example envoy --config-path <path> file

10-s.json

{
 "staticResources": {
  "listeners": [
   {
    "name": "listener0",
    "address": {
     "socketAddress": {
      "address": "0.0.0.0",
      "portValue": 26300
     }
    },
    "filterChains": [
     {
      "filters": [
       {
        "name": "envoy.http_connection_manager",
        "config": {
         "statPrefix": "router",
         "routeConfig": {
          "name": "route0",
          "virtualHosts": [
           {
            "routes": [
             {
              "route": {
               "cluster": "cluster0"
              },
              "match": {
               "prefix": "/route0_virtualhost0_match0"
              }
             }
            ],
            "domains": [
             "route0-virtualhost0-domain0.com"
            ],
            "name": "route0_virtualhost0"
           }
          ]
         },
         "httpFilters": [
          {
           "config": {
            "deprecated_v1": true
           },
           "name": "envoy.router"
          }
         ]
        }
       }
      ]
     }
    ]
   }
  ],
  "clusters": [
   { "name": "cluster0", "connectTimeout": "5s", "hosts": [ { "socketAddress": { "address": "::", "portValue": 0 } } ] },
   { "name": "cluster1", "connectTimeout": "5s", "hosts": [ { "socketAddress": { "address": "::1", "portValue": 0 } } ] },
   { "name": "cluster2", "connectTimeout": "5s", "hosts": [ { "socketAddress": { "address": "::2", "portValue": 0 } } ] },
   { "name": "cluster3", "connectTimeout": "5s", "hosts": [ { "socketAddress": { "address": "::3", "portValue": 0 } } ] },
   { "name": "cluster4", "connectTimeout": "5s", "hosts": [ { "socketAddress": { "address": "::4", "portValue": 0 } } ] },
   { "name": "cluster5", "connectTimeout": "5s", "hosts": [ { "socketAddress": { "address": "::5", "portValue": 0 } } ] },
   { "name": "cluster6", "connectTimeout": "5s", "hosts": [ { "socketAddress": { "address": "::6", "portValue": 0 } } ] },
   { "name": "cluster7", "connectTimeout": "5s", "hosts": [ { "socketAddress": { "address": "::7", "portValue": 0 } } ] },
   { "name": "cluster8", "connectTimeout": "5s", "hosts": [ { "socketAddress": { "address": "::8", "portValue": 0 } } ] },
   { "name": "cluster9", "connectTimeout": "5s", "hosts": [ { "socketAddress": { "address": "::9", "portValue": 0 } } ] }
  ]
 },
 "admin": {
  "accessLogPath": "/dev/null",
  "address": {
   "socketAddress": {
    "address": "0.0.0.0",
    "portValue": 10000
   }
  }
 }
}