2020-06-09: Merge train isn’t succeeding for gitlab-com/runbooks
/label incident IncidentActive
Summary
Merge train isn’t succeeding for gitlab-com/runbooks
We are seeing some grpc errors following the K8s migration
https://log.gprd.gitlab.net/goto/835705afd601e5aaa6cce0948c9c26cf
The problem was introduced when we migrated the low-urgency-cpu-bound
shard to Kubernetes, where there is a network-policy that limits outbound traffic from the pods. While we did allow outbound connections to Gitaly when praefect was introduced we didn't include it in the whitelist. The impact of this incident was limited to projects using praefect.
Timeline
All times UTC.
2020-06-09
- 11:00 - Reports in slack of stuck merge-train pipelines https://gitlab.slack.com/archives/CB3LSMEJV/p1591702533284400 https://gitlab.slack.com/archives/C81PT2ALD/p1591706115273500
- 12:18 - jarv declares incident in Slack using
/incident declare
command. - 13:00 - issue resolved with gitlab-com/gl-infra/k8s-workloads/gitlab-com!260 (merged)
Click to expand or collapse the Incident Review section.
Incident Review
Summary
- Service(s) affected:
- Team attribution:
- Minutes downtime or degradation:
Metrics
Customer Impact
- Who was impacted by this incident? (i.e. external customers, internal customers)
- What was the customer experience during the incident? (i.e. preventing them from doing X, incorrect display of Y, ...)
- How many customers were affected?
- If a precise customer impact number is unknown, what is the estimated potential impact?
Incident Response Analysis
- How was the event detected?
- How could detection time be improved?
- How did we reach the point where we knew how to mitigate the impact?
- How could time to mitigation be improved?
Post Incident Analysis
- How was the root cause diagnosed?
- How could time to diagnosis be improved?
- Do we have an existing backlog item that would've prevented or greatly reduced the impact of this incident?
- Was this incident triggered by a change (deployment of code or change to infrastructure. If yes, have you linked the issue which represents the change?)?
5 Whys
Lessons Learned
Corrective Actions
Guidelines
Edited by Brent Newton