/envoy-filter-example

Primary LanguageC++

Envoy filter example

This project demonstrates the linking of additional HTTP filters with the Envoy binary. A new filter sample which adds a HTTP header is introduced. Integration tests demonstrating the filter's end-to-end behavior are also provided.

Building

To build the Envoy static binary:

  1. git submodule update --init
  2. bazel build //:envoy

Sample config

admin:
  access_log_path: /tmp/admin_access.log
  address:
    socket_address:
      protocol: TCP
      address: 0.0.0.0
      port_value: 9901
static_resources:
  listeners:
  - name: listener_0
    address:
      socket_address:
        protocol: TCP
        address: 0.0.0.0
        port_value: 10000
    filter_chains:
    - filters:
      - name: envoy.http_connection_manager
        typed_config:
          "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
          stat_prefix: ingress_http
          route_config:
            name: local_route
            virtual_hosts:
            - name: local_service
              domains: ["*"]
              routes:
              - match:
                  prefix: "/"
                route:
                  cluster: netty-backend
          http_filters:
          - name: envoy.mgw
            typed_config:
                "@type": type.googleapis.com/envoy.extensions.filters.http.mgw.v3.MGW
                request:
                    grpc_service:
                        envoy_grpc:
                          cluster_name: go-req-filter 
                response:
                    grpc_service:
                        envoy_grpc:
                          cluster_name: go-res-filter
          - name: envoy.router
            typed_config: 
              "@type": type.googleapis.com/envoy.extensions.filters.http.router.v3.Router
              
  clusters:
  - name: go-req-filter
    type: static
    connect_timeout: 600s
    http2_protocol_options: {}
    type: STRICT_DNS
    load_assignment:
      cluster_name: go-req-filter
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address:
                address: 0.0.0.0
                port_value: 8081
  - name: go-res-filter
    type: static
    http2_protocol_options: {}
    type: STRICT_DNS
    load_assignment:
      cluster_name: go-res-filter
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address:
                address: 0.0.0.0
                port_value: 8082
    connect_timeout: 600s
  - name: netty-backend
    connect_timeout: 300s
    type: LOGICAL_DNS
    # Comment out the following line to test on v6 networks
    dns_lookup_family: V4_ONLY
    lb_policy: ROUND_ROBIN
    load_assignment:
      cluster_name: netty-backend
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address:
                address: 0.0.0.0
                port_value: 8688
    connect_timeout: 600s