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【Docker】任意で作成したdriver=bridgeネットワークを設定してdocker runしてみるメモ

はじめに

ちょこちょこDockerを触っているのですがネットワーク設定まわりについての自分用メモ
以下の書籍を参考にしています。

アジェンダ

  1. やりたいこと
  2. Dockerコンテナのネットワークのプチ基礎
  3. ネットワークを作成する
  4. 複数のContainer同士で繋いでみる
  5. ネットワークを削除する

1. やりたいこと

やりたい事は以下です

  • dockerのネットワークを作成する
  • 複数のcontainerを作成した同一ネットワークに接続
  • container同士でアクセスする

2. Dockerコンテナのネットワークのプチ基礎

Dockerはデフォルトでbridge/host/noneの3つのネットワークを作成します

$ docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
b917ccb08e42        bridge              bridge              local
45c4f50ef8dd        host                host                local
e1785a610499        none                null                local

明示的にネットワークを指定せずにDockerコンテナを起動すると、
デフォルトのbridgeネットワークにDockerコンテナを起動します。

# 適当に立ち上げてみる
$ docker container run -itd --name=sample ubuntu:latest

# .NetworkSettings.Networks}}を確認するとbridgeになっている
$ docker container inspect sample --format="{{json .NetworkSettings.Networks}}"
{"bridge":{"IPAMConfig":null,"Links":null,"Aliases":null,"NetworkID":"b917ccb08e42a549dd85213c3e705a3ab03295656d760340ab04781ffe8f98da","EndpointID":"9fd096a5ff16be1542c1154baeebce92bc3b5abf6723f9d05ecbc5c36a6ff7c9","Gateway":"172.17.0.1","IPAddress":"172.17.0.2","IPPrefixLen":16,"IPv6Gateway":"","GlobalIPv6Address":"","GlobalIPv6PrefixLen":0,"MacAddress":"02:42:ac:11:00:02","DriverOpts":null}}

3. ネットワークを作成する

ネットワークの作成は以下のコマンドで行います

docker network create [オプション] ネットワーク

オプションは以下が指定可能です。

オプション 説明
--driver, d ネットワークブリッジまたはオーバーレイ(デフォルトはbridge)
--ip-range コンテナに割り当てるIPアドレスのレンジを指定
--subnet サブネットをCIDR形式で指定
--ipv6 IPv6ネットワークを有効にするかどうか(true/false)
-label ネットワークに設定するラベル

今回は--driver=bridgeweb-networkというネットワークを作成してみます。

$ docker network create --driver=bridge web-network
fe7f79487aa87cf03e03c857fc0013d3b85656fad9fb4417f9abfb2402f17c60

# 作成したネットワークを確認
$ docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
b917ccb08e42        bridge              bridge              local
45c4f50ef8dd        host                host                local
e1785a610499        none                null                local
fe7f79487aa8        web-network         bridge              local

$ docker network ls --filter driver=bridge
NETWORK ID          NAME                DRIVER              SCOPE
b917ccb08e42        bridge              bridge              local
fe7f79487aa8        web-network         bridge              local

4. 複数のContainer同士で繋いでみる

ネットワークへの接続

ネットワークへの接続は
docker networkで接続する方法と、
docker run時に接続する方法があります。

docker networkでcontainerをネットワークに接続するには以下のコマンドを使います

docker network connect [オプション] ネットワーク名 コンテナ名

docker runで接続するには以下のコマンドを使います

docker container run オプション --name=コンテナ名 --net=ネットワーク名 コンテナイメージ

今回はdocker runのほうで試します。

1つめのcontainer

バックグラウンドでwebappという名前のcontainerを
ネットワークweb-networkにつないで立ち上げます。

また、ポートはホストOS:8001からcontainerの80につなげます。

$ docker container run -itd -p 8001:80 --name=webapp --net=web-network nginx
8296c047ebf6e8f7d3755dec287903e5d7afee93cf96a47c7ef4b1c3ef04ded7
ブラウザでアクセスしてみる

ブラウザで確認すると当然こんな感じ

f:id:tweeeety:20180625215059p:plain

2つめのcontainer

webfrontという名前のcontainerを
ネットワークweb-networkにつないで立ち上げてbashで起動。

また、container1 -> container2から繋いでみる際は、curlでポート80で繋ぎます。

$ docker container run -it --name=webfront --net=web-network centos /bin/bash

# 1つめのcontainerにcurlしてみる
# nginxの結果が帰ってくる
[root@c1170773ec3c /]# curl webapp:80
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>

<p><em>Thank you for using nginx.</em></p>
</body>
</html>

うまくいきました!

inspectで確認

containerをinspectで確認してみると、
.NetworkSettings.Networksにてweb-networkに繋がっている事が確認できます。

$ docker container inspect webfront webapp
[
    {
        "Id": "e312f6dfd7659b82474dca68f5f991ce3135cd5ab840bb53d998149e79b0dcb2",
        "Created": "2018-06-23T22:36:49.8513111Z",
        "Path": "/bin/bash",
        "Args": [],
        "State": {
            "Status": "running",
            "Running": true,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 8326,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2018-06-23T22:41:17.7127242Z",
            "FinishedAt": "2018-06-23T22:38:05.4488807Z"
        },
        "Image": "sha256:49f7960eb7e4cb46f1a02c1f8174c6fac07ebf1eb6d8deffbcb5c695f1c9edd5",
        "ResolvConfPath": "/var/lib/docker/containers/e312f6dfd7659b82474dca68f5f991ce3135cd5ab840bb53d998149e79b0dcb2/resolv.conf",
        "HostnamePath": "/var/lib/docker/containers/e312f6dfd7659b82474dca68f5f991ce3135cd5ab840bb53d998149e79b0dcb2/hostname",
        "HostsPath": "/var/lib/docker/containers/e312f6dfd7659b82474dca68f5f991ce3135cd5ab840bb53d998149e79b0dcb2/hosts",
        "LogPath": "/var/lib/docker/containers/e312f6dfd7659b82474dca68f5f991ce3135cd5ab840bb53d998149e79b0dcb2/e312f6dfd7659b82474dca68f5f991ce3135cd5ab840bb53d998149e79b0dcb2-json.log",
        "Name": "/webfront",
        "RestartCount": 0,
        "Driver": "overlay2",
        "Platform": "linux",
        "MountLabel": "",
        "ProcessLabel": "",
        "AppArmorProfile": "",
        "ExecIDs": null,
        "HostConfig": {
            "Binds": null,
            "ContainerIDFile": "",
            "LogConfig": {
                "Type": "json-file",
                "Config": {}
            },
            "NetworkMode": "web-network",
            "PortBindings": {},
            "RestartPolicy": {
                "Name": "no",
                "MaximumRetryCount": 0
            },
            "AutoRemove": false,
            "VolumeDriver": "",
            "VolumesFrom": null,
            "CapAdd": null,
            "CapDrop": null,
            "Dns": [],
            "DnsOptions": [],
            "DnsSearch": [],
            "ExtraHosts": null,
            "GroupAdd": null,
            "IpcMode": "shareable",
            "Cgroup": "",
            "Links": null,
            "OomScoreAdj": 0,
            "PidMode": "",
            "Privileged": false,
            "PublishAllPorts": false,
            "ReadonlyRootfs": false,
            "SecurityOpt": null,
            "UTSMode": "",
            "UsernsMode": "",
            "ShmSize": 67108864,
            "Runtime": "runc",
            "ConsoleSize": [
                0,
                0
            ],
            "Isolation": "",
            "CpuShares": 0,
            "Memory": 0,
            "NanoCpus": 0,
            "CgroupParent": "",
            "BlkioWeight": 0,
            "BlkioWeightDevice": [],
            "BlkioDeviceReadBps": null,
            "BlkioDeviceWriteBps": null,
            "BlkioDeviceReadIOps": null,
            "BlkioDeviceWriteIOps": null,
            "CpuPeriod": 0,
            "CpuQuota": 0,
            "CpuRealtimePeriod": 0,
            "CpuRealtimeRuntime": 0,
            "CpusetCpus": "",
            "CpusetMems": "",
            "Devices": [],
            "DeviceCgroupRules": null,
            "DiskQuota": 0,
            "KernelMemory": 0,
            "MemoryReservation": 0,
            "MemorySwap": 0,
            "MemorySwappiness": null,
            "OomKillDisable": false,
            "PidsLimit": 0,
            "Ulimits": null,
            "CpuCount": 0,
            "CpuPercent": 0,
            "IOMaximumIOps": 0,
            "IOMaximumBandwidth": 0
        },
        "GraphDriver": {
            "Data": {
                "LowerDir": "/var/lib/docker/overlay2/df845a28b18ea7627b098493ad76fadf0be29ba2c0ddd6788cf513f878fc0116-init/diff:/var/lib/docker/overlay2/1809e038beecc1e66692da14e5b8028149a73b1566a6f04597889ae8c6d916f4/diff",
                "MergedDir": "/var/lib/docker/overlay2/df845a28b18ea7627b098493ad76fadf0be29ba2c0ddd6788cf513f878fc0116/merged",
                "UpperDir": "/var/lib/docker/overlay2/df845a28b18ea7627b098493ad76fadf0be29ba2c0ddd6788cf513f878fc0116/diff",
                "WorkDir": "/var/lib/docker/overlay2/df845a28b18ea7627b098493ad76fadf0be29ba2c0ddd6788cf513f878fc0116/work"
            },
            "Name": "overlay2"
        },
        "Mounts": [],
        "Config": {
            "Hostname": "e312f6dfd765",
            "Domainname": "",
            "User": "",
            "AttachStdin": true,
            "AttachStdout": true,
            "AttachStderr": true,
            "Tty": true,
            "OpenStdin": true,
            "StdinOnce": true,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
            ],
            "Cmd": [
                "/bin/bash"
            ],
            "Image": "centos@sha256:b67d21dfe609ddacf404589e04631d90a342921e81c40aeaf3391f6717fa5322",
            "Volumes": null,
            "WorkingDir": "",
            "Entrypoint": null,
            "OnBuild": null,
            "Labels": {
                "org.label-schema.schema-version": "= 1.0     org.label-schema.name=CentOS Base Image     org.label-schema.vendor=CentOS     org.label-schema.license=GPLv2     org.label-schema.build-date=20180531"
            }
        },
        "NetworkSettings": {
            "Bridge": "",
            "SandboxID": "372311e1ac5caebcc8f4a45c12a2f19437093f6421254c82bcae38ca1bff94dd",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": {},
            "SandboxKey": "/var/run/docker/netns/372311e1ac5c",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "",
            "Gateway": "",
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,
            "IPAddress": "",
            "IPPrefixLen": 0,
            "IPv6Gateway": "",
            "MacAddress": "",
            "Networks": {
                "web-network": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": [
                        "e312f6dfd765"
                    ],
                    "NetworkID": "fe7f79487aa87cf03e03c857fc0013d3b85656fad9fb4417f9abfb2402f17c60",
                    "EndpointID": "45f3d2f47b8f4aec8dce2cc70f1d0ca003714ff76a9a28dfac5a332c14b65ad0",
                    "Gateway": "172.18.0.1",
                    "IPAddress": "172.18.0.3",
                    "IPPrefixLen": 16,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:ac:12:00:03",
                    "DriverOpts": null
                }
            }
        }
    },
    {
        "Id": "8296c047ebf6e8f7d3755dec287903e5d7afee93cf96a47c7ef4b1c3ef04ded7",
        "Created": "2018-06-23T22:33:09.6325018Z",
        "Path": "nginx",
        "Args": [
            "-g",
            "daemon off;"
        ],
        "State": {
            "Status": "running",
            "Running": true,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 8012,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2018-06-23T22:33:10.1810925Z",
            "FinishedAt": "0001-01-01T00:00:00Z"
        },
        "Image": "sha256:cd5239a0906a6ccf0562354852fae04bc5b52d72a2aff9a871ddb6bd57553569",
        "ResolvConfPath": "/var/lib/docker/containers/8296c047ebf6e8f7d3755dec287903e5d7afee93cf96a47c7ef4b1c3ef04ded7/resolv.conf",
        "HostnamePath": "/var/lib/docker/containers/8296c047ebf6e8f7d3755dec287903e5d7afee93cf96a47c7ef4b1c3ef04ded7/hostname",
        "HostsPath": "/var/lib/docker/containers/8296c047ebf6e8f7d3755dec287903e5d7afee93cf96a47c7ef4b1c3ef04ded7/hosts",
        "LogPath": "/var/lib/docker/containers/8296c047ebf6e8f7d3755dec287903e5d7afee93cf96a47c7ef4b1c3ef04ded7/8296c047ebf6e8f7d3755dec287903e5d7afee93cf96a47c7ef4b1c3ef04ded7-json.log",
        "Name": "/webapp",
        "RestartCount": 0,
        "Driver": "overlay2",
        "Platform": "linux",
        "MountLabel": "",
        "ProcessLabel": "",
        "AppArmorProfile": "",
        "ExecIDs": null,
        "HostConfig": {
            "Binds": null,
            "ContainerIDFile": "",
            "LogConfig": {
                "Type": "json-file",
                "Config": {}
            },
            "NetworkMode": "web-network",
            "PortBindings": {
                "80/tcp": [
                    {
                        "HostIp": "",
                        "HostPort": "8001"
                    }
                ]
            },
            "RestartPolicy": {
                "Name": "no",
                "MaximumRetryCount": 0
            },
            "AutoRemove": false,
            "VolumeDriver": "",
            "VolumesFrom": null,
            "CapAdd": null,
            "CapDrop": null,
            "Dns": [],
            "DnsOptions": [],
            "DnsSearch": [],
            "ExtraHosts": null,
            "GroupAdd": null,
            "IpcMode": "shareable",
            "Cgroup": "",
            "Links": null,
            "OomScoreAdj": 0,
            "PidMode": "",
            "Privileged": false,
            "PublishAllPorts": false,
            "ReadonlyRootfs": false,
            "SecurityOpt": null,
            "UTSMode": "",
            "UsernsMode": "",
            "ShmSize": 67108864,
            "Runtime": "runc",
            "ConsoleSize": [
                0,
                0
            ],
            "Isolation": "",
            "CpuShares": 0,
            "Memory": 0,
            "NanoCpus": 0,
            "CgroupParent": "",
            "BlkioWeight": 0,
            "BlkioWeightDevice": [],
            "BlkioDeviceReadBps": null,
            "BlkioDeviceWriteBps": null,
            "BlkioDeviceReadIOps": null,
            "BlkioDeviceWriteIOps": null,
            "CpuPeriod": 0,
            "CpuQuota": 0,
            "CpuRealtimePeriod": 0,
            "CpuRealtimeRuntime": 0,
            "CpusetCpus": "",
            "CpusetMems": "",
            "Devices": [],
            "DeviceCgroupRules": null,
            "DiskQuota": 0,
            "KernelMemory": 0,
            "MemoryReservation": 0,
            "MemorySwap": 0,
            "MemorySwappiness": null,
            "OomKillDisable": false,
            "PidsLimit": 0,
            "Ulimits": null,
            "CpuCount": 0,
            "CpuPercent": 0,
            "IOMaximumIOps": 0,
            "IOMaximumBandwidth": 0
        },
        "GraphDriver": {
            "Data": {
                "LowerDir": "/var/lib/docker/overlay2/feb0bfb05649a7787b78ce5e6134d30a2a7e7555964026c50bfd3a4af1e2a03e-init/diff:/var/lib/docker/overlay2/2ed039f41684788abb90840539ada301341751824b0112729e02b67b196226d7/diff:/var/lib/docker/overlay2/617a2b41e640cd527fdb39453e022b25eb04b5967ec1f4ed74e4b952fffb4005/diff:/var/lib/docker/overlay2/6bd654f2fa5d21d58a7ffcb989da07153dcaf6755e44952114e067baf7ccdba6/diff",
                "MergedDir": "/var/lib/docker/overlay2/feb0bfb05649a7787b78ce5e6134d30a2a7e7555964026c50bfd3a4af1e2a03e/merged",
                "UpperDir": "/var/lib/docker/overlay2/feb0bfb05649a7787b78ce5e6134d30a2a7e7555964026c50bfd3a4af1e2a03e/diff",
                "WorkDir": "/var/lib/docker/overlay2/feb0bfb05649a7787b78ce5e6134d30a2a7e7555964026c50bfd3a4af1e2a03e/work"
            },
            "Name": "overlay2"
        },
        "Mounts": [],
        "Config": {
            "Hostname": "8296c047ebf6",
            "Domainname": "",
            "User": "",
            "AttachStdin": false,
            "AttachStdout": false,
            "AttachStderr": false,
            "ExposedPorts": {
                "80/tcp": {}
            },
            "Tty": true,
            "OpenStdin": true,
            "StdinOnce": false,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                "NGINX_VERSION=1.15.0-1~stretch",
                "NJS_VERSION=1.15.0.0.2.1-1~stretch"
            ],
            "Cmd": [
                "nginx",
                "-g",
                "daemon off;"
            ],
            "ArgsEscaped": true,
            "Image": "nginx@sha256:3e2ffcf0edca2a4e9b24ca442d227baea7b7f0e33ad654ef1eb806fbd9bedcf0",
            "Volumes": null,
            "WorkingDir": "",
            "Entrypoint": null,
            "OnBuild": null,
            "Labels": {
                "maintainer": "NGINX Docker Maintainers <docker-maint@nginx.com>"
            },
            "StopSignal": "SIGTERM"
        },
        "NetworkSettings": {
            "Bridge": "",
            "SandboxID": "aed26e0cedb3000e6bcdf02f2a45446ae2c81eddbd6f53a30d34992e17f01611",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": {
                "80/tcp": [
                    {
                        "HostIp": "0.0.0.0",
                        "HostPort": "8001"
                    }
                ]
            },
            "SandboxKey": "/var/run/docker/netns/aed26e0cedb3",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "",
            "Gateway": "",
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,
            "IPAddress": "",
            "IPPrefixLen": 0,
            "IPv6Gateway": "",
            "MacAddress": "",
            "Networks": {
                "web-network": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": [
                        "8296c047ebf6"
                    ],
                    "NetworkID": "fe7f79487aa87cf03e03c857fc0013d3b85656fad9fb4417f9abfb2402f17c60",
                    "EndpointID": "cfe083931723d5689088deb5869d3caabe9360b22bbef908fb538041e0c58c7c",
                    "Gateway": "172.18.0.1",
                    "IPAddress": "172.18.0.2",
                    "IPPrefixLen": 16,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:ac:12:00:02",
                    "DriverOpts": null
                }
            }
        }
    }
]

見にくい場合はformatやjqを使ってみると見やすいです

$ docker container inspect webfront webapp --format "{{json .HostConfig}}" | jq .
{
  "Binds": null,
  "ContainerIDFile": "",
  "LogConfig": {
    "Type": "json-file",
    "Config": {}
  },
  "NetworkMode": "web-network",
  "PortBindings": {},
  "RestartPolicy": {
    "Name": "no",
    "MaximumRetryCount": 0
  },
  "AutoRemove": false,
  "VolumeDriver": "",
  "VolumesFrom": null,
  "CapAdd": null,
  "CapDrop": null,
  "Dns": [],
  "DnsOptions": [],
  "DnsSearch": [],
  "ExtraHosts": null,
  "GroupAdd": null,
  "IpcMode": "shareable",
  "Cgroup": "",
  "Links": null,
  "OomScoreAdj": 0,
  "PidMode": "",
  "Privileged": false,
  "PublishAllPorts": false,
  "ReadonlyRootfs": false,
  "SecurityOpt": null,
  "UTSMode": "",
  "UsernsMode": "",
  "ShmSize": 67108864,
  "Runtime": "runc",
  "ConsoleSize": [
    0,
    0
  ],
  "Isolation": "",
  "CpuShares": 0,
  "Memory": 0,
  "NanoCpus": 0,
  "CgroupParent": "",
  "BlkioWeight": 0,
  "BlkioWeightDevice": [],
  "BlkioDeviceReadBps": null,
  "BlkioDeviceWriteBps": null,
  "BlkioDeviceReadIOps": null,
  "BlkioDeviceWriteIOps": null,
  "CpuPeriod": 0,
  "CpuQuota": 0,
  "CpuRealtimePeriod": 0,
  "CpuRealtimeRuntime": 0,
  "CpusetCpus": "",
  "CpusetMems": "",
  "Devices": [],
  "DeviceCgroupRules": null,
  "DiskQuota": 0,
  "KernelMemory": 0,
  "MemoryReservation": 0,
  "MemorySwap": 0,
  "MemorySwappiness": null,
  "OomKillDisable": false,
  "PidsLimit": 0,
  "Ulimits": null,
  "CpuCount": 0,
  "CpuPercent": 0,
  "IOMaximumIOps": 0,
  "IOMaximumBandwidth": 0
}
{
  "Binds": null,
  "ContainerIDFile": "",
  "LogConfig": {
    "Type": "json-file",
    "Config": {}
  },
  "NetworkMode": "web-network",
  "PortBindings": {
    "80/tcp": [
      {
        "HostIp": "",
        "HostPort": "8001"
      }
    ]
  },
  "RestartPolicy": {
    "Name": "no",
    "MaximumRetryCount": 0
  },
  "AutoRemove": false,
  "VolumeDriver": "",
  "VolumesFrom": null,
  "CapAdd": null,
  "CapDrop": null,
  "Dns": [],
  "DnsOptions": [],
  "DnsSearch": [],
  "ExtraHosts": null,
  "GroupAdd": null,
  "IpcMode": "shareable",
  "Cgroup": "",
  "Links": null,
  "OomScoreAdj": 0,
  "PidMode": "",
  "Privileged": false,
  "PublishAllPorts": false,
  "ReadonlyRootfs": false,
  "SecurityOpt": null,
  "UTSMode": "",
  "UsernsMode": "",
  "ShmSize": 67108864,
  "Runtime": "runc",
  "ConsoleSize": [
    0,
    0
  ],
  "Isolation": "",
  "CpuShares": 0,
  "Memory": 0,
  "NanoCpus": 0,
  "CgroupParent": "",
  "BlkioWeight": 0,
  "BlkioWeightDevice": [],
  "BlkioDeviceReadBps": null,
  "BlkioDeviceWriteBps": null,
  "BlkioDeviceReadIOps": null,
  "BlkioDeviceWriteIOps": null,
  "CpuPeriod": 0,
  "CpuQuota": 0,
  "CpuRealtimePeriod": 0,
  "CpuRealtimeRuntime": 0,
  "CpusetCpus": "",
  "CpusetMems": "",
  "Devices": [],
  "DeviceCgroupRules": null,
  "DiskQuota": 0,
  "KernelMemory": 0,
  "MemoryReservation": 0,
  "MemorySwap": 0,
  "MemorySwappiness": null,
  "OomKillDisable": false,
  "PidsLimit": 0,
  "Ulimits": null,
  "CpuCount": 0,
  "CpuPercent": 0,
  "IOMaximumIOps": 0,
  "IOMaximumBandwidth": 0
}

5. ネットワークを削除する

ネットワークを削除するには以下のコマンドです

docker network rm [オプション] ネットワーク名

containerが起動している状態だとエラーが出るのでstopしてから行います

# ネットワークに接続しているcontainerが起動しいるとエラー
$ docker network rm web-network
Error response from daemon: network web-network id fe7f79487aa87cf03e03c857fc0013d3b85656fad9fb4417f9abfb2402f17c60 has active endpoints

# stopする
$ docker container ls -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                  NAMES
e312f6dfd765        centos              "/bin/bash"              34 minutes ago      Up 30 minutes                              webfront
8296c047ebf6        nginx               "nginx -g 'daemon of…"   38 minutes ago      Up 38 minutes       0.0.0.0:8001->80/tcp   webapp

$ docker container stop e312f6dfd765 8296c047ebf6
e312f6dfd765
8296c047ebf6

# stop後だと消せる
$ docker network rm web-network
web-network

おわり

docker便利だけどまだ使いこなせてない\(^o^)/