On November 14, 2023, starting at 20:19 UTC, a surge of workflow failures alerted Pantheon engineering to an issue pulling container images from an upstream vendor registry. Confirmation of the upstream issue was quickly confirmed via the vendor status page site detailing the external service outage impacting container image push and pull operations. Upon upstream remediations, the workflow failure rate returned below threshold on November 14, 2023 at 23:25 UTC.
We have identified areas to improve our infrastructure to prevent issues like this from occurring in the future.