首页 > 网站技巧 > 服务器 > 云和虚拟化 > docker > Docker File创建镜像失败ERROR [3/4] RUN yum -y install vim

Docker File创建镜像失败ERROR [3/4] RUN yum -y install vim的解决

2024-11-19 15:21:23 作者：Covirtue

文章描述了在使用DockerFile创建基于CentOS Linux 8的镜像时遇到的问题,即无法下载vim软件包的元数据,问题的原因是CentOS Linux 8的AppStream仓库没有可用的URL,为了解决这个问题,作者建议将CentOS版本修改为7,因为CentOS Linux 7的AppStream仓库通常有可用的URL

问题复现

使用以下内容的Docker File创建镜像：

FROM centos
MAINTAINER xxxxx<xxxxxxxxx@qq.com>

ENV MYPATH /usr/local
WORKDIR $MYPATH

RUN yum -y install vim
RUN yum -y install net-tools

EXPOSE 80

CMD echo $MYPATH
CMD echo "============"
CMD /bin/bash

错误描述：

=> ERROR [3/4] RUN yum -y install vim

------
> [3/4] RUN yum -y install vim:
#0 1.627 CentOS Linux 8 - AppStream 61 B/s | 38 B 00:00
#0 1.664 Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
------
--------------------
5 | WORKDIR $MYPATH
6 |
7 | >>> RUN yum -y install vim
8 | RUN yum -y install net-tools
9 |
--------------------
ERROR: failed to solve: process "/bin/sh -c yum -y install vim" did not complete successfully: exit code: 1

解决问题方法

分析问题

> [3/4] RUN yum -y install vim:
#0 1.627 CentOS Linux 8 - AppStream 61 B/s | 38 B 00:00
#0 1.664 Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist

由上错误描述可知：问题是由于最新版本CentOS Linux 8中vim软件资源下载失败导致。

解决问题

添加版本信息并修改为7即可。

FROM centos:7 # 添加版本
MAINTAINER xxxxx<xxxxxxxxx@qq.com>

ENV MYPATH /usr/local
WORKDIR $MYPATH

# 由于centos7停止服务，这里使用阿里云提供的centos7镜像.2024-08-04
RUN curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
RUN yum makecache

RUN yum -y install vim
RUN yum -y install net-tools

EXPOSE 80

CMD echo $MYPATH
CMD echo "============"
CMD /bin/bash

完成结果

[+] Building 34.8s (8/8) FINISHED                                                          
 => [internal] load build definition from mycentos                                    0.0s
 => => transferring dockerfile: 306B                                                  0.0s
 => [internal] load .dockerignore                                                     0.0s
 => => transferring context: 2B                                                       0.0s
 => [internal] load metadata for docker.io/library/centos:7                           0.3s
 => [1/4] FROM docker.io/library/centos:7@sha256:9d4bcbbb213dfd745b58be38b13b996ebb5  0.0s
 => CACHED [2/4] WORKDIR /usr/local                                                   0.0s
 => [3/4] RUN yum -y install vim                                                     29.1s
 => [4/4] RUN yum -y install net-tools                                                2.8s
 => exporting to image                                                                2.2s 
 => => exporting layers                                                               2.2s 
 => => writing image sha256:9a4f44d6f8c3f8cb6e515e5183feb133ff89e3bc0a8b0597b5aec81f  0.0s 
 => => naming to docker.io/library/chengxcentos:1.0                                   0.0s

注意：docker拉取镜像默认为最新版本。

总结

以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。