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DockerCLI/docs/reference/commandline/network_inspect.md

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network inspect

Display detailed information on one or more networks

Options

Name Type Default Description
-f, --format string Format output using a custom template:
'json': Print in JSON format
'TEMPLATE': Print output using the given Go template.
Refer to https://docs.docker.com/go/formatting/ for more information about formatting output with templates
-v, --verbose Verbose output for diagnostics

Description

Returns information about one or more networks. By default, this command renders all results in a JSON object.

Examples

Inspect the bridge network

Connect two containers to the default bridge network:

$ sudo docker run -itd --name=container1 busybox
f2870c98fd504370fb86e59f32cd0753b1ac9b69b7d80566ffc7192a82b3ed27

$ sudo docker run -itd --name=container2 busybox
bda12f8922785d1f160be70736f26c1e331ab8aaf8ed8d56728508f2e2fd4727

The network inspect command shows the containers, by id, in its results. For networks backed by multi-host network driver, such as Overlay, this command also shows the container endpoints in other hosts in the cluster. These endpoints are represented as "ep-{endpoint-id}" in the output. However, for swarm mode networks, only the endpoints that are local to the node are shown.

You can specify an alternate format to execute a given template for each result. Go's text/template package describes all the details of the format.

$ sudo docker network inspect bridge

The output is in JSON format, for example:

[
  {
    "Name": "bridge",
    "Id": "b2b1a2cba717161d984383fd68218cf70bbbd17d328496885f7c921333228b0f",
    "Created": "2016-10-19T04:33:30.360899459Z",
    "Scope": "local",
    "Driver": "bridge",
    "IPAM": {
      "Driver": "default",
      "Config": [
        {
          "Subnet": "172.17.42.1/16",
          "Gateway": "172.17.42.1"
        }
      ]
    },
    "Internal": false,
    "Containers": {
      "bda12f8922785d1f160be70736f26c1e331ab8aaf8ed8d56728508f2e2fd4727": {
        "Name": "container2",
        "EndpointID": "0aebb8fcd2b282abe1365979536f21ee4ceaf3ed56177c628eae9f706e00e019",
        "MacAddress": "02:42:ac:11:00:02",
        "IPv4Address": "172.17.0.2/16",
        "IPv6Address": ""
      },
      "f2870c98fd504370fb86e59f32cd0753b1ac9b69b7d80566ffc7192a82b3ed27": {
        "Name": "container1",
        "EndpointID": "a00676d9c91a96bbe5bcfb34f705387a33d7cc365bac1a29e4e9728df92d10ad",
        "MacAddress": "02:42:ac:11:00:01",
        "IPv4Address": "172.17.0.1/16",
        "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": {}
  }
]

Inspect a user-defined network

Create and inspect a user-defined network:

$ docker network create simple-network

69568e6336d8c96bbf57869030919f7c69524f71183b44d80948bd3927c87f6a

$ docker network inspect simple-network

The output is in JSON format, for example:

[
  {
    "Name": "simple-network",
    "Id": "69568e6336d8c96bbf57869030919f7c69524f71183b44d80948bd3927c87f6a",
    "Created": "2016-10-19T04:33:30.360899459Z",
    "Scope": "local",
    "Driver": "bridge",
    "IPAM": {
      "Driver": "default",
      "Config": [
        {
          "Subnet": "172.22.0.0/16",
          "Gateway": "172.22.0.1"
        }
      ]
    },
    "Containers": {},
    "Options": {},
    "Labels": {}
  }
]

Inspect the ingress network

For swarm mode overlay networks network inspect also shows the IP address and node name of the peers. Peers are the nodes in the swarm cluster which have at least one task attached to the network. Node name is of the format <hostname>-<unique ID>.

$ docker network inspect ingress

The output is in JSON format, for example:

[
  {
    "Name": "ingress",
    "Id": "j0izitrut30h975vk4m1u5kk3",
    "Created": "2016-11-08T06:49:59.803387552Z",
    "Scope": "swarm",
    "Driver": "overlay",
    "EnableIPv6": false,
    "IPAM": {
      "Driver": "default",
      "Options": null,
      "Config": [
        {
          "Subnet": "10.255.0.0/16",
          "Gateway": "10.255.0.1"
        }
      ]
    },
    "Internal": false,
    "Attachable": false,
    "Containers": {
      "ingress-sbox": {
        "Name": "ingress-endpoint",
        "EndpointID": "40e002d27b7e5d75f60bc72199d8cae3344e1896abec5eddae9743755fe09115",
        "MacAddress": "02:42:0a:ff:00:03",
        "IPv4Address": "10.255.0.3/16",
        "IPv6Address": ""
      }
    },
    "Options": {
      "com.docker.network.driver.overlay.vxlanid_list": "256"
    },
    "Labels": {},
    "Peers": [
      {
        "Name": "net-1-1d22adfe4d5c",
        "IP": "192.168.33.11"
      },
      {
        "Name": "net-2-d55d838b34af",
        "IP": "192.168.33.12"
      },
      {
        "Name": "net-3-8473f8140bd9",
        "IP": "192.168.33.13"
      }
    ]
  }
]

View detailed information of a network (--verbose)

docker network inspect --verbose for swarm mode overlay networks shows service-specific details such as the service's VIP and port mappings. It also shows IPs of service tasks, and the IPs of the nodes where the tasks are running.

Following is an example output for an overlay network ov1 that has one service s1 attached to. service s1 in this case has three replicas.

$ docker network inspect --verbose ov1

The output is in JSON format, for example:

[
  {
    "Name": "ov1",
    "Id": "ybmyjvao9vtzy3oorxbssj13b",
    "Created": "2017-03-13T17:04:39.776106792Z",
    "Scope": "swarm",
    "Driver": "overlay",
    "EnableIPv6": false,
    "IPAM": {
      "Driver": "default",
      "Options": null,
      "Config": [
        {
          "Subnet": "10.0.0.0/24",
          "Gateway": "10.0.0.1"
        }
      ]
    },
    "Internal": false,
    "Attachable": false,
    "Containers": {
      "020403bd88a15f60747fd25d1ad5fa1272eb740e8a97fc547d8ad07b2f721c5e": {
        "Name": "s1.1.pjn2ik0sfgkfzed3h0s00gs9o",
        "EndpointID": "ad16946f416562d658f3bb30b9830d73ad91ccf6feae44411269cd0ff674714e",
        "MacAddress": "02:42:0a:00:00:04",
        "IPv4Address": "10.0.0.4/24",
        "IPv6Address": ""
      }
    },
    "Options": {
      "com.docker.network.driver.overlay.vxlanid_list": "4097"
    },
    "Labels": {},
    "Peers": [
      {
        "Name": "net-3-5d3cfd30a58c",
        "IP": "192.168.33.13"
      },
      {
        "Name": "net-1-6ecbc0040a73",
        "IP": "192.168.33.11"
      },
      {
        "Name": "net-2-fb80208efd75",
        "IP": "192.168.33.12"
      }
    ],
    "Services": {
      "s1": {
        "VIP": "10.0.0.2",
        "Ports": [],
        "LocalLBIndex": 257,
        "Tasks": [
          {
            "Name": "s1.2.q4hcq2aiiml25ubtrtg4q1txt",
            "EndpointID": "040879b027e55fb658e8b60ae3b87c6cdac7d291e86a190a3b5ac6567b26511a",
            "EndpointIP": "10.0.0.5",
            "Info": {
              "Host IP": "192.168.33.11"
            }
          },
          {
            "Name": "s1.3.yawl4cgkp7imkfx469kn9j6lm",
            "EndpointID": "106edff9f120efe44068b834e1cddb5b39dd4a3af70211378b2f7a9e562bbad8",
            "EndpointIP": "10.0.0.3",
            "Info": {
              "Host IP": "192.168.33.12"
            }
          },
          {
            "Name": "s1.1.pjn2ik0sfgkfzed3h0s00gs9o",
            "EndpointID": "ad16946f416562d658f3bb30b9830d73ad91ccf6feae44411269cd0ff674714e",
            "EndpointIP": "10.0.0.4",
            "Info": {
              "Host IP": "192.168.33.13"
            }
          }
        ]
      }
    }
  }
]

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