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Stash supports AWS S3 service or S3 compatible services like Minio servers, Rook Object store as a backend. This tutorial will show you how to configure Restic and storage Secret for AWS S3 backend.

Create Storage Secret

To configure storage secret for this backend, following secret keys are needed:

RESTIC_PASSWORDRequired. Password used to encrypt snapshots by restic
AWS_ACCESS_KEY_IDRequired. AWS / Minio / DigitalOcean Spaces access key ID
AWS_SECRET_ACCESS_KEYRequired. AWS / Minio / DigitalOcean Spaces secret access key
CA_CERT_DATAoptional. CA certificate used by storage backend. This can be used to pass a self-signed ca used with Minio server.

Create storage secret as below,

$ echo -n 'changeit' > RESTIC_PASSWORD
$ echo -n '<your-aws-access-key-id-here>' > AWS_ACCESS_KEY_ID
$ echo -n '<your-aws-secret-access-key-here>' > AWS_SECRET_ACCESS_KEY
$ kubectl create secret generic s3-secret \
    --from-file=./RESTIC_PASSWORD \
    --from-file=./AWS_ACCESS_KEY_ID \
secret "s3-secret" created

Verify that the secret has been created with respective keys,

$ kubectl get secret s3-secret -o yaml

apiVersion: v1
kind: Secret
  creationTimestamp: 2017-06-28T12:22:33Z
  name: s3-secret
  namespace: default
  resourceVersion: "2511"
  selfLink: /api/v1/namespaces/default/secrets/s3-secret
  uid: 766d78bf-5bfc-11e7-bb52-08002711f4aa
type: Opaque

Configure Restic

Now, you have to configure Restic crd to use AWS S3 backend. You have to provide previously created storage secret in spec.backend.storageSecretName field.

Following parameters are available for S3 backend.

s3.endpointRequired. For S3, use If your bucket is in a different location, S3 server ( will redirect restic to the correct endpoint. For DigitalOCean, use etc. depending on your bucket region. For an S3-compatible server that is not Amazon (like Minio), or is only available via HTTP, you can specify the endpoint like this: http://server:port.
s3.bucketRequired. Name of Bucket. If the bucket does not exist yet it will be created in the default location (us-east-1 for S3). It is not possible at the moment to have restic create a new bucket in a different location, so you need to create it using a different program.
s3.prefixOptional. Path prefix into bucket where repository will be created.

Below, the YAML for Restic crd configured to use AWS S3 backend.

kind: Restic
  name: s3-restic
  namespace: default
      app: s3-restic
  - path: /source/data
    retentionPolicyName: 'keep-last-5'
      endpoint: ''
      bucket: stash-qa
      prefix: demo
    storageSecretName: s3-secret
  schedule: '@every 1m'
  - mountPath: /source/data
    name: source-data
  - name: 'keep-last-5'
    keepLast: 5
    prune: true

Now, create the Restic we have configured above for s3 backend,

$ kubectl apply -f
restic "s3-restic" created

Next Steps

  • Learn how to use Stash in Amazon Elastic Container Service for Kubernetes (EKS) from here.
  • Learn how to use Stash with S3 compatible Mino Storage Server from here.
  • Learn how to use Stash with S3 comptatibe Rook Storage Service from here.
  • Learn how to use Stash to backup a Kubernetes deployment from here.
  • Learn how to recover from backed up snapshot from here.