红帽全球峰会D.3. 使用标签控制激活
您可以在配置文件中指定在那个主机中只应该激活某个逻辑卷。例如：下面的条目作为激活请求的过滤器使用（比如
vgchange -ay），且只激活 vg1/lvol0 以及那些在该主机的元数据中带 database 标签的逻辑卷和卷组。
activation { volume_list = ["vg1/lvol0", "@database" ] }
activation { volume_list = ["vg1/lvol0", "@database" ] }
There is a special match "@*" that causes a match only if any metadata tag matches any host tag on that machine.
另一个例子就是，考虑一下，在哪里群集中的每一台机器都在配置文件中有以下条目：
tags { hosttags = 1 }
tags { hosttags = 1 }
如果您想要只在主机
db2 中激活 vg1/lvol2，请执行以下操作：
- 可从群集中的任意主机运行
lvchange --addtag @db2 vg1/lvol2。 - 运行
lvchange -ay vg1/lvol2。
这个解决方案包括将主机名保存在卷组元数据中。
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