Implement Revert-to-snapshot in HNAS Driver
This change adds revert-to-snapshot functionality to the HNAS driver. Implements: blueprint hnas-revert-to-snapshot Change-Id: I3f54edfbd272333b70a27becf469cd09f36e8371
This commit is contained in:
Rodrigo Barbieri
parent
d4a379d083
commit
cf9a5efbef
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@ -53,7 +53,7 @@ Mapping of share drivers and share features support
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+----------------------------------------+-----------------------+-----------------------+--------------+--------------+------------------------+----------------------------+--------------------------+--------------------+
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| HDFS | K | \- | M | \- | K | K | \- | \- |
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+----------------------------------------+-----------------------+-----------------------+--------------+--------------+------------------------+----------------------------+--------------------------+--------------------+
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| Hitachi HNAS | L | L | L | M | L | L | O | \- |
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| Hitachi HNAS | L | L | L | M | L | L | O | O |
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+----------------------------------------+-----------------------+-----------------------+--------------+--------------+------------------------+----------------------------+--------------------------+--------------------+
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| Hitachi HSP | N | N | N | N | \- | \- | \- | \- |
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+----------------------------------------+-----------------------+-----------------------+--------------+--------------+------------------------+----------------------------+--------------------------+--------------------+
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@ -224,7 +224,7 @@ More information: :ref:`capabilities_and_extra_specs`
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+----------------------------------------+-----------+------------+--------+-------------+-------------------+--------------------+-----+----------------------------+--------------------+
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| HDFS | \- | K | \- | \- | \- | L | \- | K | \- |
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+----------------------------------------+-----------+------------+--------+-------------+-------------------+--------------------+-----+----------------------------+--------------------+
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| Hitachi HNAS | \- | L | N | \- | L | \- | \- | L | \- |
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| Hitachi HNAS | \- | L | N | \- | L | \- | \- | L | O |
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+----------------------------------------+-----------+------------+--------+-------------+-------------------+--------------------+-----+----------------------------+--------------------+
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| Hitachi HSP | \- | N | \- | \- | N | \- | \- | \- | \- |
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+----------------------------------------+-----------+------------+--------+-------------+-------------------+--------------------+-----+----------------------------+--------------------+
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@ -552,6 +552,7 @@ class HitachiHNASDriver(driver.ShareDriver):
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'qos': False,
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'thin_provisioning': True,
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'dedupe': dedupe,
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'revert_to_snapshot_support': True,
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}
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LOG.info(_LI("HNAS Capabilities: %(data)s."),
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@ -703,6 +704,40 @@ class HitachiHNASDriver(driver.ShareDriver):
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{'shr_id': share['id'],
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'shr_size': six.text_type(new_size)})
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def revert_to_snapshot(self, context, snapshot, share_server=None):
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"""Reverts a share to a given snapshot.
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:param context: The `context.RequestContext` object for the request
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:param snapshot: The snapshot to which the share is to be reverted to.
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:param share_server: Data structure with share server information.
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Not used by this driver.
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"""
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self._check_fs_mounted()
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hnas_share_id = self._get_hnas_share_id(snapshot['share_id'])
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hnas_snapshot_id = self._get_hnas_snapshot_id(snapshot)
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dest_path = os.path.join('/shares', hnas_share_id)
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src_path = os.path.join('/snapshots', hnas_share_id, hnas_snapshot_id)
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self.hnas.tree_delete(dest_path)
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self.hnas.vvol_create(hnas_share_id)
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self.hnas.quota_add(hnas_share_id, snapshot['size'])
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try:
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self.hnas.tree_clone(src_path, dest_path)
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except exception.HNASNothingToCloneException:
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LOG.warning(_LW("Source directory is empty, creating an empty "
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"directory."))
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LOG.info(_LI("Share %(share)s successfully reverted to snapshot "
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"%(snapshot)s."), {'share': snapshot['share_id'],
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'snapshot': snapshot['id']})
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def _get_hnas_share_id(self, share_id):
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hnas_id = self.private_storage.get(share_id, 'hnas_id')
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@ -95,6 +95,7 @@ snapshot_nfs = {
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'share': share_nfs,
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'provider_location': '/snapshots/aa4a7710-f326-41fb-ad18-b4ad587fc87a/'
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'abba6d9b-f29c-4bf7-aac1-618cda7aaf0f',
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'size': 2,
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}
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snapshot_cifs = {
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@ -103,6 +104,7 @@ snapshot_cifs = {
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'share': share_cifs,
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'provider_location': '/snapshots/f5cadaf2-afbe-4cc4-9021-85491b6b76f7/'
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'91bc6e1b-1ba5-f29c-abc1-da7618cabf0a',
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'size': 2,
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}
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manage_snapshot = {
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@ -834,6 +836,7 @@ class HitachiHNASTestCase(test.TestCase):
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'qos': False,
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'thin_provisioning': True,
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'dedupe': True,
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'revert_to_snapshot_support': True,
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}
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self.mock_object(ssh.HNASSSHBackend, 'get_stats', mock.Mock(
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@ -898,3 +901,35 @@ class HitachiHNASTestCase(test.TestCase):
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def test_unmanage_snapshot(self):
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self._driver.unmanage_snapshot(snapshot_nfs)
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self.assertTrue(self.mock_log.info.called)
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@ddt.data({'snap': snapshot_nfs, 'exc': None},
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{'snap': snapshot_cifs, 'exc': None},
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{'snap': snapshot_nfs,
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'exc': exception.HNASNothingToCloneException('fake')},
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{'snap': snapshot_cifs,
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'exc': exception.HNASNothingToCloneException('fake')})
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@ddt.unpack
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def test_revert_to_snapshot(self, exc, snap):
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self.mock_object(driver.HitachiHNASDriver, "_check_fs_mounted")
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self.mock_object(ssh.HNASSSHBackend, 'tree_delete')
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self.mock_object(ssh.HNASSSHBackend, 'vvol_create')
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self.mock_object(ssh.HNASSSHBackend, 'quota_add')
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self.mock_object(ssh.HNASSSHBackend, 'tree_clone',
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mock.Mock(side_effect=exc))
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self._driver.revert_to_snapshot('context', snap, None)
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driver.HitachiHNASDriver._check_fs_mounted.assert_called_once_with()
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ssh.HNASSSHBackend.tree_delete.assert_called_once_with(
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'/'.join(('/shares', snap['share_id'])))
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ssh.HNASSSHBackend.vvol_create.assert_called_once_with(
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snap['share_id'])
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ssh.HNASSSHBackend.quota_add.assert_called_once_with(
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snap['share_id'], 2)
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ssh.HNASSSHBackend.tree_clone.assert_called_once_with(
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'/'.join(('/snapshots', snap['share_id'], snap['id'])),
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'/'.join(('/shares', snap['share_id'])))
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if exc:
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self.assertTrue(self.mock_log.warning.called)
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self.assertTrue(self.mock_log.info.called)
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@ -0,0 +1,9 @@
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---
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features:
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- Added Revert-to-snapshot functionality to Hitachi NAS driver.
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upgrades:
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- If using existing share types with the HNAS back end,
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set the 'revert_to_snapshot_support' extra-spec to allow
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creating shares that support in-place revert-to-snapshot
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functionality. This modification will not affect existing
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shares of such types.
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