How to run
Azure locally.

Hitting real Azure during development needs a subscription, credentials and a network. Running it locally removes all three. There are two common ways to do it.

Your options at a glance

• Azurite — Microsoft’s official emulator for Azure Storage (Blob, Queue, Table). Excellent and accurate, but storage-only and Azure-only. (Vyomi vs Azurite →)
• Vyomi — the Multi-Cloud Digital Twin Runtime. It embeds Azurite for Azure Blob and adds Cosmos DB, queues and the rest of GCP and AWS around it, behind one endpoint with native consoles and Terraform export. (See the full landscape →)

This guide uses Vyomi, because the same steps then work for AWS and GCP too.

Step by step

1Install & start

brew install vyomi-cloud/tap/vyomi   # or: docker run -p 9000:9000 vyomi/appliance
vyomi up

Vyomi now answers Azure API calls at http://localhost:9000.

2Blob Storage (azure-storage-blob)

from azure.storage.blob import BlobServiceClient
svc = BlobServiceClient(account_url="http://localhost:9000", credential="test")
container = svc.create_container("demo")
container.upload_blob(name="hello.txt", data=b"hi from local Azure")
print([b.name for b in container.list_blobs()])

3Cosmos DB (azure-cosmos)

from azure.cosmos import CosmosClient
client = CosmosClient("http://localhost:9000", credential="test")
db = client.create_database_if_not_exists("app")
container = db.create_container_if_not_exists(id="users", partition_key="/id")
container.upsert_item({"id": "u1", "name": "Ada"})

4Drive it with Terraform

Point the azurerm provider at the local endpoint, then terraform apply. When you’re ready for production, Vyomi can export the running stack back to HCL.

provider "azurerm" {
  features {}
  storage_use_azuread = false
  # endpoint overrides point at the local Vyomi appliance
}

Going multi-cloud

Because Vyomi runs AWS and GCP from the same appliance, the identical pattern — change the endpoint, keep the SDK — works for boto3 and google-cloud-storage too. That’s the difference between a single-cloud storage emulator and a full multi-cloud digital twin.