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qemu-iotests: Extend non-shared storage migration test (194)

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This is the follow-up patch that was discussed[*] as part of feedback to
qemu-iotest 194.

Changes in this patch:

  - Supply 'job-id' parameter to `drive-mirror` invocation.

  - Once migration completes, issue QMP `block-job-cancel` command on
    the source QEMU to gracefully complete `drive-mirror` operation.

  - Once the BLOCK_JOB_COMPLETED event is emitted, stop the NBD server
    on the destination QEMU.

  - Check for both the events: MIGRATION and BLOCK_JOB_COMPLETED.

With the above, the test will also be (almost) in sync with the
procedure outlined in the document 'live-block-operations.rst'[+]
(section: "QMP invocation for live storage migration with
``drive-mirror`` + NBD").

[*] https://lists.nongnu.org/archive/html/qemu-devel/2017-08/msg04820.html
    -- qemu-iotests: add 194 non-shared storage migration test
[+] https://git.qemu.org/gitweb.cgi?p=qemu.git;a=blob;f=docs/interop/live-block-operations.rst

Signed-off-by: Kashyap Chamarthy <kchamart@redhat.com>
Message-Id: <20170829165058.8229-1-kchamart@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Kashyap Chamarthy 2017-08-29 18:50:58 +02:00 committed by Eric Blake
parent 1ab5eb4efb
commit 2c94e2714c
2 changed files with 25 additions and 9 deletions
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23
tests/qemu-iotests/194
View File

@ -46,16 +46,17 @@ iotests.log('Launching NBD server on destination...')
iotests.log(dest_vm.qmp('nbd-server-start', addr={'type': 'unix', 'data': {'path': nbd_sock_path}}))
iotests.log(dest_vm.qmp('nbd-server-add', device='drive0', writable=True))
iotests.log('Starting drive-mirror on source...')
iotests.log('Starting `drive-mirror` on source...')
iotests.log(source_vm.qmp(
'drive-mirror',
device='drive0',
target='nbd+unix:///drive0?socket={0}'.format(nbd_sock_path),
sync='full',
format='raw', # always raw, the server handles the format
mode='existing'))
mode='existing',
job_id='mirror-job0'))
iotests.log('Waiting for drive-mirror to complete...')
iotests.log('Waiting for `drive-mirror` to complete...')
iotests.log(source_vm.event_wait('BLOCK_JOB_READY'),
filters=[iotests.filter_qmp_event])
@ -67,7 +68,17 @@ dest_vm.qmp('migrate-set-capabilities',
iotests.log(source_vm.qmp('migrate', uri='unix:{0}'.format(migration_sock_path)))
while True:
event = source_vm.event_wait('MIGRATION')
iotests.log(event, filters=[iotests.filter_qmp_event])
if event['data']['status'] in ('completed', 'failed'):
event1 = source_vm.event_wait('MIGRATION')
iotests.log(event1, filters=[iotests.filter_qmp_event])
if event1['data']['status'] in ('completed', 'failed'):
iotests.log('Gracefully ending the `drive-mirror` job on source...')
iotests.log(source_vm.qmp('block-job-cancel', device='mirror-job0'))
break
while True:
event2 = source_vm.event_wait('BLOCK_JOB_COMPLETED')
iotests.log(event2, filters=[iotests.filter_qmp_event])
if event2['event'] == 'BLOCK_JOB_COMPLETED':
iotests.log('Stopping the NBD server on destination...')
iotests.log(dest_vm.qmp('nbd-server-stop'))
break

11
tests/qemu-iotests/194.out
View File

@ -2,12 +2,17 @@ Launching VMs...
Launching NBD server on destination...
{u'return': {}}
{u'return': {}}
Starting drive-mirror on source...
Starting `drive-mirror` on source...
{u'return': {}}
Waiting for drive-mirror to complete...
{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'device': u'drive0', u'type': u'mirror', u'speed': 0, u'len': 1073741824, u'offset': 1073741824}, u'event': u'BLOCK_JOB_READY'}
Waiting for `drive-mirror` to complete...
{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'device': u'mirror-job0', u'type': u'mirror', u'speed': 0, u'len': 1073741824, u'offset': 1073741824}, u'event': u'BLOCK_JOB_READY'}
Starting migration...
{u'return': {}}
{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'setup'}, u'event': u'MIGRATION'}
{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'active'}, u'event': u'MIGRATION'}
{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'completed'}, u'event': u'MIGRATION'}
Gracefully ending the `drive-mirror` job on source...
{u'return': {}}
{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'device': u'mirror-job0', u'type': u'mirror', u'speed': 0, u'len': 1073741824, u'offset': 1073741824}, u'event': u'BLOCK_JOB_COMPLETED'}
Stopping the NBD server on destination...
{u'return': {}}