Java最小化镜像制作

下载Oracle官网的JRE包，最终下载的包如下：

jre-8u181-linux-x64.tar.gz

解压JRE包并删除不必要的文件

#解压
tar xf jre-8u181-linux-x64.tar.gz
#进入目录
cd jre1.8.0_181/
#删除文本文件
rm -rf COPYRIGHT LICENSE README release THIRDPARTYLICENSEREADME-JAVAFX.txt THIRDPARTYLICENSEREADME.txt Welcome.html
#删除其他无用文件
rm -rf   lib/plugin.jar 
         lib/ext/jfxrt.jar 
         bin/javaws 
         lib/javaws.jar 
         lib/desktop 
         plugin 
         lib/deploy* 
         lib/*javafx* 
         lib/*jfx* 
         lib/amd64/libdecora_sse.so 
         lib/amd64/libprism_*.so 
         lib/amd64/libfxplugins.so 
         lib/amd64/libglass.so 
         lib/amd64/libgstreamer-lite.so 
         lib/amd64/libjavafx*.so 
         lib/amd64/libjfx*.so

重新打包JRE目录下的所有文件

tar zcvf jre8.tar.gz *

创建Dockerfile

FROM frolvlad/alpine-glibc

MAINTAINER baoyu

RUN  echo 'https://mirrors.ustc.edu.cn/alpine/latest-stable/main/' > /etc/apk/repositories 
&& echo 'https://mirrors.ustc.edu.cn/alpine/latest-stable/community/' >>/etc/apk/repositories 
&& apk update && apk --no-cache add tzdata 
&& ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime  
&& echo "Asia/Shanghai" > /etc/timezone

RUN mkdir /usr/local/dlfc_service
WORKDIR /usr/local/dlfc_service

ADD jre8.tar.gz /usr/java/jdk/

ENV JAVA_HOME /usr/java/jdk
ENV PATH $PATH:$JAVA_HOME/bin

构建镜像

docker build -t reg.mystack.com/k8s/alpine-java:v1 .