Azure Batch Management Client Library

Warnings

• breaking Major version increments (e.g., 18.x.x to 19.x.x) often signify an update to a newer Azure Batch service API version. This regularly involves breaking changes to model schemas, parameter names, and client method signatures. For instance, version 19.0.0 updated to API version 2024-02-01 and included model and parameter renames.
  Fix: Always consult the `CHANGELOG.md` file in the package's GitHub directory (e.g., `sdk/batch/azure-mgmt-batch/CHANGELOG.md`) for specific changes when upgrading major versions. Update your code based on the new API patterns.
• gotcha Authentication with `DefaultAzureCredential` can fail with `CredentialUnavailableError` if required environment variables (e.g., `AZURE_CLIENT_ID`, `AZURE_TENANT_ID`, `AZURE_CLIENT_SECRET` for a Service Principal) are not set, or if you are not logged in via Azure CLI (`az login`) or other supported means.
  Fix: Ensure necessary environment variables are configured for service principal authentication, or authenticate interactively using `az login` (Azure CLI) or `Connect-AzAccount` (Azure PowerShell). Verify the identity you are using has the 'Contributor' or 'Batch Account Contributor' role on the target subscription/resource group.
• gotcha Many operations that modify or create resources (e.g., `create`, `update`, `delete`) are Long-Running Operations (LROs) that return a poller object. It's crucial to `wait()` on this poller (for synchronous clients) or `await` its completion (for asynchronous clients) to ensure the operation completes successfully and to retrieve the final result.
  Fix: When performing operations that return a poller, make sure to call `.result()` on the poller object (e.g., `poller.result()`) to block until the operation finishes and get its final outcome.

Install

• pip install azure-mgmt-batch azure-identity Install core library and authentication

Imports

• BatchManagementClient

  from azure.mgmt.batch import BatchManagementClient

• DefaultAzureCredential

  from azure.identity import DefaultAzureCredential

Quickstart

This quickstart demonstrates how to authenticate with Azure and list existing Azure Batch accounts within a subscription. It uses `DefaultAzureCredential` for flexible authentication and `BatchManagementClient` to interact with the Azure Batch management plane.

import os
from azure.identity import DefaultAzureCredential
from azure.mgmt.batch import BatchManagementClient

# Ensure you have your Azure Subscription ID set as an environment variable (AZURE_SUBSCRIPTION_ID)
# or replace 'YOUR_SUBSCRIPTION_ID' with your actual subscription ID.
subscription_id = os.environ.get("AZURE_SUBSCRIPTION_ID", "YOUR_SUBSCRIPTION_ID")

if subscription_id == "YOUR_SUBSCRIPTION_ID":
    print("WARNING: AZURE_SUBSCRIPTION_ID environment variable not set. Using placeholder.")
    print("Please set AZURE_SUBSCRIPTION_ID for actual resource management.")

try:
    # Acquire a credential object for authentication
    credential = DefaultAzureCredential()

    # Create a BatchManagementClient instance
    batch_client = BatchManagementClient(credential, subscription_id)

    print(f"Listing Batch accounts in subscription: {subscription_id}")
    
    # List all Batch accounts in the current subscription
    # This operation is synchronous.
    batch_accounts = batch_client.batch_account.list_by_subscription()

    found_accounts = 0
    for account in batch_accounts:
        print(f"- Account name: {account.name}, Location: {account.location}, Provisioning State: {account.provisioning_state.value}")
        found_accounts += 1
    
    if found_accounts == 0:
        print("No Batch accounts found in this subscription.")

except Exception as e:
    print(f"An error occurred: {e}")
    print("Please ensure you have set AZURE_SUBSCRIPTION_ID and are authenticated (e.g., via Azure CLI 'az login' or environment variables for a Service Principal).")