Storing secrets in Azure - Step-by-Step Execution

Process Flow - Storing secrets

Start

↓

Create Key Vault

↓

Add Secret to Vault

↓

Access Secret from Vault

↓

Use Secret in App

↓

End

This flow shows creating a secure vault, storing a secret, retrieving it, and using it safely.

Execution Sample

Azure

az keyvault create --name MyVault --resource-group MyGroup --location eastus
az keyvault secret set --vault-name MyVault --name MySecret --value "MyPassword123"
az keyvault secret show --vault-name MyVault --name MySecret

This code creates a vault, stores a secret, and retrieves it.

Process Table

Step	Action	Command	Result	Notes
1	Create Key Vault	az keyvault create --name MyVault --resource-group MyGroup --location eastus	Key Vault 'MyVault' created	Vault ready to store secrets
2	Add Secret	az keyvault secret set --vault-name MyVault --name MySecret --value "MyPassword123"	Secret 'MySecret' stored	Secret securely saved in vault
3	Retrieve Secret	az keyvault secret show --vault-name MyVault --name MySecret	Value: "MyPassword123"	Secret retrieved for use
4	Use Secret	Application reads secret from vault	App uses secret securely	Secret not exposed in code
5	End	-	-	Process complete

💡 All steps completed successfully; secret stored and accessed securely.

Status Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4	Final
KeyVaultName	None	MyVault	MyVault	MyVault	MyVault	MyVault
SecretName	None	None	MySecret	MySecret	MySecret	MySecret
SecretValue	None	None	MyPassword123	MyPassword123	Used by app	Used by app

Key Moments - 2 Insights

Why do we store secrets in a Key Vault instead of directly in application code?

Storing secrets in a Key Vault keeps them secure and separate from code, reducing risk of exposure. See execution_table step 4 where the app uses the secret without embedding it in code.

What happens if you try to retrieve a secret before it is stored?

The retrieval command will fail because the secret does not exist yet. In the execution_table, step 3 shows retrieval after storing in step 2, ensuring success.

Visual Quiz - 3 Questions

Look at the execution_table, what is the result of step 2?

A Key Vault created

B Secret 'MySecret' stored

C Secret retrieved

D Application uses secret

💡 Hint

Check the 'Result' column in row for step 2 in execution_table.

At which step does the application use the secret securely?

A Step 1

B Step 2

C Step 4

D Step 3

💡 Hint

Look at the 'Action' column in execution_table for when the app uses the secret.

If the secret value changes, which variable_tracker column shows the updated value?

A After Step 2

B After Step 1

C After Step 3

D After Step 4

💡 Hint

SecretValue is set when the secret is stored, see variable_tracker after step 2.

Concept Snapshot

Storing secrets in Azure Key Vault:
- Create a Key Vault to hold secrets securely.
- Add secrets using 'az keyvault secret set'.
- Retrieve secrets with 'az keyvault secret show'.
- Use secrets in apps without embedding them in code.
- Keeps secrets safe and manageable.

Full Transcript

This lesson shows how to store secrets securely using Azure Key Vault. First, you create a vault to hold secrets. Then you add a secret like a password to the vault. Next, you retrieve the secret when needed. Finally, your application uses the secret securely without exposing it in code. This keeps sensitive information safe and separate from your programs.

Practice

1. What is the main purpose of using Azure Key Vault to store secrets?

easy

A. To keep sensitive information safe and separate from application code

B. To speed up application performance by caching data

C. To store large files like videos and images

D. To create virtual machines automatically

Solution

1. Step 1: Understand what secrets are

   Secrets are sensitive data like passwords or keys that should be protected.

2. Step 2: Identify Azure Key Vault's role

   Azure Key Vault securely stores and manages these secrets separately from code.

3. Final Answer:

   To keep sensitive information safe and separate from application code -> Option A

4. Quick Check:

   Azure Key Vault = Secure secret storage [OK]

Hint: Secrets = sensitive info; Key Vault keeps them safe [OK]

Common Mistakes:

• Thinking Key Vault speeds up app performance
• Confusing secrets with large file storage
• Assuming Key Vault creates virtual machines

2. Which Azure CLI command correctly adds a secret named MySecret with value abc123 to a Key Vault named MyVault?

easy

A. az keyvault secret add --vault MyVault --secret-name MySecret --secret-value abc123

B. az keyvault secret set --vault-name MyVault --name MySecret --value abc123

C. az keyvault secret create --vault-name MyVault --secret MySecret --value abc123

D. az keyvault secret upload --vault MyVault --name MySecret --value abc123

Solution

1. Step 1: Recall the correct Azure CLI command for adding secrets

   The correct command is az keyvault secret set with parameters for vault name, secret name, and value.

2. Step 2: Match parameters with the command

   az keyvault secret set --vault-name MyVault --name MySecret --value abc123 uses the correct command and parameters: --vault-name, --name, and --value.

3. Final Answer:

   az keyvault secret set --vault-name MyVault --name MySecret --value abc123 -> Option B

4. Quick Check:

   Use az keyvault secret set to add secrets [OK]

Hint: Add secrets with 'az keyvault secret set' command [OK]

Common Mistakes:

• Using incorrect command verbs like add or create
• Wrong parameter names like --secret-name instead of --name
• Confusing upload with set command

3. Given this Azure CLI command:

az keyvault secret show --vault-name MyVault --name ApiKey

What will this command do?

medium

A. It retrieves the value of the secret named ApiKey from MyVault

B. It deletes the secret named ApiKey from MyVault

C. It lists all secrets stored in MyVault

D. It creates a new secret named ApiKey in MyVault

Solution

1. Step 1: Understand the command structure

   The command uses az keyvault secret show which is for retrieving a secret's value.

2. Step 2: Identify the parameters

   --vault-name MyVault specifies the vault, and --name ApiKey specifies the secret to retrieve.

3. Final Answer:

   It retrieves the value of the secret named ApiKey from MyVault -> Option A

4. Quick Check:

   secret show = retrieve secret [OK]

Hint: Use 'secret show' to get secret values [OK]

Common Mistakes:

• Confusing show with delete or create commands
• Thinking it lists all secrets
• Mixing up secret names and vault names

4. You run this command:

az keyvault secret set --vault-name MyVault --name Password

But it fails with an error. What is the most likely cause?

medium

A. The secret name Password is invalid

B. The vault name MyVault does not exist

C. You forgot to provide the secret value with --value parameter

D. You need to use 'secret create' instead of 'secret set'

Solution

1. Step 1: Check the command parameters

   The command is missing the --value parameter which is required to specify the secret's value.

2. Step 2: Consider other options

   While vault existence and secret name validity matter, the error is most commonly due to missing the secret value.

3. Final Answer:

   You forgot to provide the secret value with --value parameter -> Option C

4. Quick Check:

   Missing --value causes failure [OK]

Hint: Always include --value when setting a secret [OK]

Common Mistakes:

• Assuming 'secret create' is a valid command
• Ignoring missing required parameters
• Not verifying vault existence first

5. You want to securely store multiple environment variables as secrets in Azure Key Vault and access them in your app without exposing them in code. Which approach is best?

hard

A. Save the variables in a public GitHub repo and use environment variables locally

B. Store all variables in a single secret as a JSON string and parse it in your app

C. Hardcode the variables in your app and encrypt the app binary

D. Store each variable as a separate secret in Key Vault and configure your app to fetch them at runtime

Solution

1. Step 1: Understand secure secret storage best practices

   Storing each secret separately allows fine-grained control and easier management.

2. Step 2: Evaluate options for app access

   Fetching secrets at runtime keeps secrets out of code and source control, improving security.

3. Final Answer:

   Store each variable as a separate secret in Key Vault and configure your app to fetch them at runtime -> Option D

4. Quick Check:

   Separate secrets + runtime fetch = best practice [OK]

Hint: Use separate secrets and fetch at runtime for security [OK]

Common Mistakes:

• Putting all secrets in one JSON string secret
• Hardcoding secrets in app code
• Exposing secrets in public repositories