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
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/