SLATE Quarterly Updates

Welcome to another round of SLATE project updates! It’s been quite some time since our last update, so this post will be especially long. On the plus side, we have a lot of cool and interesting new things to tell you about!

As always, we encourage you to try things out and let us know what’s working, what’s not, what can be improved and so on. For discussion, news and troubleshooting, the SLATE Slack workspace is the best place to reach us!


SLATE Console

  • Assorted bug fixes, hardening and cleanup.

SLATE Website


  • The production SLATE federation now flagged to use Helm 3 by default
  • Edge cluster registration refactored to address problems with auto-detection selecting private IP addresses.
  • Improved caching of available applications in the API server.
  • Updated the CLI client program to more consistently use exit status to signal failures, which should improve its usefulness in scripts.
  • Numerous fixes to the API server and catalog build system to account for changes in Helm 3.
  • Added support in the API server for automatically generating descriptions of edge cluster location using an external geocoding service.
  • Corrected mistakes in the API servers ability to collect and report storage and priority class information for edge clusters.
  • Expanded the CLI client to handle managing components like role-based access control and ingress controllers which are part of SLATE but require edge administrator privileges to manipulate to streamline installation and support updating and removal.

SLATE Infrastructure

  • Configured all virtual machines used to form the SLATE platform which are housed at the University of Chicago to be scanned with InsightVM for security vulnerabilities
  • Restructured automated builds of the CLI client to use the latest version of Alpine Linux for Linux builds, and a CentOS-based cross compiler to produce builds for Mac OS
  • Work ongoing to improve Puppet infrastructure used by SLATE platform and clusters at the University of Chicago, University of Michigan, and University of Utah.
  • Work ongoing to better test SLATE client/server and DynamoDB

SLATE Sandbox:

  • Rebuilt with Kubernetes v1.18.0 (Muhammad Akhdor, Soundar Rajendran)


  • MiniSLATE now uses K3S as its Kubernetes backend to provide for a more lightweight experience (Mitchell Steinman)


  • OSG HostedCE is now marked ‘stable’. The HostedCE application is being used in production by the the University of Utah and the University of Illinois (OSG Software Team, Mitchell Steinman, Lincoln Bryant, Chris Weaver)
  • Logging sidecar pattern has now been integrated into HTCondor worker and perfSONAR charts
  • Many SLATE charts have now been updated to have their container image colocated with the Chart definition (Pierce Jorgensen)
  • OSG GridFTP and Globus Connect v4 SLATE applications have been overhauled and can now support specifiable control and data port ranges (Lincoln Bryant)
  • SLATE applications now support Network Policies, and will be integrated into all charts in coming weeks (Skyler Griffith)
  • The Open Science Grid has contributed an “Open Science CE” application, which is being used to support COVID19 research efforts. (Brian Lin, Mátyás Selmeci, et al.)
  • MariaDB has landed in the stable catalog (Lincoln Bryant)
  • MinIO has been stabilized (Chris Weaver)
  • HTCondor submit and central manager charts are under active development in the incubator catalog. (Chris Weaver)
  • Jupyter with HTCondor is under active development in the Stable catalog (Muhammad Akhdhor)
  • OSG Frontier Squid Chart extended to support advanced configuration options (Chris Weaver)
  • Work to build Chart for Open OnDemand with Keycloak-based authentication ongoing (Jason Stidd)


  • Monitoring infrastructure ported to Helm 3 (Gabriele Carcassi)
  • Ingress controller modified to allow embedded Grafana charts in the SLATE Console. (Gabriele Carcassi)
  • Prometheus and Thanos monitoring are now working for clusters at the University of Chicago, the University of Michigan, and the University of Utah, using [OSiRIS][] storage infrastructure (Gabriele Carcassi)
  • Work continues to refine the SLATE monitoring infrastructure to be easy to use by sites (Chris Weaver, Gabriele Carcassi)
  • Work ongoing to develop CheckMK-based monitoring for the SLATE platform (David Orgill)


  • University of Wisconsin-Madison has added a new SLATE cluster, chtc-whiskey
  • A new SLATE site has been added for the ATLAS collaboration in Prague, Czech Republic
  • The Texas Advanced Computing Center has added a SLATE node for the Frontera supercomputer
The SLATE Team