HttpFilter CRD

EnRoute Technical Reference

HttpFilter CRD #

A HttpFilter provides a mechanism to add additional policy logic that applies to all routes. HttpFilters are global and do not need to be associated with GatewayHost or a ServiceRoute

An example HttpFilter to run some lua code per-route can be specified using -

apiVersion: enroute.saaras.io/v1beta1
kind: HttpFilter
metadata:
  labels:
    app: httpbin
  name: luafilter
  namespace: httpbin
spec:
  name: luafilter
  type: http_filter_lua
  httpFilterConfig:
    config: |
        function envoy_on_request(request_handle)
           request_handle:logInfo("Hello World request httpbin");
        end

        function envoy_on_response(response_handle)
           response_handle:logInfo("Hello World response httpbin");
        end
---

This lua filter is invoked for all HTTP traffic.

HttpFilter to Envoy configuration #

HttpFilter configuration influences the Envoy Listenerconfigurations.

Envoy needs Listener configuration to create listeners for VirtualHost, Route and Cluster. By default, an ingress_http and ingress_https listeners are created.

Complete ServiceRoute CRD Spec #

A complete description of the HttpFilter CRD spec is located in github