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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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7
client-cli/cli_lib/vm.py
View File

@ -203,19 +203,20 @@ def vm_state(config, vm, target_state, wait=False):
return retstatus, response.json()['message']
def vm_node(config, vm, target_node, action, force=False, wait=False):
def vm_node(config, vm, target_node, action, force=False, wait=False, force_live=False):
"""
Modify the current node of VM via {action}
API endpoint: POST /vm/{vm}/node
API arguments: node={target_node}, action={action}, force={force}, wait={wait}
API arguments: node={target_node}, action={action}, force={force}, wait={wait}, force_live={force_live}
API schema: {"message":"{data}"}
"""
params={
'node': target_node,
'action': action,
'force': str(force).lower(),
'wait': str(wait).lower()
'wait': str(wait).lower(),
'force_live': str(force_live).lower()
}
response = call_api(config, 'post', '/vm/{vm}/node'.format(vm=vm), params=params)

24
client-cli/pvc.py
View File

@ -868,13 +868,17 @@ def vm_disable(domain):
'-w', '--wait', 'wait', is_flag=True, default=False,
help='Wait for migration to complete before returning.'
)
@click.option(
'--force-live', 'force_live', is_flag=True, default=False,
help='Do not fall back to shutdown-based migration if live migration fails.'
)
@cluster_req
def vm_move(domain, target_node, wait):
def vm_move(domain, target_node, wait, force_live):
"""
Permanently move virtual machine DOMAIN, via live migration if running and possible, to another node. DOMAIN may be a UUID or name.
"""
retcode, retmsg = pvc_vm.vm_node(config, domain, target_node, 'move', force=False, wait=wait)
retcode, retmsg = pvc_vm.vm_node(config, domain, target_node, 'move', force=False, wait=wait, force_live=force_live)
cleanup(retcode, retmsg)
###############################################################################
@ -896,13 +900,17 @@ def vm_move(domain, target_node, wait):
'-w', '--wait', 'wait', is_flag=True, default=False,
help='Wait for migration to complete before returning.'
)
@click.option(
'--force-live', 'force_live', is_flag=True, default=False,
help='Do not fall back to shutdown-based migration if live migration fails.'
)
@cluster_req
def vm_migrate(domain, target_node, force_migrate, wait):
def vm_migrate(domain, target_node, force_migrate, wait, force_live):
"""
Temporarily migrate running virtual machine DOMAIN, via live migration if possible, to another node. DOMAIN may be a UUID or name. If DOMAIN is not running, it will be started on the target node.
"""
retcode, retmsg = pvc_vm.vm_node(config, domain, target_node, 'migrate', force=force_migrate, wait=wait)
retcode, retmsg = pvc_vm.vm_node(config, domain, target_node, 'migrate', force=force_migrate, wait=wait, force_live=force_live)
cleanup(retcode, retmsg)
###############################################################################
@ -916,13 +924,17 @@ def vm_migrate(domain, target_node, force_migrate, wait):
'-w', '--wait', 'wait', is_flag=True, default=False,
help='Wait for migration to complete before returning.'
)
@click.option(
'--force-live', 'force_live', is_flag=True, default=False,
help='Do not fall back to shutdown-based migration if live migration fails.'
)
@cluster_req
def vm_unmigrate(domain, wait):
def vm_unmigrate(domain, wait, force_live):
"""
Restore previously migrated virtual machine DOMAIN, via live migration if possible, to its original node. DOMAIN may be a UUID or name. If DOMAIN is not running, it will be started on the target node.
"""
retcode, retmsg = pvc_vm.vm_node(config, domain, None, 'unmigrate', force=False, wait=wait)
retcode, retmsg = pvc_vm.vm_node(config, domain, None, 'unmigrate', force=False, wait=wait, force_live=force_live)
cleanup(retcode, retmsg)
###############################################################################