Introduction
This section shows how to use container technology in the Computational Cluster HPC of Poblenou.
Singularity provides a container platform. That is ideal for developers and teams looking to get started and experimenting with container-based applications in a simple, portable and reproducible way.
Technical Information
Singularity engine
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Version: 3.8.5-2el8
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Architecture: Standalone engine
Registry Server
- Docker Registry Frontend v2
- Docker Registry Server 2.6.2
Information
Some tips that you may know before start working
Images
- Only SIF (Singularity Image Format) images are supported.
- Docker Store (DockerHub), Registry Server and other public repositories are supported to deploy containers but you will have to convert the format to SIF images.
Containers
- You can use singularity commands with your user, not root permissions are necessary.
- Home directories are automatically mapped inside the container, for datatasets is mandatory specify the path.
- Users aren't allowed to open a root session inside the container, your UID and GID are directly mapped.
- Containers will be destroyed after the execution process.
- Containers cannot communicate each other. Only one job is created per container.
- CPU, RAM, GPU resources are managed by queue engine, needs must be declared in the Slurm Job settings.
- Batch and interactive sessions are available; cannot export X sessions, X-Server isn't supported.
