一、yumに入るrepo.d

[root@node-01 ~]# cd /etc/yum.repos.d/

[root@node-01 yum.repos.d]# ls
CentOS-Base.repo  CentOS-Sources.repo

二、バックアップ元yumソース

[root@node-01 yum.repos.d]# mkdir yum-back

[root@node-01 yum.repos.d]# mv CentOS-* yum-back/

[root@node-01 yum.repos.d]# ls
yum-back

三、yumソースをアリソースに置き換える

[root@node-01 yum.repos.d]# cat CentOS-Base.repo 
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the 
# remarked out baseurl= line instead.
#
#

[base]
name=CentOS-$releasever - Base
baseurl=https://mirrors.aliyun.com/centos-altarch/$releasever/os/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#released updates 
[updates]
name=CentOS-$releasever - Updates
baseurl=https://mirrors.aliyun.com/centos-altarch/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.aliyun.com/centos-altarch/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
enabled=1

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=https://mirrors.aliyun.com/centos-altarch/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

[root@node-01 yum.repos.d]# cat epel.repo 
[epel]
name=Extra Packages for Enterprise Linux 7 - $basearch
#baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch
baseurl=https://mirrors.tuna.tsinghua.edu.cn/epel/7/$basearch
#metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch
failovermethod=priority
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

[epel-debuginfo]
name=Extra Packages for Enterprise Linux 7 - $basearch - Debug
#baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch/debug
baseurl=https://mirrors.tuna.tsinghua.edu.cn/epel/7/$basearch/debug
#metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-debug-7&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1

[epel-source]
name=Extra Packages for Enterprise Linux 7 - $basearch - Source
#baseurl=http://download.fedoraproject.org/pub/epel/7/SRPMS
baseurl=https://mirrors.tuna.tsinghua.edu.cn/epel/7/SRPMS
#metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-source-7&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1

四、認証鍵の置換

[root@node-01 yum.repos.d]# cd /etc/pki/rpm-gpg/

[root@node-01 rpm-gpg]# ls
RPM-GPG-KEY-CentOS-7  RPM-GPG-KEY-CentOS-7-aarch64

[root@node-01 rpm-gpg]# cat RPM-GPG-KEY-CentOS-7
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.5 (GNU/Linux)
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=OGYX
-----END PGP PUBLIC KEY BLOCK-----

[root@node-01 rpm-gpg]# cat RPM-GPG-KEY-CentOS-7-aarch64 
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v2.0.22 (GNU/Linux)
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=qiwp
-----END PGP PUBLIC KEY BLOCK-----

五、yum生成キャッシュの実行

[root@node-01 ~]#  yum makecache

[root@node-01 ~]# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7-aarch64

[root@node-01 ~]# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

六、検証

[root@node-01 ~]# yum -y install gcc-c++

Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package gcc-c++.aarch64 0:4.8.5-36.el7 will be installed
--> Processing Dependency: libstdc++-devel = 4.8.5-36.el7 for package: gcc-c++-4.8.5-36.el7.aarch64
--> Processing Dependency: libstdc++ = 4.8.5-36.el7 for package: gcc-c++-4.8.5-36.el7.aarch64
--> Processing Dependency: gcc = 4.8.5-36.el7 for package: gcc-c++-4.8.5-36.el7.aarch64
......
......
......
Installed:
  gcc-c++.aarch64 0:4.8.5-36.el7                                                                                                       

Dependency Installed:
  cpp.aarch64 0:4.8.5-36.el7    gcc.aarch64 0:4.8.5-36.el7    libmpc.aarch64 0:1.0.1-3.el7    libstdc++-devel.aarch64 0:4.8.5-36.el7   

Dependency Updated:
  libgcc.aarch64 0:4.8.5-36.el7              libgomp.aarch64 0:4.8.5-36.el7              libstdc++.aarch64 0:4.8.5-36.el7             

Complete!