Cloud Shell and gcloud CLI in GCP - Step-by-Step Execution

Process Flow - Cloud Shell and gcloud CLI

Open Cloud Shell

↓

Cloud Shell Terminal Ready

↓

Type gcloud command

↓

gcloud CLI processes command

↓

Command executed on GCP

↓

Output shown in Cloud Shell

↓

User reviews output or runs next command

This flow shows how a user opens Cloud Shell, types a gcloud command, which is processed and executed on Google Cloud, then the output is shown back in Cloud Shell.

Execution Sample

GCP

gcloud compute instances list

This command lists all the virtual machine instances in the current Google Cloud project.

Process Table

Step	Action	Input/Command	Process	Output/Result
1	Open Cloud Shell	N/A	Cloud Shell terminal starts with pre-configured environment	Terminal ready with prompt
2	Type command	gcloud compute instances list	Command entered in terminal	Command sent to gcloud CLI
3	gcloud CLI processes	gcloud compute instances list	CLI authenticates user and checks project	Validates credentials and project
4	Execute command	List VM instances	Request sent to Google Cloud Compute API	API returns list of VM instances
5	Display output	List of VM instances	Cloud Shell terminal prints output	Table of VM instances shown
6	User reviews output	N/A	User reads the list	User sees VM names, zones, statuses
7	End	N/A	No further commands	Session remains open for next command

💡 User stops entering commands or closes Cloud Shell; session remains active until closed.

Status Tracker

Variable	Start	After Step 2	After Step 3	After Step 4	After Step 5	Final
Command Input	None	gcloud compute instances list	gcloud compute instances list	gcloud compute instances list	gcloud compute instances list	None
Authentication Status	Not authenticated	Not authenticated	Authenticated	Authenticated	Authenticated	Authenticated
API Response	None	None	None	List of VM instances	List of VM instances	List of VM instances
Output Displayed	None	None	None	None	Table of VM instances	Table of VM instances

Key Moments - 3 Insights

Why does the gcloud CLI need to authenticate before running the command?

Because the CLI needs permission to access your Google Cloud resources, it authenticates first as shown in step 3 of the execution_table.

What happens if there are no VM instances in the project?

The API response in step 4 would be an empty list, so the output displayed in step 5 would show no instances found.

Does Cloud Shell run commands locally on your computer?

No, Cloud Shell runs commands in a Google-managed virtual machine in the cloud, as shown in step 1 and 4.

Visual Quiz - 3 Questions

Look at the execution_table, what is the output shown at step 5?

A Empty terminal

B Authentication error message

C Table of VM instances

D Command prompt only

💡 Hint

Refer to the 'Output/Result' column in row 5 of the execution_table.

At which step does the gcloud CLI authenticate the user?

A Step 3

B Step 2

C Step 4

D Step 5

💡 Hint

Check the 'Process' column in the execution_table for authentication details.

If the user closes Cloud Shell after step 6, what happens to the session?

A Session remains active indefinitely

B Session closes and all data is lost

C Session remains open for next command

D Session is paused and resumes later

💡 Hint

Look at the 'exit_note' in the execution_table for session behavior.

Concept Snapshot

Cloud Shell is a browser-based terminal with gcloud CLI pre-installed.
You type gcloud commands to manage Google Cloud resources.
Commands authenticate your identity before running.
Output appears directly in Cloud Shell terminal.
Session stays active until you close it.

Full Transcript

Cloud Shell is a web-based terminal that lets you run gcloud CLI commands without installing anything locally. When you open Cloud Shell, you get a ready-to-use terminal connected to your Google Cloud account. You type commands like 'gcloud compute instances list' to see your virtual machines. The gcloud CLI first authenticates you to ensure you have permission. Then it sends your command to Google Cloud services, which respond with data. This data is shown back in the terminal. You can keep running commands until you close Cloud Shell, which ends your session.

Practice

1. What is the primary purpose of Google Cloud Shell?

easy

A. To create graphical user interfaces for cloud services

B. To provide a browser-based command-line interface pre-configured for Google Cloud

C. To store large amounts of data in the cloud

D. To host virtual machines for running applications

Solution

1. Step 1: Understand Cloud Shell functionality

   Cloud Shell is a tool that gives you a command-line environment in your browser, ready to use with Google Cloud tools.

2. Step 2: Compare options with Cloud Shell purpose

   Options A, B, and C describe other cloud services, not Cloud Shell's main use.

3. Final Answer:

   To provide a browser-based command-line interface pre-configured for Google Cloud -> Option B

4. Quick Check:

   Cloud Shell = browser CLI [OK]

Hint: Cloud Shell is a browser terminal for Google Cloud commands [OK]

Common Mistakes:

• Confusing Cloud Shell with VM hosting
• Thinking Cloud Shell stores data
• Assuming Cloud Shell creates GUIs

2. Which of the following is the correct command to list all active Google Cloud projects using gcloud CLI?

easy

A. gcloud list projects

B. gcloud projects show

C. gcloud projects list

D. gcloud list all-projects

Solution

1. Step 1: Recall gcloud CLI syntax for listing projects

   The correct command to list projects is 'gcloud projects list'.

2. Step 2: Verify other options

   Options A, C, and D do not follow the correct gcloud command structure and will cause errors.

3. Final Answer:

   gcloud projects list -> Option C

4. Quick Check:

   List projects command = gcloud projects list [OK]

Hint: Remember: gcloud <resource> list to show resources [OK]

Common Mistakes:

• Swapping 'list' and 'projects' order
• Using 'show' instead of 'list'
• Adding extra words like 'all-projects'

3. What will be the output of the following command run in Cloud Shell?

gcloud config get-value project

medium

A. An error saying 'command not found'

B. A list of all available projects

C. The current user's email address

D. The currently set Google Cloud project ID

Solution

1. Step 1: Understand the command purpose

   'gcloud config get-value project' retrieves the project ID currently set in gcloud configuration.

2. Step 2: Analyze other options

   A list of all available projects lists projects, which requires 'projects list'. An error saying 'command not found' is incorrect because the command exists. The current user's email address returns user info, not project.

3. Final Answer:

   The currently set Google Cloud project ID -> Option D

4. Quick Check:

   Get project config = current project ID [OK]

Hint: get-value returns current config setting [OK]

Common Mistakes:

• Expecting a list of projects instead of one project
• Confusing project ID with user email
• Assuming command is invalid

4. You run the command gcloud compute instances create my-vm --zone=us-central1-a but get an error saying the zone is invalid. What is the most likely fix?

medium

A. Change the zone to a valid one like us-central1-b

B. Remove the --zone flag completely

C. Use --region instead of --zone

D. Rename the instance to a different name

Solution

1. Step 1: Understand zone error cause

   The error indicates the specified zone 'us-central1-a' is invalid or unavailable in your project or region.

2. Step 2: Fix by choosing a valid zone

   Changing to a valid zone like 'us-central1-b' resolves the error. Removing the flag or using region instead won't fix zone-specific errors. Renaming instance is unrelated.

3. Final Answer:

   Change the zone to a valid one like us-central1-b -> Option A

4. Quick Check:

   Zone error = pick valid zone [OK]

Hint: Check available zones with 'gcloud compute zones list' [OK]

Common Mistakes:

• Removing zone flag instead of correcting it
• Using region flag where zone is required
• Changing instance name instead of zone

5. You want to automate setting the default project in Cloud Shell for multiple users. Which gcloud CLI command sequence correctly sets the project and verifies it?

hard

A. gcloud config set project my-project-id && gcloud config get-value project

B. gcloud projects set my-project-id && gcloud projects get my-project-id

C. gcloud set project my-project-id && gcloud get project

D. gcloud config project set my-project-id && gcloud config project get

Solution

1. Step 1: Identify correct command to set project

   The correct command to set the default project is 'gcloud config set project '.

2. Step 2: Verify project setting

   To verify, use 'gcloud config get-value project' which returns the current project ID.

3. Step 3: Check other options for correctness

   Options B, C, and D use invalid command syntax and will cause errors.

4. Final Answer:

   gcloud config set project my-project-id && gcloud config get-value project -> Option A

5. Quick Check:

   Set and get project config = gcloud config set project my-project-id && gcloud config get-value project [OK]

Hint: Use 'gcloud config set' and 'gcloud config get-value' for config changes [OK]

Common Mistakes:

• Using incorrect command order or syntax
• Confusing 'projects' commands with 'config' commands
• Trying to set project with invalid commands