Public bug reported:
1. My environment:
nova: 2014.1, icehouse-stable
hypervisor: libvirt 1.2.1, + kvm
2. Relevant log files:
no
3. Reproduce steps:
* Launch one instance with default flavor m1.tiny which swap size is 0MB
* Resize instance from m1.tiny to flv_5_root_2_eph_1_swap which swap's size is
1MB,
and get swap info with 'virsh' commands
virsh # domblklist 30
vdc
/var/lib/nova/instances/fa13d27f-3ddd-48a5-86a8-aeaf04c2046d/disk.swap
virsh # domblkinfo 30 vdc
Capacity: 1048576
* Resize instance from flv_5_root_2_eph_1_swap to flv_40_root_5_eph_4_swap,
and get swap info with 'virsh' commands
Expected results:
*virsh # domblkinfo 5 vdc
Capacity: 4194304
Actual result:
* virsh # domblkinfo 5 vdc
Capacity: 1048576
4. Reason maybe:
nova.virt.libvirt.driver.py
def _create_image(self, context, instance,
disk_mapping, suffix='',
disk_images=None, network_info=None,
block_device_info=None, files=None,
admin_pass=None, inject_files=True,
fallback_from_host=None):
...
if 'disk.swap' in disk_mapping:
mapping = disk_mapping['disk.swap']
swap_mb = 0
swap = driver.block_device_info_get_swap(block_device_info)
if driver.swap_is_usable(swap):
swap_mb = swap['swap_size'] # use inst_type['swap']?
elif (inst_type['swap'] > 0 and
not block_device.volume_in_mapping(
mapping['dev'], block_device_info)):
swap_mb = inst_type['swap']
** Affects: nova
Importance: Undecided
Status: New
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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1447977
Title:
swap size not change after instance resized
Status in OpenStack Compute (Nova):
New
Bug description:
1. My environment:
nova: 2014.1, icehouse-stable
hypervisor: libvirt 1.2.1, + kvm
2. Relevant log files:
no
3. Reproduce steps:
* Launch one instance with default flavor m1.tiny which swap size is 0MB
* Resize instance from m1.tiny to flv_5_root_2_eph_1_swap which swap's size
is 1MB,
and get swap info with 'virsh' commands
virsh # domblklist 30
vdc
/var/lib/nova/instances/fa13d27f-3ddd-48a5-86a8-aeaf04c2046d/disk.swap
virsh # domblkinfo 30 vdc
Capacity: 1048576
* Resize instance from flv_5_root_2_eph_1_swap to flv_40_root_5_eph_4_swap,
and get swap info with 'virsh' commands
Expected results:
*virsh # domblkinfo 5 vdc
Capacity: 4194304
Actual result:
* virsh # domblkinfo 5 vdc
Capacity: 1048576
4. Reason maybe:
nova.virt.libvirt.driver.py
def _create_image(self, context, instance,
disk_mapping, suffix='',
disk_images=None, network_info=None,
block_device_info=None, files=None,
admin_pass=None, inject_files=True,
fallback_from_host=None):
...
if 'disk.swap' in disk_mapping:
mapping = disk_mapping['disk.swap']
swap_mb = 0
swap = driver.block_device_info_get_swap(block_device_info)
if driver.swap_is_usable(swap):
swap_mb = swap['swap_size'] # use inst_type['swap']?
elif (inst_type['swap'] > 0 and
not block_device.volume_in_mapping(
mapping['dev'], block_device_info)):
swap_mb = inst_type['swap']
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https://bugs.launchpad.net/nova/+bug/1447977/+subscriptions
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