Azure Kubernetes (AKS) SDN connector

Azure SDN connectors support dynamic address groups based on Azure Kubernetes (AKS) filters.

To filter out the Kubernetes IP addresses, the following address filters have been introduced:

k8s_cluster	Kubernetes cluster name.
k8s_namespace	Namespace of a Kubernetes service or pod.
k8s_svcname	Kubernetes service name.
k8s_nodename	Kubernetes node name.
k8s_region	Kubernetes node region.
k8s_podname	Kubernetes pod name.
k8s_label.xxx	Name of label of a Kubernetes resource (cluster/service/node/Pod).

To enable an Azure SDN connector to fetch IP addresses from Azure Kubernetes:

1. Configure the Azure SDN connector:
   1. Go to Security Fabric > External Connectors.
   2. Click Create New, and select Azure.
   3. Configure as shown substituting the region, tenant and client IDs, and client secret for your deployment. The update interval is in seconds.

      

2. Create a dynamic firewall address for the configured K8s SDN connector:
   1. Go to Policy & Objects > Addresses.
   2. Click Create New, then select Address.
   3. Configure the address as shown, selecting the desired filter in the Filter dropdown list. In this example, the Azure SDN connector will automatically populate and update IP addresses only for instances that belong to the zhmKC cluster:

      

3. Ensure that the K8s SDN connector resolves dynamic firewall IP addresses:
   1. Go to Policy & Objects > Addresses.
   2. Hover over the address created in step 2 to see a list of IP addresses for instances that belong to the zhmKC cluster as configured in step 2:

      

To configure an Azure Kubernetes SDN connector through the CLI:

1. Configure an SDN connector for Kubernetes:

   config system sdn-connector

   edit "azure1"

   set type azure

   set tenant-id "942b80cd-1b14-42a1-8dcf-4b21dece61ba"

   set client-id "14dbd5c5-307e-4ea4-8133-68738141feb1"

   set client-secret xxxxx

   set update-interval 30

   next

   end

2. Create a dynamic firewall address for the SDN connector with a supported Kubernetes filter. In this example, the Azure SDN connector will automatically populate and update IP addresses only for instances that belong to the zhmKC cluster:

   config firewall address

   edit "az-k8s-cluster"

   set type dynamic

   set sdn "azure1"

   set filter "K8S_Cluster=zhmKC"

   next

   end

3. Confirm that the Azure SDN connector resolves dynamic firewall IP addresses using the configured filter:

   config firewall address

   edit "az-k8s-cluster"

   set type dynamic

   set sdn "azure1"

   set filter "K8S_Cluster=zhmKC"

   config list

   edit "10.240.0.4"

   next

   edit "10.240.0.5"

   next

   edit "10.244.0.10"

   next

   end

   next

   end