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Latest revisions

# Date Author Comment
53197381 04/20/2011 11:20 am Apollon Oikonomopoulos

Core shared file storage support

This patch introduces core file storage support, consisting of the following:

A configure-time switch for enabling/disabling shared file storage
support and controlling the shared file storage location:
--with-shared-file-storage-dir=. Shared file storage configuration is then...
87bc7ca8 04/20/2011 11:20 am Apollon Oikonomopoulos

Shared file storage initialization code

Add shared file storage handling during cluster initialization.

Signed-off-by: Apollon Oikonomopoulos <>
Signed-off-by: Iustin Pop <>
Reviewed-by: Iustin Pop <>
2cb78cc7 04/20/2011 11:20 am Apollon Oikonomopoulos

Add DTS_MIRRORED frozenset

Use DTS_MIRRORED to indicate mirrored disk templates that allow
migrations/failover.

DTS_MIRRORED is the union of DTS_EXT_MIRROR and DTS_NET_MIRROR.

Signed-off-by: Apollon Oikonomopoulos <>
Reviewed-by: Michael Hanselmann <>...
69266fae 04/20/2011 11:20 am Apollon Oikonomopoulos

Add bdev_sizes RPC call

The bdev_sizes multi-node RPC call returns the sizes of the requested
block devices on the desired nodes. Its intended use is to verify the
existence of a block device on a given node for shared block storage
support.

Block device paths are expected to lie under constants.BLOCKDEV_DIR...
391d0261 04/20/2011 11:20 am Apollon Oikonomopoulos

Shared block storage support

This patch introduces basic shared block storage support.

It introduces a new storage backend, bdev.PersistentBlockDevice, to
use as a backend for shared block storage. The new bdev requires a new
BLOCKDEV_DRIVER_MANUAL constant with the value "manual" and uses it as...
5e2e3283 04/20/2011 11:20 am Apollon Oikonomopoulos

IAllocator changes to work with shared storage

Make cmdlib.IAllocator shared-storage-aware. IAllocator requires secondary
nodes only on DTS_NET_MIRROR disk templates and requires no secondaries for
DTS_EXT_MIRROR templates.

Signed-off-by: Apollon Oikonomopoulos <>...
36a072e8 04/20/2011 11:20 am Apollon Oikonomopoulos

Migration and failover: add iallocator and target_node slots

Add iallocator and target_node slots to OpMigrateInstance and
OpFailoverInstance to facilitate shared-storage-backed instance mobility. Add
iallocator slot to OpMigrateNode (no explicit target_node in this case)....
04967d3a 04/20/2011 11:20 am Apollon Oikonomopoulos

CLI changes to facilitate shared storage migration/failover

Add DST_NODE_OPT to cli.py to use for directly specifying the target node
during migration/failover.

gnt-instance failover/migrate also get passed an iallocator option.

gnt-node failover/migrate get only a target_node option....
b9187ba2 04/20/2011 11:20 am Apollon Oikonomopoulos

Shared storage instance migration

Modify LUMigrateInstance and TLMigrateInstance to allow instance migrations for
instances with DTS_EXT_MIRROR disk templates.

Migrations of shared storage instances require either a target node, or an
iallocator to determine the target node. If none is given, the cluster default...
9a833381 04/20/2011 11:20 am Apollon Oikonomopoulos

Shared storage node migration

Modify LUNodeMigrate to provide node migration for nodes with instances using
shared storage. gnt-node migrate has to be passed an iallocator for migration
of shared storage instances to be performed. When using a shared storage...

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