我们专注攀枝花网站设计 攀枝花网站制作 攀枝花网站建设
成都网站建设公司服务热线:400-028-6601

网站建设知识

十年网站开发经验 + 多家企业客户 + 靠谱的建站团队

量身定制 + 运营维护+专业推广+无忧售后,网站问题一站解决

memcache集群

四台电脑
memcache:192.168.1.201 192.168.1.202
magent: 192.168.1.100 192.168.1.101
实验:
1、安装libevent软件(四台)
[root@localhost ~]# tar -zxvf libevent-2.0.21-stable.tar.gz -C /usr/src/
[root@localhost ~]# cd /usr/src/libevent-2.0.21-stabl
[root@localhost libevent-2.0.21-stable]# ./configure --prefix=/usr/
[root@localhost libevent-2.0.21-stable]# make && make install
2、安装memcached软件(Memcached服务器 2台)
[root@localhost ~]# tar -zxvf memcached-1.4.31.tar.gz -C /usr/src/
[root@localhost ~]# cd /usr/src/memcached-1.4.31/
[root@localhost memcached-1.4.31]# ./configure --enable-memcache --with-libevent=/usr/
[root@localhost memcached-1.4.31]# make && make install
主缓存:
[root@localhost ~]# memcached -d -m 1024 -u root -l 192.168.1.201 -p 11211
备缓存:
[root@localhost ~]# memcached -d -m 1024 -u root -l 192.168.1.202 -p 11211
[root@localhost ~]# netstat -anpt | grep memcached
3、安装magent 软件(Magent 服务器 2台)
[root@localhost ~]# mkdir /usr/magent
[root@localhost ~]# tar -zxvf magent-0.6.tar.gz -C /usr/magent/
[root@localhost ~]# cd /usr/magent/
[root@localhost magent]# vim ketama.h
添加(头部添加):
#ifndef SSIZE_MAX
#define SSIZE_MAX 32767
#endif
[root@localhost magent]# ln -s /usr/lib64/libm.so /usr/lib64/libm.a
[root@localhost magent]# ln -s /usr/lib64/libevent-1.4.so.2 /usr/lib64/libevent.a
无法make的时候需要安装libevent-1.4.so.2
[root@localhost magent]# /sbin/ldconfig
[root@localhost magent]# sed -i "s#LIBS = -levent#LIBS = -levent -lm#g" Makefile
[root@localhost magent]# make
[root@localhost magent]# cp magent /usr/bin/
主缓存和备缓存一样的启动命令(-l 是漂移IP 还没有搭建Keepalived服务 暂时不要启动Magent服务)
[root@localhost ~]# magent -u root -n 51200 -l 192.168.1.10 -p 12000 -s 192.168.1.201:11211 -b 192.168.1.202:11211
[root@localhost ~]# magent -u root -n 51200 -l 192.168.1.10 -p 12000 -s 192.168.1.201:11211 -b 192.168.1.202:11211
-u:用户
-n:最大连接数
-l:magent 对外监听IP 地址
-p:magent 对外监听端口
-s:magent 主缓存IP 地址和端口
-b:magent 备缓存IP 地址和端口
[root@localhost ~]# ps -elf | grep magent
4、安装keepalived 软件(Magent 服务器 2台)
[root@localhost ~]# yum –y install openssl*
[root@localhost ~]# tar -zxvf keepalived-1.2.13.tar.gz -C /usr/src/
[root@localhost ~]# cd /usr/src/keepalived-1.2.13/
[root@localhost keepalived-1.2.13]# ./configure --prefix=/ --with-kernel-dir=/usr/src/kernels/2.6.32-431.el6.x86_64
[root@localhost keepalived-1.2.13]# make && make install
配置主缓存服务器
[root@localhost ~]# vim /etc/keepalived/keepalived.conf
修改:
global_defs {
router_id LVS_DEVEL_R1
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.10
}
}
[root@localhost ~]# service keepalived restart
[root@localhost ~]# ip add show dev eth0
配置备缓存服务器
[root@localhost ~]# vim /etc/keepalived/keepalived.conf
修改:
global_defs {
router_id LVS_DEVEL_R2
}
vrrp_instance VI_1 {
state BACKUP
priority 99
......
virtual_ipaddress {
192.168.1.10
}
---其他参数与主缓存服务器保持一致----
}
[root@localhost ~]# service keepalived restart
[root@localhost ~]# ip add show dev eth0
验证:
客户端ping 192.168.1.10 查看VIP的变化情况。
5、验证:
1)用主缓存节点连接上主缓存的1200端口插入数据
[root@localhost ~]# telnet 192.168.1.10 12000
Trying 192.168.1.10...
Connected to 192.168.1.10.
Escape character is '^]'.
set key 33 0 5
ggggg
STORED
quit
Connection closed by foreign host.
2)查看插入的数据
[root@localhost ~]# telnet 192.168.1.10 12000
Trying 192.168.1.10...
Connected to 192.168.1.10.
Escape character is '^]'.
get key
VALUE key 33 5
ggggg
END
quit
Connection closed by foreign host.
3)连接主缓存节点的11211端口进行查看
[root@localhost ~]# telnet 192.168.1.201 11211
Trying 192.168.1.100...
Connected to 192.168.1.100.
Escape character is '^]'.
get key
VALUE key 33 5
ggggg
END
quit
Connection closed by foreign host.
4)连接主缓存节点的11211端口进行查看
[root@localhost ~]# telnet 192.168.1.202 11211
Trying 192.168.1.200...
Connected to 192.168.1.200.
Escape character is '^]'.
get key
VALUE key 33 5
ggggg
END
quit
Connection closed by foreign host.
说明主缓存节点和备缓存节点都有数据。
宕掉主缓存节点。
1)停止memcached进程(或者断开主缓存节点的网卡),
2)客户端查看
[root@localhost ~]# telnet 192.168.1.10 12000
Trying 192.168.1.10...
Connected to 192.168.1.10.
Escape character is '^]'.
get key
VALUE key 33 5
ggggg
END

为文峰等地区用户提供了全套网页设计制作服务,及文峰网站建设行业解决方案。主营业务为成都网站建设、网站建设、文峰网站设计,以传统方式定制建设网站,并提供域名空间备案等一条龙服务,秉承以专业、用心的态度为用户提供真诚的服务。我们深信只要达到每一位用户的要求,就会得到认可,从而选择与我们长期合作。这样,我们也可以走得更远!

总结:
memcache的优点:可以做多主或者多从
memcache的缺点:当主缓存节点当掉又恢复,之前的缓存数据会丢失。


网页名称:memcache集群
当前地址:http://mswzjz.cn/article/gehgjg.html

其他资讯