dockerfile基于apline将JDK20打包成镜像

​ 今天就来和大家聊聊如何把最新出版的JDK20打包成docker镜像，很多uu都会采用centos作为基础镜像，这么做会有一个问题，centos系统会含有很多库文件，这些库文件JDK程序并不是完全需要的，运行在服务器上会占用很多资源，这就没有必要。我们可以采用apline作为基础镜像打包，apline只包含一些基础命令，是linux系列中最干净的版本啦。

​ 下面就是基于alpine打包JDK20的镜像啦，至于JDK的安装包需要大家去网络上下载啦

FROM alpine:3.15

ARG version=20.0.2.9.1

# Please note that the THIRD-PARTY-LICENSE could be out of date if the base image has been updated recently.
# The Corretto team will update this file but you may see a few days' delay.
RUN wget -O /THIRD-PARTY-LICENSES-20200824.tar.gz https://corretto.aws/downloads/resources/licenses/alpine/THIRD-PARTY-LICENSES-20200824.tar.gz && \
    echo "82f3e50e71b2aee21321b2b33de372feed5befad6ef2196ddec92311bc09becb  /THIRD-PARTY-LICENSES-20200824.tar.gz" | sha256sum -c - && \
    tar x -ovzf THIRD-PARTY-LICENSES-20200824.tar.gz && \
    rm -rf THIRD-PARTY-LICENSES-20200824.tar.gz && \
    wget -O /etc/apk/keys/amazoncorretto.rsa.pub https://apk.corretto.aws/amazoncorretto.rsa.pub && \
    SHA_SUM="6cfdf08be09f32ca298e2d5bd4a359ee2b275765c09b56d514624bf831eafb91" && \
    echo "${SHA_SUM}  /etc/apk/keys/amazoncorretto.rsa.pub" | sha256sum -c - && \
    echo "https://apk.corretto.aws" >> /etc/apk/repositories && \
    apk add --no-cache amazon-corretto-20=$version-r0 && \
    rm -rf /usr/lib/jvm/java-20-amazon-corretto/lib/src.zip


ENV LANG C.UTF-8

ENV JAVA_HOME=/usr/lib/jvm/default-jvm
ENV PATH=$PATH:/usr/lib/jvm/default-jvm/bin