memcache分布式集群（keepalived+magent+memcache）
拓扑如下http://s1.运维网.com/images/20180905/1536162829439259.png
ip地址分配
magent1:192.168.154.131
magent2:192.168.154.132
memcache主：192.168.154.141
memcache从：192.168.154.142 软件包（所有软件直接下载到/root/下）
magent上：libevent-2.0.22-stable.tar.gz、magent-0.6.tar.gz、keepalived-1.4.4.tar.gz
下载地址：
下载地址：
下载地址：http://www.keepalived.org/software/
memcache上：libevent-2.0.22-stable.tar.gz、memcached-1.4.33.tar.gz
下载地址：http://memcached.org/downloads memcache上（主、从上的命令都一样）
tar zxf libevent-2.0.22-stable.tar.gz
tar zxf memcached-1.4.33.tar.gz
cd libevent-2.0.22-stable
./configure --prefix=/usr/
make && make install
cd ../memcache-1.4.33
./configure --prefix=/usr/local/memcached --with-libevent=/usr/
make&& make install
##memcache主## memcached -d -m 1024 -u root -l 192.168.154.141 -p 11211
##memcache从## memcached -d -m 1024 -u root -l 192.168.154.142 -p 11211
firewall-cmd --add-port=11211/tcp --permanent
firewall-cmd --reload 可通过ss或netstat命令查看memcache是否正常启动
ss -lnpt | grep memcache
netstat -anpt | grep memcache magent上（1和2配置一样）
tar zxf libevent-2.0.21-stable.tar.gz
cd libevent-2.0.21-stable
./configure --prefix=/usr/
make && make install
cd ~
mkdir /usr/magent
tar zxf magent-0.6.tar.gz -C /usr/magent vim /usr/magent/ketama.h
#添加在文件开头
#ifndef SSIZE_MAX
#define SSIZE_MAX 32767
#endif 注意：下面两个文件libm.so、libevent-1.4.so.2如果和我的所在目录不同，可通过find命令查找，然后在ln -s创建软链接即可
ln -s /usr/lib64/libm.so /usr/lib64/libm.a
ln -s /usr/lib64/libevent-1.4.so.2 /usr/lib64/libevent.acd /usr/magent
/sbin/ldconfig
sed -i "s#LIBS = -levent#LIBS = -levent -lm#g" Makefile
make
cp magent /usr/bin/
##magent1## magent -u root -n 51200 -l 192.168.154.131 -p 12000 -s 192.168.154.141:11211 -b 192.168.154.142:11211
##magent2## magent -u root -n 51200 -l 192.168.154.132 -p 12000 -s 192.168.154.141:11211 -b 192.168.154.142:11211
ps -elf | grep magent
##检测magent是否正常运行yum -y install keepalived magent1的keepalived配置vim /etc/keepalived/keepalived.conf
global_defs {
router_id M1
}
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 {
192.168.154.100
}
}
magent2的keepalived配置vim /etc/keepalived/keepalived.conf
global_defs {
router_id M2
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 100
advert_int 1 authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.154.100
}
}
systemctl start keepalived
systemctl enable keepalived 部署完成，你可以直接通过Telnet连接keepalived的vip，以连接到memcahe，操作一些数据，然后查看，验证集群的可用性。这里不一一赘述了。
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