DockerFile architecture
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FROM
Base image, a new image is based on the current mirror -
MAINTAINER
Mirror defenders name and e-mail address -
RUN
Command need to run container building -
EXPOSE
External current container port exposed -
WORKDIR
After you create a designated container terminal logged in the default working directory, a foothold -
ENV
Used to set the environment variable to build the mirror process
example: ENV MY_PATH / usr / mytest
environment variables may be used in any subsequent RUN command, just as in the previous command prefix as the environmental variable;
may be other instructions in use these environmental variables, such as: WORKDIR $ mY_PATH -
ADD
The host file in the directory image and copied into the ADD command processing URL and automatically extract the tar archive -
COPY
Similarly ADD, copy files and directories to the mirror.
Building context from the directory <source path> file / directory to <destination path> in the new position of the mirror layer- COPY src dest
- COPY [“src”, “dest”]
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VOLUME
Data volume container, for persistent data storage and work -
CMD
Command a vessel designated to run at startup.
In DockerFIle can have multiple CMD command, but only the last one will work, CMD parameter will be replaced after the docker run. -
ENTRYPOINT
Specifies the command to start a container to run, ENTRYPOINT purpose and CMD, are used to specify the container and start the program parameters. (Will not be replaced, added) -
ONBUILD
Run command when building an inherited DockerFile, the father of the mirror after mirror quilt inherit, the parent is mirrored onbuild departure.
