Shulou(Shulou.com)06/02 Report--

The docker image is generated using the dockerfile file. Dockerfile is a text file that forms the new basic syntax of the image through command line execution.

FROM builds the container based on that image

Example: centos:7 the first instruction of any Dockerfile must be a FROM instruction

MAINTAINER image maintainer information

Example: unixzhang this information will be written to the Author attribute of the mirror

The Shell command that RUN runs when building the image

Example: RUN ["yum", "install", "nginx"] or RUN yum install nginx

Shell commands executed when CMD runs the container

Example: CMD [". / sbin/php-fpm", "- c", "/ usr/local/php/etc/php-fpm.conf"] or CMD ["/ usr/bin/sshd", "- D"]

EXPOSE declares the port on which the container is running

Example: EXPOSE 8080

ENV sets the environment variables in the container

Example: ENV JAVA_HMOE / usr/local/jdd1.8.0_91

ADD copies a file or directory to the image. If it is a URL or a compressed package, it will be downloaded or decompressed automatically.

ADD html.tar.gz / var/www/html

COPY copies a file or directory to an image. When using a local directory as the source destination, COPY is recommended.

Example: COPY. / start.sh / start.sh

Shell commands executed when ENTRYPOINT runs the container

Example: ENTRYPOINT / bin/bash-c 'start.sh' ENTRYPOINT ["/ bin/sh", "- c", "/ start.sh"]

VOLUME specifies the container mount point to the host automatically generated directory or other container

Example: VOLUME ["/ var/lib/mysql"]

WORKDIR sets working directories for RUN,CMD,ENTRYPOINT,COPY and ADD

Example: WORKDIR / data

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.