Is it possible to use the Google Cloud Data Catalog to catalog an Azure Data Lake, Blob storage or Azure SQL Database?
Currently Google cloud Data catalog doesnot support Azure services directly. But it supports creating custom Data Catalog entries, with this we can ingest any metadata from anywhere.
https://cloud.google.com/data-catalog/docs/how-to/custom-entries
Also they developed some sample connectors, similarly you can build connectors for AWS services. https://github.com/GoogleCloudPlatform/datacatalog-connectors
Sample