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Prevent a VM migrating to the same node 

Prevents a rare edge case where a node can end up "migrating" to itself.
Quick hack to fix this, though like most of the VM management should
probably be rethought/rewritten later.

Fixes #92
This commit is contained in:
Joshua Boniface 2020-06-04 10:26:47 -04:00
parent 9ee5ae4826
commit 5d2031d99e
1 changed files with 10 additions and 0 deletions
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10
node-daemon/pvcnoded/VMInstance.py
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@ -108,6 +108,7 @@ class VMInstance(object):
self.domname = zkhandler.readdata(zk_conn, '/domains/{}'.format(domuuid)) self.domname = zkhandler.readdata(zk_conn, '/domains/{}'.format(domuuid))
self.state = zkhandler.readdata(self.zk_conn, '/domains/{}/state'.format(self.domuuid)) self.state = zkhandler.readdata(self.zk_conn, '/domains/{}/state'.format(self.domuuid))
self.node = zkhandler.readdata(self.zk_conn, '/domains/{}/node'.format(self.domuuid)) self.node = zkhandler.readdata(self.zk_conn, '/domains/{}/node'.format(self.domuuid))
self.lastnode = zkhandler.readdata(self.zkconn, '/domains/{}/lastnode'.format(self.domuuid))
try: try:
self.pinpolicy = zkhandler.readdata(self.zk_conn, '/domains/{}/pinpolicy'.format(self.domuuid)) self.pinpolicy = zkhandler.readdata(self.zk_conn, '/domains/{}/pinpolicy'.format(self.domuuid))
except: except:
@ -147,6 +148,9 @@ class VMInstance(object):
def getnode(self): def getnode(self):
return self.node return self.node
def getlastnode(self):
return self.lastnode
def getdom(self): def getdom(self):
return self.dom return self.dom
@ -368,6 +372,11 @@ class VMInstance(object):
# Migrate the VM to a target host # Migrate the VM to a target host
def migrate_vm(self): def migrate_vm(self):
# Don't try to migrate a node to itself, set back to start
if self.node == self.lastnode:
zkhandler.writedata(self.zk_conn, { '/domains/{}/state'.format(self.domuuid): 'start' })
return
self.inmigrate = True self.inmigrate = True
self.logger.out('Migrating VM to node "{}"'.format(self.node), state='i', prefix='Domain {}:'.format(self.domuuid)) self.logger.out('Migrating VM to node "{}"'.format(self.node), state='i', prefix='Domain {}:'.format(self.domuuid))
@ -469,6 +478,7 @@ class VMInstance(object):
# Update the current values from zookeeper # Update the current values from zookeeper
self.state = zkhandler.readdata(self.zk_conn, '/domains/{}/state'.format(self.domuuid)) self.state = zkhandler.readdata(self.zk_conn, '/domains/{}/state'.format(self.domuuid))
self.node = zkhandler.readdata(self.zk_conn, '/domains/{}/node'.format(self.domuuid)) self.node = zkhandler.readdata(self.zk_conn, '/domains/{}/node'.format(self.domuuid))
self.lastnode = zkhandler.readdata(self.zk_conn, '/domains/{}/lastnode'.format(self.domuuid))
# Check the current state of the VM # Check the current state of the VM
try: try: