Custom SMT for Confluent Cloud Limitations and Support

This page describes the limitations and support for Custom SMTs. Be sure to review all the information in this page before proceeding with the Quick start.

Limitations

  • Custom SMTs can only be used with fully-managed Connectors.
  • Custom SMTs are scoped to a specific Environment and CSP (i.e. AWS).
  • Only available for clusters within Private Networking setups (Peering, Transit Gateway, Private Network Interface, Privatelink) on AWS.
  • Default limit for Custom SMTs per fully-managed connector is 3.
  • Default limit for uploaded Custom SMT artifact files is 5 per Confluent environment.
  • Default limit for Custom artifact file size is 100 MB.
  • Message size limit of ~2MB (4MB on the wire size).

Reach out to Confluent Support to request limit increase for any of the current limitations.

Important

Confluent regularly scans files uploaded through the Custom SMT product to detect if uploaded Custom SMT artifact files present a security risk to Confluent. If malicious activity is detected, Confluent may immediately delete the Custom SMT artifact file.

Shared Responsibility

Confluent supports the underlying Custom SMT infrastructure in Confluent Cloud only. It is your responsibility to troubleshoot Custom SMT issues for connectors you build or that were provided to you from others. The following provides additional details about shared support responsibilities.

Shared responsibilities matrix

Shared responsibilities matrix

  • Customer Managed: The customer is responsible for self-managing these services. Confluent does not provide any support for customer-managed services and features with Custom SMTs.
  • Confluent Managed: Confluent is responsible for managing these services and providing support.

Supported AWS regions

You can use Custom SMTs with fully-managed connectors in the following AWS regions supported by Confluent Cloud.

AWS regions

  • Asia Pacific:
    • ap-southeast-1 (Singapore)
    • ap-southeast-2 (Sydney)
    • ap-south-1 (Mumbai)
  • Canada:
    • ca-central-1 (Canada Central)
  • Europe:
    • eu-central-1 (Frankfurt)
    • eu-west-1 (Ireland)
    • eu-west-2 (London)
  • United States:
    • us-east-1 (N. Virginia)
    • us-east-2 (Ohio)
    • us-west-2 (Oregon)

Observability / Logs

You can view the Confluent Cloud Custom SMT events alongside fully-managed connector events in the Confluent Cloud Console. For more details on how to view these events, see View Connector Events for Confluent Cloud.