Docker 安装几个容器后导致本地无法访问，记录解决过程
现象
本地网站无法访问，显示Destination Host Unreachable错误
$ ping xxx.com
PING xxx.com (172.18.0.10) 56(84) bytes of data.
From (172.18.0.1) icmp_seq=1 Destination Host Unreachable
From (172.18.0.1) icmp_seq=2 Destination Host Unreachable
From (172.18.0.1) icmp_seq=3 Destination Host Unreachable
$ route
内核 IP 路由表
目标 网关 子网掩码 标志 跃点 引用 使用 接口
default _gateway 0.0.0.0 UG 100 0 0 enp0s25
link-local 0.0.0.0 255.255.0.0 U 1000 0 0 enp0s25
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
172.18.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-cfc9270b15f3
172.19.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-f5c5f0da48a2
192.168.110.0 0.0.0.0 255.255.254.0 U 100 0 0 enp0s25
$ ifconfig
br-cfc9270b15f3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.18.0.1 netmask 255.255.0.0 broadcast 172.18.255.255
inet6 fe80::42:1aff:fec6:7043 prefixlen 64 scopeid 0x20<link>
ether 02:42:1a:c6:70:43 txqueuelen 0 (以太网)
RX packets 14 bytes 9546 (9.5 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 797 bytes 91465 (91.4 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:13:03:9a:6c txqueuelen 0 (以太网)
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
enp0s25: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.110.55 netmask 255.255.254.0 broadcast 192.168.111.255
inet6 fe80::3615:4135:d778:298 prefixlen 64 scopeid 0x20<link>
ether 54:ee:75:40:ea:67 txqueuelen 1000 (以太网)
RX packets 407891 bytes 60596095 (60.5 MB)
RX errors 0 dropped 15691 overruns 0 frame 0
TX packets 31293 bytes 3769383 (3.7 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 20 memory 0xf1600000-f1620000
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (本地环回)
RX packets 33484889 bytes 2454937345 (2.4 GB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 33484889 bytes 2454937345 (2.4 GB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0问题在于 br-cfc9270b15f3
解决
删除所有容器
$ docker stop $(docker ps -aq)
$ docker rm $(docker ps -aq)删除network
$ docker network prune
$ ifconfig
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:13:03:9a:6c txqueuelen 0 (以太网)
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
enp0s25: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.110.55 netmask 255.255.254.0 broadcast 192.168.111.255
inet6 fe80::3615:4135:d778:298 prefixlen 64 scopeid 0x20<link>
ether 54:ee:75:40:ea:67 txqueuelen 1000 (以太网)
RX packets 419408 bytes 72317482 (72.3 MB)
RX errors 0 dropped 15691 overruns 0 frame 0
TX packets 39576 bytes 4970401 (4.9 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 20 memory 0xf1600000-f1620000
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (本地环回)
RX packets 34240204 bytes 2501217904 (2.5 GB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 34240204 bytes 2501217904 (2.5 GB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0修改 docker 网段
$ sudo service docker stop
$ sudo ifconfig docker0 down
$ sudo vim /etc/docker/daemon.json
$ sudo service docker restart
$ ifconfig
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 175.168.0.1 netmask 255.255.0.0 broadcast 175.168.255.255
ether 02:42:13:03:9a:6c txqueuelen 0 (以太网)
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在 daemon.json 添加 "bip": "175.168.0.1/16"