Professional-Cloud-Architect Exam Dumps | A few days after JencoMart migrates the user credentials database to Google Cloud Platform and shuts

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Question 8/76

A few days after JencoMart migrates the user credentials database to Google Cloud Platform and shuts
down the old server, the new database server stops responding to SSH connections. It is still serving
database requests to the application servers correctly.
What three steps should you take to diagnose the problem? Choose 3 answers.

A. Delete the virtual machine (VM) and disks and create a new one

B. Delete the instance, attach the disk to a new VM, and investigate

C. Take a snapshot of the disk and connect to a new machine to investigate

D. Check inbound firewall rules for the network the machine is connected to

E. Connect the machine to another network with very simple firewall rules and investigate

F. Print the Serial Console output for the instance for troubleshooting, activate the interactive console, and
investigate

Correct Answer: C,D,F

Explanation/Reference:
Explanation:
D: Handling "Unable to connect on port 22" error message
Possible causes include:
There is no firewall rule allowing SSH access on the port. SSH access on port 22 is enabled on all

Compute Engine instances by default. If you have disabled access, SSH from the Browser will not
work. If you run sshd on a port other than 22, you need to enable the access to that port with a custom
firewall rule.
The firewall rule allowing SSH access is enabled, but is not configured to allow connections from GCP

Console services. Source IP addresses for browser-based SSH sessions are dynamically allocated by
GCP Console and can vary from session to session.
F: Handling "Could not connect, retrying..." error
You can verify that the daemon is running by navigating to the serial console output page and looking for
output lines prefixed with the accounts-from-metadata: string. If you are using a standard image but you do
not see these output prefixes in the serial console output, the daemon might be stopped. Reboot the
instance to restart the daemon.
References:
https://cloud.google.com/compute/docs/ssh-in-browser
https://cloud.google.com/compute/docs/ssh-in-browser

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