Add wiki entry for Cloud_TooManyAppEngineVersions alert

[stephen-soltesz]

After the Cloud_TooManyAppEngineVersions fired in staging, I created m-lab/etl#1042 to help do this automatically. This is also a good time to update the description to reference the Alerts and troubleshooting wiki.

@SaiedKazemi what additional information would be helpful here or in the wiki?

@nkinkade also does this look right to you?

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This change is 

[nkinkade]

The ops-tracker wiki entry references mlab-sandbox for the AppEngine console link. It should probably reference mlab-oti instead. Thanks for growing the "playbook" wiki!

Reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: complete! 1 of 1 approvals obtained (waiting on @SaiedKazemi)

[stephen-soltesz]

Thank you. Fixed the reference to mlab-oti.

Reviewable status: complete! 1 of 1 approvals obtained (waiting on @SaiedKazemi)

[SaiedKazemi]

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config/federation/prometheus/alerts.yml, line 969 at r1 (raw file):

    annotations:
      summary: Too many AppEngine versions for the project.
      description: https://github.com/m-lab/ops-tracker/wiki/Alerts-&-Troubleshooting#cloud_toomanyappengineversions

Looking at the contents of this link, I have two comments under Troubleshooting:

1. It seems to me that the second bullet should be a part of the first bullet or a sub-bullet of it.
2. I think the third bullet will be more clear if it read: ... includes a garbage collection script called delete-appengine.sh .... Run this script manually to remove old service versions.

[stephen-soltesz]

Reviewable status: complete! 1 of 1 approvals obtained (waiting on @SaiedKazemi)

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config/federation/prometheus/alerts.yml, line 969 at r1 (raw file):

Previously, SaiedKazemi (Saied Kazemi) wrote…

Looking at the contents of this link, I have two comments under Troubleshooting:

1. It seems to me that the second bullet should be a part of the first bullet or a sub-bullet of it.
2. I think the third bullet will be more clear if it read: ... includes a garbage collection script called delete-appengine.sh .... Run this script manually to remove old service versions.

Thank you, I've updated the entry. PTAL?

[stephen-soltesz]

I believe @SaiedKazemi will be OOO - so I'll merge this TBR if he has more feedback.

[SaiedKazemi]

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config/federation/prometheus/alerts.yml, line 969 at r1 (raw file):

Previously, stephen-soltesz (Stephen Soltesz) wrote…

Thank you, I've updated the entry. PTAL?

Looks good. Thanks for the changes.

Code quote:

https://github.com/m-lab/ops-tracker/wiki/Alerts-&-Troubleshooting#cloud_toomanyappengineversions