3.Docker之jdk最简镜像构建

Docker之jdk1.8最简镜像构建

1.准备JRE

在Java下载网站下载JRE。 Tips:此JRE为Oracle作品，而非Openjdk

2.精简JRE中无关文件

# 进入已经下载jre压缩包的路径,执行解压
tar xzvf ~/Downloads/jre-8u241-linux-x64.tar.gz&&cd jre1.8.0_241
# 删除说明、其他文档
rm -rf COPYRIGHT LICENSE README \
THIRDPARTYLICENSEREADME-JAVAFX.txt \
THIRDPARTYLICENSEREADME.txt \
Welcome.html

# 删除非必要依赖文件
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

# 移除完成后文件大小共111M，然后进行压缩;压缩后大小为44M
tar czvf jre8.tar.gz *

3.编写DockerFile

FROM docker.io/jeanblanchard/alpine-glibc

MAINTAINER cheneyin [e-mail]

ADD jre8.tar.gz /usr/local/java/jdk8/
ENV JAVA_HOME /usr/local/java/jdk8
ENV PATH ${PATH}:${JAVA_HOME}/bin

WORKDIR /opt

Tips:由于Java依赖于glibc，基础镜像选择alpine-glibc并非alpine

4.构建打包

docker build -t touch_star/java8:1.0 .

5.测试运行

docker run -it touch_star/java8:1.0

####    Print   ####
/opt # java -version
java version "1.8.0_241"
Java(TM) SE Runtime Environment (build 1.8.0_241-b07)
Java HotSpot(TM) 64-Bit Server VM (build 25.241-b07, mixed mode)
/opt #