ocf_heartbeat_LVM-activate - Man Page

LVM-activate [start | stop | monitor | meta-data | validate-all]

This agent manages LVM activation/deactivation work for a given volume group.

It supports the following modes, controlled by the vg_access_mode parameter:

* lvmlockd * system_id * clvmd * tagging

Notes:

1. There are two possible configuration combinations: lvmlockd+LVM-activate and clvm+LVM-activate. However, it is not possible to use both at the same time!

2. Put all "lvmlockd"/"clvmd" volume groups into auto management by the agent if using the cluster to manage at least one of them. If you manage some manually, the stop action of the lvmlockd agent may fail and the node may get fenced, because some DLM lockspaces might be in use and cannot be closed automatically.

3. The autoactivation property of volume group will be disabled when vg_access_mode is set to system_id.

Option: OCF_CHECK_LEVEL

The standard monitor operation of depth 0 checks if the VG or LV is valid. If you want deeper tests, set OCF_CHECK_LEVEL to 10:

10: read first 1 byte of the underlying device (raw read)

If there are many underlying devs in VG, it will only read one of the devs. This is not perfect solution for detecting underlying devices livable. e.g. iscsi SAN IO timeout will return EIO, and it makes monitor failed.

vgname

The volume group name.

(required, string, no default)

lvname

If set, only the specified LV will be activated.

(optional, string, no default)

vg_access_mode

This option decides which solution will be used to protect the volume group in cluster environment. Optional solutions are: lvmlockd, clvmd, system_id and tagging.

(required, string, no default)

activation_mode

The activation mode decides the visibility of logical volumes in the cluster. There are two different modes: "shared" for cluster filesystem and "exclusive" for local filesystem. With "shared", an LV can be activated concurrently from multiple nodes. With "exclusive", an LV can be activated by one node at a time.

This option only has effect on "lvmlockd"/"clvmd" vg_access_mode. For "system_id" and "tagging", they always mean exclusive activation.

(optional, string, default "exclusive")

tag

The tag used for tagging activation mode.

(optional, string, default "pacemaker")

partial_activation

If set, the volume group will be activated partially even with some physical volumes missing. It helps to set to true when using mirrored logical volumes.

(optional, string, default "false")

degraded_activation

Activate RAID LVs using the "degraded" activation mode. This allows RAID LVs to be activated with missing PVs if all data can be provided with RAID redundancy. The RAID level determines the number of PVs that are required for degraded activation to succeed. If fewer PVs are available, then degraded activation will fail. Also enable majority_pvs.

(optional, string, default "false")

majority_pvs

If set, the VG system ID can be reassigned to a new host if a majority of PVs in the VG are present. Otherwise, VG failover with system ID will fail when the VG is missing PVs. Also enable degraded_activation when RAID LVs are used.

(optional, string, default "false")

This resource agent supports the following actions (operations):

start

Starts the resource. Suggested minimum timeout: 90s.

stop

Stops the resource. Suggested minimum timeout: 90s.

monitor

Performs a detailed status check. Suggested minimum timeout: 90s. Suggested interval: 30s.

meta-data

Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 10s.

validate-all

Performs a validation of the resource configuration. Suggested minimum timeout: 20s.

The following is an example configuration for a LVM-activate resource using the crm(8) shell:

primitive p_LVM-activate ocf:heartbeat:LVM-activate \
  params \
    vgname=string \
    vg_access_mode=string \
  op monitor timeout="90s" interval="30s" depth="0"

The following is an example configuration for a LVM-activate resource using pcs(8)

pcs resource create p_LVM-activate ocf:heartbeat:LVM-activate \
  vgname=string \
  vg_access_mode=string \
  op monitor timeout="90s" interval="30s" OCF_CHECK_LEVEL="0"

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