无法在docker容器中安装软件包

时间:2016-10-28 10:04:00

标签: ubuntu docker containers dockerfile

以下是我系统中存在的一些泊坞窗图像:

root@labadmin-VirtualBox:/home/labadmin# docker images
REPOSITORY   TAG     IMAGE ID            CREATED               SIZE
ubuntu      14.04   1e0c3dd64ccd        13 days ago         187.9 MB
ubuntu     latest   45bc58500fa3        5 weeks ago         126.9 MB

我想安装" smartmontools"在容器中。但这是一个错误"无法找到包smartmontools"如下:

root@labadmin-VirtualBox:/home/labadmin# docker run -it 1e0c3dd64ccd
root@b4954826a227:/# apt-get install smartmontools
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package smartmontools
root@b4954826a227:/# exit
exit

但是当我在Ubuntu机器上做同样的事情时,它正在工作。

root@labadmin-VirtualBox:/home/labadmin# apt-get install smartmontools
Reading package lists... Done
Building dependency tree       
Reading state information... Done
***smartmontools is already the newest version.***
0 upgraded, 0 newly installed, 0 to remove and 542 not upgraded.
root@labadmin-VirtualBox:/home/labadmin# 

Ubuntu容器和Ubuntu系统有什么区别?是什么阻止了软件包安装在容器中?

我的要求是使用Ubuntu OS作为基本映像创建一些带有一些实用程序的容器:

FROM ubuntu:14.04
RUN apt-get update && apt-get install -y smartmontools

2 个答案:

答案 0 :(得分:0)

通过手动运行容器进行测试时,不要更新Unable to locate package的缓存,因此{{1}}错误

但是你的Dockerfile示例应该可以运行

答案 1 :(得分:0)

以下程序帮助我解决了这个问题:

root@labadmin-VirtualBox:/home/labadmin# docker run busybox nslookup google.com
Server:    8.8.8.8
Address 1: 8.8.8.8

nslookup: can't resolve 'google.com'

当您尝试使用容器ping google.com时,由于DNS问题而无法访问该容器。

root@labadmin-VirtualBox:/home/labadmin# nm-tool  |grep DNS
    DNS:             172.24.100.50
    DNS:             10.1.100.50

找出您机器中使用的DNS服务器:

root@labadmin-VirtualBox:/home/labadmin# docker run --dns 172.24.100.50 busybox nslookup google.com
Server:    172.24.100.50
Address 1: 172.24.100.50 indc01.radisys.com

Name:      google.com
Address 1: 2607:f8b0:4009:80c::200e ord36s01-in-x0e.1e100.net
Address 2: 172.217.4.110 ord36s04-in-f14.1e100.net

通过添加DNS IP执行相同的操作:

root@labadmin-VirtualBox:/home/labadmin# cat /etc/docker/daemon.json
{
    "dns" : ["172.24.100.50", "8.8.8.8"]
}

要解决此问题,请将以下内容永久添加到新文件中:

root@labadmin-VirtualBox:/home/labadmin# sudo service docker restart
docker stop/waiting
docker start/running, process 22291

root@labadmin-VirtualBox:/home/labadmin# docker run busybox nslookup google.com
Server:    172.24.100.50
Address 1: 172.24.100.50 indc01.radisys.com

Name:      google.com
Address 1: 2607:f8b0:4009:801::200e ord30s31-in-x0e.1e100.net
Address 2: 172.217.4.238 ord30s31-in-f14.1e100.net

有关Docker DNS配置的更多信息:https://docs.docker.com/engine/userguide/networking/configure-dns/

重启docker服务:

root@labadmin-VirtualBox:/home/labadmin# docker run -it e02e811dd08f
/ # ping google.com
PING google.com (172.217.4.238): 56 data bytes
64 bytes from 172.217.4.238: seq=0 ttl=47 time=251.506 ms
64 bytes from 172.217.4.238: seq=1 ttl=47 time=245.621 ms
^C
--- google.com ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 245.621/257.113/272.586 ms
/ #

通过运行容器来检查它:

{{1}}

更多信息:https://robinwinslow.uk/2016/06/23/fix-docker-networking-dns/