import os
from contextlib import contextmanager
from typing import Any, Mapping, Optional, Sequence
import dagster._seven as seven
from azure.identity import DefaultAzureCredential
from dagster import (
Field,
Noneable,
Permissive,
StringSource,
_check as check,
)
from dagster._core.storage.cloud_storage_compute_log_manager import (
CloudStorageComputeLogManager,
PollingComputeLogSubscriptionManager,
)
from dagster._core.storage.compute_log_manager import ComputeIOType
from dagster._core.storage.local_compute_log_manager import (
IO_TYPE_EXTENSION,
LocalComputeLogManager,
)
from dagster._serdes import ConfigurableClass, ConfigurableClassData
from dagster._utils import ensure_dir, ensure_file
from typing_extensions import Self
from .utils import create_blob_client, generate_blob_sas
[docs]class AzureBlobComputeLogManager(CloudStorageComputeLogManager, ConfigurableClass):
"""Logs op compute function stdout and stderr to Azure Blob Storage.
This is also compatible with Azure Data Lake Storage.
Users should not instantiate this class directly. Instead, use a YAML block in ``dagster.yaml``
such as the following:
.. code-block:: YAML
compute_logs:
module: dagster_azure.blob.compute_log_manager
class: AzureBlobComputeLogManager
config:
storage_account: my-storage-account
container: my-container
credential: sas-token-or-secret-key
default_azure_credential:
exclude_environment_credential: true
prefix: "dagster-test-"
local_dir: "/tmp/cool"
upload_interval: 30
Args:
storage_account (str): The storage account name to which to log.
container (str): The container (or ADLS2 filesystem) to which to log.
secret_key (Optional[str]): Secret key for the storage account. SAS tokens are not
supported because we need a secret key to generate a SAS token for a download URL.
default_azure_credential (Optional[dict]): Use and configure DefaultAzureCredential.
Cannot be used with sas token or secret key config.
local_dir (Optional[str]): Path to the local directory in which to stage logs. Default:
``dagster._seven.get_system_temp_directory()``.
prefix (Optional[str]): Prefix for the log file keys.
upload_interval: (Optional[int]): Interval in seconds to upload partial log files blob storage. By default, will only upload when the capture is complete.
inst_data (Optional[ConfigurableClassData]): Serializable representation of the compute
log manager when newed up from config.
"""
def __init__(
self,
storage_account,
container,
secret_key=None,
local_dir=None,
inst_data: Optional[ConfigurableClassData] = None,
prefix="dagster",
upload_interval=None,
default_azure_credential=None,
):
self._storage_account = check.str_param(storage_account, "storage_account")
self._container = check.str_param(container, "container")
self._blob_prefix = self._clean_prefix(check.str_param(prefix, "prefix"))
self._default_azure_credential = check.opt_dict_param(
default_azure_credential, "default_azure_credential"
)
check.opt_str_param(secret_key, "secret_key")
check.invariant(
secret_key is not None or default_azure_credential is not None,
"Missing config: need to provide one of secret_key or default_azure_credential",
)
if default_azure_credential is None:
self._blob_client = create_blob_client(storage_account, secret_key)
else:
credential = DefaultAzureCredential(**self._default_azure_credential)
self._blob_client = create_blob_client(storage_account, credential)
self._container_client = self._blob_client.get_container_client(container)
self._download_urls = {}
# proxy calls to local compute log manager (for subscriptions, etc)
if not local_dir:
local_dir = seven.get_system_temp_directory()
self._local_manager = LocalComputeLogManager(local_dir)
self._subscription_manager = PollingComputeLogSubscriptionManager(self)
self._upload_interval = check.opt_int_param(upload_interval, "upload_interval")
self._inst_data = check.opt_inst_param(inst_data, "inst_data", ConfigurableClassData)
@contextmanager
def _watch_logs(self, dagster_run, step_key=None):
# proxy watching to the local compute log manager, interacting with the filesystem
with self.local_manager._watch_logs(dagster_run, step_key): # noqa: SLF001
yield
@property
def inst_data(self):
return self._inst_data
@classmethod
def config_type(cls):
return {
"storage_account": StringSource,
"container": StringSource,
"secret_key": Field(StringSource, is_required=False),
"default_azure_credential": Field(
Noneable(Permissive(description="keyword arguments for DefaultAzureCredential")),
is_required=False,
default_value=None,
),
"local_dir": Field(StringSource, is_required=False),
"prefix": Field(StringSource, is_required=False, default_value="dagster"),
"upload_interval": Field(Noneable(int), is_required=False, default_value=None),
}
@classmethod
def from_config_value(
cls, inst_data: ConfigurableClassData, config_value: Mapping[str, Any]
) -> Self:
return cls(inst_data=inst_data, **config_value)
@property
def local_manager(self) -> LocalComputeLogManager:
return self._local_manager
@property
def upload_interval(self) -> Optional[int]:
return self._upload_interval if self._upload_interval else None
def _clean_prefix(self, prefix):
parts = prefix.split("/")
return "/".join([part for part in parts if part])
def _blob_key(self, log_key, io_type, partial=False):
check.inst_param(io_type, "io_type", ComputeIOType)
extension = IO_TYPE_EXTENSION[io_type]
[*namespace, filebase] = log_key
filename = f"{filebase}.{extension}"
if partial:
filename = f"{filename}.partial"
paths = [self._blob_prefix, "storage", *namespace, filename]
return "/".join(paths) # blob path delimiter
def delete_logs(
self, log_key: Optional[Sequence[str]] = None, prefix: Optional[Sequence[str]] = None
):
self.local_manager.delete_logs(log_key=log_key, prefix=prefix)
if log_key:
prefix_path = "/".join([self._blob_prefix, "storage", *log_key])
elif prefix:
# add the trailing '/' to make sure that ['a'] does not match ['apple']
prefix_path = "/".join([self._blob_prefix, "storage", *prefix, ""])
else:
prefix_path = None
blob_list = {
b.name for b in list(self._container_client.list_blobs(name_starts_with=prefix_path))
}
to_remove = None
if log_key:
# filter to the known set of keys
known_keys = [
self._blob_key(log_key, ComputeIOType.STDOUT),
self._blob_key(log_key, ComputeIOType.STDERR),
self._blob_key(log_key, ComputeIOType.STDOUT, partial=True),
self._blob_key(log_key, ComputeIOType.STDERR, partial=True),
]
to_remove = [key for key in known_keys if key in blob_list]
elif prefix:
to_remove = list(blob_list)
else:
check.failed("Must pass in either `log_key` or `prefix` argument to delete_logs")
if to_remove:
self._container_client.delete_blobs(*to_remove)
def download_url_for_type(self, log_key: Sequence[str], io_type: ComputeIOType):
if not self.is_capture_complete(log_key):
return None
blob_key = self._blob_key(log_key, io_type)
if blob_key in self._download_urls:
return self._download_urls[blob_key]
blob = self._container_client.get_blob_client(blob_key)
sas = generate_blob_sas(
self._storage_account,
self._container,
blob_key,
account_key=self._blob_client.credential.account_key,
)
url = blob.url + sas
self._download_urls[blob_key] = url
return url
def display_path_for_type(self, log_key: Sequence[str], io_type: ComputeIOType):
if not self.is_capture_complete(log_key):
return self.local_manager.get_captured_local_path(log_key, IO_TYPE_EXTENSION[io_type])
blob_key = self._blob_key(log_key, io_type)
return f"https://{self._storage_account}.blob.core.windows.net/{self._container}/{blob_key}"
def cloud_storage_has_logs(
self, log_key: Sequence[str], io_type: ComputeIOType, partial: bool = False
) -> bool:
blob_key = self._blob_key(log_key, io_type, partial=partial)
blob_objects = self._container_client.list_blobs(blob_key)
exact_matches = [blob for blob in blob_objects if blob.name == blob_key]
return len(exact_matches) > 0
def upload_to_cloud_storage(
self, log_key: Sequence[str], io_type: ComputeIOType, partial=False
):
path = self.local_manager.get_captured_local_path(log_key, IO_TYPE_EXTENSION[io_type])
ensure_file(path)
blob_key = self._blob_key(log_key, io_type, partial=partial)
with open(path, "rb") as data:
blob = self._container_client.get_blob_client(blob_key)
blob.upload_blob(data)
def download_from_cloud_storage(
self, log_key: Sequence[str], io_type: ComputeIOType, partial=False
):
path = self.local_manager.get_captured_local_path(
log_key, IO_TYPE_EXTENSION[io_type], partial=partial
)
ensure_dir(os.path.dirname(path))
blob_key = self._blob_key(log_key, io_type, partial=partial)
with open(path, "wb") as fileobj:
blob = self._container_client.get_blob_client(blob_key)
blob.download_blob().readinto(fileobj)
def on_subscribe(self, subscription):
self._subscription_manager.add_subscription(subscription)
def on_unsubscribe(self, subscription):
self._subscription_manager.remove_subscription(subscription)