Azure Key Vault task

Azure Pipelines

Overview

Use this task to download secrets such as authentication keys, storage account keys, data encryption keys, .PFX files, and passwords from an Azure Key Vault instance. The task can be used to fetch the latest values of all or a subset of secrets from the vault, and set them as variables that can be used in subsequent tasks of a pipeline. The task is Node-based, and works with agents on Linux, macOS, and Windows.

Prerequisites

The task has the following Prerequisites:

You can create a key vault:

Add secrets to a key vault:

  • By using the PowerShell cmdlet Set-AzureKeyVaultSecret. If the secret does not exist, this cmdlet creates it. If the secret already exists, this cmdlet creates a new version of that secret.

  • By using the Azure CLI. To add a secret to a key vault, for example a secret named SQLPassword with the value Pa$$w0rd, type:

    az keyvault secret set --vault-name 'ContosoKeyVault' --name 'SQLPassword' --value 'Pa$$w0rd'
    

When you want to access secrets:

  • Ensure the Azure service connection has at least Get and List permissions on the vault. You can set these permissions in the Azure portal:

    • Open the Settings blade for the vault, choose Access policies, then Add new.

    • In the Add access policy blade, choose Select principal and select the service principal for your client account.

    • In the Add access policy blade, choose Secret permissions and ensure that Get and List are checked (ticked).

    • Choose OK to save the changes.

YAML snippet

# Azure Key Vault
# Download Azure Key Vault secrets
- task: AzureKeyVault@1
  inputs:
    azureSubscription: 
    keyVaultName: 
    secretsFilter: '*'
    runAsPreJob: false # Azure DevOps Services only

Arguments

Parameter Description
ConnectedServiceNameAzure Subscription (Required) Select the service connection for the Azure subscription containing the Azure Key Vault instance, or create a new connection. Learn more
KeyVaultName
Key Vault
(Required) Select the name of the Azure Key Vault from which the secrets will be downloaded.
SecretsFilter
Secrets filter
(Required) A comma-separated list of secret names to be downloaded.
Default value: *
RunAsPreJob
Make secrets available to whole job
(Required) Run the task before job execution begins. Exposes secrets to all tasks in the job, not just tasks that follow this one.
Default value: false
Parameter Description
ConnectedServiceNameAzure Subscription (Required) Select the service connection for the Azure subscription containing the Azure Key Vault instance, or create a new connection. Learn more
KeyVaultName
Key Vault
(Required) Select the name of the Azure Key Vault from which the secrets will be downloaded.
SecretsFilter
Secrets filter
(Required) A comma-separated list of secret names to be downloaded.
Default value: *

Note

Values are retrieved as strings. For example, if there is a secret named connectionString, a task variable connectionString is created with the latest value of the respective secret fetched from Azure key vault. This variable is then available in subsequent tasks.

If the value fetched from the vault is a certificate (for example, a PFX file), the task variable will contain the contents of the PFX in string format. You can use the following PowerShell code to retrieve the PFX file from the task variable:

$kvSecretBytes = [System.Convert]::FromBase64String($(PfxSecret))
$certCollection = New-Object System.Security.Cryptography.X509Certificates.X509Certificate2Collection
$certCollection.Import($kvSecretBytes,$null,[System.Security.Cryptography.X509Certificates.X509KeyStorageFlags]::Exportable)

If the certificate file will be stored locally on the machine, it is good practice to encrypt it with a password:

 #Get the file created
$password = 'your password'
$protectedCertificateBytes = $certCollection.Export([System.Security.Cryptography.X509Certificates.X509ContentType]::Pkcs12, $password)
$pfxPath = [Environment]::GetFolderPath("Desktop") + "\MyCert.pfx"
[System.IO.File]::WriteAllBytes($pfxPath, $protectedCertificateBytes)

For more details, see Get started with Azure Key Vault certificates.

Contact Information

Contact RM_Customer_Queries@microsoft.com if you discover issues using the task, to share feedback about the task, or to suggest new features that you would like to see.

Open source

This task is open source on GitHub. Feedback and contributions are welcome.

FAQ

Do I need an agent?

You need at least one agent to run your build or release.

I'm having problems. How can I troubleshoot them?

See Troubleshoot Build and Release.

I can't select a default agent pool and I can't queue my build or release. How do I fix this?

See Agent pools.