I can't make aks-engine create load balancer for agent pool, service stays in 'pending' state forever.

kubectl get svc -w
NAME         TYPE           CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE
kubernetes   ClusterIP      10.0.0.1       <none>        443/TCP        16m
nginx        LoadBalancer   10.0.249.248   <pending>     80:31190/TCP   13s

I can see only load balancer for master in the resource group. It's all deployed with pretty generic aks-engine generate examples/kubernetes-custom-vnet.json (just using existing vnet) and then ARM templates