构建 Docker 映像时无法找到包 [英] Unable to locate package while building Docker image

问题描述

在我的 Docker 容器构建过程中，我尝试使用 apt-get install 安装一些软件包.但是该过程未能完成，因为 4 个包中的 3 个找不到.

During my Docker container build process, I attemptted to install a few packages using apt-get install. However the process failed to complete because the 3 of the 4 packages could not be found.

Step 1 : RUN apt-get update  && apt-get install -y netcat  ca-certificates  build-essential  libssl-dev
 ---> Running in 38d22d97ec4a
Err http://http.debian.net jessie InRelease

Err http://http.debian.net jessie-updates InRelease

Err http://security.debian.org jessie/updates InRelease

Err http://http.debian.net jessie Release.gpg
  Could not resolve 'http.debian.net'
Err http://security.debian.org jessie/updates Release.gpg
  Could not resolve 'security.debian.org'
Err http://http.debian.net jessie-updates Release.gpg
  Could not resolve 'http.debian.net'
Reading package lists...
W: Failed to fetch http://http.debian.net/debian/dists/jessie/InRelease

W: Failed to fetch http://http.debian.net/debian/dists/jessie-updates/InRelease 

W: Failed to fetch http://security.debian.org/dists/jessie/updates/InRelease

W: Failed to fetch http://http.debian.net/debian/dists/jessie/Release.gpg  Could not resolve 'http.debian.net'

W: Failed to fetch http://http.debian.net/debian/dists/jessie-updates/Release.gpg  Could not resolve 'http.debian.net'

W: Failed to fetch http://security.debian.org/dists/jessie/updates/Release.gpg  Could not resolve 'security.debian.org'

W: Some index files failed to download. They have been ignored, or old ones used instead.
Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package netcat
E: Unable to locate package build-essential
E: Unable to locate package libssl-dev
Removing intermediate container 38d22d97ec4a
2015/08/10 12:03:07 The command [/bin/sh -c apt-get update  && apt-get install -y netcat  ca-certificates  build-essential  libssl-dev] returned a non-zero code: 100

起初，我认为这是我的基础映像的问题，但是我在另一个 VM 上构建容器没有问题.想法?

At first, I thought this was an issue with my base image, however I have no issues building the container on another VM. Thoughts?

推荐答案

这个问题围绕着主机的网络配置.eth0 接口配置不正确.以下命令帮助我确定这是 DNS 问题.

This issue revolved around the host's network configuration. The eth0 interface was improperly configured. The following commands helped me determine it was a DNS issue.

$ docker run --rm debian:jessie ping -c 5 google.com
ping: unknown host
$ docker run --rm debian:jessie ping -c 5 8.8.8.8
PING 8.8.8.8 (8.8.8.8): 56 data bytes
64 bytes from 8.8.8.8: icmp_seq=0 ttl=38 time=37.147 ms
64 bytes from 8.8.8.8: icmp_seq=1 ttl=38 time=32.917 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=38 time=31.475 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=38 time=30.692 ms
64 bytes from 8.8.8.8: icmp_seq=4 ttl=38 time=31.180 ms
--- 8.8.8.8 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max/stddev = 30.692/32.682/37.147/2.352 ms

这篇关于构建 Docker 映像时无法找到包的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！