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# Copyright (C) 2015 Kristoffer Gronlund
#
# License: GNU General Public License (GPL)
version: 2.2
category: File System
shortdesc: Cluster-aware LVM (auto activation)
longdesc: |
Configures a resource to manage the activation of a volume
group. Before adding this resource, you need to proceed as below
to create new VG and LVs. Refer to manpage lvmlockd(8) for more
detailed steps.
- create VG on shared devices:
vgcreate --shared <vgname> <devices>
- create an LV:
lvcreate -an -L <size> -n <lvname> <vgname>
For LVs in shared VG, there are two activation modes: "exclusive"
and "shared". With the "exclusive" mode, a LV activated on one
host cannot be activated on another, which is the default option.
With the "shared" mode, a LV can be activated concurrently on
multiple hosts, and cluster filesystem like OCFS2 can use it.
If the resource is created with activation_mode="shared", it will
be added to the cLVM group resource. The cLVM group resource is
assumed to be named g-clvm. This is the name of the resource created
by the clvm wizard.
parameters:
- name: id
shortdesc: Volume group instance ID
longdesc: Unique ID for the volume group instance in the cluster.
required: true
unique: true
type: resource
value: vg1
- name: vgname
shortdesc: Volume Group Name
longdesc: LVM volume group name.
required: true
type: string
value: vg1
- name: activation_mode
shortdesc: LVM activation mode
longdesc: |
How a VG/LV is activated in cluster, either "exclusive" (default) or "shared".
It depends on the filesystem you need to create on the LV to choose the
activation mode. For local filesystem like ext4, you need "exclusive" activation.
For cluster filesystem like OCFS2, you need "shared" activation.
required: false
type: string
value: exclusive
- name: clvm-group
shortdesc: cLVM Resource Group ID
longdesc: ID of the cLVM resource group.
type: resource
required: false
value: g-clvm
actions:
- cib: |
primitive {{id}} ocf:heartbeat:LVM-activate
params vgname="{{vgname}}" vg_access_mode="lvmlockd" activation_mode="{{activation_mode}}"
op start timeout=60s
op stop timeout=60s
op monitor interval=30s timeout=90s
- crm: configure modgroup {{clvm-group}} add {{id}}
shortdesc: Add volume group to the cLVM group resource
when: activation_mode == "shared"
|
