AKS using AZURE CNI looking for routable to connect to the application gateway.

[Gomolemo-Matsunyane]

I am using Azure CNI with AKS which does not require route table to communicate with Appgateway but for some it is looking for it.

I am unable to push listerners to the appgateway.

I0219 09:44:18.238528 1 utils.go:113] Using verbosity level 3 from environment variable APPGW_VERBOSITY_LEVEL
I0219 09:44:18.263718 1 supported_apiversion.go:70] server version is: 1.28.0
I0219 09:44:18.273271 1 main.go:118] Using User Agent Suffix='agic-release-ingress-azure-b98b87d78-v4p6t' when communicating with ARM
I0219 09:44:18.273402 1 main.go:137] Application Gateway Details: Subscription="68e2c2bc-d237-4589-933d-974f46f2fb66" Resource Group="BVB-aksinfra-prod-rg" Name="BVB-AppGateway-Prod"
I0219 09:44:18.273510 1 auth.go:42] Creating authorizer from file referenced by environment variable: /etc/Azure/Networking-AppGW/auth/armAuth.json
I0219 09:44:18.273472 1 httpserver.go:57] Starting API Server on :8123
I0219 09:44:18.273596 1 client.go:133] Getting Application Gateway configuration.
I0219 09:44:19.894129 1 main.go:186] Ingress Controller will observe the following namespaces:agic
I0219 09:44:20.707566 1 client.go:250] Error getting route table '/subscriptions/68e2c2bc-d237-4589-933d-974f46f2fb66/resourceGroups/MC_BVB-aksinfra-prod-rg_BVB-AKS-Prod_southafricanorth/providers/Microsoft.Network/routeTables/aks-agentpool-33671859-routetable' (this is relevant for AKS clusters using 'Kubenet' network plugin): network.RouteTablesClient#Get: Failure responding to request: StatusCode=404 -- Original Error: autorest/azure: Service returned an error. Status=404 Code="ResourceNotFound" Message="The Resource 'Microsoft.Network/routeTables/aks-agentpool-33671859-routetable' under resource group 'MC_BVB-aksinfra-prod-rg_BVB-AKS-Prod_southafricanorth' was not found. For more details please go to https://aka.ms/ARMResourceNotFoundFix"
I0219 09:44:20.707593 1 context.go:172] k8s context run started
I0219 09:44:20.707621 1 context.go:239] Waiting for initial cache sync
I0219 09:44:20.707716 1 reflector.go:296] Starting reflector *v1beta1.AzureApplicationGatewayRewrite (30s) from pkg/mod/k8s.io/[email protected]/tools/cache/r

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Action required from @aritraghosh, @julia-yin, @AllenWen-at-Azure