yumのリポジトリ取得先を国内サーバに固定することにしました。潔くyum-fastestmirrorもオフってます。所詮個人サーバ。シンプルな設定でいいのさ。

操作手順

1. /etc/yum.repos.d/CentOS-Base.repoを編集します。mirrorlist文を全てコメントアウトし、baseurl文を理研さんのサイトに書き換えている感じですね。もちろん他のリポジトリに書き換えてもOKです。下記全文。

   #
   # 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-$releasever - Base
   #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
   #baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
   baseurl=http://ftp.riken.jp/Linux/caos/centos/$releasever/os/$basearch/
   gpgcheck=1
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
   
   #released updates
   [updates]
   name=CentOS-$releasever - Updates
   #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
   #baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
   baseurl=http://ftp.riken.jp/Linux/caos/centos/$releasever/updates/$basearch/
   gpgcheck=1
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
   
   #additional packages that may be useful
   [extras]
   name=CentOS-$releasever - Extras
   #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
   #baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
   baseurl=http://ftp.riken.jp/Linux/caos/centos/$releasever/extras/$basearch/
   gpgcheck=1
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
   
   #additional packages that extend functionality of existing packages
   [centosplus]
   name=CentOS-$releasever - Plus
   #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
   #baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
   baseurl=http://ftp.riken.jp/Linux/caos/centos/$releasever/centosplus/$basearch/
   gpgcheck=1
   enabled=0
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
   
   #contrib - packages by Centos Users
   [contrib]
   name=CentOS-$releasever - Contrib
   #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
   #baseurl=http://mirror.centos.org/centos/$releasever/contrib/$basearch/
   baseurl=http://ftp.riken.jp/Linux/caos/centos/$releasever/contrib/$basearch/
   gpgcheck=1
   enabled=0
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
   

2. /etc/yum/pluginconf.d/fastestmirror.confのenabledを1から0に変更します。手順1のミラーリストをコメントアウトせずに日本近郊のものを列記し、fastestmirrorを有効にさせておくのもいいと思います。めんどくさいからやってないだけ。

   enabled=0
   verbose=0
   always_print_best_host = true
   socket_timeout=3
   #  Relative paths are relative to the cachedir (and so works for users as well
   # as root).
   hostfilepath=timedhosts.txt
   maxhostfileage=10
   maxthreads=15
   #exclude=.gov, facebook
   

3. あとは適当にyum updateなど打って反応を確かみてください。