Azure Key Vault Plugin

This plugin enables Jenkins to fetch secrets from Azure Keyvault and inject them directly into build jobs. It works similarly to the Credential Binding Plugin and borrows much from the Hashicorp Vault Plugin. The plugin acts as an Azure Active Directory Application and must be configured with a valid credential. Additional details here.

System Configuration

Via UI

In the Jenkins Configure System page, configure the following two options in the Azure Key Vault Plugin section

• Key Vault URL - The url where your keyvault resides (e.g. https://myvault.vault.azure.net/)
• Credential ID - The ID associated with a secret in the Jenkins secret store. Supported types are: Microsoft Azure Service Principal and Managed Identities for Azure Resources.

Via configuration-as-code

This plugin supports the configuration as code plugin:

Example yaml:

credentials:
  system:
    domainCredentials:
      - credentials:
        - azure:
            azureEnvironmentName: "Azure"
            clientId: "d63d9de6-5f7a-48c1-ac1d-e90d4f5e5dcc"
            clientSecret: "${CLIENT_SECRET}"
            description: "An azure service principal"
            id: "service-principal"
            scope: SYSTEM
            subscriptionId: "d63d9de6-5f7a-48c1-ac1d-e90d4f5e5dcc"
            tenant: "d63d9de6-5f7a-48c1-ac1d-e90d4f5e5dcc"

unclassified:
  azureKeyVault:
    keyVaultURL: https://not-a-real-vault.vault.azure.net
    credentialID: service-principal

Via system properties

URL:

-Djenkins.azure-keyvault.url=https://my.vault.azure.net

User Assigned Managed Identity:

-Djenkins.azure-keyvault.uami.enabled=true

Service principal:

-Djenkins.azure-keyvault.sp.client_id=...
-Djenkins.azure-keyvault.sp.client_secret=...
-Djenkins.azure-keyvault.sp.subscription_id=...
-Djenkins.azure-keyvault.sp.tenant_id=...

Via environment variables

URL:

AZURE_KEYVAULT_URL=https://my.vault.azure.net

User Assigned Managed Identity:

AZURE_KEYVAULT_UAMI_ENABLED=true

Service principal:

AZURE_KEYVAULT_SP_CLIENT_ID=...
AZURE_KEYVAULT_SP_CLIENT_SECRET=...
AZURE_KEYVAULT_SP_SUBSCRIPTION_ID=...
AZURE_KEYVAULT_SP_SUBSCRIPTION_ID=...

Building the Plugin

• Run mvn package, an .hpi file will be generated in the target folder.

Plugin Usage

Usage in Jenkinsfile

Note that the example echos below will only show *****'s as the plugin redacts secrets found in the build log inside the withAzureKeyvault build wrapper.

Scripted

Snippet generator is fully supported for generating the possible values (along with inline help): Go to any pipeline job and click Pipeline Syntax

Or visit the URL: /job/<job-name>/pipeline-syntax/

Simple version:

node {
    def secrets = [
        [ secretType: 'Certificate', name: 'MyCert00', envVariable: 'CERTIFICATE' ],
        [ secretType: 'Secret', name: 'MySecret00', envVariable: 'SECRET' ],
        [ secretType: 'Secret', name: 'MySecret00', version: '342432lkjhdasjld', envVariable: 'SECRET' ]
    ]

    withAzureKeyvault(secrets) {
        sh 'echo $CERTIFICATE'
        sh 'echo $SECRET'
    }
}

With overrides:

static LinkedHashMap<String, Object> secret(String secretName, String envVar) {
  [ 
    secretType: 'Secret',
    name: secretName,
    version: '342432lkjhdasjld',
    envVariable: envVar
  ]
}

node {
    def secrets = [
        secret('my-secret', 'MY_SECRET')
    ]

    withAzureKeyvault(
            azureKeyVaultSecrets: secrets, 
            keyVaultURLOverride: 'https://mykeyvault.vault.azure.net',
            credentialIDOverride: 'service-principal'
    ) {
        sh 'echo $MY_SECRET'
     }
}

Declarative

Snippet generator is fully supported for generating the possible values (along with inline help): Go to any pipeline job and click Pipeline Syntax -> Declarative Directive Generator

Or visit the URL: /job/<job-name>/directive-generator/

Simple:

pipeline {
    agent any
    stages {
        stage('Build') {
            options {
              azureKeyVault([[envVariable: 'MY_SECRET', name: 'my-secret', secretType: 'Secret']])
            }
            steps {
                sh "echo $SECRET"
            }
        }
    }
}

With overrides:

pipeline {
    agent any
    stages {
        stage('Build') {
            options {
              azureKeyVault(
                credentialID: 'my-sp', 
                keyVaultURL: 'https://my.vault.azure.net', 
                secrets: [
                    [envVariable: 'MY_SECRET', name: 'my-secret', secretType: 'Secret']
                ]
              )
            }
            steps {
                sh "echo $SECRET"
            }
        }
    }
}

Certificate:

pipeline {
    agent any
    stages {
        stage('Build') {
            options {
              azureKeyVault([[envVariable: 'CERT_LOCATION', name: 'my-cert-name', secretType: 'Certificate']])
            }
            steps {
                sh "openssl pkcs12 -in $CERT_LOCATION  -nodes -password 'pass:' -out keyvault.pem"
            }
        }
    }
}

The shell command above will convert the PFX file to a pem key file (also containing the cert), note that Azure Key Vault removes the password on the pfx when you import it, if you're importing it back into Azure somewhere else you may need to convert it to pem and convert back to a pfx with a password.

Azure Key Vault Credentials Provider (Beta)

This plugin also enables the retrieval of Secrets directly from Azure Key Vault. After the configuration is set up, secrets from the key vault can be viewed in the credentials page like this:

Note These credentials are read-only and metadata caching(5 minutes) which means newly created secrets may not be here immediately.

Use these credentials just as other normal credentials in Jenkins.

Declarative Pipeline:

pipeline {
    agent any
    environment {
        GITHUB_API_TOKEN = credentials('github-api-token')
    }
    stages {
        stage('Foo') {
            steps {
                echo '$GITHUB_API_TOKEN'
            }
        }
    }
}

Scripted Pipeline:

node {
    withCredentials([string(credentialsId: 'github-api-token', variable: 'GITHUB_API_TOKEN')]) {
        echo '$GITHUB_API_TOKEN'
    }
}

SecretSource

The plugin allows JCasC to interpolate string secrets from Azure KeyVault.

Example

az cli:

az keyvault secret set --vault-name my-vault --name my-password --value password

JCasC:

jenkins:
  securityRealm:
    local:
      allowsSignup: false
      users:
      - id: "foo"
        password: "${my-password}"