CentOS 7에서 yum 사용 시 "Could not resolve host: mirrorlist.centos.org; Unknown error"
근래에 CentOS 7 버전을 쓰시는 분은 거의 없을 테지만, ^^ 어쨌든 docker 컨테이너 내에서 사용하려고 구성했더니,
$ cat centos7.dockerfile
FROM centos:7
RUN yum install openssh-server -y
$ docker build -f ./centos7.dockerfile . -t centos7_dotnet_img
yum install 단계에서 실패합니다. 보니까, 독립적으로 실행해도 이런 결과와 함께 종료되는데요,
# yum install openssh-server
Loaded plugins: fastestmirror, ovl
Determining fastest mirrors
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=container error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"
...[생략]...
검색해 보면, CentOS 7의 repo를 변경해야 한다고 합니다.
Linux) CentOS 7 EOS에 따른 yum repo 변경
; https://developer-woong.tistory.com/112
따라서, 위의 글을 참고해 repo 파일을 하나 작성하고,
$ cat centos7.repo
[base]
name=CentOS-$releasever - Base
# original
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
# new
baseurl=http://centos.mirror.cdnetworks.com/7/os/x86_64
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$releasever - Updates
# original
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
# new
baseurl=http://centos.mirror.cdnetworks.com/7/updates/x86_64
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
# original
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
# new
baseurl=http://centos.mirror.cdnetworks.com/7/extras/x86_64
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
# original
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
# new
baseurl=http://centos.mirror.cdnetworks.com/7/centosplus/x86_64
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
이걸 사용하도록 Dockerfile을 수정합니다.
$ cat centos7.dockerfile
FROM centos:7
COPY ./centos7.repo /etc/yum.repos.d/CentOS-Base.repo
RUN yum install openssh-server -y
[이 글에 대해서 여러분들과 의견을 공유하고 싶습니다. 틀리거나 미흡한 부분 또는 의문 사항이 있으시면 언제든 댓글 남겨주십시오.]