.service
 #啟動memcached
memcached -m 512k -u root -d -l 192.168.45.131 -p 11211

安裝telent進行測試

yum install telnet -y

三、客戶機

#關閉防火墻和安全功能
systemctl stop firewalld.service 
setenforce 0
#安裝telnet 
yum install telnet -y
#在telnet中寫入文件
[root@manager ~]# telnet 192.168.45.188 12000
Trying 192.168.45.188...
Connected to 192.168.45.188.
Escape character is '^]'.
add username 0 0 7
1234567
STORED

在從服務器上查看

在主服務器上查看