启用MemCached的SASL认证

memcached从1.4.3版本开始，能支持SASL认证

比较适合多个应用共用一个memcached集群

需要在编译时，加上–enable-sasl选项

启动memcached时，增加-S的选项

./configure –prefix=%{datadir}  –enable-sasl

/usr/local/bin/memcached -S -d -u nobody

SASL认证也可以有很多种认证机制，比如pam，shadow，ldap等

 

下面配置成使用shadow方式去认证

#修改/etc/sysconfig/saslauthd文件

MECH=shadow

#设置用户的SASL认证密码

saslpasswd2 -c -a memcached memuser

#最终生成的DB文件在/etc/下

-rw-r—– 1 root root 12288 Mar  6 11:52 /etc/sasldb2

#可以查看当前的SASL用户

sasldblistusers2

 

下面配置成通过pam-mysql使用mysql数据库的方式去认证

#首先安装pam-mysql

wget "http://prdownloads.sourceforge.net/pam-mysql/pam_mysql-0.7RC1.tar.gz"

./configure –with-mysql=/opt/apps_install/mysql-5.5.17

make & make install

#增加一个软链接

ln -s /lib/security/pam_mysql.so /lib64/security/pam_mysql.so

#修改saslauthd配置

MECH=pam

#编辑pam.d的memcached配置

auth sufficient pam_mysql.so  user=sasl passwd=saslpwd host=xxx db=dbname table=t_app_info usercolumn=appid passwdcolumn=secret crypt=0 sqllog=1 verbose=1

account required pam_mysql.so user=sasl passwd=saslpwd host=xxx db=dbname table=t_app_info usercolumn=appid passwdcolumn=secret crypt=0 sqllog=1 verbose=1

#新增加memcached的配置文件/etc/sasl2/memcached.conf

pwcheck_method: saslauthd

#重启saslauthd

/etc/init.d/saslauthd restart

#测试saslauthd认证已经成功

/usr/sbin/testsaslauthd -s /etc/pam.d/memcached -u 10000 -p pwd

0: OK "Success."

 

memcached的java client，如spymemcached和xmemcached都已经支持SASL认证了

#xmemcached认证示例

MemcachedClientBuilder builder = new XMemcachedClientBuilder(AddrUtil.getAddresses("10.x.xx.xx:11211"));

builder.addAuthInfo(AddrUtil.getOneAddress("10.x.xx.xx:11211"), AuthInfo.plain("10000", "pwd"));

builder.setCommandFactory(new BinaryCommandFactory());

client=builder.build();

String v = client.get("test2");