Docker命令不再响应

Question

大多数docker命令永远不会结束.我必须用CTRL + C手动中断它们.即使是简单的命令docker ps,docker info也可能不响应.

然而,docker help和docker version仍然工作.

我认为存在类似于特定容器的死锁,因此与容器相关的命令将无法完成.

如何处理这种情况？

---

我的码头版本是1.12.3.我不使用Swarm模式.该docker logs命令也不起作用.使用dmesg我可以看到很多I/O错误,但我不知道它是否与我的问题有关:

[12898.121287] loop: Write error at byte offset 8882749440, length 4096.
[12898.122837] loop: Write error at byte offset 8883666944, length 4096.
[12898.124685] loop: Write error at byte offset 8882814976, length 4096.
[12898.126459] loop: Write error at byte offset 8883404800, length 4096.
[12898.128201] loop: Write error at byte offset 8883470336, length 4096.
[12898.129921] loop: Write error at byte offset 8883535872, length 4096.
[12898.131774] loop: Write error at byte offset 8883601408, length 4096.
[12898.133594] loop: Write error at byte offset 8883732480, length 4096.
[12917.269786] loop: Write error at byte offset 8883798016, length 4096.
[12917.270331] quiet_error: 632 callbacks suppressed
[12917.270334] Buffer I/O error on device dm-6, logical block 1313320
[12917.270540] lost page write due to I/O error on dm-6
[12917.270543] Buffer I/O error on device dm-6, logical block 1313321
[12917.270740] lost page write due to I/O error on dm-6
[12917.270742] Buffer I/O error on device dm-6, logical block 1313322
[12917.270957] lost page write due to I/O error on dm-6
[12917.270959] Buffer I/O error on device dm-6, logical block 1313323
[12917.271177] lost page write due to I/O error on dm-6
[12917.271179] Buffer I/O error on device dm-6, logical block 1313324
[12917.271377] lost page write due to I/O error on dm-6
[12917.271379] Buffer I/O error on device dm-6, logical block 1313325
[12917.271573] lost page write due to I/O error on dm-6
[12917.301759] loop: Write error at byte offset 8883863552, length 4096.
[12917.312038] loop: Write error at byte offset 8883929088, length 4096.
[12917.312396] Buffer I/O error on device dm-6, logical block 1313328
[12917.312635] lost page write due to I/O error on dm-6
[12917.312638] Buffer I/O error on device dm-6, logical block 1313329
[12917.312867] lost page write due to I/O error on dm-6
[12917.312869] Buffer I/O error on device dm-6, logical block 1313330
[12917.313121] lost page write due to I/O error on dm-6
[12917.313123] Buffer I/O error on device dm-6, logical block 1313331
[12917.313346] lost page write due to I/O error on dm-6
[13090.853726] INFO: task kworker/u8:0:17212 blocked for more than 120 seconds.
[13090.854055] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

使用该命令sudo systemctl status -l docker,将打印以下消息,但我无法判断它们是否相关:

dockerd[1344]: time="2016-11-24T17:49:01.184874648+01:00" level=warning msg="libcontainerd: container c9f35af1836bf856001ca6156663f713c1217a697e8d2451927c67797fb5a770 restart canceled"
dockerd[1344]: time="2016-11-24T17:49:02.627116016+01:00" level=info msg="No non-localhost DNS nameservers are left in resolv.conf. Using default external servers : [nameserver 8.8.8.8 nameserver 8.8.4.4]"
dockerd[1344]: time="2016-11-24T17:49:02.627152661+01:00" level=info msg="IPv6 enabled; Adding default IPv6 external servers : [nameserver 2001:4860:4860::8888 nameserver 2001:4860:4860::8844]"
dockerd[1344]: time="2016-11-24T18:19:51.472701647+01:00" level=warning msg="libcontainerd: container c9f35af1836bf856001ca6156663f713c1217a697e8d2451927c67797fb5a770 restart canceled"
dockerd[1344]: time="2016-11-24T18:19:56.712126199+01:00" level=info msg="No non-localhost DNS nameservers are left in resolv.conf. Using default external servers : [nameserver 8.8.8.8 nameserver 8.8.4.4]"
dockerd[1344]: time="2016-11-24T18:19:56.712159759+01:00" level=info msg="IPv6 enabled; Adding default IPv6 external servers : [nameserver 2001:4860:4860::8888 nameserver 2001:4860:4860::8844]"
dockerd[1344]: time="2016-11-24T18:34:24.301786606+01:00" level=info msg="No non-localhost DNS nameservers are left in resolv.conf. Using default external servers : [nameserver 8.8.8.8 nameserver 8.8.4.4]"
dockerd[1344]: time="2016-11-24T18:34:24.302208751+01:00" level=info msg="IPv6 enabled; Adding default IPv6 external servers : [nameserver 2001:4860:4860::8888 nameserver 2001:4860:4860::8844]"

Answer 1

删除容器后,Docker命令挂起错误.

守护进程dockerd处于异常状态:sudo service docker start在被停止(service docker stop)之后无法启动().

# sudo service docker start
Redirecting to /bin/systemctl start docker.service
Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.

# journalctl -xe
kernel: device-mapper: ioctl: unable to remove open device docker-253:0-19468577-d6f74dd67f106d6bfa483df4ee534dd9545dc8ca
...
systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE
systemd[1]: Failed to start Docker Application Container Engine.
systemd[1]: Unit docker.service entered failed state.
systemd[1]: docker.service failed.
polkitd[896]: Unregistered Authentication Agent for unix-process:22551:34177094 (system bus name :1.290, object path /org
ESCESC
kernel: dev_remove: 41 callbacks suppressed
kernel: device-mapper: ioctl: unable to remove open device docker-253:0-19468577-fc63401af903e22d05a4518e02504527f0d7883f9d997d7d97fdfe72ba789863
...
dockerd[22566]: time="2016-11-28T10:18:09.840268573+01:00" level=fatal msg="Error starting daemon: timeout"
systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE
systemd[1]: Failed to start Docker Application Container Engine.

此外,可以使用ps -eax | grep docker(在"STAT"列中存在"Z")来观察许多僵尸Docker进程,例如docker-proxies.

后重新启动服务器并重新启动泊坞窗,僵尸进程消失,泊坞窗命令再次合作.

Answer 2

我也有类似的问题。重新启动服务器对我不起作用。我遇到了这个问题，因为我刚刚安装了一个有某种错误的新容器。之后，大部分 Docker 命令都没有响应。我通过执行以下命令修复了它：

docker system prune -a

这将删除所有未使用的容器。就我而言，我刚刚添加的容器也是如此。更多信息：

https://docs.docker.com/engine/reference/commandline/system_prune/