1.关闭docker，删除旧网桥

systemctl stop docker
ip link set dev docker0 down
brctl delbr docker0

如果brctl没找到

[root@test002 ~]# brctl delbr docker0
-bash: brctl: command not found

安装bridge-utils

yum install -y bridge-utils

2.修改配置文件

vim /etc/docker/daemon.json
{
"bip":"172.18.0.1/16"
}

3.启动docker

systemctl start docker

4.查看ip

[root@test002 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:33:3e:aa:d5:35 brd ff:ff:ff:ff:ff:ff
    inet 172.16.128.2/24 brd 172.16.128.255 scope global eth0
       valid_lft forever preferred_lft forever
7: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN 
    link/ether 02:42:c6:f0:58:08 brd ff:ff:ff:ff:ff:ff
    inet 172.18.0.1/16 scope global docker0
       valid_lft forever preferred_lft forever

5.启动一个容器，查看ip

docker start 9c3a8ecf09d1
docker inspect 9c
部分信息如下
            "Gateway": "172.18.0.1",
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,
            "IPAddress": "172.18.0.2",

修改成功