Docker breaks network after short period

rimelek · February 22, 2024, 2:35pm

using host networks can’t be a fallback. You can compare your two machines what was installed on one that wasn’t on the other or how the confiuration is different.

I also found this for you

github.com/moby/libnetwork

Docker adds a default dev in routes which breaks host connectivity

opened 09:19PM - 08 Nov 19 UTC

closed 01:28PM - 11 Dec 19 UTC

eoli3n

Docker version 19.03.4-ce, build 9013bf583a Archlinux (up to date) All iptab…les flushed docker package freshly reinstalled default configuration (no daemon.json) When i start a container, after 30 sec, a strange default dev comes and breaks hosts connectivity. Container never have connectivity. ``` root@osz ~# docker run --rm -d -p 8080:80 nginx d086de00d5593253ed1e95bc834572346c2106f81d20e02beea112be488b3a77 root@osz ~# ip route default via 192.168.1.254 dev eno1 proto dhcp src 192.168.1.46 metric 10 172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 192.168.1.0/24 dev eno1 proto kernel scope link src 192.168.1.46 192.168.1.254 dev eno1 proto dhcp scope link src 192.168.1.46 metric 10 root@osz ~# ping 216.58.215.35 PING 216.58.215.35 (216.58.215.35) 56(84) bytes of data. 64 bytes from 216.58.215.35: icmp_seq=1 ttl=53 time=14.4 ms 64 bytes from 216.58.215.35: icmp_seq=2 ttl=53 time=13.8 ms 64 bytes from 216.58.215.35: icmp_seq=3 ttl=53 time=13.6 ms 64 bytes from 216.58.215.35: icmp_seq=4 ttl=53 time=14.2 ms 64 bytes from 216.58.215.35: icmp_seq=5 ttl=53 time=13.8 ms 64 bytes from 216.58.215.35: icmp_seq=6 ttl=53 time=13.9 ms 64 bytes from 216.58.215.35: icmp_seq=7 ttl=53 time=13.9 ms 64 bytes from 216.58.215.35: icmp_seq=8 ttl=53 time=13.6 ms 64 bytes from 216.58.215.35: icmp_seq=9 ttl=53 time=13.8 ms 64 bytes from 216.58.215.35: icmp_seq=10 ttl=53 time=13.3 ms 64 bytes from 216.58.215.35: icmp_seq=11 ttl=53 time=13.8 ms 64 bytes from 216.58.215.35: icmp_seq=12 ttl=53 time=13.9 ms 64 bytes from 216.58.215.35: icmp_seq=13 ttl=53 time=13.7 ms 64 bytes from 216.58.215.35: icmp_seq=14 ttl=53 time=13.7 ms 64 bytes from 216.58.215.35: icmp_seq=15 ttl=53 time=13.7 ms 64 bytes from 216.58.215.35: icmp_seq=16 ttl=53 time=14.2 ms From 169.254.179.145 icmp_seq=17 Destination Host Unreachable From 169.254.179.145 icmp_seq=18 Destination Host Unreachable From 169.254.179.145 icmp_seq=19 Destination Host Unreachable From 169.254.179.145 icmp_seq=20 Destination Host Unreachable From 169.254.179.145 icmp_seq=21 Destination Host Unreachable ^C --- 216.58.215.35 ping statistics --- 23 packets transmitted, 16 received, +5 errors, 30.4348% packet loss, time 22099ms rtt min/avg/max/mdev = 13.303/13.826/14.449/0.260 ms, pipe 4 root@osz ~# ip route default dev veth4a2ef1a scope link default via 192.168.1.254 dev eno1 proto dhcp src 192.168.1.46 metric 10 169.254.0.0/16 dev veth4a2ef1a proto kernel scope link src 169.254.179.145 172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 192.168.1.0/24 dev eno1 proto kernel scope link src 192.168.1.46 192.168.1.254 dev eno1 proto dhcp scope link src 192.168.1.46 metric 10 ``` Killing the container solve the problem and remove default dev.