alpine-bash镜像制作

　　alpine轻量级基于busybox的发行版，特别适合基于docker的base images.

特点：

　　small、simple、secure

官方地址：

https://alpinelinux.org/     //官方发行版本

https://pkgs.alpinelinux.org/packages?name=&branch=edge     //apk package

http://dl-cdn.alpinelinux.org/

在hub.docker.com官方仓库中默认shell是sh,我还是必须喜欢bash

https://hub.docker.com/_/alpine

http://dl-cdn.alpinelinux.org/alpine/  ###镜像库

###/etc/apk/repositories

http://dl-cdn.alpinelinux.org/alpine/v3.11/main

http://dl-cdn.alpinelinux.org/alpine/v3.11/community

###替换国内TUNA源

sed -i 's/dl-cdn.alpinelinux.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apk/repositories

思路概述:

　　1、安装bash相关pkg

　　2、修改root账户默认shell

　　3、修改登录shell后的光标栏（PS1）

　　4、覆盖默认进去shell(sh-->bash)

构建步骤：

Dockerfile

FROM alpine:3.7
MAINTAINER mvpbang mvpbang@qq.com
###alpine+bash

ADD .bashrc /root/
RUN set -x \
    apk update \
    && apk add --no-cache bash bash-doc bash-completion \
    && sed -i 's/ash/bash/g' /etc/passwd \
    && source /root/.bashrc
CMD ["/bin/bash"]

.bashrc

export HISTTIMEFORMAT="%d/%m/%y %T "
export PS1='\u@\h:\W \$ '
alias ll='ls -alF'
alias ls='ls --color=auto'
source /etc/profile.d/bash_completion.sh

构建镜像

docker build -t alpine:v1 .

[root@mvp-dd tmp]# docker run --rm -it alpine:v1
root@522065c46217:/ #
root@522065c46217:/ #
root@522065c46217:/ # ip a
: lo: <LOOPBACK,UP,LOWER_UP> mtu  qdisc noqueue state UNKNOWN qlen
    link/loopback ::::: brd :::::
    inet 127.0.0.1/ scope host lo
       valid_lft forever preferred_lft forever
: eth0@if13: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu  qdisc noqueue state UP
    link/ether ::ac::: brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.3/ brd 172.17.255.255 scope global eth0
       valid_lft forever preferred_lft forever

注意：由于默认容器启动执行的 /bin/bash，如果引用此镜像未在启动 -it，容器启动完毕后自动退出(no process stop)