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CensOS6のサポートが切れてyum updateでError: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try againが出た時の対処法

Last updated at Posted at 2020-12-04

起こったこと

2020-11-30でCentOS6のサポートが終了した。
Dockerfileでyum updateしてるところがあってエラーになってしまった。
今回はその対処法を残しておく。

Dockerfile
FROM centos:6.6

RUN yum update -y
実行したコマンドとエラー
$ docker build -t centos6.6 .
Sending build context to Docker daemon  2.048kB
Step 1/2 : FROM centos:6.6
 ---> 368c96d786ae
Step 2/2 : RUN yum update -y
 ---> Running in 7daac25d2959
Loaded plugins: fastestmirror
Setting up Update Process
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again
YumRepo Error: All mirror URLs are not using ftp, http[s] or file.
 Eg. Invalid release/repo/arch combination/
removing mirrorlist with no valid mirrors: /var/cache/yum/x86_64/6/base/mirrorlist.txt
The command '/bin/sh -c yum update -y' returned a non-zero code: 1

対処法

Dockerfileを修正

Dockerfile
FROM centos:6.6

RUN sed -i "s|#baseurl=|baseurl=|g" /etc/yum.repos.d/CentOS-Base.repo \
  && sed -i "s|mirrorlist=|#mirrorlist=|g" /etc/yum.repos.d/CentOS-Base.repo \
  && sed -i "s|http://mirror\.centos\.org/centos/\$releasever|https://vault\.centos\.org/6.6|g" /etc/yum.repos.d/CentOS-Base.repo

RUN yum update -y

まとめ

本当はCentOSのバージョンを上げるべきだよ

参考

yumコマンド実行時に Cannot retrieve repository metadata と出て失敗する(CentOS 6.4)

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