Estou com um problema com meus contêineres do Docker no Ubuntu 14.04 LTS. O Docker funcionou bem por dois dias e, de repente, perdi toda a conectividade de rede dentro dos meus contêineres. A saída de erro abaixo inicialmente me levou a acreditar que era porque o apt-get está tentando resolver o DNS via IPv6.
Desativei o IPv6 na minha máquina host e ainda removi todas as imagens, puxei o Ubuntu base e ainda encontrei o problema.
Mudei meus servidores de nomes /etc/resolve.conf do meu servidor DNS local para os servidores DNS públicos do Google (8.8.8.8 e 8.8.4.4) e ainda não tive sorte. Também configurei o DNS para o Google no DOCKER_OPTS de /etc/default/docker e reiniciei o docker.
Eu também tentei puxar coreos, e o yum também não conseguiu resolver o DNS.
É estranho porque, embora o DNS não funcione, ainda recebo uma resposta quando faço ping nos mesmos servidores de atualização que o apt-get não consegue resolver.
Não estou atrás de um proxy, estou em uma rede local muito padrão, e esta versão do Ubuntu está atualizada e atualizada (instalei há dois dias para estar mais perto do docker).
Pesquisei minuciosamente isso em outras postagens sobre problemas de stackoverflow e github, mas não encontrei nenhuma resolução. Estou sem ideias de como resolver esse problema, alguém pode ajudar?
Mensagem de erro
➜ arthouse git:(docker) ✗ docker build --no-cache .
Sending build context to Docker daemon 51.03 MB
Sending build context to Docker daemon
Step 0 : FROM ubuntu:14.04
---> 5506de2b643b
Step 1 : RUN apt-get update
---> Running in 845ae6abd1e0
Err http://archive.ubuntu.com trusty InRelease
Err http://archive.ubuntu.com trusty-updates InRelease
Err http://archive.ubuntu.com trusty-security InRelease
Err http://archive.ubuntu.com trusty-proposed InRelease
Err http://archive.ubuntu.com trusty Release.gpg
Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1360:8c01::19). - connect (101: Network is unreachable) [IP: 2001:67c:1360:8c01::19 80]
Err http://archive.ubuntu.com trusty-updates Release.gpg
Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1360:8c01::19). - connect (101: Network is unreachable) [IP: 2001:67c:1360:8c01::19 80]
Err http://archive.ubuntu.com trusty-security Release.gpg
Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1360:8c01::19). - connect (101: Network is unreachable) [IP: 2001:67c:1360:8c01::19 80]
Err http://archive.ubuntu.com trusty-proposed Release.gpg
Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1360:8c01::19). - connect (101: Network is unreachable) [IP: 2001:67c:1360:8c01::19 80]
Reading package lists...
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-updates/InRelease
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-security/InRelease
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-proposed/InRelease
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/Release.gpg Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1360:8c01::19). - connect (101: Network is unreachable) [IP: 2001:67c:1360:8c01::19 80]
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-updates/Release.gpg Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1360:8c01::19). - connect (101: Network is unreachable) [IP: 2001:67c:1360:8c01::19 80]
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-security/Release.gpg Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1360:8c01::19). - connect (101: Network is unreachable) [IP: 2001:67c:1360:8c01::19 80]
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-proposed/Release.gpg Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1360:8c01::19). - connect (101: Network is unreachable) [IP: 2001:67c:1360:8c01::19 80]
W: Some index files failed to download. They have been ignored, or old ones used instead.
Contêiner IFCONFIG/PING
➜ code docker run -it ubuntu /bin/bash
root@7bc182bf87bb:/# ifconfig
eth0 Link encap:Ethernet HWaddr 02:42:ac:11:00:04
inet addr:172.17.0.4 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::42:acff:fe11:4/64 Scope:Link
UP BROADCAST RUNNING MTU:1500 Metric:1
RX packets:7 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:738 (738.0 B) TX bytes:648 (648.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
root@7bc182bf87bb:/# ping google.com
PING google.com (74.125.226.0) 56(84) bytes of data.
64 bytes from lga15s42-in-f0.1e100.net (74.125.226.0): icmp_seq=1 ttl=56 time=12.3 ms
--- google.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 12.367/12.367/12.367/0.000 ms
root@7bc182bf87bb:/# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=44 time=21.8 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=44 time=21.7 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=44 time=21.7 ms
Além disso, apt-get update falha quando eu forço o IPv4:
root@6d925cdf84ad:/# sudo apt-get update -o Acquire::ForceIPv4=true
Err http://archive.ubuntu.com trusty InRelease
Err http://archive.ubuntu.com trusty-updates InRelease
Err http://archive.ubuntu.com trusty-security InRelease
Err http://archive.ubuntu.com trusty-proposed InRelease
Err http://archive.ubuntu.com trusty Release.gpg
Unable to connect to archive.ubuntu.com:http: [IP: 91.189.88.153 80]
Err http://archive.ubuntu.com trusty-updates Release.gpg
Unable to connect to archive.ubuntu.com:http: [IP: 91.189.88.153 80]
Err http://archive.ubuntu.com trusty-security Release.gpg
Unable to connect to archive.ubuntu.com:http: [IP: 91.189.88.153 80]
Err http://archive.ubuntu.com trusty-proposed Release.gpg
Unable to connect to archive.ubuntu.com:http: [IP: 91.189.88.153 80]
Reading package lists... Done
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/InRelease