envoy.yaml

static_resources:
  listeners:
  - name: listener_h2c_or_h1
    address:
      socket_address: { address: 0.0.0.0, port_value: 7860 }  # start.sh přepíše na $PORT
    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: local_hcm
          codec_type: AUTO                 # přijme HTTP/1.1 i h2c (curl, healthcheck i gRPC)
          http2_protocol_options: {}
          route_config:
            name: local_route
            virtual_hosts:
            - name: backend
              domains: ["*"]
              routes:
              # Zdraví (jednoduchý 200 OK, aby HF healthcheck nepadal)
              - match: { prefix: "/healthz" }
                direct_response:
                  status: 200
                  body: { inline_string: "ok\n" }
              # Přepošli vše ostatní do gRPC serveru (HTTP/2 upstream)
              - match: { prefix: "/" }
                route:
                  cluster: dt_grpc
                  timeout: 0s
          http_filters:
            - name: envoy.filters.http.router
              typed_config:
                "@type": type.googleapis.com/envoy.extensions.filters.http.router.v3.Router

  clusters:
  - name: dt_grpc
    type: STATIC
    load_assignment:
      cluster_name: dt_grpc
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address:
                address: 127.0.0.1
                port_value: 7859          # start.sh přepíše pokud změníš GRPC_PORT
    # Upstream do gRPC serveru = HTTP/2 (bez TLS, lokální loopback)
    http2_protocol_options: {}

admin:
  address:
    socket_address: { address: 127.0.0.1, port_value: 9901 }