1. centos7-java8基础镜像构建

FROM centos:7
# 作者信息
LABEL maintainer="liushiqi"
# install timezone gcc
ENV ENVIRONMENT DOCKER_PROD
RUN cd / && ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
  && yum makecache \
  && yum install -y wget aclocal automake autoconf make gcc gcc-c++ python-devel mysql-devel bzip2 libffi-devel epel-release \
  && yum clean all
# cd /opt
WORKDIR /opt
# copy jdk8 to /opt, and decompression
ADD jre-8u333-linux-x64.tar.gz /opt
# set jdk8 env
ENV JAVA_HOME=/opt/jre1.8.0_333
ENV CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
ENV PATH=$JAVA_HOME/bin:$PATH
# exec java -version
CMD ["java","-version"]

2. Docker 容器镜像无法正常启动，日志抛出Unable to access jarfile问题的解决方法

java 文件目录错误

3. spring boot 打包后，执行报错“no main manifest attribute, in /app.jar”解决办法

pom.xml 中新增打包插件：

 <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.1.3.RELEASE</version>
            </plugin>
        </plugins>
    </build>