tests/qemu-iotests/234

   1 #!/usr/bin/env python3
   2 # group: quick migration
   3 #
   4 # Copyright (C) 2018 Red Hat, Inc.
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 #
  19 # Creator/Owner: Kevin Wolf <kwolf@redhat.com>
  20 #
  21 # Check that block node activation and inactivation works with a block graph
  22 # that is built with individually created nodes
  23
  24 import iotests
  25 import os
  26
  27 iotests.script_initialize(supported_fmts=['qcow2'],
  28                           supported_platforms=['linux'])
  29
  30 with iotests.FilePath('img') as img_path, \
  31      iotests.FilePath('backing') as backing_path, \
  32      iotests.FilePath('mig_fifo_a') as fifo_a, \
  33      iotests.FilePath('mig_fifo_b') as fifo_b, \
  34      iotests.VM(path_suffix='a') as vm_a, \
  35      iotests.VM(path_suffix='b') as vm_b:
  36
  37     iotests.qemu_img_create('-f', iotests.imgfmt, backing_path, '64M')
  38     iotests.qemu_img_create('-f', iotests.imgfmt, img_path, '64M')
  39
  40     os.mkfifo(fifo_a)
  41     os.mkfifo(fifo_b)
  42
  43     iotests.log('Launching source VM...')
  44     (vm_a.add_blockdev('file,filename=%s,node-name=drive0-file' % (img_path))
  45          .add_blockdev('%s,file=drive0-file,node-name=drive0' % (iotests.imgfmt))
  46          .add_blockdev('file,filename=%s,node-name=drive0-backing-file' % (backing_path))
  47          .add_blockdev('%s,file=drive0-backing-file,node-name=drive0-backing' % (iotests.imgfmt))
  48          .launch())
  49
  50     vm_a.enable_migration_events('A')
  51
  52     iotests.log('Launching destination VM...')
  53     (vm_b.add_blockdev('file,filename=%s,node-name=drive0-file' % (img_path))
  54          .add_blockdev('%s,file=drive0-file,node-name=drive0' % (iotests.imgfmt))
  55          .add_blockdev('file,filename=%s,node-name=drive0-backing-file' % (backing_path))
  56          .add_blockdev('%s,file=drive0-backing-file,node-name=drive0-backing' % (iotests.imgfmt))
  57          .add_incoming("exec: cat '%s'" % (fifo_a))
  58          .launch())
  59
  60     vm_b.enable_migration_events('B')
  61
  62     # Add a child node that was created after the parent node. The reverse case
  63     # is covered by the -blockdev options above.
  64     iotests.log(vm_a.qmp('blockdev-snapshot', node='drive0-backing',
  65                          overlay='drive0'))
  66     iotests.log(vm_b.qmp('blockdev-snapshot', node='drive0-backing',
  67                          overlay='drive0'))
  68
  69     iotests.log('Starting migration to B...')
  70     iotests.log(vm_a.qmp('migrate', uri='exec:cat >%s' % (fifo_a)))
  71     with iotests.Timeout(3, 'Migration does not complete'):
  72         # Wait for the source first (which includes setup=setup)
  73         vm_a.wait_migration('postmigrate')
  74         # Wait for the destination second (which does not)
  75         vm_b.wait_migration('running')
  76
  77     iotests.log(vm_a.qmp('query-migrate')['return']['status'])
  78     iotests.log(vm_b.qmp('query-migrate')['return']['status'])
  79
  80     iotests.log(vm_a.qmp('query-status'))
  81     iotests.log(vm_b.qmp('query-status'))
  82
  83     iotests.log('Add a second parent to drive0-file...')
  84     iotests.log(vm_b.qmp('blockdev-add', driver='raw', file='drive0-file',
  85                          node_name='drive0-raw'))
  86
  87     iotests.log('Restart A with -incoming and second parent...')
  88     vm_a.shutdown()
  89     (vm_a.add_blockdev('raw,file=drive0-file,node-name=drive0-raw')
  90          .add_incoming("exec: cat '%s'" % (fifo_b))
  91          .launch())
  92
  93     vm_a.enable_migration_events('A')
  94
  95     iotests.log(vm_a.qmp('blockdev-snapshot', node='drive0-backing',
  96                          overlay='drive0'))
  97
  98     iotests.log('Starting migration back to A...')
  99     iotests.log(vm_b.qmp('migrate', uri='exec:cat >%s' % (fifo_b)))
 100     with iotests.Timeout(3, 'Migration does not complete'):
 101         # Wait for the source first (which includes setup=setup)
 102         vm_b.wait_migration('postmigrate')
 103         # Wait for the destination second (which does not)
 104         vm_a.wait_migration('running')
 105
 106     iotests.log(vm_a.qmp('query-migrate')['return']['status'])
 107     iotests.log(vm_b.qmp('query-migrate')['return']['status'])
 108
 109     iotests.log(vm_a.qmp('query-status'))
 110     iotests.log(vm_b.qmp('query-status'))