2021-01-22: Brief glitch across all services
Summary
There was a brief glitch across all services. It lasted (subjectively) about 20 seconds. Everything appears to have come back without any intervention. It caused a lot of alerts, especially the SLO/SLI alerts.
https://dashboards.gitlab.net/d/RZmbBr7mk/gitlab-triage?orgId=1&refresh=30s&from=1611275561515&to=1611297161515&var-env=gprd&var-environment=gprd&var-prometheus=prometheus-01-inf-gprd&var-prometheus_app=prometheus-app-01-inf-gprd&var-backend=All&var-type=All&var-stage=main
More information will be added as we investigate the issue.
Timeline
All times UTC.
2021-01-22
-
06:31
- @devin declares incident in Slack.
Corrective Actions
Click to expand or collapse the Incident Review section.
Incident Review
Summary
- Service(s) affected:
- Team attribution:
- Time to detection:
- 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 impact (number and ratio of failed requests, amount of traffic drop, ...)?
- ...
What were the root causes?
Incident Response Analysis
-
How was the incident detected?
- ...
-
How could detection time be improved?
- ...
-
How was the root cause diagnosed?
- ...
-
How could time to diagnosis be improved?
- ...
-
How did we reach the point where we knew how to mitigate the impact?
- ...
-
How could time to mitigation be improved?
- ...
-
What went well?
- ...
Post Incident Analysis
-
Did we have other events in the past with the same root cause?
- ...
-
Do we have existing backlog items 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, link the issue.
- ...
Lessons Learned
Guidelines
Resources
- If the Situation Zoom room was utilised, recording will be automatically uploaded to Incident room Google Drive folder (private)
Incident Review Stakeholders
Edited by Devin Sylva