envoy.yaml

static_resources:
    clusters:
        - name: echo_service
          connect_timeout: 0.25s
          type: logical_dns
          http2_protocol_options: {}
          lb_policy: round_robin
          hosts: [{ socket_address: { address: 167.172.8.114, port_value: 50211 }}]  # TO

    listeners:
        - name: listener_0
          address:
              socket_address: { address: 0.0.0.0, port_value: 11206 }  # FROM
          filter_chains:
              - filters:
                    - name: envoy.http_connection_manager
                      config:
                          codec_type: auto
                          stat_prefix: ingress_http
                          route_config:
                              name: local_route
                              virtual_hosts:
                                  - name: local_service
                                    domains: ["*"]
                                    routes:
                                        - match: { prefix: "/" }
                                          route:
                                              cluster: echo_service
                                              max_grpc_timeout: 0s
                                    cors:
                                        allow_origin_string_match:
                                            - safe_regex:
                                                  google_re2: {}
                                                  regex: \*
                                        allow_methods: GET, PUT, DELETE, POST, OPTIONS
                                        allow_headers: keep-alive,user-agent,cache-control,content-type,content-transfer-encoding,custom-header-1,x-accept-content-transfer-encoding,x-accept-response-streaming,x-user-agent,x-grpc-web,grpc-timeout
                                        max_age: "1728000"
                                        expose_headers: custom-header-1,grpc-status,grpc-message
                          http_filters:
                              - name: envoy.grpc_web
                              - name: envoy.cors
                              - name: envoy.router