Sample Custom Environment

This is a sample project that can be supplied to HackerRank as custom environment that can be brought up for candidates taking the test.

The project is to be structured as a typical Dockerized project repository with the only mandatory file being the Dockerfile itself. There are a few caveats which need to be kept in mind though and they are as described below.

Dockerfile Specifications

• The FROM instruction has to mandatorily be set to ubuntu:16.04. This will later be replaced by gcr.io/che-fullstack/rba-base:latest when the image is built. The contents of this image is listed in the next section.
• In the base image the USER is set to user. Hence sudo will need to be appended to RUN instructions to perform privileged actions. For testing, the instructions in the sample Dockerfile can be used to add user which can then followed by the custom instructions.
• Additional users can also be added if necessary but ensure the default user is set to user if overridden by previous instructions.
• Additional files can be placed in the project root to COPY or ADD to the image through the Dockerfile.
• DO NOT override the ENTRYPOINT or CMD instructions. Commands to be executed can be done so using the Run, Install or Test commands that are allowed to be configured during Question creation in HackerRank.
• The WORKDIR is set to /projects. Ensure it is reset to the same value if overridden by previous instructions.

Base Image

The image gcr.io/che-fullstack/rba-base:latest consists of

• Ubuntu:16.04
• Essential system packages (sudo, bash, wget, unzip, curl, software-properties-common, zip, rar, unrar, vim , git, iputils-ping, net-tools etc.)
• Node v8.15.1 LTS and npm v6.4.1
• Java-1.8.0-openjdk-amd64

While preparing the Dockerfile, ensure there are no conflicts arising because of the above.

Limits

• Maximum Image Size: 1GB