Red Hat GLOBAL FILE SYSTEM 5.0, Руководство администратора

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if the hostname is
host1
.
tags { tag1 { } tag2 { host_list = ["host1"] } }
3. Controlling Activation with Tags
You can specify in the configuration file that only certain logical volumes should be activated on
that host. For example, the following entry acts as a filter for activation requests (such as
vgchange -ay
) and only activates
vg1/lvol0
and any logical volumes or volume groups with
the
database
tag in the metadata on that host.
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.
As another example, consider a situation where every machine in the cluster has the following
entry in the configuration file:
tags { hosttags = 1 }
If you want to activate
vg1/lvol2
only on host
db2
, do the following:
1. Run
lvchange --addtag @db2 vg1/lvol2
from any host in the cluster.
2. Run
lvchange -ay vg1/lvol2
.
This solution involves storing hostnames inside the volume group metadata.
Appendix C. LVM Object Tags
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