FROM alpine
MAINTAINER tc 276620500@qq.com
RUN mkdir -p /usr/local/exporter
COPY hbase_exporter /usr/local/exporter
RUN cd /usr/local/exporter &&
chmod +x hbase_exporter
WORKDIR /usr/local/exporter
docker run -e URL="XXXXXX"修改，这个环境变量在容器里也可以$URL获取ENV URL http://127.0.0.1:50070
RUN echo ‘URL=’ $URL # 打印一下默认值
不能用 CMD []这种形式，这种方式读取不到变量CMD ./hbase_exporter -Uri $URL
