|
Dockerfile Cheat Sheet |
| Command | Description |
|---|---|
FROM <image_name> |
Specify the image to use. !! MUST be the first instruction !! |
FROM <image_name>:<tag> |
Specify the image (and version) to use. !! MUST be the first instruction !! |
FROM <image_name>@<digest> |
Specify the image (and version) to use. !! MUST be the first iinstruction !! |
MAINTAINER <author_name> |
Specify an author |
ENV <variable_name>=<value> |
Specify an evnironment variable called variable_name |
RUN <command> [<parameter> ...] |
Inside the container, execute command inside a shell as part of the setup |
RUN ["<executable>", "<parameter>",...] |
Inside the container, execute executable with the parameters as part of the setup. !! Must use double-quotes !! !! Not run inside shell !! |
CMD <command> [<parameter> ...] |
Service/Process that container is designed to provide. |
CMD ["<command>", ["<parameter>",...] |
Service/Process that container is designed to provide. !! Must use double-quotes !! !! Not run inside shell !! |
LABEL <label_key>=<label_value> ... |
Specify a label for the container. |
EXPOSE <port> [<port> ...] |
Specify port(s) that container will listen on. !! Need to use links to connect container ports to host ports |
ADD <src> <dest> |
Copy files from src to dest |
VOLUME <mount_point> ... |
Specify mount points |
USER <user> |
User when executing RUN and CMD |
${variable_name} |
Use a variable inside the Dockerfile |