Document azure support for load-balancer-ip (#708)

docs/user-guide/ingress/README.md

@@ -125,7 +125,7 @@ Below is the full list of supported annotation keys, [voyager also support stand
 |--------|-----------|----------|--------------|
 | ingress.appscode.com/type | LoadBalancer, HostPort, NodePort, Internal | LoadBalancer | `Required`. Indicates type of service used to expose HAProxy to the internet |
 | ingress.appscode.com/replicas | integer | 1 | `Optional`. Indicates number of replicas of HAProxy pods |
-| ingress.appscode.com/load-balancer-ip | string | x | `Optional`. For "gce" and "gke" cloud provider, if this value is set to a valid IPv4 address, it will be assigned to Google cloud network loadbalancer used to expose HAProxy. Usually this is set to a static IP to preserve DNS configuration |
+| ingress.appscode.com/load-balancer-ip | string | x | `Optional`. For "gce", "gke", "azure", "acs" cloud provider, if this value is set to a valid IPv4 address, it will be assigned to loadbalancer used to expose HAProxy. The IP should be pre-allocated in cloud provider account but not assigned to the load-balancer. Usually this is set to a static IP to preserve DNS configuration |
 | ingress.appscode.com/node-selector | map | x | Indicates which hosts are selected to run HAProxy pods. This is a recommended annotation for `HostPort` type ingress. |
 | ingress.appscode.com/sticky-session | bool | false | `Optional`. Indicates the session affinity for the traffic. If set, session affinity will apply to all the rulses. |
 | ingress.appscode.com/annotations-service | map | x | `Optional`. Annotaiotns applied to service used to expose HAProxy |