async def namespace_observer(
*,
clusterwide: bool,
namespaces: Collection[references.NamespacePattern],
insights: references.Insights,
settings: configuration.OperatorSettings,
) -> None:
exact_namespaces = references.select_specific_namespaces(namespaces)
resource = await insights.backbone.wait_for(references.NAMESPACES)
# Populate the namespaces atomically (instead of notifying on every item from the watch-stream).
if not settings.scanning.disabled and not clusterwide:
try:
objs, _ = await fetching.list_objs(
settings=settings,
resource=resource,
namespace=None,
logger=logger,
)
async with insights.revised:
revise_namespaces(raw_bodies=objs,
insights=insights,
namespaces=namespaces)
insights.revised.notify_all()
except errors.APIForbiddenError:
logger.warning(
"Not enough permissions to list namespaces. "
"Falling back to a list of namespaces which are assumed to exist: "
f"{exact_namespaces!r}")
async with insights.revised:
insights.namespaces.update(exact_namespaces)
insights.revised.notify_all()
else:
async with insights.revised:
insights.namespaces.update(
{None} if clusterwide else exact_namespaces)
insights.revised.notify_all()
# Notify those waiting for the initial listing (e.g. CLI commands).
insights.ready_namespaces.set()
if not settings.scanning.disabled and not clusterwide:
try:
await queueing.watcher(settings=settings,
resource=resource,
namespace=None,
processor=functools.partial(
process_discovered_namespace_event,
namespaces=namespaces,
insights=insights))
except errors.APIForbiddenError:
logger.warning(
"Not enough permissions to watch for namespaces: "
"changes (deletion/creation) will not be noticed; "
"the namespaces are only refreshed on operator restarts.")
await asyncio.Event().wait()
else:
await asyncio.Event().wait()
def test_empty_pattern_list():
names = select_specific_namespaces([])
assert not names
def test_excluded_regexps():
names = select_specific_namespaces([re.compile(r'ns1')])
assert not names
def test_excluded_globs():
names = select_specific_namespaces(['n*s', 'n?s'])
assert not names
def test_excluded_multipatterns():
names = select_specific_namespaces(['ns1,ns2'])
assert not names
def test_included_exact_strings():
names = select_specific_namespaces(['ns2', 'ns1'])
assert names == {'ns1', 'ns2'}
def test_included_empty_string():
names = select_specific_namespaces([''])
assert names == {''}