Secret Manager for credentials in GCP - Step-by-Step Execution

Process Flow - Secret Manager for credentials

Create Secret

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Add Secret Version

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Access Secret

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Use Secret in App

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Rotate Secret (Optional)

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Delete Secret (Optional)

This flow shows how you create a secret, add versions, access it securely, use it in your app, and optionally rotate or delete it.

Execution Sample

GCP

gcloud secrets create my-db-password --replication-policy="automatic"
gcloud secrets versions add my-db-password --data-file=password.txt
gcloud secrets versions access latest --secret=my-db-password

This code creates a secret, adds a password version, and accesses the latest secret version.

Process Table

Step	Action	Input/Command	Result/Output	Notes
1	Create Secret	gcloud secrets create my-db-password --replication-policy="automatic"	Secret 'my-db-password' created	Secret container ready to hold versions
2	Add Secret Version	gcloud secrets versions add my-db-password --data-file=password.txt	Version 1 added to 'my-db-password'	Password stored securely
3	Access Secret	gcloud secrets versions access latest --secret=my-db-password	Outputs secret value (password)	App can retrieve secret when needed
4	Use Secret in App	App reads secret via API or CLI	App authenticates using secret	Secret never stored in code
5	Rotate Secret (Optional)	Add new version with updated password	New version added, old versions retained	Supports secret rotation without downtime
6	Delete Secret (Optional)	gcloud secrets delete my-db-password	Secret deleted permanently	Removes secret and all versions

💡 Process ends after secret is created, used, and optionally rotated or deleted.

Status Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 5	Final
Secret Container	None	Created	Created with Version 1	Created with Version 1	Created with Versions 1 & 2	Deleted (optional)
Secret Versions	None	None	Version 1	Version 1	Versions 1 and 2	None (if deleted)
Secret Value	None	None	Password from password.txt	Password output on access	Updated password in Version 2	None (if deleted)

Key Moments - 3 Insights

Why do we add secret versions instead of replacing the secret?

Because each version is immutable and allows safe rotation without losing old secrets. See execution_table step 5 where a new version is added.

How does the app get the secret without storing it in code?

The app accesses the secret at runtime via API or CLI, as shown in execution_table step 3 and 4, keeping secrets out of code.

What happens if we delete the secret container?

All secret versions and values are permanently deleted, as shown in execution_table step 6 and variable_tracker final state.

Visual Quiz - 3 Questions

Look at the execution table, what is the result after Step 2?

A Version 1 added to the secret

B Secret container created with no versions

C Secret deleted

D Secret accessed and output shown

💡 Hint

Check the 'Result/Output' column for Step 2 in the execution_table.

At which step does the app use the secret to authenticate?

A Step 1

B Step 3

C Step 4

D Step 6

💡 Hint

Look at the 'Action' and 'Notes' columns in execution_table for app usage.

If you add a new secret version, what changes in the variable tracker?

A Secret container is deleted

B Secret versions increase by one

C Secret value becomes empty

D Secret container is recreated

💡 Hint

See 'Secret Versions' row in variable_tracker after Step 5.

Concept Snapshot

Secret Manager stores credentials securely.
Create a secret container.
Add secret versions to store values.
Access secrets at runtime, not in code.
Rotate secrets by adding new versions.
Delete secrets to remove all versions.

Full Transcript

This lesson shows how to use Google Cloud Secret Manager to store and manage credentials securely. First, you create a secret container. Then you add secret versions that hold the actual passwords or keys. Your app accesses these secrets at runtime via API or CLI, so secrets are never hardcoded. You can rotate secrets by adding new versions without downtime. Finally, you can delete secrets to remove all stored versions. The execution table traces each step from creation to usage and optional rotation or deletion. The variable tracker shows how secret containers and versions change over time. Key moments clarify why versions are immutable and how apps use secrets securely. The quiz tests understanding of these steps and states.