def refresh(fail_on_error=False):
"""
Refreshes the virtualization info for this host and any subdomains on the
server.
"""
if _is_host_domain(fail_on_error):
domain_identity = IdentityType.HOST
my_uuid = _fetch_host_uuid()
else:
# Not a host. No-op.
return
# Now that we've gathered some preliminary information, create a plan of
# actions that we will eventually pass to the server.
plan = Plan()
# First, declare our own existence.
plan.add(
EventType.EXISTS,
TargetType.SYSTEM,
{ PropertyType.IDENTITY : domain_identity,
PropertyType.UUID : my_uuid })
# Now, crawl each of the domains on this host.
if vdsm_enabled:
server = localvdsm.connect()
domains = poller.poll_through_vdsm(server)
else:
domains = poller.poll_hypervisor()
if not len(domains) and libvirt.openReadOnly(None).getType() == 'Xen':
# On a KVM/QEMU host, libvirt reports no domain entry for host itself
# On a Xen host, either there were no domains or xend might not be
# running. Don't proceed further.
return
domain_list = list(domains.values())
domain_uuids = list(domains.keys())
if not vdsm_enabled:
# We need this only for libvirt
domain_dir = DomainDirectory()
domain_dir.save_unknown_domain_configs(domain_uuids)
plan.add(EventType.CRAWL_BEGAN, TargetType.SYSTEM)
for domain_properties in domain_list:
plan.add(EventType.EXISTS, TargetType.DOMAIN, domain_properties)
plan.add(EventType.CRAWL_ENDED, TargetType.SYSTEM)
# Finally, execute the actions queued up in the plan.
plan.execute()
def refresh(fail_on_error=False):
"""
Refreshes the virtualization info for this host and any subdomains on the
server.
"""
if _is_host_domain(fail_on_error):
domain_identity = IdentityType.HOST
my_uuid = _fetch_host_uuid()
else:
# Not a host. No-op.
return
# Now that we've gathered some preliminary information, create a plan of
# actions that we will eventually pass to the server.
plan = Plan()
# First, declare our own existence.
plan.add(
EventType.EXISTS,
TargetType.SYSTEM,
{ PropertyType.IDENTITY : domain_identity,
PropertyType.UUID : my_uuid })
# Now, crawl each of the domains on this host.
if vdsm_enabled:
server = localvdsm.connect()
domains = poller.poll_through_vdsm(server)
else:
domains = poller.poll_hypervisor()
if not len(domains) and libvirt.openReadOnly(None).getType() == 'Xen':
# On a KVM/QEMU host, libvirt reports no domain entry for host itself
# On a Xen host, either there were no domains or xend might not be
# running. Don't proceed further.
return
domain_list = list(domains.values())
domain_uuids = list(domains.keys())
if not vdsm_enabled:
# We need this only for libvirt
domain_dir = DomainDirectory()
domain_dir.save_unknown_domain_configs(domain_uuids)
plan.add(EventType.CRAWL_BEGAN, TargetType.SYSTEM)
for domain_properties in domain_list:
plan.add(EventType.EXISTS, TargetType.DOMAIN, domain_properties)
plan.add(EventType.CRAWL_ENDED, TargetType.SYSTEM)
# Finally, execute the actions queued up in the plan.
plan.execute()
# First, handle the options.
_parse_options()
vdsm_enabled = False
server = None
try:
from virtualization import localvdsm
if sys.version_info[0] == 3:
status, msg = subprocess.getstatusoutput("/etc/init.d/vdsmd status")
else:
import commands
status, msg = commands.getstatusoutput("/etc/init.d/vdsmd status")
if status == 0:
server = localvdsm.connect()
vdsm_enabled = True
except ImportError:
pass
# Crawl each of the domains on this host and obtain the new state.
if vdsm_enabled:
domain_list = poll_through_vdsm(server)
elif libvirt:
# If libvirt is present but not running, this program is useless.
# Libvirt currently writes to stderr if you attempt to connect
# and the daemon is not running. The libvirt python bindings provide
# no way to change this behavior. Anything written to stderr or stdout
# will cause cron to email root with the output. It is not our
# job to nag the user every two minutes if libvirt is not running.
# The only way to avoid this is to shell out to check if libvirt
