docker修改默认IP

今天遇到一个问题，我需要在docker镜像上部署一下跑ffmpeg环境的容器，但是呢？又不能让容器的ip地址和宿主机的IP地址一个网段，因为需要连接数据库，而连接数据库又需要设置白名单，这个时候就需要设置一下docker的默认IP了，docker安装参考：https://www.wulaoer.org/?p=260

已经安装好了docker，可以在daemon.json文件中，进行配置。

[root@www.wulaoer.org ~]#  cat /etc/docker/daemon.json 
{
  "registry-mirrors": [           #docker镜像源
    "https://dockerhub.azk8s.cn",
    "https://docker.mirrors.ustc.edu.cn",
    "http://hub-mirror.c.163.com"
  ],
  "max-concurrent-downloads": 10,
  "log-driver": "json-file",
  "log-level": "warn",
  "log-opts": {
    "max-size": "10m",
    "max-file": "3"
    },
  "data-root": "/var/lib/docker",        ＃docker日志路径
 "bip":"10.16.100.1/24"    ＃默认ip段

}

注意，如果添加后要看看bip上面一行是否有一个逗号，如果没有加上。也可以使用mtu=BYTES，覆盖默认的Docker MTU配置。

添加之后重启一下docker服务。然后ifconfig一下，看看docker默认的ip端口已经改成我们设置的ip段了。

[root@www.wulaoer.org ~]# ifconfig 
docker0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.16.100.1  netmask 255.255.255.0  broadcast 10.16.100.255
        inet6 fe80::42:6ff:fe25:d2dc  prefixlen 64  scopeid 0x20<link>
        ether 02:42:06:25:d2:dc  txqueuelen 0  (Ethernet)
        RX packets 35465  bytes 1452750 (1.3 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 67574  bytes 100206284 (95.5 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
..........................................

然后我们看一下容器的ip是否改变成我们设置的ip段。

[root@www.wulaoer.org ~]# docker ps 
CONTAINER ID        IMAGE                COMMAND                  CREATED             STATUS              PORTS                    NAMES
3f436c53f6a7        centos:7.2.1511      "/bin/bash"              About an hour ago   Up 2 seconds                                 ffmpeg
4d39f0c15898        nacos/nacos-server   "bin/docker-startup.Β   2 days ago          Up 2 minutes        0.0.0.0:8848->8848/tcp   nacos
[root@www.wulaoer.org ~]# docker inspect 3f436c53f6a7
[
.........................................................
        "NetworkSettings": {
            "Bridge": "",
            "SandboxID": "2e12856d2f71f39cfb8ca10e80cd19f37146b07f4a6575d4af8547fe4de676f0",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": {},
            "SandboxKey": "/var/run/docker/netns/2e12856d2f71",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "16be1e086ba862f64f04a775f064514980b0ab6ee38d7f4f25979581ccd78a9a",
            "Gateway": "10.16.100.1",
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,
            "IPAddress": "10.16.100.3",  #容器的ip地址
            "IPPrefixLen": 24,
            "IPv6Gateway": "",
            "MacAddress": "02:42:0a:10:64:03",
            "Networks": {
                "bridge": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": null,
                    "NetworkID": "26efa8b50393ba7363fa90687bda7ede61b8fa607f824902bf6eba22662d1b81",
                    "EndpointID": "16be1e086ba862f64f04a775f064514980b0ab6ee38d7f4f25979581ccd78a9a",
                    "Gateway": "10.16.100.1",
                    "IPAddress": "10.16.100.3",
                    "IPPrefixLen": 24,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:0a:10:64:03",
                    "DriverOpts": null
                }
            }
        }
    }
]

docker默认ip段设置成功。暂时没有了，看点其他的吧。