envoy.yaml

static_resources:
  listeners:
  - name: listener_0
    address:
      socket_address: { address: 0.0.0.0, port_value: 1025 }
    filter_chains:
    - filters:
      - name: envoy.filters.network.http_connection_manager
        typed_config:
          "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
          stat_prefix: ingress_http
          codec_type: AUTO
          route_config:
            name: local_route
            virtual_hosts:
            - name: local_service
              domains: ["*"]
              routes:
              - match: { prefix: "/" }
                route: { cluster: grpc_service }
              cors:
                allow_origin_string_match:
                - safe_regex:
                    google_re2: {}
                    regex: ".*"
                allow_methods: "GET, PUT, DELETE, POST, OPTIONS"
                allow_headers: "keep-alive,user-agent,x-requested-with,if-modified-since,cache-control,content-type,authorization,grpc-timeout,x-user-agent,x-grpc-web,key"
                expose_headers: "custom-header1,grpc-status,grpc-message"
                max_age: "1728000"
          http_filters:
          - name: envoy.filters.http.cors
            typed_config:
              "@type": type.googleapis.com/envoy.extensions.filters.http.cors.v3.Cors
          - name: envoy.filters.http.grpc_http1_bridge
            typed_config:
              "@type": type.googleapis.com/envoy.extensions.filters.http.grpc_http1_bridge.v3.Config
          - name: envoy.filters.http.grpc_web
            typed_config:
              "@type": type.googleapis.com/envoy.extensions.filters.http.grpc_web.v3.GrpcWeb
          - name: envoy.filters.http.router
            typed_config:
              "@type": type.googleapis.com/envoy.extensions.filters.http.router.v3.Router

  clusters:
  - name: grpc_service
    connect_timeout: 0.25s
    type: LOGICAL_DNS
    # This is the cluster that handles gRPC traffic
    http2_protocol_options: {}
    load_assignment:
      cluster_name: grpc_service
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address: { address: 127.0.0.1, port_value: 50051 }
admin:
  access_log_path: "/tmp/admin_access.log"
  address:
    socket_address: { address: 0.0.0.0, port_value: 9901 }