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Configuration deployments in Azure Virtual Network Manager

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In this article, you learn about how configurations are applied to your network resources. Also, you explore how updating a configuration deployment is different for each membership type. Then we go into details about Deployment status and Goal state model.

Deployment

Deployment is the method Azure Virtual Network Manager uses to apply configurations to your virtual networks in network groups. Configurations don't take effect until they're deployed. When a deployment request is sent to Azure Virtual Network Manager, it calculates the goal state of all resources under your network manager in that region. Goal state is a combination of deployed configurations and network group membership. Network manager applies the necessary changes to your infrastructure.

When committing a deployment, you select the region(s) to which the configuration applies. The length of time for a deployment depends on how large the configuration is. Once the virtual networks are members of a network group, deploying a configuration onto that network group takes a few minutes. This includes adding or removing group members directly, or configuring an Azure Policy resource. Safe deployment practices recommend gradually rolling out changes on a per-region basis.

Important

Only one security configuration can be deployed to a region. However, multiple connectivity configurations can exist in a region. To deploy multiple security admin configurations to a region, you can create multiple rule collections in a security configuration, instead of creating multiple security admin configurations.

Deployment latency

Deployment latency is the time it takes for a deployment configuration to be applied and take effect. There are two factors in how quickly the configurations are applied:

  • The base time of applying a configuration is a few minutes.

  • The time to receive a notification of network group membership can vary.

For manually added members, notification is immediate. For dynamic members where the scope is less than 1000 subscriptions, notification takes a few minutes. In environments with more than 1000 subscriptions, the notification mechanism works in a 24-hour window. Changes to network groups take effect without the need for configuration redeployment.

Virtual network manager applies the configuration to the virtual networks in the network group even if your network group consists of dynamic members from more than 1000 subscriptions. When the virtual network manager is notified of group membership, the configuration is applied in a few minutes.

Deployment status

When you commit a configuration deployment, the API does a POST operation. Once the deployment request is made, Azure Virtual Network Manager calculates the goal state of your networks in the deployed regions and request the underlying infrastructure to make the changes. You can see the deployment status on the Deployment page of the Virtual Network Manager.

Screenshot of deployment in progress in deployment list.

Goal state model

When you commit a deployment of configuration(s), you're describing the goal state of your network manager in that region. This goal state is enforced during the next deployment. For example, when you commit configurations named Config1 and Config2 into a region, these two configurations get applied and become the region's goal state. If you decided to commit configuration named Config1 and Config3 into the same region, Config2 would then be removed, and Config3 would be added. To remove all configurations, you would deploy a None configuration against the region(s) you no longer wish to have any configurations applied.

Configuration availability

A virtual network manager instance is available in a region as long as the region is up and running. Should a region with a virtual network manager go down, the virtual network manager instance is no longer available for deploying new configurations or editing current configurations. However, the configurations that were deployed to the virtual networks in the network group are still in effect unless those virtual networks are in the region that went down.

For example, if an Azure Virtual Network Manager instance is created in region A and programs the VNets in region B, the configurations are still in effect even if region A goes down. However, if region B goes down, the configurations are no longer in effect. Also, you can't create new configurations or edit current configurations for virtual networks in region B.

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