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K8s Secrets Store CSI Driver

Kubernetes Secrets Store Container Storage Interface (CSI) Driver

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Secrets Store CSI Driver for K8s secrets - Integrates secret stores with K8s via a Container Storage Interface (CSI) volume.

The Secrets Store CSI Driver secrets-store.csi.k8s.io allows K8s to mount multiple secrets, keys, and certs stored in enterprise-grade external secrets stores into their pods as a volume. Once the volume is attached, the data is mounted into the container's file system.

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Note

K8s Secrets Store CSI Provider supports Static Secrets, Rotated Secrets and Certificates

Akeyless provider for the Secrets Store CSI driver allows you to fetch existing secrets that are stored in Akeyless and use the Secrets Store CSI driver interface to mount them into K8s pods.

Similar to K8s secrets, upon pod start, the Secrets Store CSI driver communicates with the provider using gRPC to retrieve the secret content from the external Secrets Store specified in the SecretProviderClass custom resource.

Then the volume is mounted in the pod as tmpfs and the secret value is written to the volume.
Upon pod deletion, the corresponding volume is cleaned up and deleted.

Prerequisites

Install Akeyless CSI Provider

Using helm

helm repo add akeyless https://akeylesslabs.github.io/helm-charts
helm install akeyless-csi akeyless/akeyless-csi-provider

Or via local yaml file which located under deployment folder on this git.

kubectl apply -f deployment/akeyless-csi-provider.yaml

SecretProviderClass

The SecretProviderClass is a namespaced resource in Secrets Store CSI Provider that is used to provide configurations and provider-specific parameters to the CSI provider.

Supported Authentication Methods :

SecretProviderClass custom resource should state the akeylessAccessType- which can be one of the supported Authentication Methods : access_key, aws_iam, azure_ad, gcp, universal_identity.

While using k8s,azure_ad, or gcp , the following parameters should be provided accordingly:

akeylessK8sAuthConfigName,akeylessAzureObjectID or akeylessGCPAudience.

Example of a SecretProviderClass resource:

apiVersion: secrets-store.csi.x-k8s.io/v1
kind: SecretProviderClass
metadata:
  name: akeyless-test
spec:
  provider: akeyless
  parameters:
    akeylessGatewayURL: "https://api.akeyless.io"
    akeylessAccessID: "Access Id"
    akeylessAccessKey: "Access Key"
    akeylessAccessType: "access_key"
    objects:  |
      - secretPath: "/path/to/secret/foo"
        fileName: "foo"
      - secretPath: "/path/to/secret/bar"
        fileName: "bar"

apiVersion: secrets-store.csi.x-k8s.io/v1
kind: SecretProviderClass
metadata:
  name: akeyless-test
spec:
  provider: akeyless
  parameters:
    akeylessGatewayURL: "https://<Your GW URL>:8081"
    akeylessAccessID: "Access Id"
    akeylessAccessType: "k8s"
    akeylessK8sAuthConfigName: "k8s-conf"
    objects:  |
      - secretPath: "/path/to/secret/foo"
        fileName: "foo"
      - secretPath: "/path/to/secret/bar"
        fileName: "bar"

apiVersion: secrets-store.csi.x-k8s.io/v1
kind: SecretProviderClass
metadata:
  name: akeyless-test
spec:
  provider: akeyless
  parameters:
    akeylessGatewayURL: "https://api.akeyless.io"
    akeylessAccessID: "Access Id"
    akeylessAccessType: "aws_iam"
    objects:  |
      - secretPath: "/path/to/secret/foo"
        fileName: "foo"
      - secretPath: "/path/to/secret/bar"
        fileName: "bar"

apiVersion: secrets-store.csi.x-k8s.io/v1
kind: SecretProviderClass
metadata:
  name: akeyless-test
spec:
  provider: akeyless
  parameters:
    akeylessGatewayURL: "https://api.akeyless.io"
    akeylessAccessID: "Access Id"
    akeylessAzureObjectID: "<Azure ObjectId>" #When using workload identity and you wish to use the default credentials, leave this field empty
    akeylessAccessType: "azure_ad"
    objects:  |
      - secretPath: "/path/to/secret/foo"
        fileName: "foo"
      - secretPath: "/path/to/secret/bar"
        fileName: "bar"

apiVersion: secrets-store.csi.x-k8s.io/v1
kind: SecretProviderClass
metadata:
  name: akeyless-test
spec:
  provider: akeyless
  parameters:
    akeylessGatewayURL: "https://api.akeyless.io"
    akeylessAccessID: "<Access Id>"
    akeylessGCPAudience: "akeyless.io"
    akeylessAccessType: "gcp"
    objects:  |
      - secretPath: "/path/to/secret/foo"
        fileName: "foo"
      - secretPath: "/path/to/secret/bar"
        fileName: "bar"

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Warning

Using Access Key within YAML files is not secure. You can provide the AKEYLESS_ACCESS_KEY as an environment variable instead.

Reference the SecretProviderClass inside the pod deployment volumes when using the CSI driver:

apiVersion: v1
kind: Pod
metadata:
  name: test-csi
spec:
  containers:
  - image: alpine
    name: alpine
    command:
      - "sh"
      - "-c"
      - "echo going to sleep... && sleep 10000"
    volumeMounts:
    - name: secrets-store-inline
      mountPath: "/akeyless-secrets"
      readOnly: true
  volumes:
    - name: secrets-store-inline
      csi:
        driver: secrets-store.csi.k8s.io
        readOnly: true
        volumeAttributes:
          secretProviderClass: "akeyless-test"

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Warning

The SecretProviderClass needs to be created in the same namespace as the pod.

After the pod is created, the secret can be found inside the pod, under the mountPath - within the fileName

Updated about 2 months ago

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