字符集优化：删除中英文之外的其它语言

#先检查是否有安装中文语言 # locale -a
localedef --list-archive |egrep -v ^"en_US|zh" |xargs localedef --delete-from-archive
mv -f /usr/lib/locale/locale-archive /usr/lib/locale/locale-archive.tmpl
build-locale-archive

镜像构建所需yum源文件 >>CentOS7-Base-163.repo

# CentOS-Base.repo
[base]
name=CentOS-$releasever - Base - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
baseurl=http://mirrors.163.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

#released updates
[updates]
name=CentOS-$releasever - Updates - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
baseurl=http://mirrors.163.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
baseurl=http://mirrors.163.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - 163.com
baseurl=http://mirrors.163.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

Dockerfile

FROM centos:7

MAINTAINER Gabriel Wu

# Set correct environment variables.
ENV HOME /root

RUN mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
COPY CentOS7-Base-163.repo /etc/yum.repos.d
#RUN yum clean all && \
#    yum makecache

#RUN yum update -y && \
#    yum install -y epel-release && \
#    yum install -y unzip tar curl wget less net-tools telnet openssh-clients p7zip p7zip-plugins && \
#    yum install -y kde-l10n-Chinese && \
#    yum clean all
RUN yum update -y && \
    yum install -y epel-release && \
    yum install -y unzip tar curl wget openssh-clients p7zip p7zip-plugins && \
    yum clean all

COPY locale-archive /usr/lib/locale
ENV LANG=zh_CN.UTF-8
RUN echo "LANG=\"zh_CN.UTF-8\"" >/etc/locale.conf
#update system timezone
RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
#update application timezone
RUN echo "Asia/Shanghai" >> /etc/timezone