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Google Professional Cloud Architect (PR000213) Exam - Topic 1 Question 11 Discussion

You are developing your microservices application on Google Kubernetes Engine. During testing, you want to validate the behavior of your application in case a specific microservice should suddenly crash. What should you do?
B) Use Istio's fault injection on the particular microservice whose faulty behavior you want to simulate.
A) Add a taint to one of the nodes of the Kubernetes cluster. For the specific microservice, configure a pod anti-affinity label that has the name of the tainted node as a value.
C) Destroy one of the nodes of the Kubernetes cluster to observe the behavior.
D) Configure Istio's traffic management features to steer the traffic away from a crashing microservice.

Google Professional Cloud Architect (PR000213) Exam - Topic 1 Question 11 Discussion

Actual exam question for Google's Professional Cloud Architect (PR000213) exam
Question #: 11
Topic #: 1
[All Professional Cloud Architect (PR000213) Questions]

You are developing your microservices application on Google Kubernetes Engine. During testing, you want to validate the behavior of your application in case a specific microservice should suddenly crash. What should you do?

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Suggested Answer: B

Microservice runs on all nodes. The Micro service runs on Pod, Pod runs on Nodes. Nodes is nothing but Virtual machines. Once deployed the application microservices will get deployed across all Nodes. Destroying one node may not mimic the behaviour of microservice crashing as it may be running in other nodes.

link: https://istio.io/latest/docs/tasks/traffic-management/fault-injection/


by Brandon at May 08, 2022, 01:18 PM

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Dawne
10 months ago
Wait, can you really just destroy a node like that?
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Jenelle
10 months ago
D sounds interesting, but can it really handle crashes?
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Laura
11 months ago
Totally agree with B, it's safer and more controlled.
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Nathan
11 months ago
I think C is a bit extreme, right?
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Tayna
11 months ago
B is the best option for simulating faults.
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Phillip
11 months ago
I practiced a similar question where we had to manage traffic in Kubernetes, and I feel like option D could be relevant here too.
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Janessa
11 months ago
I'm not entirely sure, but I think adding a taint might not be the best approach for testing a crash scenario.
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Scarlet
11 months ago
I remember studying about Istio's fault injection, and it seems like a good way to simulate a crash without actually destroying anything.
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Viva
11 months ago
Destroying a node sounds extreme; I think there are safer methods to test microservice failures, like using Istio.
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Lourdes
11 months ago
Okay, I think I've got this. Focusing on the interfaces between components, Equivalence Partitioning seems like the most likely technique to find different types of defects.
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Kathrine
11 months ago
I'm feeling pretty confident on this one. The suppliers are the ones who would have the deepest understanding of the technical capabilities and limitations of the potential solutions, so they'd be the best source of information on the technical constraints. That's my pick for this question.
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Ligia
11 months ago
If I recall correctly, the 1:1 mapping issue could be a problem for scaling in VNet peering. It might not be the best solution for larger architectures.
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Dortha
11 months ago
Hmm, I'm a bit confused by this question. I'll need to review the Jenkins documentation to make sure I understand the workspace locking behavior.
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Sanjuana
11 months ago
From what I recall, option D makes sense since it addresses whether we need new capabilities for the launch. It's crucial to ensure everything is in place, right?
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