SUMMARY:
On Monday 9 March 2015, deployments of Google App Engine applications
running on Beta Managed VMs experienced intermittent deployment failures
for a duration of 75 minutes. Whilst Managed VMs is still in Beta, we
apologize for any impact this incident may have had on your service or
application.
DETAILED DESCRIPTION OF IMPACT:
Between 18:20 and 19:40 PDT, users of Google App Engine Managed VMs (Beta)
experienced intermittent deployment failures. Users impacted by this
incident would see gcloud or appcfg deploy commands return with error
messages. Over this period, 81% of deployments returned errors.
ROOT CAUSE:
The Managed VMs (Beta) deployment system relies on the Google Cloud Storage
JSON API, which experienced a 5% failure rate during this time period. For
details, see the Cloud Storage incident post:
https://status.cloud.google.com/incident/storage/16021.
REMEDIATION AND PREVENTION:
The primary remediation for this incident is described in the Cloud Storage
incident report. In addition to the steps outlined there, Google engineers
are tuning the systems that monitor Managed VMs application deployments to
alert earlier, which will facilitate speedier resolution.