use 'os_type' in ephemeral filename only if mkfs defined
Currently for undefined os-types it will use the default mkfs command, but use the meta 'os_type' in the name of the ephemeral file (e.g. ephemeral_20_abcdef). Which can result in a lot of files (DoS?) This change will only use 'os_type' in the ephemeral filename if there is a specific mkfs command defined, otherwise it will use 'default' (e.g. ephemeral_20_default) Modifed the tests to test for: os_type='' os_type=None os_type='test' - with no mkfs command specified os_type='test' - with a mkfs command specified Closes-Bug: 1253980 Backport of Original Change-Id: Ie4c10f99ce690c5e4ef181624bd688c38923855c to stable/grizzly Change-Id: Ia040910e90861a2987eff345ad1c01863655b124
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@ -2725,7 +2725,7 @@ class LibvirtConnTestCase(test.TestCase):
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self.assertTrue(self.cache_called_for_disk)
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db.instance_destroy(self.context, instance['uuid'])
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def test_create_image_plain(self):
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def _test_create_image_plain(self, os_type='', filename='', mkfs=False):
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gotFiles = []
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def fake_image(self, instance, name, image_type=''):
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@ -2760,11 +2760,15 @@ class LibvirtConnTestCase(test.TestCase):
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instance_ref = self.test_instance
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instance_ref['image_ref'] = 1
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instance = db.instance_create(self.context, instance_ref)
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instance['os_type'] = os_type
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conn = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), False)
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self.stubs.Set(conn, 'to_xml', fake_none)
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self.stubs.Set(conn, '_create_domain_and_network', fake_none)
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self.stubs.Set(conn, 'get_info', fake_get_info)
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if mkfs:
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self.stubs.Set(nova.virt.disk.api, '_MKFS_COMMAND',
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{os_type: 'mkfs.ext3 --label %(fs_label)s %(target)s'})
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image_meta = {'id': instance['image_ref']}
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disk_info = blockinfo.get_disk_info(CONF.libvirt_type,
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@ -2779,11 +2783,31 @@ class LibvirtConnTestCase(test.TestCase):
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wantFiles = [
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{'filename': '356a192b7913b04c54574d18c28d46e6395428ab',
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'size': 10 * 1024 * 1024 * 1024},
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{'filename': 'ephemeral_20_default',
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{'filename': filename,
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'size': 20 * 1024 * 1024 * 1024},
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]
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self.assertEquals(gotFiles, wantFiles)
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def test_create_image_plain_os_type_blank(self):
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self._test_create_image_plain(os_type='',
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filename='ephemeral_20_default',
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mkfs=False)
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def test_create_image_plain_os_type_none(self):
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self._test_create_image_plain(os_type=None,
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filename='ephemeral_20_default',
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mkfs=False)
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def test_create_image_plain_os_type_set_no_fs(self):
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self._test_create_image_plain(os_type='test',
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filename='ephemeral_20_default',
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mkfs=False)
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def test_create_image_plain_os_type_set_with_fs(self):
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self._test_create_image_plain(os_type='test',
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filename='ephemeral_20_test',
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mkfs=True)
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def test_create_image_with_swap(self):
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gotFiles = []
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@ -90,6 +90,10 @@ for s in CONF.virt_mkfs:
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_DEFAULT_MKFS_COMMAND = mkfs_command
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def get_fs_type_for_os_type(os_type):
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return os_type if _MKFS_COMMAND.get(os_type) else 'default'
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def mkfs(os_type, fs_label, target):
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mkfs_command = (_MKFS_COMMAND.get(os_type, _DEFAULT_MKFS_COMMAND) or
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'') % locals()
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@ -1826,9 +1826,8 @@ class LibvirtDriver(driver.ComputeDriver):
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project_id=instance['project_id'])
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# Lookup the filesystem type if required
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os_type_with_default = instance['os_type']
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if not os_type_with_default:
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os_type_with_default = 'default'
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os_type_with_default = disk.get_fs_type_for_os_type(
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instance['os_type'])
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ephemeral_gb = instance['ephemeral_gb']
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if 'disk.local' in disk_mapping:
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