用於通信2個Docker容器的IP地址是什么？

Question

我有2個Docker容器，它們使用docker網絡連接。 我兩次運行以下命令。

docker network connect [network id] [container id]

第一個容器需要通過HTTP與第二個容器進行通信。

我將IP設置為172.17.0.1，但看起來IP錯誤。

我相信這是那些經驗豐富的Docker用戶的常見問題。

誰能幫我？

問候，吉米

Answer 1

可能是容器未連接到網絡的情況。 為了進行檢查，您可以檢查容器連接到的網絡，以便它們可以通信。 使用命令docker network inspect network_name

如果網絡是默認的網橋，則在將容器連接到它之前，您可以看到以下o / p：

[
   {
       "Name": "bridge",
       "Id": "f7ab26d71dbd6f557852c7156ae0574bbf62c42f539b50c8ebde0f728a253b6f",
       "Scope": "local",
       "Driver": "bridge",
       "IPAM": {
           "Driver": "default",
           "Config": [
               {
                   "Subnet": "172.17.0.1/16",
                   "Gateway": "172.17.0.1"
               }
           ]
       },
       "Containers": {},
       "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": "9001"
       },
       "Labels": {}
   }
]

一旦連接了兩個容器，則o / p將如下所示：

{[
    {
        "Name": "bridge",
        "Id": "f7ab26d71dbd6f557852c7156ae0574bbf62c42f539b50c8ebde0f728a253b6f",
        "Scope": "local",
        "Driver": "bridge",
        "IPAM": {
            "Driver": "default",
            "Config": [
                {
                    "Subnet": "172.17.0.1/16",
                    "Gateway": "172.17.0.1"
                }
            ]
        },
        "Containers": {
            "3386a527aa08b37ea9232cbcace2d2458d49f44bb05a6b775fba7ddd40d8f92c": {
                "EndpointID": "647c12443e91faf0fd508b6edfe59c30b642abb60dfab890b4bdccee38750bc1",
                "MacAddress": "02:42:ac:11:00:02",
                "IPv4Address": "172.17.0.2/16",
                "IPv6Address": ""
            },
            "94447ca479852d29aeddca75c28f7104df3c3196d7b6d83061879e339946805c": {
                "EndpointID": "b047d090f446ac49747d3c37d63e4307be745876db7f0ceef7b311cbba615f48",
                "MacAddress": "02:42:ac:11:00:03",
                "IPv4Address": "172.17.0.3/16",
                "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": "9001"
        },
        "Labels": {}
    }
]

如您所見，o / p中有兩個容器的ip地址。

現在，您可以連接到容器，並嘗試ping其他容器以查看它們是否可以通信。

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