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()
# 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
# is running, and exit if it's not.
# See if the libvirtd service is running, discarding all output.
# Non-zero exit code means it's not running.
if (subprocess.call(['/sbin/service','libvirtd','status'],
stdout=open(os.devnull, 'wb'),
stderr=subprocess.STDOUT) != 0):
sys.exit(0)
domain_list = poll_hypervisor()
else:
# If no libvirt nor vdsm is present, this program is pretty much
# useless. Just exit.
sys.exit(0)
# create the unkonwn domain config files (for libvirt only)
if libvirt and not vdsm_enabled:
uuid_list = list(domain_list.keys())
domain = DomainDirectory()
domain.save_unknown_domain_configs(uuid_list)
cached_state = PollerStateCache(domain_list,
debug = options and options.debug)
# Send notifications, if necessary.
_send_notifications(cached_state)
# Save the new state.
cached_state.save()
