2022-03-01 file-cny-02 fails to deploy

Incident DRI

Current Status

This incident was caused because we did not clean up a file server. Earlier today there had been a production incident where the Gitaly OS upgrade had failed. We investigated a few alternatives and ended up creating an additional fileserver named file-cny-02 in order to test our hypothesis about why the upgrades had failed. Unfortunately we did not cleanup that server when we were done, and caused this incident.

Summary for CMOC notice / Exec summary:

1. Customer Impact: Human-friendly 1-sentence statement on impacted
2. Service Impact: service:: labels of services impacted by this incident
3. Impact Duration: start time UTC - end time UTC ( duration in minutes )
4. Root cause: TBD

Timeline

Recent Events (available internally only):

• Deployments
• Feature Flag Changes
• Infrastructure Configurations
• GCP Events (e.g. host failure)

All times UTC.

2022-03-01

• 20:02 - gprd-cny-gitaly fails during the gprd-cny deployment https://ops.gitlab.net/gitlab-com/gl-infra/deployer/-/jobs/6438053
• 20:11 - @skarbek declares incident in Slack.
• 20:39 - Root cause is identified #6458 (comment 859159087)
• 21:45- file-cny-02 was rebuild from scratch.
• 21:58 - gprd-cny-gitaly is successful https://ops.gitlab.net/gitlab-com/gl-infra/deployer/-/jobs/6439098

Takeaways

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Corrective Actions

Corrective actions should be put here as soon as an incident is mitigated, ensure that all corrective actions mentioned in the notes below are included.

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Incident Review

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Customer Impact

1. Who was impacted by this incident? (i.e. external customers, internal customers)
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2. What was the customer experience during the incident? (i.e. preventing them from doing X, incorrect display of Y, ...)
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3. How many customers were affected?
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4. If a precise customer impact number is unknown, what is the estimated impact (number and ratio of failed requests, amount of traffic drop, ...)?
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What were the root causes?

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Incident Response Analysis

1. How was the incident detected?
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2. How could detection time be improved?
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3. How was the root cause diagnosed?
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4. How could time to diagnosis be improved?
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5. How did we reach the point where we knew how to mitigate the impact?
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6. How could time to mitigation be improved?
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7. What went well?
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Post Incident Analysis

1. Did we have other events in the past with the same root cause?
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2. Do we have existing backlog items that would've prevented or greatly reduced the impact of this incident?
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3. Was this incident triggered by a change (deployment of code or change to infrastructure)? If yes, link the issue.
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What went well?

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Guidelines

• Blameless RCA Guideline

Resources

1. If the Situation Zoom room was utilised, recording will be automatically uploaded to Incident room Google Drive folder (private)