alpine-bash鏡像制作

　　alpine輕量級基於busybox的發行版，特別適合基於docker的base images.

特點：

　　small、simple、secure

官方地址：

https://alpinelinux.org/     //官方發行版本

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

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

在hub.docker.com官方倉庫中默認shell是sh,我還是必須喜歡bash

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

http://dl-cdn.alpinelinux.org/alpine/  ###鏡像庫

###/etc/apk/repositories

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

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

###替換國內TUNA源

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

思路概述:

　　1、安裝bash相關pkg

　　2、修改root賬戶默認shell

　　3、修改登錄shell后的光標欄（PS1）

　　4、覆蓋默認進去shell(sh-->bash)

構建步驟：

Dockerfile

FROM alpine:3.7
MAINTAINER mvpbang [e-mail]
###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

構建鏡像

docker build -t alpine:v1 .

[root@mvp-dd tmp]# docker run --rm -it alpine:v1
root@522065c46217:/ # 
root@522065c46217:/ # 
root@522065c46217:/ # ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
12: eth0@if13: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP 
    link/ether 02:42:ac:11:00:03 brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.3/16 brd 172.17.255.255 scope global eth0
       valid_lft forever preferred_lft forever

注意：由於默認容器啟動執行的 /bin/bash，如果引用此鏡像未在啟動 -it，容器啟動完畢后自動退出(no process stop)