说明：本次生成的镜像是centos7版本的
从官网下载对应的脚本：
https://github.com/moby/moby/blob/master/contrib/mkimage-yum.sh
上面这个脚本就是centos官网用于创建docker镜像的
1、脚本具体的信息如下：
#!/usr/bin/env bash # # Create a base CentOS Docker image. # # This script is useful on systems with yum installed (e.g., building # a CentOS image on CentOS). See contrib/mkimage-rinse.sh for a way # to build CentOS images on other systems. set -e usage() { cat << EOOPTS $(basename $0) [OPTIONS] <name> OPTIONS: -p "<packages>" The list of packages to install in the container. The default is blank. Can use multiple times. -g "<groups>" The groups of packages to install in the container. The default is "Core". Can use multiple times. -y <yumconf> The path to the yum config to install packages from. The default is /etc/yum.conf for Centos/RHEL and /etc/dnf/dnf.conf for Fedora -t <tag> Specify Tag information. default is reffered at /etc/{redhat,system}-release EOOPTS exit 1 } # option defaults yum_config=/etc/yum.conf if [ -f /etc/dnf/dnf.conf ] && command -v dnf &> /dev/null; then yum_config=/etc/dnf/dnf.conf alias yum=dnf fi # for names with spaces, use double quotes (") as install_groups=('Core' '"Compute Node"') install_groups=() install_packages=() version= while getopts ":y:p:g:t:h" opt; do case $opt in y) yum_config=$OPTARG ;; h) usage ;; p) install_packages+=("$OPTARG") ;; g) install_groups+=("$OPTARG") ;; t) version="$OPTARG" ;; ?) echo "Invalid option: -$OPTARG" usage ;; esac done shift $((OPTIND - 1)) name=$1 if [[ -z $name ]]; then usage fi # default to Core group if not specified otherwise if [ ${#install_groups[*]} -eq 0 ]; then install_groups=('Core') fi target=$(mktemp -d --tmpdir $(basename $0).XXXXXX) set -x mkdir -m 755 "$target"/dev mknod -m 600 "$target"/dev/console c 5 1 mknod -m 600 "$target"/dev/initctl p mknod -m 666 "$target"/dev/full c 1 7 mknod -m 666 "$target"/dev/null c 1 3 mknod -m 666 "$target"/dev/ptmx c 5 2 mknod -m 666 "$target"/dev/random c 1 8 mknod -m 666 "$target"/dev/tty c 5 0 mknod -m 666 "$target"/dev/tty0 c 4 0 mknod -m 666 "$target"/dev/urandom c 1 9 mknod -m 666 "$target"/dev/zero c 1 5 # amazon linux yum will fail without vars set if [ -d /etc/yum/vars ]; then mkdir -p -m 755 "$target"/etc/yum cp -a /etc/yum/vars "$target"/etc/yum/ fi if [[ -n "$install_groups" ]]; then yum -c "$yum_config" --installroot="$target" --releasever=/ --setopt=tsflags=nodocs --setopt=group_package_types=mandatory -y groupinstall "${install_groups[@]}" fi if [[ -n "$install_packages" ]]; then yum -c "$yum_config" --installroot="$target" --releasever=/ --setopt=tsflags=nodocs --setopt=group_package_types=mandatory -y install "${install_packages[@]}" fi yum -c "$yum_config" --installroot="$target" -y clean all cat > "$target"/etc/sysconfig/network << EOF NETWORKING=yes HOSTNAME=localhost.localdomain EOF # effectively: febootstrap-minimize --keep-zoneinfo --keep-rpmdb --keep-services "$target". # locales rm -rf "$target"/usr/{{lib,share}/locale,{lib,lib64}/gconv,bin/localedef,sbin/build-locale-archive} # docs and man pages rm -rf "$target"/usr/share/{man,doc,info,gnome/help} # cracklib rm -rf "$target"/usr/share/cracklib # i18n rm -rf "$target"/usr/share/i18n # yum cache rm -rf "$target"/var/cache/yum mkdir -p --mode=0755 "$target"/var/cache/yum # sln rm -rf "$target"/sbin/sln # ldconfig rm -rf "$target"/etc/ld.so.cache "$target"/var/cache/ldconfig mkdir -p --mode=0755 "$target"/var/cache/ldconfig if [ -z "$version" ]; then for file in "$target"/etc/{redhat,system}-release; do if [ -r "$file" ]; then version="$(sed 's/^[^0-9]*([0-9.]+).*$/1/' "$file")" break fi done fi if [ -z "$version" ]; then echo >&2 "warning: cannot autodetect OS version, using '$name' as tag" version=$name fi tar --numeric-owner -c -C "$target" . | docker import - $name:$version docker run -i -t --rm $name:$version /bin/bash -c 'echo success' rm -rf "$target"
该脚本的具体用法如下：
bash 脚本名字 -p "包名" -g "组名" 镜像名字
2、修改官方的脚本
修改以后脚本如下：
#!/usr/bin/env bash # # Create a base CentOS Docker image. # # This script is useful on systems with yum installed (e.g., building # a CentOS image on CentOS). See contrib/mkimage-rinse.sh for a way # to build CentOS images on other systems. set -e usage() { cat << EOOPTS $(basename $0) [OPTIONS] <name> OPTIONS: -p "<packages>" The list of packages to install in the container. The default is blank. Can use multiple times. -g "<groups>" The groups of packages to install in the container. The default is "Core". Can use multiple times. -y <yumconf> The path to the yum config to install packages from. The default is /etc/yum.conf for Centos/RHEL and /etc/dnf/dnf.conf for Fedora -t <tag> Specify Tag information. default is reffered at /etc/{redhat,system}-release EOOPTS exit 1 } # option defaults yum_config=/etc/yum.conf if [ -f /etc/dnf/dnf.conf ] && command -v dnf &> /dev/null; then yum_config=/etc/dnf/dnf.conf alias yum=dnf fi # for names with spaces, use double quotes (") as install_groups=('Core' '"Compute Node"') install_groups=() install_packages=() version= while getopts ":y:p:g:t:h" opt; do case $opt in y) yum_config=$OPTARG ;; h) usage ;; p) install_packages+=("$OPTARG") ;; g) install_groups+=("$OPTARG") ;; t) version="$OPTARG" ;; ?) echo "Invalid option: -$OPTARG" usage ;; esac done shift $((OPTIND - 1)) name=$1 if [[ -z $name ]]; then usage fi # default to Core group if not specified otherwise #if [ ${#install_groups[*]} -eq 0 ]; then # install_groups=('Core') #fi target=$(mktemp -d --tmpdir $(basename $0).XXXXXX) set -x #mkdir -m 755 "$target"/dev #mknod -m 600 "$target"/dev/console c 5 1 #mknod -m 600 "$target"/dev/initctl p #mknod -m 666 "$target"/dev/full c 1 7 #mknod -m 666 "$target"/dev/null c 1 3 #mknod -m 666 "$target"/dev/ptmx c 5 2 #mknod -m 666 "$target"/dev/random c 1 8 #mknod -m 666 "$target"/dev/tty c 5 0 #mknod -m 666 "$target"/dev/tty0 c 4 0 #mknod -m 666 "$target"/dev/urandom c 1 9 #mknod -m 666 "$target"/dev/zero c 1 5 # amazon linux yum will fail without vars set #if [ -d /etc/yum/vars ]; then # mkdir -p -m 755 "$target"/etc/yum # cp -a /etc/yum/vars "$target"/etc/yum/ #fi #if [[ -n "$install_groups" ]]; then # yum -c "$yum_config" --installroot="$target" --releasever=/ --setopt=tsflags=nodocs # --setopt=group_package_types=mandatory -y groupinstall "${install_groups[@]}" #fi if [[ -n "$install_packages" ]]; then yum -c "$yum_config" --installroot="$target" --releasever=/ --setopt=tsflags=nodocs --setopt=group_package_types=mandatory -y install "${install_packages[@]}" fi yum -c "$yum_config" --installroot="$target" -y clean all #cat > "$target"/etc/sysconfig/network << EOF #NETWORKING=yes #HOSTNAME=localhost.localdomain #EOF # effectively: febootstrap-minimize --keep-zoneinfo --keep-rpmdb --keep-services "$target". # locales rm -rf "$target"/usr/{{lib,share}/locale,{lib,lib64}/gconv,bin/localedef,sbin/build-locale-archive} # docs and man pages rm -rf "$target"/usr/share/{man,doc,info,gnome/help} # cracklib rm -rf "$target"/usr/share/cracklib # i18n rm -rf "$target"/usr/share/i18n # yum cache rm -rf "$target"/var/cache/yum #mkdir -p --mode=0755 "$target"/var/cache/yum # sln rm -rf "$target"/sbin/sln # ldconfig rm -rf "$target"/etc/ld.so.cache "$target"/var/cache/ldconfig mkdir -p --mode=0755 "$target"/var/cache/ldconfig if [ -z "$version" ]; then for file in "$target"/etc/{redhat,system}-release; do if [ -r "$file" ]; then version="$(sed 's/^[^0-9]*([0-9.]+).*$/1/' "$file")" break fi done fi if [ -z "$version" ]; then echo >&2 "warning: cannot autodetect OS version, using '$name' as tag" version=$name fi #tar --numeric-owner -c -C "$target" . | docker import - $name:$version tar -cvf centos7_bash_new.tar "$target" #docker run -i -t --rm $name:$version /bin/bash -c 'echo success' rm -rf "$target"
该脚本删除了官方脚本内部默认安装的Core组
脚本执行：
bash 脚本名字 -p "bash" centos7 // centos7这个没有实际的用处了，，这里只是为了脚本不报错，没来的既修改脚本
说明 ：上述的命令会只执行安装bash，然后在当前的目录下生成centos7_bash_new.tar包，
使用刚才生成的包创建docker镜像
# cat create_centos_new.sh |docker import - centos7_bash:7.7.1908
2、1查看生成的镜像
