Exam Professional Cloud DevOps Engineer All Questions

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Exam Professional Cloud DevOps Engineer topic 1 question 111 discussion

Actual exam question from Google's Professional Cloud DevOps Engineer

Question #: 111
Topic #: 1

[All Professional Cloud DevOps Engineer Questions]

You are configuring connectivity across Google Kubernetes Engine (GKE) clusters in different VPCs. You notice that the nodes in Cluster A are unable to access the nodes in Cluster B. You suspect that the workload access issue is due to the network configuration. You need to troubleshoot the issue but do not have execute access to workloads and nodes. You want to identify the layer at which the network connectivity is broken. What should you do?

A. Install a toolbox container on the node in Cluster Confirm that the routes to Cluster B are configured appropriately.
B. Use Network Connectivity Center to perform a Connectivity Test from Cluster A to Cluster B.
C. Use a debug container to run the traceroute command from Cluster A to Cluster B and from Cluster B to Cluster A. Identify the common failure point.
D. Enable VPC Flow Logs in both VPCs, and monitor packet drops.

Show Suggested Answer

Suggested Answer: B 🗳️

by PrayasMohanty at Oct. 11, 2023, 11:44 a.m.

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Jason_Cloud_at

Highly Voted 1 year, 3 months ago

Selected Answer: B

I will got with B just to identify what happend in the network level

upvoted 9 times

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YushiSato

Highly Voted 1 year, 3 months ago

Selected Answer: B

I suspect that there is a mistake in the issue and that the Network Intelligence Center is correct, not the Network Connectivity Center. https://cloud.google.com/network-intelligence-center/docs/connectivity-tests/concepts/overview

upvoted 7 times

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xhilmi

Most Recent 1 year, 2 months ago

Selected Answer: B

To identify and troubleshoot the network connectivity issue between Google Kubernetes Engine (GKE) clusters in different VPCs where nodes in Cluster A cannot access nodes in Cluster B, the recommended action is to use Network Connectivity Center, as stated in (Option B). By performing a Connectivity Test from Cluster A to Cluster B using Network Connectivity Center, you can assess the network path and identify potential issues affecting the connectivity. This diagnostic tool helps pinpoint where the connectivity breaks down, enabling you to analyze the network configuration and resolve any misconfigurations or obstacles that might be hindering communication between the clusters. This approach provides a focused and efficient way to troubleshoot the specific network layer where the connectivity issue occurs without requiring execute access to workloads and nodes in the clusters.

upvoted 2 times

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Andrei_Z

1 year, 2 months ago

Selected Answer: B

Network Connectivity Center is not the greatest tool but in this case we don't really have any options with the restrictions in the question so B

upvoted 2 times

Feliphus

1 year, 1 month ago

Is it not easier the ans D, both VPC seems to be in the same GCP project ? It's only to allow the ingress rule in both VPC firewall rules If I read https://cloud.google.com/network-connectivity-center#simplified-data-transfer-over-google%E2%80%99s-network they talk to enable the communication between network outside the GCP scope But I realized I am the only who thinks in ans D

upvoted 1 times

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ReachTango73

1 year, 4 months ago

B as the Q says but do not have execute access to workloads and nodes… so can’t run toolbox

upvoted 4 times

PrayasMohanty

1 year, 4 months ago

May not have execute access to workload and node, but may have access to project and create a new toolbox pod for testing the route to Cluster B

upvoted 1 times

gouravjoshi05

1 year, 4 months ago

When you don't have execute access in this case even after creating a new pod also you will not be able to exec inside the pod as we don't have access.

upvoted 2 times

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PrayasMohanty

1 year, 4 months ago

Selected Answer: A

Vote for A Reference: https://cloud.google.com/container-optimized-os/docs/how-to/toolbox

upvoted 1 times

Jason_Cloud_at

1 year, 3 months ago

It says you dont have access to execute in workloads and node level, how can you install toolbox in the node ? I will go with B

upvoted 1 times

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