class ConfigServer:
def __init__(self, app_ctx: Mapping[str, Any], etcd_addr: HostPortPair,
etcd_user: Optional[str], etcd_password: Optional[str],
namespace: str) -> None:
# WARNING: importing etcd3/grpc must be done after forks.
from ai.backend.common.etcd import AsyncEtcd
self.context = app_ctx
credentials = None
if etcd_user:
credentials = {
'user': etcd_user,
'password': etcd_password,
}
scope_prefix_map = {
ConfigScopes.GLOBAL: '',
# TODO: provide a way to specify other scope prefixes
}
self.etcd = AsyncEtcd(etcd_addr,
namespace,
scope_prefix_map,
credentials=credentials)
async def close(self) -> None:
await self.etcd.close()
async def get(self, key: str, allow_null: bool = True) -> Optional[str]:
value = await self.etcd.get(key)
if value is None:
value = config_defaults.get(key, None)
if not allow_null and value is None:
raise ServerMisconfiguredError(
'A required etcd config is missing.', key)
return value
async def register_myself(self) -> None:
instance_id = await get_instance_id()
manager_info = {
f'nodes/manager/{instance_id}': 'up',
}
await self.etcd.put_dict(manager_info)
async def deregister_myself(self) -> None:
instance_id = await get_instance_id()
await self.etcd.delete_prefix(f'nodes/manager/{instance_id}')
async def update_aliases_from_file(self, file: Path) -> None:
log.info('Updating image aliases from "{0}"', file)
try:
data = yaml.load(open(file, 'r', encoding='utf-8'))
except IOError:
log.error('Cannot open "{0}".', file)
return
for item in data['aliases']:
alias = item[0]
target = item[1]
await self.etcd.put(f'images/_aliases/{etcd_quote(alias)}', target)
print(f'{alias} -> {target}')
log.info('Done.')
async def _scan_reverse_aliases(self) -> Mapping[str, List[str]]:
aliases = await self.etcd.get_prefix('images/_aliases')
result: DefaultDict[str, List[str]] = defaultdict(list)
for key, value in aliases.items():
result[value].append(etcd_unquote(key))
return dict(result)
async def _parse_image(self, image_ref, item, reverse_aliases):
installed = (await self.context['redis_image'].scard(
image_ref.canonical)) > 0
installed_agents = await self.context['redis_image'].smembers(
image_ref.canonical)
res_limits = []
for slot_key, slot_range in item['resource'].items():
min_value = slot_range.get('min')
if min_value is None:
min_value = Decimal(0)
max_value = slot_range.get('max')
if max_value is None:
max_value = Decimal('Infinity')
res_limits.append({
'key': slot_key,
'min': min_value,
'max': max_value,
})
accels = item.get('accelerators')
if accels is None:
accels = []
else:
accels = accels.split(',')
return {
'name': image_ref.name,
'humanized_name': image_ref.name, # TODO: implement
'tag': image_ref.tag,
'registry': image_ref.registry,
'digest': item[''],
'labels': item.get('labels', {}),
'aliases': reverse_aliases.get(image_ref.canonical, []),
'size_bytes': item.get('size_bytes', 0),
'resource_limits': res_limits,
'supported_accelerators': accels,
'installed': installed,
'installed_agents': installed_agents,
}
async def _check_image(self, reference: str) -> ImageRef:
known_registries = await get_known_registries(self.etcd)
ref = ImageRef(reference, known_registries)
digest = await self.etcd.get(ref.tag_path)
if digest is None:
raise UnknownImageReference(reference)
return ref
async def inspect_image(
self, reference: Union[str, ImageRef]) -> Mapping[str, Any]:
if isinstance(reference, str):
ref = await ImageRef.resolve_alias(reference, self.etcd)
else:
ref = reference
reverse_aliases = await self._scan_reverse_aliases()
image_info = await self.etcd.get_prefix(ref.tag_path)
if not image_info:
raise UnknownImageReference(reference)
return await self._parse_image(ref, image_info, reverse_aliases)
async def forget_image(self, reference: Union[str, ImageRef]) -> None:
if isinstance(reference, str):
ref = await ImageRef.resolve_alias(reference, self.etcd)
else:
ref = reference
await self.etcd.delete_prefix(ref.tag_path)
async def list_images(self) -> Sequence[Mapping[str, Any]]:
known_registries = await get_known_registries(self.etcd)
reverse_aliases = await self._scan_reverse_aliases()
data = await self.etcd.get_prefix('images')
coros = []
for registry, images in data.items():
if registry == '_aliases':
continue
for image, tags in images.items():
if image == '':
continue
if tags == '1':
continue
for tag, image_info in tags.items():
if tag == '':
continue
raw_ref = f'{etcd_unquote(registry)}/{etcd_unquote(image)}:{tag}'
ref = ImageRef(raw_ref, known_registries)
coros.append(
self._parse_image(ref, image_info, reverse_aliases))
result = await asyncio.gather(*coros)
return result
async def set_image_resource_limit(self, reference: str, slot_type: str,
value_range: Tuple[Optional[Decimal],
Optional[Decimal]]):
ref = await self._check_image(reference)
if value_range[0] is not None:
await self.etcd.put(f'{ref.tag_path}/resource/{slot_type}/min',
str(value_range[0]))
if value_range[1] is not None:
await self.etcd.put(f'{ref.tag_path}/resource/{slot_type}/max',
str(value_range[1]))
async def _rescan_images_single_registry(
self,
registry_name: str,
registry_info: Mapping[str, str],
reporter: ProgressReporter = None,
) -> None:
all_updates = {}
base_hdrs = {
'Accept': 'application/vnd.docker.distribution.manifest.v2+json',
}
registry_url = yarl.URL(registry_info[''])
registry_type = registry_info.get('type', 'docker')
registry_project = registry_info.get('project')
credentials = {}
username = registry_info.get('username')
if username is not None:
credentials['username'] = username
password = registry_info.get('password')
if password is not None:
credentials['password'] = password
non_kernel_words = (
'common-',
'commons-',
'base-',
'krunner',
'builder',
'backendai',
'geofront',
)
async def _scan_image(sess, image):
rqst_args = await registry_login(sess, registry_url, credentials,
f'repository:{image}:pull')
rqst_args['headers'].update(**base_hdrs)
tags = []
tag_list_url = (registry_url / f'v2/{image}/tags/list').with_query(
{'n': '10'}, )
while tag_list_url is not None:
async with sess.get(tag_list_url, **rqst_args) as resp:
data = json.loads(await resp.read())
if 'tags' in data:
# sometimes there are dangling image names in the hub.
tags.extend(data['tags'])
tag_list_url = None
next_page_link = resp.links.get('next')
if next_page_link:
next_page_url = next_page_link['url']
tag_list_url = (registry_url.with_path(
next_page_url.path).with_query(
next_page_url.query))
scheduler = await aiojobs.create_scheduler(limit=4)
try:
if reporter:
reporter.total_progress += len(tags)
jobs = await asyncio.gather(*[
scheduler.spawn(_scan_tag(sess, rqst_args, image, tag))
for tag in tags
])
await asyncio.gather(*[job.wait() for job in jobs])
finally:
await scheduler.close()
async def _scan_tag(sess, rqst_args, image, tag):
config_digest = None
labels = {}
skip_reason = None
try:
async with sess.get(
registry_url / f'v2/{image}/manifests/{tag}',
**rqst_args) as resp:
if resp.status == 404:
# ignore missing tags
# (may occur after deleting an image from the docker hub)
skip_reason = "missing/deleted"
return
resp.raise_for_status()
data = await resp.json()
config_digest = data['config']['digest']
size_bytes = (sum(layer['size']
for layer in data['layers']) +
data['config']['size'])
async with sess.get(
registry_url / f'v2/{image}/blobs/{config_digest}',
**rqst_args) as resp:
# content-type may not be json...
resp.raise_for_status()
data = json.loads(await resp.read())
if 'container_config' in data:
raw_labels = data['container_config']['Labels']
if raw_labels:
labels.update(raw_labels)
else:
raw_labels = data['config']['Labels']
if raw_labels:
labels.update(raw_labels)
if 'ai.backend.kernelspec' not in labels:
# Skip non-Backend.AI kernel images
skip_reason = "missing kernelspec"
return
if not (MIN_KERNELSPEC <= int(labels['ai.backend.kernelspec'])
<= MAX_KERNELSPEC):
# Skip unsupported kernelspec images
skip_reason = "unsupported kernelspec"
return
updates = {}
updates[f'images/{etcd_quote(registry_name)}/'
f'{etcd_quote(image)}'] = '1'
tag_prefix = f'images/{etcd_quote(registry_name)}/' \
f'{etcd_quote(image)}/{tag}'
updates[tag_prefix] = config_digest
updates[f'{tag_prefix}/size_bytes'] = size_bytes
for k, v in labels.items():
updates[f'{tag_prefix}/labels/{k}'] = v
accels = labels.get('ai.backend.accelerators')
if accels:
updates[f'{tag_prefix}/accels'] = accels
res_prefix = 'ai.backend.resource.min.'
for k, v in filter(lambda pair: pair[0].startswith(res_prefix),
labels.items()):
res_key = k[len(res_prefix):]
updates[f'{tag_prefix}/resource/{res_key}/min'] = v
all_updates.update(updates)
finally:
if skip_reason:
log.warning('Skipped image - {}:{} ({})', image, tag,
skip_reason)
progress_msg = f"Skipped {image}:{tag} ({skip_reason})"
else:
log.info('Updated image - {0}:{1}', image, tag)
progress_msg = f"Updated {image}:{tag}"
if reporter:
await reporter.update(1, message=progress_msg)
ssl_ctx = None # default
app_config = self.context.get('config')
if app_config is not None and not app_config['docker-registry'][
'ssl-verify']:
ssl_ctx = False
connector = aiohttp.TCPConnector(ssl=ssl_ctx)
async with aiohttp.ClientSession(connector=connector) as sess:
images: List[str] = []
if registry_url.host is not None and registry_url.host.endswith(
'.docker.io'):
# We need some special treatment for the Docker Hub.
params = {'page_size': '30'}
username = await self.etcd.get(
f'config/docker/registry/{etcd_quote(registry_name)}/username'
)
hub_url = yarl.URL('https://hub.docker.com')
repo_list_url: Optional[yarl.URL]
repo_list_url = hub_url / f'v2/repositories/{username}/'
while repo_list_url is not None:
async with sess.get(repo_list_url, params=params) as resp:
if resp.status == 200:
data = await resp.json()
images.extend(
f"{username}/{item['name']}"
for item in data['results']
# a little optimization to ignore legacies
if not item['name'].startswith('kernel-'))
else:
log.error(
'Failed to fetch repository list from {0} '
'(status={1})', repo_list_url, resp.status)
break
repo_list_url = None
next_page_link = data.get('next', None)
if next_page_link:
next_page_url = yarl.URL(next_page_link)
repo_list_url = (hub_url.with_path(
next_page_url.path).with_query(
next_page_url.query))
elif registry_type == 'docker':
# In other cases, try the catalog search.
rqst_args = await registry_login(sess, registry_url,
credentials,
'registry:catalog:*')
catalog_url: Optional[yarl.URL]
catalog_url = (registry_url / 'v2/_catalog').with_query(
{'n': '30'})
while catalog_url is not None:
async with sess.get(catalog_url, **rqst_args) as resp:
if resp.status == 200:
data = json.loads(await resp.read())
images.extend(data['repositories'])
log.debug('found {} repositories', len(images))
else:
log.warning(
'Docker registry {0} does not allow/support '
'catalog search. (status={1})', registry_url,
resp.status)
break
catalog_url = None
next_page_link = resp.links.get('next')
if next_page_link:
next_page_url = next_page_link['url']
catalog_url = (registry_url.with_path(
next_page_url.path).with_query(
next_page_url.query))
elif registry_type == 'harbor':
if credentials:
rqst_args = {
'auth':
aiohttp.BasicAuth(credentials['username'],
credentials['password'])
}
else:
rqst_args = {}
project_list_url: Optional[yarl.URL]
project_list_url = (registry_url / 'api/projects').with_query(
{'page_size': '30'})
project_id = None
while project_list_url is not None:
async with sess.get(project_list_url, **rqst_args) as resp:
projects = await resp.json()
for item in projects:
if item['name'] == registry_project:
project_id = item['project_id']
break
project_list_url = None
next_page_link = resp.links.get('next')
if next_page_link:
next_page_url = next_page_link['url']
project_list_url = (registry_url.with_path(
next_page_url.path).with_query(
next_page_url.query))
if project_id is None:
log.warning('There is no given project.')
return
repo_list_url = (registry_url / 'api/repositories').with_query(
{
'project_id': project_id,
'page_size': '30'
})
while repo_list_url is not None:
async with sess.get(repo_list_url, **rqst_args) as resp:
items = await resp.json()
repos = [item['name'] for item in items]
images.extend(repos)
repo_list_url = None
next_page_link = resp.links.get('next')
if next_page_link:
next_page_url = next_page_link['url']
repo_list_url = (registry_url.with_path(
next_page_url.path).with_query(
next_page_url.query))
else:
log.error('Unsupported registry type')
return
scheduler = await aiojobs.create_scheduler(limit=4)
try:
spawn_tasks = [
scheduler.spawn(_scan_image(sess, image))
for image in images if not any(
(w in image)
for w in non_kernel_words) # skip non-kernel images
]
if spawn_tasks:
fetch_jobs = await asyncio.gather(*spawn_tasks)
await asyncio.gather(*[job.wait() for job in fetch_jobs])
finally:
await scheduler.close()
if not all_updates:
log.info('No images found in registry {0}', registry_url)
return
for kvlist in chunked(sorted(all_updates.items()), 16):
await self.etcd.put_dict(dict(kvlist))
async def rescan_images(self,
registry: str = None,
*,
reporter: ProgressReporter = None) -> None:
if registry is None:
registries = []
data = await self.etcd.get_prefix('config/docker/registry')
for key, val in data.items():
if key:
registries.append(etcd_unquote(key))
else:
registries = [registry]
coros = []
for registry in registries:
log.info('Scanning kernel images from the registry "{0}"',
registry)
registry_info = await self.etcd.get_prefix(
f'config/docker/registry/{etcd_quote(registry)}')
if not registry_info:
log.error('Unknown registry: "{0}"', registry)
continue
coros.append(
self._rescan_images_single_registry(registry, registry_info,
reporter))
await asyncio.gather(*coros)
# TODO: delete images removed from registry?
async def alias(self, alias: str, target: str) -> None:
await self.etcd.put(f'images/_aliases/{etcd_quote(alias)}', target)
async def dealias(self, alias: str) -> None:
await self.etcd.delete(f'images/_aliases/{etcd_quote(alias)}')
async def update_volumes_from_file(self, file: Path) -> None:
log.info('Updating network volumes from "{0}"', file)
try:
data = yaml.load(open(file, 'r', encoding='utf-8'))
except IOError:
log.error('Cannot open "{0}".', file)
return
for item in data['volumes']:
name = item['name']
updates = {
f'volumes/{name}/mount/{k}': v
for k, v in item['mount'].items()
}
await self.etcd.put_dict(updates)
log.info('done')
async def update_resource_slots(
self,
slot_key_and_units: Mapping[SlotName, SlotTypes],
) -> None:
updates = {}
known_slots = await self.get_resource_slots()
for k, v in slot_key_and_units.items():
if k not in known_slots or v != known_slots[k]:
updates[f'config/resource_slots/{k}'] = v.value
if updates:
await self.etcd.put_dict(updates)
async def update_manager_status(self, status) -> None:
await self.etcd.put('manager/status', status.value)
self.get_manager_status.cache_clear()
@aiotools.lru_cache(maxsize=1, expire_after=2.0)
async def _get_resource_slots(self):
raw_data = await self.etcd.get_prefix_dict('config/resource_slots')
return {SlotName(k): SlotTypes(v) for k, v in raw_data.items()}
async def get_resource_slots(self) -> Mapping[SlotName, SlotTypes]:
'''
Returns the system-wide known resource slots and their units.
'''
try:
ret = current_resource_slots.get()
except LookupError:
configured_slots = await self._get_resource_slots()
ret = {**INTRINSIC_SLOTS, **configured_slots}
current_resource_slots.set(ret)
return ret
@aiotools.lru_cache(maxsize=1, expire_after=2.0)
async def _get_vfolder_types(self):
return await self.etcd.get_prefix_dict('volumes/_types')
async def get_vfolder_types(self) -> Sequence[str]:
'''
Returns the vfolder types currently set. One of "user" and/or "group".
If none is specified, "user" type is implicitly assumed.
'''
try:
ret = current_vfolder_types.get()
except LookupError:
vf_types = await self._get_vfolder_types()
if not vf_types:
vf_types = {'user': ''}
ret = list(vf_types.keys())
current_vfolder_types.set(ret)
return ret
@aiotools.lru_cache(maxsize=1, expire_after=5.0)
async def get_manager_nodes_info(self):
return await self.etcd.get_prefix_dict('nodes/manager')
@aiotools.lru_cache(maxsize=1, expire_after=2.0)
async def get_manager_status(self):
status = await self.etcd.get('manager/status')
if status is None:
return None
return ManagerStatus(status)
async def watch_manager_status(self):
async with aiotools.aclosing(
self.etcd.watch('manager/status')) as agen:
async for ev in agen:
yield ev
# TODO: refactor using contextvars in Python 3.7 so that the result is cached
# in a per-request basis.
@aiotools.lru_cache(maxsize=1, expire_after=2.0)
async def get_allowed_origins(self):
return await self.get('config/api/allow-origins')
# TODO: refactor using contextvars in Python 3.7 so that the result is cached
# in a per-request basis.
@aiotools.lru_cache(expire_after=60.0)
async def get_image_slot_ranges(self, image_ref: ImageRef):
'''
Returns the minimum and maximum ResourceSlot values.
All slot values are converted and normalized to Decimal.
'''
data = await self.etcd.get_prefix_dict(image_ref.tag_path)
slot_units = await self.get_resource_slots()
min_slot = ResourceSlot()
max_slot = ResourceSlot()
for slot_key, slot_range in data['resource'].items():
slot_unit = slot_units.get(slot_key)
if slot_unit is None:
# ignore unknown slots
continue
min_value = slot_range.get('min')
if min_value is None:
min_value = Decimal(0)
max_value = slot_range.get('max')
if max_value is None:
max_value = Decimal('Infinity')
if slot_unit == 'bytes':
if not isinstance(min_value, Decimal):
min_value = BinarySize.from_str(min_value)
if not isinstance(max_value, Decimal):
max_value = BinarySize.from_str(max_value)
else:
if not isinstance(min_value, Decimal):
min_value = Decimal(min_value)
if not isinstance(max_value, Decimal):
max_value = Decimal(max_value)
min_slot[slot_key] = min_value
max_slot[slot_key] = max_value
# fill missing
for slot_key in slot_units.keys():
if slot_key not in min_slot:
min_slot[slot_key] = Decimal(0)
if slot_key not in max_slot:
max_slot[slot_key] = Decimal('Infinity')
return min_slot, max_slot
class SharedConfig(AbstractConfig):
def __init__(self, app_ctx: Mapping[str, Any], etcd_addr: HostPortPair,
etcd_user: Optional[str], etcd_password: Optional[str],
namespace: str) -> None:
# WARNING: importing etcd3/grpc must be done after forks.
super().__init__()
self.context = app_ctx
credentials = None
if etcd_user:
credentials = {
'user': etcd_user,
'password': etcd_password,
}
scope_prefix_map = {
ConfigScopes.GLOBAL: '',
# TODO: provide a way to specify other scope prefixes
}
self.etcd = AsyncEtcd(etcd_addr,
namespace,
scope_prefix_map,
credentials=credentials)
async def close(self) -> None:
await self.etcd.close()
async def reload(self) -> None:
raw_cfg = await self.etcd.get_prefix('config')
try:
cfg = shared_config_iv.check(raw_cfg)
except config.ConfigurationError as e:
print('Validation of shared etcd configuration has failed:',
file=sys.stderr)
print(pformat(e.invalid_data), file=sys.stderr)
raise click.Abort()
else:
self.data = cfg
def __hash__(self) -> int:
# When used as a key in dicts, we don't care our contents.
# Just treat it lke an opaque object.
return hash(id(self))
async def get_raw(self,
key: str,
allow_null: bool = True) -> Optional[str]:
value = await self.etcd.get(key)
if value is None:
value = shared_config_defaults.get(key, None)
if not allow_null and value is None:
raise ServerMisconfiguredError(
'A required etcd config is missing.', key)
return value
async def register_myself(self) -> None:
instance_id = await get_instance_id()
manager_info = {
f'nodes/manager/{instance_id}': 'up',
}
await self.etcd.put_dict(manager_info)
async def deregister_myself(self) -> None:
instance_id = await get_instance_id()
await self.etcd.delete_prefix(f'nodes/manager/{instance_id}')
async def update_aliases_from_file(self, file: Path) -> None:
log.info('Updating image aliases from "{0}"', file)
try:
data = yaml.load(open(file, 'r', encoding='utf-8'))
except IOError:
log.error('Cannot open "{0}".', file)
return
for item in data['aliases']:
alias = item[0]
target = item[1]
await self.etcd.put(f'images/_aliases/{etcd_quote(alias)}', target)
print(f'{alias} -> {target}')
log.info('Done.')
async def _scan_reverse_aliases(self) -> Mapping[str, List[str]]:
aliases = await self.etcd.get_prefix('images/_aliases')
result: DefaultDict[str, List[str]] = defaultdict(list)
for key, value in aliases.items():
result[value].append(etcd_unquote(key))
return dict(result)
async def _parse_image(self, image_ref, item, reverse_aliases):
installed = (await self.context['redis_image'].scard(
image_ref.canonical)) > 0
installed_agents = await self.context['redis_image'].smembers(
image_ref.canonical)
res_limits = []
for slot_key, slot_range in item['resource'].items():
min_value = slot_range.get('min')
if min_value is None:
min_value = Decimal(0)
max_value = slot_range.get('max')
if max_value is None:
max_value = Decimal('Infinity')
res_limits.append({
'key': slot_key,
'min': min_value,
'max': max_value,
})
accels = item.get('accelerators')
if accels is None:
accels = []
else:
accels = accels.split(',')
return {
'name': image_ref.name,
'humanized_name': image_ref.name, # TODO: implement
'tag': image_ref.tag,
'registry': image_ref.registry,
'digest': item[''],
'labels': item.get('labels', {}),
'aliases': reverse_aliases.get(image_ref.canonical, []),
'size_bytes': item.get('size_bytes', 0),
'resource_limits': res_limits,
'supported_accelerators': accels,
'installed': installed,
'installed_agents': installed_agents,
}
async def _check_image(self, reference: str) -> ImageRef:
known_registries = await get_known_registries(self.etcd)
ref = ImageRef(reference, known_registries)
digest = await self.etcd.get(ref.tag_path)
if digest is None:
raise UnknownImageReference(reference)
return ref
async def inspect_image(
self, reference: Union[str, ImageRef]) -> Mapping[str, Any]:
if isinstance(reference, str):
ref = await ImageRef.resolve_alias(reference, self.etcd)
else:
ref = reference
reverse_aliases = await self._scan_reverse_aliases()
image_info = await self.etcd.get_prefix(ref.tag_path)
if not image_info:
raise UnknownImageReference(reference)
return await self._parse_image(ref, image_info, reverse_aliases)
async def forget_image(self, reference: Union[str, ImageRef]) -> None:
if isinstance(reference, str):
ref = await ImageRef.resolve_alias(reference, self.etcd)
else:
ref = reference
await self.etcd.delete_prefix(ref.tag_path)
async def list_images(self) -> Sequence[Mapping[str, Any]]:
known_registries = await get_known_registries(self.etcd)
reverse_aliases = await self._scan_reverse_aliases()
data = await self.etcd.get_prefix('images')
coros = []
for registry, images in data.items():
if registry == '_aliases':
continue
for image, tags in images.items():
if image == '':
continue
if tags == '1':
continue
for tag, image_info in tags.items():
if tag == '':
continue
raw_ref = f'{etcd_unquote(registry)}/{etcd_unquote(image)}:{tag}'
ref = ImageRef(raw_ref, known_registries)
coros.append(
self._parse_image(ref, image_info, reverse_aliases))
result = await asyncio.gather(*coros)
return result
async def set_image_resource_limit(self, reference: str, slot_type: str,
value_range: Tuple[Optional[Decimal],
Optional[Decimal]]):
ref = await self._check_image(reference)
if value_range[0] is not None:
await self.etcd.put(f'{ref.tag_path}/resource/{slot_type}/min',
str(value_range[0]))
if value_range[1] is not None:
await self.etcd.put(f'{ref.tag_path}/resource/{slot_type}/max',
str(value_range[1]))
async def rescan_images(
self,
registry: str = None,
*,
reporter: ProgressReporter = None,
) -> None:
registry_config_iv = t.Mapping(t.String, container_registry_iv)
latest_registry_config = registry_config_iv.check(
await self.etcd.get_prefix('config/docker/registry'))
self['docker']['registry'] = latest_registry_config
# TODO: delete images from registries removed from the previous config?
if registry is None:
# scan all configured registries
registries = self['docker']['registry']
else:
try:
registries = {registry: self['docker']['registry'][registry]}
except KeyError:
raise RuntimeError("It is an unknown registry.", registry)
async with aiotools.TaskGroup() as tg:
for registry_name, registry_info in registries.items():
log.info('Scanning kernel images from the registry "{0}"',
registry_name)
scanner_cls = get_container_registry(registry_info)
scanner = scanner_cls(self.etcd, registry_name, registry_info)
tg.create_task(scanner.rescan_single_registry(reporter))
# TODO: delete images removed from registry?
async def alias(self, alias: str, target: str) -> None:
await self.etcd.put(f'images/_aliases/{etcd_quote(alias)}', target)
async def dealias(self, alias: str) -> None:
await self.etcd.delete(f'images/_aliases/{etcd_quote(alias)}')
async def update_resource_slots(
self,
slot_key_and_units: Mapping[SlotName, SlotTypes],
) -> None:
updates = {}
known_slots = await self.get_resource_slots()
for k, v in slot_key_and_units.items():
if k not in known_slots or v != known_slots[k]:
updates[f'config/resource_slots/{k}'] = v.value
if updates:
await self.etcd.put_dict(updates)
async def update_manager_status(self, status) -> None:
await self.etcd.put('manager/status', status.value)
self.get_manager_status.cache_clear()
@aiotools.lru_cache(maxsize=1, expire_after=2.0)
async def _get_resource_slots(self):
raw_data = await self.etcd.get_prefix_dict('config/resource_slots')
return {SlotName(k): SlotTypes(v) for k, v in raw_data.items()}
async def get_resource_slots(self) -> Mapping[SlotName, SlotTypes]:
"""
Returns the system-wide known resource slots and their units.
"""
try:
ret = current_resource_slots.get()
except LookupError:
configured_slots = await self._get_resource_slots()
ret = {**INTRINSIC_SLOTS, **configured_slots}
current_resource_slots.set(ret)
return ret
@aiotools.lru_cache(maxsize=1, expire_after=2.0)
async def _get_vfolder_types(self):
return await self.etcd.get_prefix('volumes/_types')
async def get_vfolder_types(self) -> Sequence[str]:
"""
Returns the vfolder types currently set. One of "user" and/or "group".
If none is specified, "user" type is implicitly assumed.
"""
try:
ret = current_vfolder_types.get()
except LookupError:
vf_types = await self._get_vfolder_types()
if not vf_types:
vf_types = {'user': ''}
ret = list(vf_types.keys())
current_vfolder_types.set(ret)
return ret
@aiotools.lru_cache(maxsize=1, expire_after=5.0)
async def get_manager_nodes_info(self):
return await self.etcd.get_prefix_dict('nodes/manager')
@aiotools.lru_cache(maxsize=1, expire_after=2.0)
async def get_manager_status(self):
status = await self.etcd.get('manager/status')
if status is None:
return None
return ManagerStatus(status)
async def watch_manager_status(self):
async with aiotools.aclosing(
self.etcd.watch('manager/status')) as agen:
async for ev in agen:
yield ev
# TODO: refactor using contextvars in Python 3.7 so that the result is cached
# in a per-request basis.
@aiotools.lru_cache(maxsize=1, expire_after=2.0)
async def get_allowed_origins(self):
return await self.get('config/api/allow-origins')
# TODO: refactor using contextvars in Python 3.7 so that the result is cached
# in a per-request basis.
@aiotools.lru_cache(expire_after=60.0)
async def get_image_slot_ranges(self, image_ref: ImageRef):
"""
Returns the minimum and maximum ResourceSlot values.
All slot values are converted and normalized to Decimal.
"""
data = await self.etcd.get_prefix_dict(image_ref.tag_path)
slot_units = await self.get_resource_slots()
min_slot = ResourceSlot()
max_slot = ResourceSlot()
for slot_key, slot_range in data['resource'].items():
slot_unit = slot_units.get(slot_key)
if slot_unit is None:
# ignore unknown slots
continue
min_value = slot_range.get('min')
if min_value is None:
min_value = Decimal(0)
max_value = slot_range.get('max')
if max_value is None:
max_value = Decimal('Infinity')
if slot_unit == 'bytes':
if not isinstance(min_value, Decimal):
min_value = BinarySize.from_str(min_value)
if not isinstance(max_value, Decimal):
max_value = BinarySize.from_str(max_value)
else:
if not isinstance(min_value, Decimal):
min_value = Decimal(min_value)
if not isinstance(max_value, Decimal):
max_value = Decimal(max_value)
min_slot[slot_key] = min_value
max_slot[slot_key] = max_value
# fill missing
for slot_key in slot_units.keys():
if slot_key not in min_slot:
min_slot[slot_key] = Decimal(0)
if slot_key not in max_slot:
max_slot[slot_key] = Decimal('Infinity')
return min_slot, max_slot
def get_redis_url(self, db: int = 0) -> yarl.URL:
"""
Returns a complete URL composed from the given Redis config.
"""
url = (yarl.URL('redis://host').with_host(
str(self.data['redis']['addr'][0])).with_port(
self.data['redis']['addr'][1]).with_password(
self.data['redis']['password']) / str(db))
return url
class ConfigServer:
def __init__(self, app_ctx, etcd_addr, etcd_user, etcd_password,
namespace):
# WARNING: importing etcd3/grpc must be done after forks.
from ai.backend.common.etcd import AsyncEtcd
self.context = app_ctx
credentials = None
if etcd_user:
credentials = {
'user': etcd_user,
'password': etcd_password,
}
scope_prefix_map = {
ConfigScopes.GLOBAL: '',
# TODO: provide a way to specify other scope prefixes
}
self.etcd = AsyncEtcd(etcd_addr,
namespace,
scope_prefix_map,
credentials=credentials)
async def get(self, key, allow_null=True):
value = await self.etcd.get(key)
if value is None:
value = config_defaults.get(key, None)
if not allow_null and value is None:
raise ServerMisconfiguredError(
'A required etcd config is missing.', key)
return value
async def register_myself(self, app_config):
instance_id = await get_instance_id()
event_addr = app_config['manager']['event-listen-addr']
log.info('manager is listening agent events at {}', event_addr)
event_addr = '{0.host}:{0.port}'.format(event_addr)
manager_info = {
'nodes/manager': instance_id,
'nodes/manager/event_addr': event_addr,
}
await self.etcd.put_dict(manager_info)
async def deregister_myself(self):
await self.etcd.delete_prefix('nodes/manager')
async def update_aliases_from_file(self, file: Path):
log.info('Updating image aliases from "{0}"', file)
try:
data = yaml.load(open(file, 'r', encoding='utf-8'))
except IOError:
log.error('Cannot open "{0}".', file)
return
for item in data['aliases']:
alias = item[0]
target = item[1]
await self.etcd.put(f'images/_aliases/{etcd_quote(alias)}', target)
print(f'{alias} -> {target}')
log.info('Done.')
async def _scan_reverse_aliases(self):
aliases = await self.etcd.get_prefix('images/_aliases')
result = defaultdict(list)
for key, value in aliases.items():
result[value].append(etcd_unquote(key))
return result
async def _parse_image(self, image_ref, item, reverse_aliases):
installed = (await self.context['redis_image'].scard(
image_ref.canonical)) > 0
res_limits = []
for slot_key, slot_range in item['resource'].items():
min_value = slot_range.get('min')
if min_value is None:
min_value = Decimal(0)
max_value = slot_range.get('max')
if max_value is None:
max_value = Decimal('Infinity')
res_limits.append({
'key': slot_key,
'min': min_value,
'max': max_value,
})
accels = item.get('accelerators')
if accels is None:
accels = []
else:
accels = accels.split(',')
return {
'name': image_ref.name,
'humanized_name': image_ref.name, # TODO: implement
'tag': image_ref.tag,
'registry': image_ref.registry,
'digest': item[''],
'labels': item.get('labels', {}),
'aliases': reverse_aliases.get(image_ref.canonical, []),
'size_bytes': item.get('size_bytes', 0),
'resource_limits': res_limits,
'supported_accelerators': accels,
'installed': installed,
}
async def _check_image(self, reference: str) -> ImageRef:
known_registries = await get_known_registries(self.etcd)
ref = ImageRef(reference, known_registries)
digest = await self.etcd.get(ref.tag_path)
if digest is None:
raise UnknownImageReference(reference)
return ref
async def inspect_image(self, reference: Union[str, ImageRef]):
if isinstance(reference, str):
ref = await ImageRef.resolve_alias(reference, self.etcd)
else:
ref = reference
reverse_aliases = await self._scan_reverse_aliases()
image_info = await self.etcd.get_prefix(ref.tag_path)
if not image_info:
raise UnknownImageReference(reference)
return await self._parse_image(ref, image_info, reverse_aliases)
async def list_images(self):
known_registries = await get_known_registries(self.etcd)
reverse_aliases = await self._scan_reverse_aliases()
data = await self.etcd.get_prefix('images')
coros = []
for registry, images in data.items():
if registry == '_aliases':
continue
for image, tags in images.items():
if image == '':
continue
for tag, image_info in tags.items():
if tag == '':
continue
raw_ref = f'{etcd_unquote(registry)}/{etcd_unquote(image)}:{tag}'
ref = ImageRef(raw_ref, known_registries)
coros.append(
self._parse_image(ref, image_info, reverse_aliases))
return await asyncio.gather(*coros)
async def set_image_resource_limit(self, reference: str, slot_type: str,
value_range: Tuple[Optional[Decimal],
Optional[Decimal]]):
ref = await self._check_image(reference)
if value_range[0] is not None:
await self.etcd.put(f'{ref.tag_path}/resource/{slot_type}/min',
str(value_range[0]))
if value_range[1] is not None:
await self.etcd.put(f'{ref.tag_path}/resource/{slot_type}/max',
str(value_range[1]))
async def _rescan_images(self, registry_name, registry_info):
all_updates = {}
base_hdrs = {
'Accept': 'application/vnd.docker.distribution.manifest.v2+json',
}
registry_url = yarl.URL(registry_info[''])
registry_type = registry_info.get('type', 'docker')
registry_project = registry_info.get('project')
credentials = {}
username = registry_info.get('username')
if username is not None:
credentials['username'] = username
password = registry_info.get('password')
if password is not None:
credentials['password'] = password
async def _scan_image(sess, image):
rqst_args = await registry_login(sess, registry_url, credentials,
f'repository:{image}:pull')
rqst_args['headers'].update(**base_hdrs)
tags = []
async with sess.get(registry_url / f'v2/{image}/tags/list',
**rqst_args) as resp:
data = json.loads(await resp.read())
if 'tags' in data:
# sometimes there are dangling image names in the hub.
tags.extend(data['tags'])
scheduler = await aiojobs.create_scheduler(limit=8)
try:
jobs = await asyncio.gather(*[
scheduler.spawn(_scan_tag(sess, rqst_args, image, tag))
for tag in tags
])
await asyncio.gather(*[job.wait() for job in jobs])
finally:
await scheduler.close()
async def _scan_tag(sess, rqst_args, image, tag):
config_digest = None
labels = {}
async with sess.get(registry_url / f'v2/{image}/manifests/{tag}',
**rqst_args) as resp:
resp.raise_for_status()
data = await resp.json()
config_digest = data['config']['digest']
size_bytes = (sum(layer['size'] for layer in data['layers']) +
data['config']['size'])
async with sess.get(
registry_url / f'v2/{image}/blobs/{config_digest}',
**rqst_args) as resp:
# content-type may not be json...
resp.raise_for_status()
data = json.loads(await resp.read())
raw_labels = data['container_config']['Labels']
if raw_labels:
labels.update(raw_labels)
log.debug('checking image repository {}:{}', image, tag)
if not labels.get('ai.backend.kernelspec'):
# Skip non-Backend.AI kernel images
return
log.info('Updating metadata for {0}:{1}', image, tag)
updates = {}
updates[f'images/{etcd_quote(registry_name)}/'
f'{etcd_quote(image)}'] = '1'
tag_prefix = f'images/{etcd_quote(registry_name)}/' \
f'{etcd_quote(image)}/{tag}'
updates[tag_prefix] = config_digest
updates[f'{tag_prefix}/size_bytes'] = size_bytes
for k, v in labels.items():
updates[f'{tag_prefix}/labels/{k}'] = v
accels = labels.get('ai.backend.accelerators')
if accels:
updates[f'{tag_prefix}/accels'] = accels
res_prefix = 'ai.backend.resource.min.'
for k, v in filter(lambda pair: pair[0].startswith(res_prefix),
labels.items()):
res_key = k[len(res_prefix):]
updates[f'{tag_prefix}/resource/{res_key}/min'] = v
all_updates.update(updates)
ssl_ctx = None # default
app_config = self.context.get('config')
if app_config is not None and not app_config['docker-registry'][
'ssl-verify']:
ssl_ctx = False
connector = aiohttp.TCPConnector(ssl=ssl_ctx)
async with aiohttp.ClientSession(connector=connector) as sess:
images = []
if registry_url.host.endswith('.docker.io'):
# We need some special treatment for the Docker Hub.
params = {'page_size': '100'}
username = await self.etcd.get(
f'config/docker/registry/{etcd_quote(registry_name)}/username'
)
hub_url = yarl.URL('https://hub.docker.com')
async with sess.get(hub_url / f'v2/repositories/{username}/',
params=params) as resp:
if resp.status == 200:
data = await resp.json()
images.extend(
f"{username}/{item['name']}"
for item in data['results']
# a little optimization to ignore legacies
if not item['name'].startswith('kernel-'))
else:
log.error(
'Failed to fetch repository list from {0} '
'(status={1})', hub_url, resp.status)
elif registry_type == 'docker':
# In other cases, try the catalog search.
rqst_args = await registry_login(sess, registry_url,
credentials,
'registry:catalog:*')
async with sess.get(registry_url / 'v2/_catalog',
**rqst_args) as resp:
if resp.status == 200:
data = json.loads(await resp.read())
images.extend(data['repositories'])
log.debug('found {} repositories', len(images))
else:
log.warning(
'Docker registry {0} does not allow/support '
'catalog search. (status={1})', registry_url,
resp.status)
elif registry_type == 'harbor':
if credentials:
rqst_args = {
'auth':
aiohttp.BasicAuth(credentials['username'],
credentials['password'])
}
else:
rqst_args = {}
async with sess.get(registry_url / 'api/projects',
params={'page_size': '100'},
**rqst_args) as resp:
projects = await resp.json()
project_id = None
for item in projects:
if item['name'] == registry_project:
project_id = item['project_id']
break
else:
log.warning('There is no given project.')
return
async with sess.get(registry_url / 'api/repositories',
params={
'project_id': project_id,
'page_size': '100'
},
**rqst_args) as resp:
items = await resp.json()
repos = [item['name'] for item in items]
images.extend(repos)
else:
log.error('Unsupported registry type')
return
scheduler = await aiojobs.create_scheduler(limit=8)
try:
jobs = await asyncio.gather(*[
scheduler.spawn(_scan_image(sess, image))
for image in images
])
await asyncio.gather(*[job.wait() for job in jobs])
finally:
await scheduler.close()
if not all_updates:
log.info('No images found in registry {0}', registry_url)
return
for kvlist in chunked(sorted(all_updates.items()), 16):
await self.etcd.put_dict(dict(kvlist))
async def rescan_images(self, registry: str = None):
if registry is None:
registries = []
data = await self.etcd.get_prefix('config/docker/registry')
for key, val in data.items():
if key:
registries.append(etcd_unquote(key))
else:
registries = [registry]
coros = []
for registry in registries:
log.info('Scanning kernel images from the registry "{0}"',
registry)
registry_info = await self.etcd.get_prefix(
f'config/docker/registry/{etcd_quote(registry)}')
if not registry_info:
log.error('Unknown registry: "{0}"', registry)
continue
coros.append(self._rescan_images(registry, registry_info))
await asyncio.gather(*coros)
# TODO: delete images removed from registry?
async def alias(self, alias: str, target: str):
await self.etcd.put(f'images/_aliases/{etcd_quote(alias)}', target)
async def dealias(self, alias: str):
await self.etcd.delete(f'images/_aliases/{etcd_quote(alias)}')
async def update_volumes_from_file(self, file: Path):
log.info('Updating network volumes from "{0}"', file)
try:
data = yaml.load(open(file, 'r', encoding='utf-8'))
except IOError:
log.error('Cannot open "{0}".', file)
return
for item in data['volumes']:
name = item['name']
updates = {
f'volumes/{name}/mount/{k}': v
for k, v in item['mount'].items()
}
await self.etcd.put_dict(updates)
log.info('done')
async def update_resource_slots(self,
slot_key_and_units,
*,
clear_existing: bool = True):
updates = {}
if clear_existing:
await self.etcd.delete_prefix('config/resource_slots/')
for k, v in slot_key_and_units.items():
if k in ('cpu', 'mem'):
continue
# currently we support only two units
# (where count may be fractional)
assert v in ('bytes', 'count')
updates[f'config/resource_slots/{k}'] = v
await self.etcd.put_dict(updates)
async def update_manager_status(self, status):
await self.etcd.put('manager/status', status.value)
self.get_manager_status.cache_clear()
# TODO: refactor using contextvars in Python 3.7 so that the result is cached
# in a per-request basis.
@aiotools.lru_cache(maxsize=1, expire_after=2.0)
async def get_resource_slots(self):
'''
Returns the system-wide known resource slots and their units.
'''
intrinsic_slots = {'cpu': 'count', 'mem': 'bytes'}
configured_slots = await self.etcd.get_prefix_dict(
'config/resource_slots')
return {**intrinsic_slots, **configured_slots}
@aiotools.lru_cache(maxsize=1, expire_after=60.0)
async def get_vfolder_types(self):
'''
Returns the vfolder types currently set. One of "user" and/or "group".
If none is specified, "user" type is implicitly assumed.
'''
vf_types = await self.etcd.get_prefix_dict('volumes/_types')
if not vf_types:
vf_types = {'user': ''}
return list(vf_types.keys())
@aiotools.lru_cache(maxsize=1, expire_after=5.0)
async def get_manager_nodes_info(self):
return await self.etcd.get_prefix_dict('nodes/manager')
@aiotools.lru_cache(maxsize=1, expire_after=2.0)
async def get_manager_status(self):
status = await self.etcd.get('manager/status')
return ManagerStatus(status)
async def watch_manager_status(self):
async for ev in self.etcd.watch('manager/status'):
yield ev
# TODO: refactor using contextvars in Python 3.7 so that the result is cached
# in a per-request basis.
@aiotools.lru_cache(maxsize=1, expire_after=2.0)
async def get_allowed_origins(self):
return await self.get('config/api/allow-origins')
# TODO: refactor using contextvars in Python 3.7 so that the result is cached
# in a per-request basis.
@aiotools.lru_cache(expire_after=60.0)
async def get_image_slot_ranges(self, image_ref: ImageRef):
'''
Returns the minimum and maximum ResourceSlot values.
All slot values are converted and normalized to Decimal.
'''
data = await self.etcd.get_prefix_dict(image_ref.tag_path)
slot_units = await self.get_resource_slots()
min_slot = ResourceSlot()
max_slot = ResourceSlot()
for slot_key, slot_range in data['resource'].items():
slot_unit = slot_units.get(slot_key)
if slot_unit is None:
# ignore unknown slots
continue
min_value = slot_range.get('min')
if min_value is None:
min_value = Decimal(0)
max_value = slot_range.get('max')
if max_value is None:
max_value = Decimal('Infinity')
if slot_unit == 'bytes':
if not isinstance(min_value, Decimal):
min_value = BinarySize.from_str(min_value)
if not isinstance(max_value, Decimal):
max_value = BinarySize.from_str(max_value)
else:
if not isinstance(min_value, Decimal):
min_value = Decimal(min_value)
if not isinstance(max_value, Decimal):
max_value = Decimal(max_value)
min_slot[slot_key] = min_value
max_slot[slot_key] = max_value
# fill missing
for slot_key in slot_units.keys():
if slot_key not in min_slot:
min_slot[slot_key] = Decimal(0)
if slot_key not in max_slot:
max_slot[slot_key] = Decimal('Infinity')
return min_slot, max_slot
class ConfigServer:
def __init__(self, etcd_addr, namespace):
# WARNING: importing etcd3/grpc must be done after forks.
from ai.backend.common.etcd import AsyncEtcd
self.etcd = AsyncEtcd(etcd_addr, namespace)
async def register_myself(self, app_config):
instance_id = await get_instance_id()
if app_config.advertised_manager_host:
instance_ip = app_config.advertised_manager_host
log.info('manually set advertised manager host: {0}', instance_ip)
else:
# fall back 1: read private IP from cloud instance metadata
# fall back 2: read hostname and resolve it
# fall back 3: "127.0.0.1"
instance_ip = await get_instance_ip()
event_addr = f'{instance_ip}:{app_config.events_port}'
await self.etcd.put_multi([
'nodes/manager', 'nodes/redis', 'nodes/manager/event_addr',
'nodes/docker_registry'
], [
instance_id, app_config.redis_addr, event_addr,
app_config.docker_registry
])
async def deregister_myself(self):
await self.etcd.delete_prefix('nodes/manager')
async def update_kernel_images_from_file(self, file: Path):
log.info('Loading kernel image data from "{0}"', file)
try:
data = yaml.load(open(file, 'rb'))
except IOError:
log.error('Cannot open "{0}".', file)
return
for image in data['images']:
name = image['name']
print(f"Updating {name}")
inserted_aliases = []
for tag, hash in image['tags']:
assert hash
if hash.startswith(':'): # tag-level alias
inserted_aliases.append((f'images/_aliases/{name}:{tag}',
f'{name}:{hash[1:]}'))
if inserted_aliases:
await self.etcd.put_multi(*zip(*inserted_aliases))
cpu_share = image['slots']['cpu']
cpu_share = 'null' if cpu_share is None else f'{cpu_share:.2f}'
mem_share = image['slots']['mem']
mem_share = 'null' if mem_share is None else f'{mem_share:.2f}'
gpu_share = image['slots']['gpu']
gpu_share = 'null' if gpu_share is None else f'{gpu_share:.2f}'
await self.etcd.put_multi([
f'images/{name}', f'images/{name}/cpu', f'images/{name}/mem',
f'images/{name}/gpu'
], ['1', cpu_share, mem_share, gpu_share])
inserted_tags = [(f'images/{name}/tags/{tag}', hash)
for tag, hash in image['tags']]
await self.etcd.put_multi(*zip(*inserted_tags))
log.info('Done.')
async def update_aliases_from_file(self, file: Path):
log.info('Updating image aliases from "{0}"', file)
try:
data = yaml.load(open(file, 'rb'))
except IOError:
log.error('Cannot open "{0}".', file)
return
for item in data['aliases']:
alias = item[0]
target = item[1]
await self.etcd.put(f'images/_aliases/{alias}', target)
print(f'{alias} -> {target}')
log.info('Done.')
async def update_kernel_images_from_registry(self, registry_addr):
log.info('Scanning kernel image versions from "{0}"', registry_addr)
# TODO: a method to scan docker hub and update kernel image versions
# TODO: a cli command to execute the above method
raise NotImplementedError
async def update_volumes_from_file(self, file: Path):
log.info('Updating network volumes from "{0}"', file)
try:
data = yaml.load(open(file, 'rb'))
except IOError:
log.error('Cannot open "{0}".', file)
return
for item in data['volumes']:
name = item['name']
ks = []
vs = []
for k, v in item['mount'].items():
ks.append(f'volumes/{name}/mount/{k}')
vs.append(v)
await self.etcd.put_multi(ks, vs)
log.info('done')
async def manager_status_update(self):
async for ev in self.etcd.watch('manager/status'):
yield ev
async def update_manager_status(self, status):
await self.etcd.put('manager/status', status.value)
@aiotools.lru_cache(maxsize=1)
async def get_manager_status(self):
status = await self.etcd.get('manager/status')
return ManagerStatus(status)
@aiotools.lru_cache(maxsize=1, expire_after=60.0)
async def get_allowed_origins(self):
origins = await self.etcd.get('config/api/allow-origins')
if origins is None:
origins = '*'
return origins
@aiotools.lru_cache(maxsize=1)
async def get_docker_registry(self):
docker_registry = await self.etcd.get('nodes/docker_registry')
return docker_registry
@aiotools.lru_cache(maxsize=1, expire_after=60.0)
async def get_overbook_factors(self):
'''
Retrieves the overbook parameters which is used to
scale the resource slot values reported by the agent
to increase server utilization.
TIP: If your users run mostly compute-intesive sessions,
lower these values towards 1.0.
'''
cpu = await self.etcd.get('config/overbook/cpu')
cpu = 6.0 if cpu is None else float(cpu)
mem = await self.etcd.get('config/overbook/mem')
mem = 2.0 if mem is None else float(mem)
gpu = await self.etcd.get('config/overbook/gpu')
gpu = 1.0 if gpu is None else float(gpu)
return {
'mem': mem,
'cpu': cpu,
'gpu': gpu,
}
@aiotools.lru_cache(expire_after=60.0)
async def get_image_required_slots(self, name, tag):
installed = await self.etcd.get(f'images/{name}')
if installed is None:
raise RuntimeError('Image metadata is not available!')
cpu = await self.etcd.get(f'images/{name}/cpu')
cpu = None if cpu == 'null' else Decimal(cpu)
mem = await self.etcd.get(f'images/{name}/mem')
mem = None if mem == 'null' else Decimal(mem)
if '-gpu' in tag or '-cuda' in tag:
gpu = await self.etcd.get(f'images/{name}/gpu')
gpu = Decimal(0) if gpu == 'null' else Decimal(gpu)
else:
gpu = Decimal(0)
return ResourceSlot(mem=mem, cpu=cpu, gpu=gpu)
@aiotools.lru_cache(expire_after=60.0)
async def resolve_image_name(self, name_or_alias):
async def resolve_alias(alias_key):
alias_target = None
while True:
prev_alias_key = alias_key
alias_key = await self.etcd.get(f'images/_aliases/{alias_key}')
if alias_key is None:
alias_target = prev_alias_key
break
return alias_target
alias_target = await resolve_alias(name_or_alias)
if alias_target == name_or_alias and name_or_alias.rfind(':') == -1:
alias_target = await resolve_alias(f'{name_or_alias}:latest')
assert alias_target is not None
name, _, tag = alias_target.partition(':')
hash = await self.etcd.get(f'images/{name}/tags/{tag}')
if hash is None:
raise ImageNotFound(f'{name_or_alias}: Unregistered image '
'or unknown alias.')
return name, tag