builder docker构建最小 java 11 镜像

基于alpine构建的精简java 11 docker镜像,由于官方的镜像没有做本地化操作,所以将其本地化

针对技术选型:

alpine linux系统仅5M

使用 eclipse jdk 11 和 alpine linux系统

解决:

1.中文乱码

2.镜像时区问题

一.构建

FROM alpine:3.17
# 作者信息
MAINTAINER lincl 

ENV JAVA_HOME /opt/java/openjdk
ENV PATH $JAVA_HOME/bin:$PATH

# Default to UTF-8 file.encoding
ENV LANG='zh_CN.UTF-8' LANGUAGE='zh_CN:zh' LC_ALL='zh_CN.UTF-8'

#更新Alpine的软件源为阿里云
RUN echo https://mirrors.aliyun.com/alpine/v3.17/main/ > /etc/apk/repositories && \
    echo https://mirrors.aliyun.com/alpine/v3.17/community/ >> /etc/apk/repositories

# fontconfig and ttf-dejavu added to support serverside image generation by Java programs
RUN apk add --no-cache fontconfig libretls musl-locales musl-locales-lang ttf-dejavu tzdata zlib  \
    && rm -rf /var/cache/apk/* \
    && echo "Asia/Shanghai" > /etc/timezone \
    && ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

ENV JAVA_VERSION jdk-11.0.19+7

RUN set -eux; \
    ARCH="$(apk --print-arch)"; \
    case "${ARCH}" in \
       amd64|x86_64) \
         ESUM='b5d71cdf3032040e7d2a577712bf525e32e87686af3430219308a39878b98851'; \
         BINARY_URL='https://github.com/adoptium/temurin11-binaries/releases/download/jdk-11.0.19%2B7/OpenJDK11U-jre_x64_alpine-linux_hotspot_11.0.19_7.tar.gz'; \
         ;; \
       *) \
         echo "不适合架构: ${ARCH}"; \
         exit 1; \
         ;; \
    esac; \
	  wget -O /tmp/openjdk.tar.gz ${BINARY_URL}; \
	  echo "${ESUM} */tmp/openjdk.tar.gz" | sha256sum -c -; \
	  mkdir -p "$JAVA_HOME"; \
	  tar --extract \
	      --file /tmp/openjdk.tar.gz \
	      --directory "$JAVA_HOME" \
	      --strip-components 1 \
	      --no-same-owner \
	  ; \
    rm -f /tmp/openjdk.tar.gz ${JAVA_HOME}/src.zip ${JAVA_HOME}/COPYRIGHT ${JAVA_HOME}/LICENSE ${JAVA_HOME}/README ${JAVA_HOME}/release; \
    rm -rf ${JAVA_HOME}/man /var/cache/*; \
    echo '检查安装...' \
    && fileEncoding="$(echo 'System.out.println(System.getProperty("file.encoding"))' | jshell -s -)"; [ "$fileEncoding" = 'UTF-8' ]; rm -rf ~/.java \
    && echo java -version && java -version \
    && echo '成功'

二.测试

   构建完后大小仅157M左右

 服务正常启动时间与本地一致

字体显示中文

参考 

https://github.com/adoptium/containers/blob/main/8/jre/alpine/Dockerfile.releases.full