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Exam Associate Cloud Engineer topic 1 question 94 discussion

Actual exam question from Google's Associate Cloud Engineer
Question #: 94
Topic #: 1
[All Associate Cloud Engineer Questions]

You create a Deployment with 2 replicas in a Google Kubernetes Engine cluster that has a single preemptible node pool. After a few minutes, you use kubectl to examine the status of your Pod and observe that one of them is still in Pending status:

What is the most likely cause?

  • A. The pending Pod's resource requests are too large to fit on a single node of the cluster.
  • B. Too many Pods are already running in the cluster, and there are not enough resources left to schedule the pending Pod.
  • C. The node pool is configured with a service account that does not have permission to pull the container image used by the pending Pod.
  • D. The pending Pod was originally scheduled on a node that has been preempted between the creation of the Deployment and your verification of the Pods' status. It is currently being rescheduled on a new node.
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️
by torres_xyz at June 11, 2020, 2:30 p.m.

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ESP_SAP
Highly Voted 4 years, 8 months ago
Correct Answer is (B): Reasons for a Pod Status Pending: Troubleshooting Reason #1: Not enough CPU Troubleshooting Reason #2: Not enough memory Troubleshooting Reason #3: Not enough CPU and memory https://managedkube.com/kubernetes/k8sbot/troubleshooting/pending/pod/2019/02/22/pending-pod.html
upvoted 59 times
SSPC
4 years, 8 months ago
I agree with you. The correct answer is B
upvoted 5 times
[Removed]
4 years, 7 months ago
D gives you the reason why the resource could not be available a it was preempted
upvoted 3 times
tavva_prudhvi
4 years, 1 month ago
If it was preempted, then it has to be restarted right? then it will show its failing not pending, check the articles mentioned by ESP_SAP
upvoted 3 times
ashtonez
2 years, 1 month ago
No, it will show as pending initially while realocating
upvoted 1 times
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Finger41
3 years, 11 months ago
Its in a deployment, the pod will be recreated. There is insufficient resources in the node, not because its preemptible but because there is no memory/cpu......
upvoted 2 times
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Linus11
4 years ago
The real crux of this question is the mention about "Pre-emptible Node pool". That need to take into consider while determining the answer. If we choose B, then the importance of "Pre-emptible node pool" is not there. Whether the node pool is pre-emptible or not, resource scarcity can lead to pending pods. When we consider the mention of "Pre-emptible Node Poll" , then the answer is obviously D. if a pre-meptible Node get pre-empted there will be a delay in cluster to sync it. Answer is D.
upvoted 28 times
iooj
7 months, 4 weeks ago
they just wanted to confuse us and added "preemptible", be strong
upvoted 1 times
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alexgrig
3 years, 7 months ago
Questions says "Single Node" at that case the second pod can't be in running state.
upvoted 4 times
brvinod
3 years, 2 months ago
A node can have multiple pods. So that is not a problem.
upvoted 2 times
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MidhunJose
3 years, 3 months ago
It says a single node pool, not a single node. Meaning there can be multiple nodes, right?
upvoted 10 times
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brvinod
3 years, 2 months ago
Pre-emptible would have been an issue if the cluster had more than one node. The question clearly states that it is a single node cluster. That means if that single VM was pre-empted, neither of the pods should have been running. Since one pod is running, that means that (the only) VM is running. So, the reason the second pod is still pending because the VM is not having enough resources to run both the pods. Hence B.
upvoted 9 times
mplibunao
2 years, 10 months ago
Actually the question stated "single preemptible node pool" and not "single node" so it's possible that there are multiple nodes and one of the node on which the pod was scheduled on was preempted
upvoted 4 times
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cloudenthu01
Highly Voted 4 years, 10 months ago
D is correct as the node on which pod was scheduled to run was preempted & now this pod is scheduled to run on different preemtible node from the node-pool
upvoted 21 times
myuniquename
3 years, 7 months ago
Incorrect. There is a single preemtible instance, if it was preempted then both pods would show as 'Pending'. B is correct.
upvoted 6 times
ashtonez
2 years, 1 month ago
No, because one of the pods may run on another node that its still up
upvoted 2 times
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obeythefist
3 years, 1 month ago
> There is a single preemtible instance Where does it say that? It doesn't. Don't make things up. There's a single pre-emptible node pool. A single pool is not the same as a single node.
upvoted 11 times
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85c887f
Most Recent 1 month, 1 week ago
Selected Answer: B
Correct Answer is B. As one of the indicators of incorrect D option is 0 in Restart section. If D was correct answer we would see in Restart number > 0.
upvoted 1 times
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navel
2 months ago
Selected Answer: B
B is correct as 0 restarts of the pod
upvoted 2 times
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swktopic
2 months ago
Selected Answer: B
restart is 0, so B is correct
upvoted 2 times
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peddyua
3 months, 1 week ago
Selected Answer: D
Preemptible nodes can be terminated at any time, and if there are not enough available preemptible nodes at the moment to accommodate the pod, it will stay in Pending.
upvoted 1 times
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1e62a4f
5 months ago
Selected Answer: B
preemptible node can be stopped anytime. It can be not available as long as long resources are not available.
upvoted 1 times
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denno22
7 months, 1 week ago
Selected Answer: D
The most likely cause is given in the question. We have a single preemptible node pool.
upvoted 1 times
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iooj
7 months, 4 weeks ago
Selected Answer: B
100% - not enough CPU / memory.
upvoted 1 times
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Timfdklfajlksdjlakf
8 months ago
Selected Answer: D
The correct answer is D.
upvoted 1 times
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BuenaCloudDE
9 months, 3 weeks ago
Selected Answer: D
I think so because main word of the question is preemptible pool nodes it can initialize some latency during creating node to find compliance machine.
upvoted 1 times
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tmwf
1 year, 2 months ago
Selected Answer: B
B is more correct. Maybe Troubleshooting Reason Not enough CPU or Memory or both of them.
upvoted 1 times
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blackBeard33
1 year, 2 months ago
Selected Answer: B
I would go for B
upvoted 1 times
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moumou
1 year, 2 months ago
Selected Answer: D
D good choice
upvoted 1 times
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jareiner
1 year, 2 months ago
The term 'preemptible node pool' is in the question. D is the answer.
upvoted 1 times
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Cynthia2023
1 year, 4 months ago
Selected Answer: B
I would go with B. While D is possible, this scenario is less likely compared to the resource constraint issue, especially if the Pending status is observed consistently over a few minutes. Preemption would usually lead to a quicker rescheduling unless there are resource constraints.
upvoted 1 times
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yash_1199
1 year, 4 months ago
Selected Answer: B
B is correct
upvoted 1 times
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