envoy proxy for frontend

envoy.yaml

admin:
  access_log_path: /tmp/admin_access.log
  address:
    socket_address: { address: 0.0.0.0, port_value: 9901 }

static_resources:
  listeners:
  - name: listener_http
    address:
      socket_address: { address: 0.0.0.0, port_value: 80 }
    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
          codec_type: auto
          stat_prefix: ingress_http
          route_config:
            name: redirect_route
            virtual_hosts:
            - name: backend
              domains:
              - "www.example.com"
              - "example.com"
              routes:
              - match:
                  prefix: "/"
                redirect:
                  https_redirect: true
          http_filters:
          - name: envoy.filters.http.router
            typed_config: {}
  - name: listener_https
    address:
      socket_address: { address: 0.0.0.0, port_value: 443 }
    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: backend_route
            virtual_hosts:
            - name: backend
              domains:
              - "www.example.com"
              - "example.com"
              routes:
              - match:
                  prefix: "/service/2"
                route:
                  prefix_rewrite: "/"
                  cluster: service2
                  hash_policy:
                    - cookie:
                        name: balanceid
                        ttl: 0s
              - match:
                  prefix: "/"
                route:
                  cluster: service1
              response_headers_to_add:
                - header:
                    key: "x-frame-options"
                    value: "sameorigin"
                - header:
                    key: "x-xss-protection"
                    value: "1; mode=block"
          http_filters:
          - name: envoy.filters.http.router
      tls_context:
        common_tls_context:
          tls_certificates:
            - certificate_chain:
                filename: "/etc/envoy/certs/example-com.crt"
              private_key:
                filename: "/etc/envoy/certs/example-com.key"
  clusters:
  - name: service1
    connect_timeout: 0.25s
    type: STRICT_DNS
    lb_policy: ROUND_ROBIN
    load_assignment:
      cluster_name: service1
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address:
                address: service1-1
                port_value: 8080
        - endpoint:
            address:
              socket_address:
                address: service1-2
                port_value: 8080
    health_checks:
      - timeout: 1s
        interval: 3s
        interval_jitter: 1s
        unhealthy_threshold: 1
        healthy_threshold: 1
        http_health_check:
          path: "/healthz"
  - name: service2
    connect_timeout: 0.25s
    type: STRICT_DNS
    lb_policy: RING_HASH
    load_assignment:
      cluster_name: service2
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address:
                address: service2-1
                port_value: 8080
        - endpoint:
            address:
              socket_address:
                address: service2-2
                port_value: 8080