Get resource with its name pattern or type?

[jianawu]

Hi,

I have a virtual network in a resource group with a name pattern like aks-vnet-XXX. The suffix of XXX is generated randomly.
As I do not know the name of this virtual network and I failed to retrieve it from the AKS cluster properties. I found it difficult to get reference to the virtual network.

I know, maybe I should create a vnet before the deployment of cluster. But till now, I do not have to do that.

There are two potential ways that I want to try:

1. Loop resources in a resource group and filter the resource by type of name pattern.
2. Straightly find the resource in the target resource group by the name pattern or the type.

Is that possible to achieve that?

Thank you!

[brwilkinson]

There could be a few approaches for this...

Would it work to go from a known resource name with something that references the VNET ?

I think you could find a reference from any of these

• app gateway
• cluster
• load balancer

Something like ...

resource cluster 'Microsoft.ContainerService/managedClusters@2022-05-02-preview' existing = {
  name: 'myCluster01'

  resource agentPool 'agentPools@2022-05-02-preview' existing = {
    name: 'myPool01'
  }
}

var subnetId = cluster::agentPool.properties.vnetSubnetID

output subnetId string = subnetId

[jianawu]

Thanks for your response! I have tried to find the subnetid from some of the references. I did not find a good way to achieve that.
My agentpool looks like:

{
    "id": "/subscriptions/e2108557-56b7-4d88-88e4-fdc4f0468d32/resourcegroups/cpc-rg-infra-dev/providers/Microsoft.ContainerService/managedClusters/cpc-aks-infra-dev/agentPools/agentpool0",
    "name": "agentpool0",
    "type": "Microsoft.ContainerService/managedClusters/agentPools",
    "properties": {
        "count": 1,
        "vmSize": "Standard_M16ms",
        "osDiskSizeGB": 128,
        "osDiskType": "Ephemeral",
        "kubeletDiskType": "OS",
        "maxPods": 110,
        "type": "VirtualMachineScaleSets",
        "maxCount": 50,
        "minCount": 1,
        "enableAutoScaling": true,
        "provisioningState": "Succeeded",
        "powerState": {
            "code": "Running"
        },
        "orchestratorVersion": "1.23.5",
        "enableNodePublicIP": false,
        "mode": "System",
        "enableEncryptionAtHost": false,
        "enableUltraSSD": false,
        "osType": "Linux",
        "osSKU": "Ubuntu",
        "nodeImageVersion": "AKSUbuntu-1804gen2containerd-2022.07.04",
        "enableFIPS": false
    }
}

It does not contain subnetid. Maybe I have to set it firstly and then I can get it from the agentpool?

I tried to find some of the resources and try to refer to subnetid. Unfortunately, I can only find it by kubenets -> backendAddressPools.properties.backendIPConfigurations ->get aks-agentpool0-12553159-vmss VMSS in the part of resource id ->get vnetid from aks-agentpool0-12553159-vmss

It is quite wired to get vnetid through this way.
Maybe there is a better path to refer to the vnet. But I have not find it till now.

[brwilkinson]

Hi @jianawu

Which network model do you use for AKS? CNI or kubenet ?

https://docs.microsoft.com/en-us/azure/aks/concepts-network#azure-virtual-networks

[jianawu]

Hi @jianawu

Which network model do you use for AKS? CNI or kubenet ?

https://docs.microsoft.com/en-us/azure/aks/concepts-network#azure-virtual-networks

Hi @brwilkinson , sorry for my late response. The network model is kubebet, the default one. I just created an AKS cluster and there are no more options for the network deployment.

[brwilkinson]

@jianawu

Here is the other option.

https://github.com/brwilkinson/AzureDeploymentFramework/blob/main/ADF/bicep/AKS-AKS.bicep#L205

[brwilkinson]

Here is the community call that has some demos on the new capabilities that are coming very soon.

https://www.youtube.com/watch?v=EEZvUqPSNgY&feature=youtu.be