Arbitrary code execution server using Docker.
Each language has its own Docker image and so each evaluation will run in the respective language's locked-down container.

Features include:

• Building images on startup.
• Preparing containers on startup or on demand.
• Periodically cleanup running containers.
• Customizable settings for each image:
  • Maximum memory usage.
  • Maximum CPU usage.
  • Maximum evaluation time.
  • Maximum concurrent evaluations.
  • Maximum number of retries.
  • Maximum output size.

Requires Docker 18+ to operate.

Check the Releases tab for pre-built binaries.
The languages folder and an example configuration are also included.

You can use either stack or cabal.

• stack should be >= 2.1.1, cabal should be >= 2.4.0.0.
• GHC 8.8.3 is required if not already installed by stack or if using cabal.

Make sure the place where stack or cabal places binaries is in your PATH.

• For stack, you can get it with stack path --local-bin.
• For cabal, you should find it in $HOME/.cabal/bin (Linux) or %APPDATA%\cabal\bin (Windows).

Run stack install or cabal new-install inside the project folder.
Or, to build within the project, run stack build or cabal new-build.

Make sure the configuration is filled out, see config.example.yaml for an example.
Run myriad (or stack run or cabal new-run if you built within the project) to start the server.
The config and languages folder will default to ./config.yaml and ./languages.
You can configure this with --config and --languages.

List of enabled languages.
Example response:

["haskell", "javascript"]

Evaluate code.
JSON payload with language and code keys.
The language is as in the name of a subfolder in the languages directory.
Example payload:

{ "language": "haskell", "code": "main = print (1 + 1)" }

Example response:

{ "result": "2\n" }

Errors with 404 if language is not found, 504 if evaluation timed out, or 500 if evaluation failed for other reasons.

List of containers being handled by Myriad.

Kill all containers, giving back the names of the containers killed.