Envoy configuration for handling gRPC and HTTP requests to the same port

envoy.yaml

# =============================================================================
# This Envoy configuration allows gRPC and HTTP/2 connections to be sent to the
# same port. The URL to the gRPC service must be prefixed with "/grpc", for
# instance "http://192.168.1.10/grpc" and will be directed to port 8082. The
# normal HTTP/2 calls will be directed to port 8084.
# =============================================================================

admin:
  access_log_path: /tmp/admin_access.log
  address:
    socket_address: { address: 0.0.0.0, port_value: 8086 }

static_resources:
  listeners:
  - name: listener
    address:
      socket_address: { address: 0.0.0.0, port_value: 8085 }
    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: "/grpc/" }
                route:
                  cluster: sima_runtime_grpc
                  prefix_rewrite: "/"
                  max_grpc_timeout: 0s
              - match: { prefix: "/" }
                route:
                  cluster: sima_runtime_http
              cors:
                allow_origin:
                - "*"
                allow_methods: GET, PUT, DELETE, POST, OPTIONS
                allow_headers: keep-alive,user-agent,cache-control,content-type,content-transfer-encoding,x-accept-content-transfer-encoding,x-accept-response-streaming,x-user-agent,x-grpc-web,grpc-timeout,jwt
                max_age: "1728000"
                expose_headers: grpc-status,grpc-message,jwt
          http_filters:
          - name: envoy.grpc_web
          - name: envoy.cors
          - name: envoy.router
          
  clusters:
  - name: sima_runtime_grpc
    connect_timeout: 0.25s
    type: logical_dns
    http2_protocol_options: {}
    lb_policy: round_robin
    # win/mac hosts: Use address: host.docker.internal 
    # instead of address: localhost in the line below
    hosts: [{ socket_address: { address: 127.0.0.1, port_value: 8082 }}]
  - name: sima_runtime_http
    connect_timeout: 0.25s
    type: logical_dns
    lb_policy: round_robin
    # win/mac hosts: Use address: host.docker.internal 
    # instead of address: localhost in the line below
    hosts: [{ socket_address: { address: 127.0.0.1, port_value: 8084 }}]