Connect Your OpenSearch Cluster

You can store the files in your AWS OpenSearch cluster and connect deepset Cloud to it. This way, you control where your files are stored but you can still use them in your search app.

About This Task

Currently, we support connecting Amazon Web Services OpenSearch clusters in the eu-central-1 region to deepset Cloud.

When you connect deepset Cloud to your OpenSearch cluster, here's how it works: First, you upload your data to deepset Cloud. Then, deepset Cloud takes care of seamlessly transferring your data to the OpenSearch cluster. Although you can still view the files in deepset Cloud, they're actually located in your OpenSearch cluster.

You can use one or two AWS clusters for this. We recommend you use two OpenSearch clusters: one for the workspace files and one for serving the pipelines. This way, you can save money, as the workspace cluster doesn't need that many resources.

An illustration showing how data flows: it starts with the user icon, from there there's an arrow pointing towards the deepset Cloud logo. Over the arrow are icons representing files. From the deepset Cloud logo, there are two arrows, one pointing towards the pipeline cluster representation, with a search icon above it, and the other pointing towards the workspace cluster representation, with file icons above it.

The workspace cluster is where the files are stored as raw text. It's not used for search, and it doesn't store the vector representations of the files. For this cluster, you need a basic setup and less memory than for the pipeline cluster.

The pipeline cluster is the cluster where vector representations of files are stored and where the search happens. This cluster needs more memory than the workspace cluster. When you allocate memory to it, also consider whether you're planning to run a vector-based or keyword-based search on the files stored in this cluster. Vector-based search needs more memory than keyword-based one.

You can connect deepset Cloud to your Amazon OpenSearch Services cluster through API. There are four steps to do that:

  1. Authorize the deepset Cloud AWS account to connect to your OpenSearch cluster.
  2. Send an API call to create the OpenSearch credentials for the deepset Cloud workspace.
  3. Send an API call to create the OpenSearch credentials for your pipelines.
  4. Send an API call to create a deepset Cloud workspace that you want to connect with your OpenSearch cluster. The pipelines in this workspace will run on your OpenSearch cluster.


Security First

You can't connect an OpenSearch cluster to an existing workspace. This is because we want your files to be secure. When you create a dedicated workspace connected to your private cloud, you can be certain all your files are stored in your private cloud, not in deepset Cloud. This wouldn't be the case if you connected your private cloud to an existing workspace.


  • You must have your Amazon OpenSearch Services clusters ready. We recommend using one cluster for the workspace and another one for your pipelines.
    • The cluster for your workspace is only used to index the files. It doesn't store any embeddings, so you don't need to allocate too much memory to it.
    • The cluster for your pipelines handles the vector representations of the files, so make sure you allocate sufficient memory to it.
    • Both clusters must be in the eu-central-1 region in AWS. If you need support for another region, contact your deepset Cloud representative.
  • Have the arn for your workspace and pipeline clusters ready. You'll add it to the request to create the credentials.
Obtaining the ARN for your clusters
  1. Log in to your AWS account and open Amazon OpenSearch Service.
  2. Select the cluster whose ARN you want to check.
    The cluster details page opens, and in the General information section, you can see the domain ARN for the cluster.
Cluster general information screen with the ARN highlighted

Connect Your Cluster to deepset Cloud

  1. Authorize deepset Cloud to use your OpenSearch clusters:
    1. Log in to your AWS account and open Amazon OpenSearch Service.
    2. On the dashboard, select the cluster you want to use for the workspace. (This is the cluster that is used to store the list of files only.)
    3. On the cluster details page, go to VPC endpoints.
      The cluster details page with the VPC endpoints option highlighteddp
    4. In the Authorized principals section, click Authorize principal and type in the deepset Cloud AWS account number: 364870968120.
    5. Click Authorize.
    6. Repeat steps 1i to 1v for the cluster you want to use for your pipelines. (This will be the cluster storing the embeddings, so it needs more memory allocated.)
  2. Create the credentials for your workspace cluster using the Add Opensearch Credentials [private] endpoint. The port number is always 443.
    Here's a sample request you can use as a starting point:
    curl --request POST \
         --url \
         --header 'accept: application/json' \
         --header 'content-type: application/json' \
         --data '
      "port": 443,
      "password": "<OpenSearch user password>",
      "aws_domain_arn": "<cluster_arn>",
      "username": "<OpenSearch username>",
    Here's a step-by-step walkthrough of the code with explanations:
  1. Wait until you get the response. This may take a couple of minutes as AWS takes some time to create the connection. The response contains the credentials ID for the cluster. You'll need them to create the workspace in the last step.
  2. Repeat step 2 for the pipeline cluster. Again, wait for the response and make sure you save the credentials ID from it.



    You can also use the List Available Opensearch Credentials endpoint to get a list of all the credentials created for your deepset Cloud organization.

  3. Create the workspace that you want to connect to your clusters. Use the Create Workspace endpoint. Make sure you provide the workspace cluster and the pipeline cluster credentials IDs you obtained from responses in steps 2 and 3.
    Here's the code you can use as a starting point for this request:
    curl --request POST \
         --url \
         --header 'accept: application/json' \
         --header 'content-type: application/json' \
         --data '
      "document_store_credentials": {
        "pipeline_document_store_credentials_id": "<pipeline_cluster_credentials_id>",
        "workspace_document_store_credentials_id": "<workspace_cluster_credentials_id>"
      "name": "<workspace_name>"

Here's the code explained step-by-step:

What To Do Next

Now, the pipelines you create and deploy in the newly created workspace will use the files stored in your OpenSearch cluster.

Updating Credentials

If your credentials to any of the clusters connected to deepset Cloud change, you need to:

  1. Delete the workspace that uses the credentials. (You can also do this from deepset Cloud interface.)
  2. Delete the credentials using the Delete Custom OpenSearch Cluster [private].
  3. Add the new credentials.
  4. Create a new workspace. You can then copy your pipelines over to this workspace.

Deleting Credentials

To delete the credentials used by a cluster, you must first delete the workspace that uses them and then delete the credentials. If you delete the credentials without deleting the workspace, the workspace becomes unusable anyway.


deepset Cloud doesn't create any backups for the data of your pipelines to prevent the data from spreading into deepset's storage. We highly recommend you configure automated snapshots for your OpenSearch indexes, as well as create runbooks and regularly practice index recovery.