envoy grpc bridge

envoy.json

{
  "listeners": [
    {
      "address": "tcp://0.0.0.0:5050",
      "filters": [
        {
          "type": "read",
          "name": "http_connection_manager",
          "config": {
            "codec_type": "auto",
            "stat_prefix": "test",
            "access_log": [
              {
                "path": "/tmp/grpc-ea-r.log"
              }
            ],
            "route_config": {
              "virtual_hosts": [
                {
                  "name": "backend",
                  "domains": [
                    "*"
                  ],
                  "routes": [
                    {
                      "prefix": "/",
                      "cluster": "hello-world",
                      "timeout_ms": 15000,
                      "retry_policy": {
                        "retry_on": "5xx,connect-failure",
                        "num_retries": 2,
                        "per_try_timeout_ms": 6000
                      }
                    }
                  ]
                }
              ]
            },
            "filters": [
              {
                "type": "decoder",
                "name": "router",
                "config": {}
              },
              {
                "type": "both",
                "name": "grpc_http1_bridge",
                "config": {}
              }
            ],
            "idle_timeout_s": 60
          }
        }
      ]
    }
  ],
  "cluster_manager": {
    "clusters": [
      {
        "name": "hello-world",
        "type": "static",
        "connect_timeout_ms": 10000,
        "lb_type": "round_robin",
        "hosts": [
          {
            "url": "tcp://127.0.0.1:5000"
          },
          {
            "url": "tcp://127.0.0.1:5001"
          }
        ],
        "features": "http2",
        "circuit_breakers": {
          "default": {
            "max_connections": 1024,
            "max_pending_requests": 1024,
            "max_requests": 1024,
            "max_retries": 9
          }
        }
      }
    ]
  },
  "admin": {
    "access_log_path": "/tmp/admin-access-r.log",
    "profile_path": "/tmp/cpu.prof",
    "address": "tcp://0.0.0.0:6457"
  }
}