Somtimesdocker集装箱dns失败
有时我的docker容器不能解决的DNS ..
[root@1397f4b5b0b8 ~]# ping google.co.kr ping: unknown host google.co.kr 虽然一周后它没有问题。 突然它导致问题。
一些信息。
1）docker集装箱IP
160: eth0: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 16:a4:72:e5:a0:a4 brd ff:ff:ff:ff:ff:ff inet 172.17.0.4/16 scope global eth0 inet6 fe80::14a4:72ff:fee5:a0a4/64 scope link valid_lft forever preferred_lft forever 162: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever
2）docker容器result.conf
options timeout:1 attempts:1 rotate nameserver 8.8.8.8 nameserver 8.8.4.4 nameserver 192.168.100.60
3）我发送ping到另一个容器
[root@1397f4b5b0b8 ~]# ping 172.17.0.3 PING 172.17.0.3 (172.17.0.3) 56(84) bytes of data. 64 bytes from 172.17.0.3: icmp_seq=1 ttl=64 time=1.01 ms 64 bytes from 172.17.0.3: icmp_seq=2 ttl=64 time=0.060 ms 64 bytes from 172.17.0.3: icmp_seq=3 ttl=64 time=0.033 ms
4）dockerIP地址
docker0 Link encap:Ethernet HWaddr FE:4D:B5:ED:F2:9C inet addr:172.17.42.1 Bcast:172.17.255.255 Mask:255.255.0.0 inet6 addr: fe80::fc99:12ff:fe49:b968/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:10615013037 errors:0 dropped:0 overruns:0 frame:0 TX packets:10581841163 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1452195292535 (1.3 TiB) TX bytes:1436185782855 (1.3 TiB) em1 Link encap:Ethernet HWaddr C8:1F:66:F9:22:1B inet addr:192.168.100.64 Bcast:192.168.100.255 Mask:255.255.255.0 inet6 addr: fe80::ca1f:66ff:fef9:221b/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:18816069331 errors:0 dropped:4421 overruns:0 frame:69216 TX packets:18985345996 errors:0 dropped:6 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2823201130099 (2.5 TiB) TX bytes:2383729440082 (2.1 TiB) Interrupt:35 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:16436 Metric:1 RX packets:14689636131 errors:0 dropped:0 overruns:0 frame:0 TX packets:14689636131 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1541592592181 (1.4 TiB) TX bytes:1541592592181 (1.4 TiB)
5）docker路由表
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.100.0 0.0.0.0 255.255.255.0 U 0 0 0 em1 169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 em1 172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0 0.0.0.0 192.168.100.1 0.0.0.0 UG 0 0 0 em1
我重新启动docker，并启动容器。 然后docker集装箱可以连接到外面。
[root@1397f4b5b0b8 ~]# ping google.co.kr PING google.co.kr (173.194.72.94) 56(84) bytes of data. 64 bytes from tf-in-f94.1e100.net (173.194.72.94): icmp_seq=1 ttl=48 time=69.3 ms 64 bytes from tf-in-f94.1e100.net (173.194.72.94): icmp_seq=2 ttl=48 time=69.4 ms 64 bytes from tf-in-f94.1e100.net (173.194.72.94): icmp_seq=3 ttl=48 time=69.4 ms 64 bytes from tf-in-f94.1e100.net (173.194.72.94): icmp_seq=4 ttl=48 time=69.3 ms
我应该如何解决它？ 如果你真的很感激。
由于某些原因， resolv.conf权限受到限制。 你可以解决它：
sudo chmod 644 /etc/resolv.conf
根据Google公共DNS常见问题中的规定， Google对其公有DNS服务的可用性（即无SLA – 服务等级协议）没有任何承诺。 换句话说，随时可能因为随机的原因而失败，这就是你正在经历的。