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You are working on troubleshooting a Dataflow pipeline that transfers data from Cloud Storage to BigQuery. During the investigation, you have detected a problem where the Dataflow worker nodes are unable to communicate with each other. Your organization's networking team uses Google Cloud network tags to establish and manage firewall rules. Your objective is to diagnose and resolve this issue while adhering to Google's best practices for networking security. What steps should you take?
You are working on troubleshooting a Dataflow pipeline that transfers data from Cloud Storage to BigQuery. During the investigation, you have detected a problem where the Dataflow worker nodes are unable to communicate with each other. Your organization's networking team uses Google Cloud network tags to establish and manage firewall rules. Your objective is to diagnose and resolve this issue while adhering to Google's best practices for networking security. What steps should you take?
Explanation:
The correct answer is B: Determine whether there is a firewall rule set to allow traffic on TCP ports 12345 and 12346 for the Dataflow network tag. Dataflow uses TCP ports 12345 and 12346 for communication between worker nodes. Google-recommended security practices involve using network tags and associated firewall rules to control access between Compute Engine instances, such as Dataflow workers.