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The WLCG unites resources from over 169 sites spread across the world and the number is expected to grow in the coming years. However, setting up and configuring new sites to support WLCG workloads is still no straightforward task and often requires significant assistance from WLCG experts. A survey presented in CHEP 2016 revealed a strong wish among site admins for reduction of overheads through the use of prefab Docker containers or OpenStack VM images, along with the adoption of popular tools like Puppet for configuration. In 2017, the Lightweight Sites project a.k.a. the SIMPLE Grid Project was initiated to construct shared community repositories providing such building blocks. The SIMPLE Grid project is an acronym for Solution for Installation, Management and Provisioning of Lightweight Elements on the Grid (Worldwide LHC Computing Grid). It comprises of a modular and extensible core system that abstracts low-level details through a YAML based site-wide configuration file which is used to configure all distributed components through a single command. To accommodate the diverse scenarios at different sites, the project will enable site admins to cherry pick their background technologies and methodologies for orchestration (Puppet, Ansible, ...), clustering (Docker Swarm, Kubernetes, ...) and networking (dedicated networks, custom overlay networks or a combination of both).

Project Structure

The WLCG is a very diverse ecosystem. There are various flavors of Compute Elements(CreamCE, ARC, CondorCE), Batch systems( Torque/pbs, Slurm, Condor), Middleware packages that can be used to set up a grid site. Moreover, Site Admins have their own preferences for tools they wish to use to configure and maintain their infrastructure (Puppet, Ansible, YAIM). in terms of available Grid Components and Infrastructure management tools

The Community

The SIMPLE Grid is an open source and community driven effort!

For Site Admins/Potential Users

For Developers

For Community

-- MayankSharma - 2018-07-02

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Topic revision: r1 - 2018-07-02 - MayankSharma
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