Supported Dockerfile Instructions
Some Dockerfile instructions are directives to the build process and a subset of them are directives to the container engine when a container is run. The latter is an important consideration when it comes to putting a Docker image into production.
For more information on Dockerfile instructions, see the Dockerfile reference here.
This topic provides information about which of the runtime Dockerfile instructions that vSphere Integrated Containers Engine 1.2 supports.
| Option | Dockerfile Reference | Supported |
|---|---|---|
LABEL |
Add metadata to an image | Yes |
EXPOSE |
Expose a port | Not yet supported. Port mappings need to be explicitly declared with docker run -p |
ENV |
Set an environment variable | Yes |
ENTRYPOINT |
Set the executable to be run on start | Yes |
CMD |
Set commands to be run on start | Yes |
USER |
Set the user that runs the main process | Yes |
WORKDIR |
Set the working directory | Yes |
STOPSIGNAL |
Set a stop signal for the container | Not yet supported. A stop signal can be explicitly declared with docker run --stop-signal |
HEALTHCHECK |
Set a health check process | No health check options supported yet. |
SHELL |
Set a default shell | Yes |