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Oracle Cloud Infrastructure (OCI) Vault

Securely load database credentials from OCI Vault.

Each database in the config file may be configured to use OCI Vault. To load the database username and/or password from OCI Vault, set the vault.oci property to contain the OCI Vault OCID, and secret names for the database username/password:

databases:
  mydb:
    vault:
      oci:
        id: <VAULT OCID>
        usernameSecret: <Secret containing DB username>
        passwordSecret: <Secret containing DB password>

Config file​

Use config_file when the exporter should authenticate with the OCI Go SDK default configuration provider. This reads the local OCI config file, such as $HOME/.oci/config, unless the SDK is configured otherwise. If auth is omitted, config_file is used for backward compatibility.

Configuration in exporter​

databases:
  mydb:
    vault:
      oci:
        id: <VAULT OCID>
        auth: config_file
        usernameSecret: <Secret containing DB username>
        passwordSecret: <Secret containing DB password>

Sample policy​

Allow group metrics-exporter-users to read secret-bundles in compartment observability

Instance principal​

Use instance_principal when the exporter runs on an OCI Compute instance and should authenticate as the instance.

Configuration in exporter​

databases:
  mydb:
    vault:
      oci:
        id: <VAULT OCID>
        auth: instance_principal
        usernameSecret: <Secret containing DB username>
        passwordSecret: <Secret containing DB password>

Sample policy​

Allow dynamic-group metrics-exporter-instances to read secret-bundles in compartment observability

Resource principal​

Use resource_principal when the exporter runs in an OCI service that exposes resource principal credentials.

Configuration in exporter​

databases:
  mydb:
    vault:
      oci:
        id: <VAULT OCID>
        auth: resource_principal
        usernameSecret: <Secret containing DB username>
        passwordSecret: <Secret containing DB password>

Sample policy​

Allow dynamic-group metrics-exporter-resources to read secret-bundles in compartment observability

Workload identity​

Use workload_identity when the exporter runs in OKE with workload identity configured.

Configuration in exporter​

databases:
  mydb:
    vault:
      oci:
        id: <VAULT OCID>
        auth: workload_identity
        usernameSecret: <Secret containing DB username>
        passwordSecret: <Secret containing DB password>

When auth: workload_identity is selected, the exporter uses the OCI Go SDK workload identity provider. The exporter does not set OCI SDK environment variables at runtime, so configure the exporter process with:

  • OCI_RESOURCE_PRINCIPAL_VERSION: set to 2.2
  • OCI_RESOURCE_PRINCIPAL_REGION: set to the OCI region that contains the Vault, such as us-ashburn-1

For example, in a Kubernetes deployment:

env:
  - name: OCI_RESOURCE_PRINCIPAL_VERSION
    value: "2.2"
  - name: OCI_RESOURCE_PRINCIPAL_REGION
    value: us-ashburn-1

In OKE, the OCI SDK also uses the pod service account token, service account CA certificate, and Kubernetes service host provided by the runtime:

  • KUBERNETES_SERVICE_HOST
  • /var/run/secrets/kubernetes.io/serviceaccount/token
  • /var/run/secrets/kubernetes.io/serviceaccount/ca.crt

If the service account CA certificate is mounted at a custom path, set OCI_KUBERNETES_SERVICE_ACCOUNT_CERT_PATH to that path.

Sample policy​

Allow any-user to read secret-bundles in compartment observability where all {
  request.principal.type = 'workload',
  request.principal.namespace = 'monitoring',
  request.principal.service_account = 'metrics-exporter',
  request.principal.cluster_id = 'ocid1.cluster.oc1.iad.example'
}

Policy conditions​

The exporter reads secret bundle values from OCI Vault, so the principal used by the selected authentication mode needs permission to read secret-bundles in the compartment that contains the secrets.

To limit access to a specific vault or secret name, add a policy condition:

Allow dynamic-group metrics-exporter-instances to read secret-bundles in compartment observability
  where target.vault.id = 'ocid1.vault.oc1..example'

Allow dynamic-group metrics-exporter-instances to read secret-bundles in compartment observability
  where target.secret.name = 'metrics-exporter-db-password'

Replace the compartment, group, dynamic group, namespace, service account, cluster OCID, vault OCID, and secret name with values from your environment.