kubernetes实战-交付dubbo服务到k8s集群（三）安装配置maven和java运行时环境的底包镜像

maven 官方地址： 官方地址

下载maven，shdd7-200

# cd /opt/src

# wget https://archive.apache.org/dist/maven/maven-3/3.6.1/binaries/apache-maven-3.6.1-bin.tar.gz

# mkdir /data/nfs-volume/jenkins_home/maven-3.6.1-8u232

# tar -zxf apache-maven-3.6.1-bin.tar.gz -C /data/nfs-volume/jenkins_home/maven-3.6.1-8u232/

# cd /data/nfs-volume/jenkins_home/maven-3.6.1-8u232

# mv apache-maven-3.6.1/* ./

# rm -rf apache-maven-3.6.1/

初始化maven配置：

# vi /data/nfs-volume/jenkins_home/maven-3.6.1-8u232/conf/settings.xml 

<mirror>
  <id>nexus-aliyun</id>
  <mirrorOf>*</mirrorOf>
  <name>Nexus aliyun</name>
  <url>http://maven.aliyun.com/nexus/content/groups/public</url>
</mirror>

制作dubbo微服务底包镜像：JAVA运行时环境的底包

# docker push stanleyws/jre8:8u112

# docker tag fa3a085d6ef1 harbor.od.com/public/jre:8u112

# docker push harbor.od.com/public/jre:8u112

创建Dockerfile：

# cd /data/dockerfile/
# mkdir jre8
# cd jre8
# vi Dockerfile

FROM harbor.od.com/public/jre:8u112
RUN /bin/cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime &&\
    echo 'Asia/Shanghai' >/etc/timezone
ADD config.yml /opt/prom/config.yml
ADD jmx_javaagent-0.3.1.jar /opt/prom/
WORKDIR /opt/project_dir
ADD entrypoint.sh /entrypoint.sh
CMD ["/entrypoint.sh"]

创建Dockerfile所需文件：

# vi config.yml

--- 
rules: 
 - pattern: '.*'

下载jmx_javaagent,监控jvm信息：

# wget https://repo1.maven.org/maven2/io/prometheus/jmx/jmx_prometheus_javaagent/0.3.1/jmx_prometheus_javaagent-0.3.1.jar -O jmx_javaagent-0.3.1.jar

创建entrypoint.sh：使用exec 来运行java的jar包，能够使脚本将自己的pid 为‘1’ 传递给java进程，避免docker容器因没有前台进程而退出。并且不要加&符。

# vi entrypoint.sh

#!/bin/sh
M_OPTS="-Duser.timezone=Asia/Shanghai -javaagent:/opt/prom/jmx_javaagent-0.3.1.jar=$(hostname -i):${M_PORT:-"12346"}:/opt/prom/config.yml"
C_OPTS=${C_OPTS}
JAR_BALL=${JAR_BALL}
exec java -jar ${M_OPTS} ${C_OPTS} ${JAR_BALL}

执行权限：

# chmod u+x entrypoint.sh

执行docker build：base仓库自行创建，权限公开

# docker build . -t harbor.od.com/base/jre8:8u112