Use VNet Peering Connections with Confluent Cloud on Azure

A VNet peering connection is a networking connection between your VNet and Confluent Cloud that enables you to route traffic using private IPv4 addresses. VNets can communicate with each other as if they are within the same network.

For more information about VNet peering with Azure, see Virtual Network Peering.

Important

Managed connectors created in a VPC-peered cluster can access data sources and sinks hosted in all peered VPCs, if the firewall rules allow connector traffic to and from the peered VPCs.

Prerequisites

• A Confluent Cloud network of type PEERING in Azure. If a network does not exist, see Confluent Cloud Network on Azure.

Limitations

• Transitive VNet peering is not supported. If you peer Network A to Network B, and peer Network B to Confluent Cloud, applications running in Network A will not be able to access Confluent Cloud.
• You can colocate multiple Confluent Cloud Dedicated clusters in the same Confluent Cloud network, but this is limited by the expected number and size of these clusters. The applicable limits are specified in Network.

Create a VNet peering connection

Note

• Confluent provides a Terraform configuration for creating a VNet peering connection. This configuration automates the manual steps described below.
• Cross-region peering is not supported through the Confluent Cloud Console. Contact Confluent Support to see if your regions are supported and to request configuration.

A peering connection has to be created from your VNet to the Confluent Cloud network in order to access Confluent Cloud clusters and services in a Confluent Cloud network.

Follow this procedure to create a VNet network peering connection for a Confluent Cloud cluster on Azure. You can have multiple VNet peering connections. For information about limits, see Kafka cluster quotas.

Confluent Cloud ConsoleREST APIs

1. In the Confluent Cloud Console, go to your Confluent Cloud network resource and click + VNet Peering.

2. Enter Name, Azure tenant ID, Azure subscription ID, Azure VNet Resource Group Name, and Azure VNet Name.

   Azure Tenant ID

   Represents an organization in Azure Active Directory. You can find this value in the Azure Portal under Azure Active Directory.

   Azure Subscription ID

   The unique identifier for your Azure subscription. You can find this in the Azure Portal on the Overview section of your |az| Virtual Network.

   Azure VNet resource group name

   The identifier for the Azure resource group that the virtual network belongs to. You can find this in the Azure Portal on the Overview section of your Azure Virtual Network.

   Azure VNet Name

   The name of your Azure virtual network. You can find this in the Azure Portal on the Overview section of your Azure Virtual Network.

3. Click Add. Your peering connection status will transition from “Pending” to “Error” in the Confluent Cloud Console. You must grant Confluent Cloud access to your Azure AD Tenant in the next step.

4. Grant access to your Azure AD Tenant.

   1. Go to the following URL using your AD tenant ID (<tenant-id>) and approve:

      https://login.microsoftonline.com/<tenant-id>/oauth2/authorize?client_id=f0955e3a-9013-4cf4-a1ea-21587621c9cc&response_type=code
      

   2. Run the following command with your subscription ID (<subscription-id>) to create a new role.

      Tip

      If you have more than one subscription ID, you must update the AssignableScopes.

      az role definition create --output none --role-definition "{
      \"Name\": \"Confluent Cloud Peering Creator\",
      \"Description\": \"Perform cross-tenant network peering.\",
      \"Actions\": [
          \"Microsoft.Network/virtualNetworks/read\",
          \"Microsoft.Network/virtualNetworks/virtualNetworkPeerings/read\",
          \"Microsoft.Network/virtualNetworks/virtualNetworkPeerings/write\",
          \"Microsoft.Network/virtualNetworks/virtualNetworkPeerings/delete\",
          \"Microsoft.Network/virtualNetworks/peer/action\"
      ],
      \"AssignableScopes\": [
          \"/subscriptions/<subscription-id>/\",
      ]
      }"
      

   3. Run this command with your subscription ID (<subscription-id>), VNet resource group name (<resource-group-name>), and VNet Name (<vnet-name>) specified to assign the role to the service principal:

      az role assignment create \
        --role "Confluent Cloud Peering Creator" \
        --assignee "$(az ad sp list --filter "appId eq 'f0955e3a-9013-4cf4-a1ea-21587621c9cc'" \
        --output tsv --query '[0].id')"  \
        --scope "/subscriptions/<subscription-id>/resourceGroups/<resource-group-name>/providers/Microsoft.Network/virtualNetworks/<vnet-name>"
      

      Note

      Starting with Azure CLI v. 2.37.0, the objectId property in the output JSON of a Graph object is replaced by id. If you use an earlier version, use objectId in the --output line.

   4. Click Continue. You are prompted to confirm that Confluent Cloud is present in your Azure AD Tenant.

   5. Click Create connection to finish creating the peering connection.

When you are finished, the VPC peering status should display “Active” in the Confluent Cloud Console.