如何修复Docker中的'EHOSTUNREACH'错误？

Question

我正在尝试使用Docker运行一些NightWatch测试，但似乎在CentOS上给我一个错误。当我在MacOS上尝试时，它会起作用。

我尝试更改端口，但这似乎不是问题。

终端错误

POST http://172.17.0.1:4445 /wd/hub/session - EHOSTUNREACH
Error: connect EHOSTUNREACH 172.17.0.1:4445
   An error occurred while retrieving a new session: "connect EHOSTUNREACH 172.17.0.1:4445"
       at Socket.socketErrorListener (_http_client.js:392:9)
       at emitErrorNT (internal/streams/destroy.js:82:8)
       at emitErrorAndCloseNT (internal/streams/destroy.js:50:3)
       at process._tickCallback (internal/process/next_tick.js:63:19)

Docker网络检查桥（在CentOS和MacOS中同样显示）

[
    {
        "Name": "bridge",
        "Id": "e18423aca6d4680052b2e28ef8c58e1d7c9c5cff2d072ac7cbeaea36bdfaa038",
        "Created": "2019-05-17T16:55:37.595166623-04:00",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": null,
            "Config": [
                {
                    "Subnet": "172.17.0.0/16",
                    "Gateway": "172.17.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "7f6139e7dc36a944b568283967d08aa9e2410e5b2c9f28ef379ce989254fe57b": {
                "Name": "selenium-firefox",
                "EndpointID": "e7c61e93ff0abe2e8b55eeea9315ccc2de79bbaf733f27aaad2e63b1eb1bc620",
                "MacAddress": "02:42:ac:11:00:02",
                "IPv4Address": "172.17.0.2/16",
                "IPv6Address": ""
            }
        },
        "Options": {
            "com.docker.network.bridge.default_bridge": "true",
            "com.docker.network.bridge.enable_icc": "true",
            "com.docker.network.bridge.enable_ip_masquerade": "true",
            "com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
            "com.docker.network.bridge.name": "docker0",
            "com.docker.network.driver.mtu": "1500"
        },
        "Labels": {}
    }
]

Nightwatch.json文件

{
  "src_folders": ["./tests"],
  "output_folder": "./results",
  "custom_commands_path": "./commands",
  "custom_assertions_path": "./assertions",
  "page_objects_path": "",
  "globals_path": "",

  "test_workers": {
    "enabled": true,
    "workers": "auto"
  },

  "selenium": {
    "start_process": false
  },

  "test_settings": {
    "default": {
      "selenium_port": 4445,
      "selenium_host": "172.17.0.1",
      "desiredCapabilities": {
        "browserName": "firefox",
        "javascriptEnabled": true,
        "acceptSslCerts": true
      },
      "end_session_on_fail": false,
      "skip_testcases_on_fail": false
    },
    "safari": {
      "desiredCapabilities": {
        "browserName": "safari"
      }
    },
    "firefox": {
      "desiredCapabilities": {
        "browserName": "firefox",
        "marionette": true
      }
    },
    "chrome": {
      "desiredCapabilities": {
        "browserName": "chrome",
        "javascriptEnabled": true,
        "acceptSslCerts": true,
        "chromeOptions" : {
          "args" : ["--no-sandbox"]
        }
      }
    }
  }
}

Docker容器

0.0.0.0:4445->4444/tcp   selenium-firefox

我希望它可以连接到selenium-firefox容器并运行测试。