Iceberg Azure credential vending

[smaheshwar-pltr]

Description

// Work in progress

Support Azure credential vending with Iceberg REST catalog.

Additional context and related issues

Closes #23238

Release notes

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## Section
* Fix some things. ({issue}`issuenumber`)

Summary by Sourcery

Enable Azure credential vending by extracting SAS tokens from file IO properties for Iceberg REST catalog and injecting them into the Azure filesystem via a new AzureVendedAuth wrapper.

New Features:

• Support Azure SAS token vending in Iceberg REST catalog filesystem factory
• Introduce AzureVendedAuth in AzureFileSystemFactory to apply per-account vended SAS tokens with fallback to default authentication

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Sreesh Maheshwar.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
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[sourcery-ai]

Reviewer's Guide

This PR extends Iceberg REST catalog support to vend Azure SAS token credentials alongside existing S3 credential vending by unifying the credential selection logic, propagating vended credentials through the Azure filesystem, and introducing a new AzureVendedAuth implementation.

Class diagram for updated Azure authentication classes

classDiagram
    class AzureAuth {
        <<interface>>
        +void setAuth(String storageAccount, BlobContainerClientBuilder builder)
        +void setAuth(String storageAccount, DataLakeServiceClientBuilder builder)
    }
    class AzureAuthAccessKey
    class AzureAuthDefault
    class AzureAuthOauth
    class AzureVendedAuth {
        +Map<String, String> accountSasTokens
        +AzureAuth fallbackAuth
        +AzureVendedAuth(Map<String, String> accountSasTokens, AzureAuth fallbackAuth)
        +void setAuth(String storageAccount, BlobContainerClientBuilder builder)
        +void setAuth(String storageAccount, DataLakeServiceClientBuilder builder)
    }
    AzureAuth <|.. AzureAuthAccessKey
    AzureAuth <|.. AzureAuthDefault
    AzureAuth <|.. AzureAuthOauth
    AzureAuth <|.. AzureVendedAuth
    AzureVendedAuth --> AzureAuth : fallbackAuth

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Class diagram for AzureFileSystemFactory authentication selection

classDiagram
    class AzureFileSystemFactory {
        +TrinoFileSystem create(ConnectorIdentity identity)
        -static AzureAuth withVendedAuth(ConnectorIdentity identity, AzureAuth defaultAuth)
    }
    class AzureAuth
    class AzureVendedAuth
    AzureFileSystemFactory --> AzureAuth
    AzureFileSystemFactory --> AzureVendedAuth

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File-Level Changes

Change	Details	Files
Unify vended credential logic in IcebergRestCatalogFileSystemFactory and add Azure SAS token support	Replaced S3-only credential block with a builder handling both S3 access keys and Azure SAS tokens Added getAzureCredentials helper to extract per-account SAS tokens from properties Adjusted identity creation to use overridden credentials when available	plugin/trino-iceberg/src/main/java/io/trino/plugin/iceberg/catalog/rest/IcebergRestCatalogFileSystemFactory.java
Propagate vended credentials into Azure filesystem factory	Wrapped default AzureAuth with withVendedAuth in AzureFileSystemFactory.create Implemented withVendedAuth to choose between fallback and vended credentials from ConnectorIdentity	lib/trino-filesystem-azure/src/main/java/io/trino/filesystem/azure/AzureFileSystemFactory.java
Introduce AzureVendedAuth implementation and related constants	Extended AzureAuth sealed interface to permit AzureVendedAuth Added AzureVendedAuth class to apply SAS token or fallback auth per storage account Defined AzureFileSystemConstants.EXTRA_SAS_TOKEN_PROPERTY_PREFIX for SAS token keys	lib/trino-filesystem-azure/src/main/java/io/trino/filesystem/azure/AzureAuth.java lib/trino-filesystem-azure/src/main/java/io/trino/filesystem/azure/AzureVendedAuth.java lib/trino-filesystem-azure/src/main/java/io/trino/filesystem/azure/AzureFileSystemConstants.java

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[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Sreesh Maheshwar.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email [email protected]
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[smaheshwar-pltr]

Introducing this new auth means that with this PR,

trino/lib/trino-filesystem-azure/src/main/java/io/trino/filesystem/azure/AzureFileSystem.java

Lines 482 to 486 in d20c663

	return switch (azureAuth) {
	case AzureAuthOauth _ -> oauth2PresignedUri(location, ttl, Optional.empty());
	case AzureAuthAccessKey _ -> accessKeyPresignedUri(location, ttl, Optional.empty());
	default -> throw new UnsupportedOperationException("Unsupported azure auth: " + azureAuth);
	};

throws.

Maybe this is fine for now, as I see it's not supported even for default auth?

[smaheshwar-pltr]

Also highlighting that I'm not adding this type to

trino/lib/trino-filesystem-azure/src/main/java/io/trino/filesystem/azure/AzureFileSystemConfig.java

Lines 27 to 32 in d20c663

	public enum AuthType
	{
	ACCESS_KEY,
	OAUTH,
	DEFAULT,
	}

I think that this should be an internal auth type that cannot enabled by config. Though I appreciate this design of an internal, IRC-centred auth may be controversial.

[smaheshwar-pltr]

Setting sasToken with fallback in these flows aims to mirror https://github.com/apache/iceberg/blob/acd3e4657d2f4e6bfe4d092fa88dd362bb50fedc/azure/src/main/java/org/apache/iceberg/azure/AzureProperties.java#L160-L181

[ebyhr]

Please add a test.

[smaheshwar-pltr]

@ebyhr yes, sounds good! (Currently, still a WIP and completely untested)

While I have you here, may you elaborate on what sort of tests you'd like for this PR? I see TestIcebergTrinoRestCatalogConnectorSmokeTest and TestIcebergPolarisCatalogConnectorSmokeTest but not sure how doable wiring up such a test suite with an Azure storage IRC is.