| dockerd and docker-compose IPRange conflicts Dockerd and docker-compose by default use the 172.x17.x.x ip space and Yale is also using this range for private ip spaceIP space, which conflicts with important Yale campus resources, including the Yale VPN. If you used using the Docker official repo, it would will have created a docker0 interface with a 172.x17.x.x interface, e. i.e.
sudo Ifconfig docker0
docker0: flags=4099<up,broadcast,multicast> mtu 1500
inet 172.x.x.x netmask g.
$ netstat -nr | grep '172.17'
172.17.0.0 0.0.0.0 255.255.0.0 broadcast U 0 . 0 . 0 .0docker0
This overlaps with campus Yale networks, and causes routing to fail since it tries to route out of the docker0 interface and go’s nowhere. The fix is to just use a 192.x.x.x ip on the docker0 inteface
Do the following.
</up,broadcast,multicast>
sudo su -systemctl stop dockerifdown docker0ifconfig docker0 downif you are certain ITS VPNs. The fix is to change the default network used by the Docker interface and docker-compose. DNO reserved networks: 10.221.31.0/24 10.221.32.0/22
$ sudo su -
$ cat << EOF >> /etc
/sysconfig/network-scripts/ifcfg-docker0
TYPE=Bridge
DEVICE=docker0
NETMASK=255.255.252.0
IPADDR=192.168.5.1
ONBOOT=yes
BOOTPROTO=none
NM_CONTROLLED=no
DELAY=0
EOFifup docker0systemctl start docker/docker/daemon.json
{
"bip": "10.221.31.1/24",
"fixed-cidr": "10.221.31.1/25","default-address-pools": [
{"base":"10.221.32.0/22", "size":24}
] }
EOF
Restart docker: $ sudo systemctl restart docker
Then restart docker-compose:
$ sudo docker-compose down
$ sudo docker-compose up
You may need to reboot your Spinup virtual machine to clear any lingering entries in the system's network routing table in order for the fix to take effect.
The ifconfig output should resemble the following: $ ifconfig
br-353d062c6792: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.221.32.1 netmask 255.255.255.0 broadcast 10.222.0.255
inet6 fe80::42:28ff:fe92:8b0d prefixlen 64 scopeid 0x20<link>
ether 02:42:28:92:8b:0d txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 11 bytes 906 (906.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 10.221.31.1 netmask 255.255.255.0 broadcast 10.221.31.255
ether 02:42:ba:bb:7f:23 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
references:
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