Memcached內存數據緩存群集實驗
實驗目的：client端通過虛擬IP地址登陸memcached主和從緩存服務器插入數據，主緩存和從緩存是否有數據
步驟：主服務器
[root@localhost ~]# yum install -y gcc gcc-c++ make //搭建安裝環境
[root@localhost ~]# tar xvf libevent-2.1.8-stable.tar.gz
[root@localhost ~]# tar xvf memcached-1.5.6.tar.gz
[root@localhost ~]# mkdir /opt/magent
[root@localhost ~]# tar xvf magent-0.5.tar.gz -C /opt/magent/ //解壓軟件包
[root@localhost libevent-2.1.8-stable]# ./configure --prefix=/usr/
[root@localhost libevent-2.1.8-stable]# make && make install
[root@localhost memcached-1.5.6]# cd ../memcached-1.5.6
[root@localhost memcached-1.5.6]# ./configure --with-libevent=/usr
[root@localhost memcached-1.5.6]# make && make install //編譯安裝
[root@localhost ~]# cd /opt/magent/
[root@localhost magent]# vi ketama.h
#ifndef SSIZE_MAX
#define SSIZE_MAX 32767
[root@localhost magent]# vi Makefile
LIBS = -levent -lm //第一行末尾加-lm （不是數字1）
[root@localhost magent]# make
[root@localhost magent]# cp magent /usr/bin/ //將編譯好的magent程序復制到PATH路徑中
[root@localhost magent]# scp magent [email protected]:/usr/bin/ //把產生的magent文件直接復制到從服務器
[root@localhost magent]# yum install keepalived -y //下載健康檢查工具
[root@localhost shell]# vi /etc/keepalived/keepalived.conf //配置keepalived文件
! Configuration File for keepalived
vrrp_script magent {
script "/opt/shell/magent.sh"
interval 2
}
global_defs {
notification_email {[email protected]
br/>[email protected]
br/>[email protected]
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id MAGENT_HA
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
magent
}
virtual_ipaddress {
192.168.100.188
}
} //定義漂移地址，×××字體要改或添加其余全刪除
[root@localhost shell]# mkdir /opt/shell //創建magent腳本目錄
[root@localhost shell]# cd /opt/shell/
[root@localhost shell]# vi 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 192.168.100.188 -p 12000 -s 192.168.100.10:11211 -b 192.168.100.20:11211
else
pkill -9 magent
Fi
[root@localhost shell]# chmod +x magent.sh //給執行權限
[root@localhost shell]# systemctl start keepalived.service //啟動健康檢查工具
[root@localhost shell]# netstat -anpt | grep 12000
tcp 0 0 192.168.100.188:12000 0.0.0.0:* LISTEN 9582/magent //說明magent 啟動工作了
[root@localhost shell]# cat /var/log/messages //查看日誌
……
Transition to MASTER STATE
……
[root@localhost shell]# ip addr //確定定義的漂移地址存在
---從服務器配置--
[root@localhost shell]# yum install -y gcc gcc-c++ make //搭建安裝環境
[root@localhost shell]# tar xvf libevent-2.1.8-stable.tar.gz
[root@localhost shell]# tar xvf memcached-1.5.6.tar.gz
[root@localhost ~]# cd libevent-2.1.8-stable
[root@localhost libevent-2.1.8-stable]# ./configure --prefix=/usr/
[root@localhost libevent-2.1.8-stable]# make && make install
[root@localhost libevent-2.1.8-stable]# cd ../memcached-1.5.6
[root@localhost memcached-1.5.6]# ./configure --with-libevent=/usr
[root@localhost memcached-1.5.6]# make && make install //編譯安裝
[root@localhost memcached-1.5.6]# ln -s /usr/lib/libevent-2.1.so.6 /usr/lib64/libevent-2.1.so.6
[root@localhost memcached-1.5.6]# yum install keepalived -y //下載健康檢查工具
[root@localhost memcached-1.5.6]# cd /etc/keepalived/
[root@localhost keepalived]# mv keepalived.conf keepalived.conf.bak
[root@localhost keepalived]# scp [email protected]:/etc/keepalived/keepalived.conf ./ 把主服務器的配置文件復制過來
[root@localhost keepalived]# vi keepalived.conf
! Configuration File for keepalived
vrrp_script magent {
script "/opt/shell/magent.sh"
interval 2
}
global_defs {
notification_email {[email protected]
br/>[email protected]
br/>[email protected]
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id MAGENT_HB
}
vrrp_instance VI_1 {
state BACKUO
interface ens33
virtual_router_id 52
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
magent
}
virtual_ipaddress {
192.168.100.188
}
} //×××字體需要修改
[root@localhost keepalived]# mkdir /opt/shell
[root@localhost keepalived]# cd /opt/shell/
[root@localhost shell]# vi magent.sh
#!/bin/bash
K=ip addr | grep 192.168.100.188 | grep -v grep | wc -l
if [ $K -gt 0 ]; then
magent -u root -n 51200 -l 192.168.100.188 -p 12000 -s 192.168.100.10:11211 -b 192.168.100.20:11211
else
pkill -9 magent
Fi
[root@localhost shell]# chmod +x magent.sh
[root@localhost shell]# systemctl start keepalived.service
[root@localhost shell]# cat /var/log/messages //驗證主從
……
Entering BACKUP STATE
……
[root@localhost shell]# memcached -m 512k -u root -d -l 192.168.100.10 -p 11211 //啟動主
[root@localhost shell]# memcached -m 512k -u root -d -l 192.168.100.20 -p 11211 //啟動從
---在客戶端測試---
[root@localhost ~]# yum install -y telnet
[root@localhost ~]# telnet 192.168.100.188 12000
Trying 192.168.100.188...
Connected to 192.168.100.188.
Escape character is ‘^]‘.
add username 0 0 7
1234567
主服務器
[root@localhost shell]# telnet 192.168.100.10 11211
Trying 192.168.100.10...
Connected to 192.168.100.10.
Escape character is ‘^]‘.
get username
VALUE username 0 7
1234567
從服務器
[root@localhost shell]# telnet 192.168.100.20 11211
Trying 192.168.100.20...
Connected to 192.168.100.20.
Escape character is ‘^]‘.
get username
VALUE username 0 7
1234567
客戶端再進
[root@localhost ~]# telnet 192.168.100.188 12000
Trying 192.168.100.188...
Connected to 192.168.100.188.
Escape character is ‘^]‘.
add ok 0 0 6
123456
STORED
get ok
VALUE ok 0 6
123456 //新建ok
從服務器跟主服務器都檢證一下是否都有數據插入
主---
[root@localhost shell]# telnet 192.168.100.10 11211
Trying 192.168.100.10...
Connected to 192.168.100.10.
Escape character is ‘^]‘.
get ok
VALUE ok 0 6
123456
從---
[root@localhost shell]# telnet 192.168.100.20 11211
Trying 192.168.100.20...
Connected to 192.168.100.20.
Escape character is ‘^]‘.
get username
VALUE username 0 7
1234567
END
get ok
VALUE ok 0 6
123456
//把主停了業務不影響
Memcached內存數據緩存群集實驗