这是一个创建于 2380 天前的主题，其中的信息可能已经有所发展或是发生改变。
这是一个老问题了，但确实没找到原因。
Dockerfile 内容:
FROM ubuntu:xenial RUN apt-get update && apt-get upgrade -y RUN apt-get install -y net-tools CMD ifconfig build 时报错：
Step 1/4 : FROM ubuntu:xenial ---> 13c9f1285025 Step 2/4 : RUN apt-get update && apt-get upgrade -y ---> Running in 7d9b2ce81413 Err:1 http://security.ubuntu.com/ubuntu xenial-security InRelease Temporary failure resolving 'security.ubuntu.com' Err:2 http://archive.ubuntu.com/ubuntu xenial InRelease Temporary failure resolving 'archive.ubuntu.com' Err:3 http://archive.ubuntu.com/ubuntu xenial-updates InRelease Temporary failure resolving 'archive.ubuntu.com' Err:4 http://archive.ubuntu.com/ubuntu xenial-backports InRelease Temporary failure resolving 'archive.ubuntu.com' Reading package lists... W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial/InRelease Temporary failure resolving 'archive.ubuntu.com' W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-updates/InRelease Temporary failure resolving 'archive.ubuntu.com' W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-backports/InRelease Temporary failure resolving 'archive.ubuntu.com' W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/InRelease Temporary failure resolving 'security.ubuntu.com' 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... Calculating upgrade... 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. ---> 2bbbf2281fbf Removing intermediate container 7d9b2ce81413 Step 3/4 : RUN apt-get install -y net-tools ---> Running in ce96aba3aea8 Reading package lists... Building dependency tree... Reading state information... E: Unable to locate package net-tools The command '/bin/sh -c apt-get install -y net-tools' returned a non-zero code: 100 很明显是 apt-get 无法 update
已经尝试的解决方式：
1、更改为国内源(阿里源与 163 源，也测试过 sed 直接修改)，无效：
RUN mv /etc/apt/sources.list /etc/apt/sources.list.bak && \ echo 'deb http://mirrors.163.com/debian/ jessie main non-free contrib' > /etc/apt/sources.list && \ echo 'deb http://mirrors.163.com/debian/ jessie-updates main non-free contrib' >> /etc/apt/sources.list && \ echo 'deb http://mirrors.163.com/debian-security/ jessie/updates main non-free contrib' >> /etc/apt/sources.list 报错原因同之前：
Err:1 http://mirrors.163.com/debian jessie InRelease Temporary failure resolving 'mirrors.163.com' 2、尝试更改 DNS （ 1 ）我需要在 docker build 时指定 DNS，不是 run 的时候 （ 2 ） DNS 中已经有 114.114.114.114
PS：宿主机可以执行 apt-update
 | 1 XSG 2019-07-01 16:34:23 +08:00 你的源错了 看下你 FROM 的镜像是 xenial，但是修改的 apt 源是 jessie，不匹配！ |
 | 2 pacoxu 2019-07-02 13:21:30 +08:00 https://github.com/pacoxu/dao-tomcat/tree/master/samples 写了个简单的例子，找了个 ubuntu 的 aliyun 源 docker build . Sending build context to Docker daemon 3.584kB Step 1/3 : FROM ubuntu:xenial xenial: Pulling from library/ubuntu Digest: sha256:a4d8e674ee993e5ec88823391de828a5e9286a1597b731eaecaaf9066cfdf539 Status: Downloaded newer image for ubuntu:xenial ---> 13c9f1285025 Step 2/3 : COPY sources.list /etc/apt/sources.list ---> 93899785ec2a Step 3/3 : RUN apt-get update && apt-get upgrade -y && rm -rf /var/lib/apt/lists/* ---> Running in 2369ec47a573 Get:1 http://mirrors.aliyun.com/ubuntu xenial InRelease [247 kB] Get:2 http://mirrors.aliyun.com/ubuntu xenial-security InRelease [109 kB] Get:3 http://mirrors.aliyun.com/ubuntu xenial-updates InRelease [109 kB] |
 | 3 LieNoWell OP  2 最后解决的方法是 docker build 指定 --network=host 问题中已经说明：宿主机中可以 update，容器中不可以，应该是 docker 配置问题 PS： 更改源版本不对是复制的代码，实际上是正确的版本 |
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