如何在 Centos 7 上更改 Docker IP 地址？

Question

我在Centos 7上安装了Docker。下面是ifconfig命令的输出

# ifconfig

docker0: flags=4099 mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 0.0.0.0
ether 02:42:ea:cd:a1:19 txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

ens33: flags=4163 mtu 1500
inet 192.168.149.5 netmask 255.255.255.0 broadcast 192.168.149.255
inet6 fe80::c494:6514:b641:e046 prefixlen 64 scopeid 0x20
ether 00:0c:29:57:00:09 txqueuelen 1000 (Ethernet)
RX packets 42800 bytes 26241065 (25.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 31687 bytes 4228571 (4.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73 mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1 (Local Loopback)
RX packets 302 bytes 29477 (28.7 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 302 bytes 29477 (28.7 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

virbr0: flags=4099 mtu 1500
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
ether 52:54:00:ce:2f:27 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

我尝试将docker0的IP地址172.17.0.1修改为192.168.149.5，即ens33的IP地址。我搜索了很多参考站点，但我做不到。如何在CentOS 7上设置docker0的ip地址？

Answer 1

这是我更改 docker 容器 IP 地址的过程。

1. systemctl stop docker 

2. ip link set dev docker0 down 

3. ip addr del 172.17.0.1/16 dev docker0

4. ip addr add 192.168.149.5/24 dev docker0

5. ip link set dev docker0 up

6. iptables -t nat -L -n
   iptables -t nat -F POSTROUTING

7. echo 'DOCKER_OPTS="--bip 192.168.149.5/24"' >> /etc/default/docker

问题是没有这样的文件 (/etc/default/docker)。我生成了 docker 文件，但它不起作用。

Answer 2

首先，docker配置文件的位置取决于docker版本。如果您使用了一些较新的 docker，其配置将在 /etc/docker/daemon.json 中。将以下代码放入配置文件并重启 docker 守护进程，docker 网桥的 IP 将被更新。

{
  "bip": "192.168.1.1/24"
}

希望有所帮助。

Control and configure Docker with systemd

Daemon configuration file

如何在 Centos 7 上更改 Docker IP 地址？

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