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Hi, I am Michi!
Head of Code at
@michilehr
YOU CAN’T TEST EVERYTHING
BUT YOU SHOULD MONITOR IT!
11. October 2022 @ Nerd-BBQ
"As Europe's leading photo booth provider, we have
made it our mission to help our brides and grooms
with their complete journey to their dream wedding.
This is something we work tirelessly on with our
team."
What is doing?
Philipp Schreiber - Co-Founder, KRUU.com
Photo Booth
Cycle
The Incident
Good
~12 MB/s
0.95 MB/s
Bad
1. When did it start?
2. Why did it happen?
3. How to prevent?
4. How to notice early?
Investigate
When did it start?
We had data in our Slack Channel, but…
1. Write a script to extract the data as CSV
2. Import data to MySQL
3. Write query to aggregate by day
4. Create nice graph
Started long time ago…
What happened?
Network configuration error
How to prevent?
No idea. Things like this happen
How to notice early?
How to notice early?
Alerts!
Query
Trigger
Notification
● 404 alert by threshold
● Auth failure alert by threshold to
detect brute force
● …
What next?
Thank you for your time!
Questions?
Feedback?
Notes?

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You cant Test everything, but you should monitor it