When readying a Workflow deployment for production workloads, there are some additional recommendations.
Workflow makes use of Minio to provide storage for the Registry, Database, and Logger components. Minio is provided out of the box as a central storage compartment, but it is not resilient to cluster outages. If Minio is shut down, all data is lost.
In production, persistent storage can be achieved by running an external object store. For users on AWS, GCE/GKE or Azure, the convenience of Amazon S3, Google GCS or Microsoft Azure Storage makes the prospect of running a Minio-less Workflow cluster quite reasonable. For users who have restriction on using external object storage using swift object storage can be an option.
Running a Workflow cluster without Minio provides several advantages:
See Configuring Object Storage for details on removing this operational complexity.
There are some additional security-related considerations when running Workflow in production, and users can consider enabling a firewall on the CoreOS hosts as well as the router component.
See Security Considerations for details.
Changing the registration process is highly recommended in production. By default, registrations for a new cluster are open to anyone with the proper URL. Once the admin user has registered with a new cluster, it is recommended to either turn off registrations or enable the admin-only registration feature.
Please see the following documentation: Customizing Controller
Using TLS to encrypt traffic (including Workflow client traffic, such as login credentials) is crucial. See Platform SSL for the platform.