Dcokerfile memo

Instructions that can be used in the Dockerfile It is not case sensitive. It is customary to use uppercase letters.

• FROM
  Be sure to start from now on. Only ARG can be placed before FROM. ARG is a FROM argument declaration.

FROM <image> [AS <name>]
FROM <image>[:<tag>] [AS <name>]
FROM <image>[@<digest>] [AS <name>]

• ESCAPE　 Specifying escape characters. By default, "" is set.

• ENV Environment variable replacement. It is supported by the following instructions.
  

  • ADD
  • COPY
  • ENV
  • EXPOSE
  • LABEL
  • USER
  • WORKDIR
  • VOLUME
  • STOPSIGNAL

• RUN

RUN <command>Shell format
RUN ["executable", "param1", "param2"]exec format

• CMD
  

CMD ["executable","param1","param2"](exec format, this format is recommended)
CMD ["param1","param2"](As the default parameter for ENTRYPOINT)
CMD command param1 param2 (Shell format)

• LABEL
  

LABEL <key>=<value> <key>=<value> <key>=<value> ...

• EXPOSE
  Specify which port to listen on when the container runs

EXPOSE <port> [<port>...]

• ENV
  Setting environment variables

ENV <key> <value>Set one value for one variable
ENV <key>=<value> ...Set the values of multiple variables at once

• ADD
  Copy the file, directory, and remote file URLs shown in <src> to .

ADD <src>... <dest>
ADD ["<src>",... "<dest>"] <dest>Is specified by an absolute path or a relative path from WORKDIR

• COPY

COPY <src>... <dest>
COPY ["<src>",... "<dest>"]Specified by absolute path or relative path from WORKDIR

• ENTRYPOINT
  Even if there are multiple descriptions, only the last instruction is executed

ENTRYPOINT ["executable", "param1", "param2"](Execformat,recommended)
ENTRYPOINT command param1 param2 (shell format)

• VOLUME

VOLUME ["/data"]
VOLUME /data

• USER

USER <user>[:<group>]
USER <UID>[:<GID>]

• WORKDIR
  Specifying the work directory. Generated if WORKDIR does not exist. It can be used in the subsequent RUN, CMD, ENTRYPOINT, COPY, and ADD instructions.

WORKDIR /a
WORKDIR b
WORKDIR c
RUN pwd ⇒ This result is "/a/b/c」

• ARG
  Define a variable and pass its value at build time.

ARG <name>[=<default value>]

The following ARG variables are already defined.

• HTTP_PROXY

• http_proxy

• HTTPS_PROXY

• https_proxy

• FTP_PROXY

• ftp_proxy

• NO_PROXY

• no_proxy

• ONBUILD Tori adds instructions to the image. Executed when the image is used as a base image in other builds.

• STOPSIGNAL

STOPSIGNAL signal

• HEALTHCHECK Specify the command to perform health check in the container

--SHELL Default shell overwrite setting

SHELL ["executable", "parameters"]

The default shell is On Linux ["/ bin / sh "," -c "] On Windows ["cmd "," / S "," / C "]