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Support per-VM migration type selectors

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Allow a VM to specify its migration type as a default choice. The valid
options are "default" (i.e. behave as now), "live" which forces a live
migration only, and "shutdown" which forces a shutdown migration only.
The new option is treated as a VM meta option and is set to default if
not found.
This commit is contained in:
Joshua Boniface
2020-10-29 11:31:32 -04:00
parent d2c0d868c4
commit ec0b8acf90
11 changed files with 236 additions and 61 deletions
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38
node-daemon/pvcnoded/VMInstance.py
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@ -113,7 +113,11 @@ class VMInstance(object):
try:
self.pinpolicy = zkhandler.readdata(self.zk_conn, '/domains/{}/pinpolicy'.format(self.domuuid))
except:
self.pinpolicy = "None"
self.pinpolicy = "none"
try:
self.migration_method = zkhandler.readdata(self.zk_conn, '/domains/{}/migration_method'.format(self.domuuid))
except:
self.migration_method = 'none'
# These will all be set later
self.instart = False
@ -349,11 +353,16 @@ class VMInstance(object):
zkhandler.writedata(self.zk_conn, { '/domains/{}/state'.format(self.domuuid): 'start' })
# Migrate the VM to a target host
def migrate_vm(self, force_live=False):
def migrate_vm(self, force_live=False, force_shutdown=False):
# Wait for any previous migration
while self.inmigrate:
time.sleep(0.1)
if self.migration_method == 'live':
force_live = True
elif self.migration_method == 'shutdown':
force_shutdown = True
self.inmigrate = True
self.logger.out('Migrating VM to node "{}"'.format(self.node), state='i', prefix='Domain {}'.format(self.domuuid))
@ -466,17 +475,20 @@ class VMInstance(object):
abort_migrate('Target node changed during preparation')
return
# A live migrate is attemped 3 times in succession
ticks = 0
while True:
ticks += 1
self.logger.out('Attempting live migration try {}'.format(ticks), state='i', prefix='Domain {}'.format(self.domuuid))
migrate_live_result = migrate_live()
if migrate_live_result:
break
time.sleep(0.5)
if ticks > 2:
break
if not force_shutdown:
# A live migrate is attemped 3 times in succession
ticks = 0
while True:
ticks += 1
self.logger.out('Attempting live migration try {}'.format(ticks), state='i', prefix='Domain {}'.format(self.domuuid))
migrate_live_result = migrate_live()
if migrate_live_result:
break
time.sleep(0.5)
if ticks > 2:
break
else:
migrate_live_result = False
if not migrate_live_result:
if force_live: