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Allow enforcement of live migration

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Provides a CLI and API argument to force live migration, which triggers
a new VM state "migrate-live". The node daemon VMInstance during migrate
will read this flag from the state and, if enforced, will not trigger a
shutdown migration.

Closes #95
This commit is contained in:
Joshua Boniface
2020-06-06 11:49:21 -04:00
parent b5434ba744
commit ce60836c34
6 changed files with 72 additions and 32 deletions
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21
daemon-common/vm.py
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@ -441,7 +441,7 @@ def disable_vm(zk_conn, domain):
return True, 'Marked VM "{}" as disable.'.format(domain)
def move_vm(zk_conn, domain, target_node, wait=False):
def move_vm(zk_conn, domain, target_node, wait=False, force_live=False):
# Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain)
if not dom_uuid:
@ -453,7 +453,10 @@ def move_vm(zk_conn, domain, target_node, wait=False):
# If the current state isn't start, preserve it; we're not doing live migration
target_state = current_state
else:
target_state = 'migrate'
if force_live:
target_state = 'migrate-live'
else:
target_state = 'migrate'
current_node = zkhandler.readdata(zk_conn, '/domains/{}/node'.format(dom_uuid))
@ -497,7 +500,7 @@ def move_vm(zk_conn, domain, target_node, wait=False):
return True, retmsg
def migrate_vm(zk_conn, domain, target_node, force_migrate, wait=False):
def migrate_vm(zk_conn, domain, target_node, force_migrate, wait=False, force_live=False):
# Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain)
if not dom_uuid:
@ -509,7 +512,10 @@ def migrate_vm(zk_conn, domain, target_node, force_migrate, wait=False):
# If the current state isn't start, preserve it; we're not doing live migration
target_state = current_state
else:
target_state = 'migrate'
if force_live:
target_state = 'migrate-live'
else:
target_state = 'migrate'
current_node = zkhandler.readdata(zk_conn, '/domains/{}/node'.format(dom_uuid))
last_node = zkhandler.readdata(zk_conn, '/domains/{}/lastnode'.format(dom_uuid))
@ -556,7 +562,7 @@ def migrate_vm(zk_conn, domain, target_node, force_migrate, wait=False):
return True, retmsg
def unmigrate_vm(zk_conn, domain, wait=False):
def unmigrate_vm(zk_conn, domain, wait=False, force_live=False):
# Validate that VM exists in cluster
dom_uuid = getDomainUUID(zk_conn, domain)
if not dom_uuid:
@ -568,7 +574,10 @@ def unmigrate_vm(zk_conn, domain, wait=False):
# If the current state isn't start, preserve it; we're not doing live migration
target_state = current_state
else:
target_state = 'migrate'
if force_live:
target_state = 'migrate-live'
else:
target_state = 'migrate'
target_node = zkhandler.readdata(zk_conn, '/domains/{}/lastnode'.format(dom_uuid))