Refactor how migrations work to allow unmigrate and avoid code duplication
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@ -112,52 +112,75 @@ class VMInstance:
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self.dom = None
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self.inshutdown = False
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# Migrate the VM to a target host
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def migrate_vm(self):
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print('>>> %s - Migrating VM to %s' % (self.domuuid, self.hypervisor))
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self.inmigrate = True
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former_hypervisor = self.thishypervisor.name
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def live_migrate_vm(self, dest_hypervisor):
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try:
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dest_conn = libvirt.open('qemu+tcp://%s/system' % self.hypervisor)
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if dest_conn == None:
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raise
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except:
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print('>>> %s - Failed to open connection to qemu+tcp://%s/system; aborting migration' % self.hypervisor)
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self.zk.set(self.zkey + '/hypervisor', former_hypervisor.encode('ascii'))
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self.zk.set(self.zkey + '/state', 'start'.encode('ascii'))
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return
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return 1
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try:
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target_dom = self.dom.migrate(dest_conn, libvirt.VIR_MIGRATE_LIVE, None, None, 0)
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if target_dom == None:
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raise
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# Set the former hypervisor to us
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self.zk.set(self.zkey + '/formerhypervisor', former_hypervisor.encode('ascii'))
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print('>>> %s - Migrated successfully' % self.domuuid)
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except:
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dest_conn.close()
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print('>>> %s - Could not live migrate VM' % self.domuuid)
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return 1
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dest_conn.close()
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return 0
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# Migrate the VM to a target host
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def migrate_vm(self):
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self.inmigrate = True
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this_hypervisor = self.thishypervisor.name
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new_hypervisor = self.hypervisor
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previous_hypervisor = self.zk.get(self.zkey + '/formerhypervisor')[0].decode('ascii')
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print('>>> %s - Migrating VM to %s' % (self.domuuid, new_hypervisor))
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migrate_ret = live_migrate_vm(new_hypervisor)
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if migrate_ret != 0:
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print('>>> %s - Could not live migrate VM; forcing away uncleanly' % self.domuuid)
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self.stop_vm()
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time.sleep(0.5)
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self.zk.set(self.zkey + '/state', 'start'.encode('ascii'))
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return
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else:
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try:
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self.thishypervisor.domain_list.remove(self.domuuid)
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except ValueError:
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pass
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try:
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self.thishypervisor.domain_list.remove(self.domuuid)
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except ValueError:
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pass
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dest_conn.close()
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self.inmigrate = False
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def unmigrate_vm(self):
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print('>>> %s - Unmigrating VM' % self.domuuid)
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former_hypervisor = self.zk.get(self.zkey + '/formerhypervisor')[0] # I don't decode this
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transaction = self.zk.transaction()
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transaction.set_data('/domains/' + self.domuuid + '/state', 'migrate'.encode('ascii'))
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transaction.set_data('/domains/' + self.domuuid + '/hypervisor', former_hypervisor)
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transaction.set_data('/domains/' + self.domuuid + '/formerhypervisor', ''.encode('ascii'))
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result = transaction.commit()
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self.inmigrate = True
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this_hypervisor = self.thishypervisor.name
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new_hypervisor = self.zk.get(self.zkey + '/formerhypervisor')[0].decode('ascii')
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if new_hypervisor != '':
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print('>>> %s - Unmigrating VM' % self.domuuid)
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transaction = self.zk.transaction()
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transaction.set_data('/domains/' + self.domuuid + '/hypervisor', new_hypervisor.encode('ascii'))
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transaction.set_data('/domains/' + self.domuuid + '/formerhypervisor', ''.encode('ascii'))
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result = transaction.commit()
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migrate_ret = live_migrate_vm(new_hypervisor)
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if migrate_ret != 0:
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print('>>> %s - Could not live migrate VM; forcing away uncleanly' % self.domuuid)
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self.stop_vm()
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time.sleep(0.5)
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return
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else:
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try:
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self.thishypervisor.domain_list.remove(self.domuuid)
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except ValueError:
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pass
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else:
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transaction.set_data('/domains/' + self.domuuid + '/state', 'start'.encode('ascii'))
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self.inmigrate = False
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# Receive the migration from another host (wait until VM is running)
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def receive_migrate(self):
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