How to Create an Azure Cosmos DB Account Easily

To create a Cosmos DB account in Azure, use the az cosmosdb create command with your resource group, account name, and API type. This sets up a globally distributed, multi-model database service ready for your applications.

Syntax

The basic command to create a Cosmos DB account using Azure CLI is:

• az cosmosdb create --name <account-name> --resource-group <resource-group-name> --kind <api-kind> --locations regionName=<region> --default-consistency-level <consistency>

Explanation of parts:

• --name: Your unique Cosmos DB account name.
• --resource-group: The Azure resource group to contain the account.
• --kind: The API type, like GlobalDocumentDB for SQL API or MongoDB for MongoDB API.
• --locations: The Azure region(s) where the account is created.
• --default-consistency-level: Consistency model like Session, Strong, or Eventual.

bash

az cosmosdb create --name MyCosmosAccount --resource-group MyResourceGroup --kind GlobalDocumentDB --locations regionName=eastus --default-consistency-level Session

Example

This example creates a Cosmos DB account named mycosmosdb123 in the eastus region using the SQL API with session consistency.

bash

az cosmosdb create --name mycosmosdb123 --resource-group myResourceGroup --kind GlobalDocumentDB --locations regionName=eastus --default-consistency-level Session

Output

The Cosmos DB account 'mycosmosdb123' was created successfully in resource group 'myResourceGroup'.

Common Pitfalls

Common mistakes when creating a Cosmos DB account include:

• Using an account name that is already taken. Account names must be globally unique.
• Not specifying the correct --kind for the API you want (e.g., SQL, MongoDB, Cassandra).
• Forgetting to create or specify an existing resource group.
• Choosing unsupported or unavailable regions.
• Not setting the consistency level according to your app needs, which can affect performance and cost.

bash

az cosmosdb create --name mycosmosdb123 --resource-group myResourceGroup --kind MongoDB --locations regionName=westus

# Correct way:
az cosmosdb create --name mycosmosdb123 --resource-group myResourceGroup --kind GlobalDocumentDB --locations regionName=westus

Quick Reference

Tips for creating Cosmos DB accounts:

• Always check name availability before creating.
• Use az group create to create a resource group if needed.
• Pick the API kind that matches your app data model.
• Choose regions close to your users for low latency.
• Set consistency level balancing speed and data accuracy.

Key Takeaways

Use the Azure CLI command az cosmosdb create with required parameters to create a Cosmos DB account.

Ensure your account name is unique and specify the correct API kind for your application.

Create or use an existing resource group before creating the account.

Select appropriate regions and consistency levels based on your app needs.

Check for common errors like name conflicts and unsupported regions to avoid failures.