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Custom Hostname Discovery Slack

This document explains how to control the names used for host discovery. This allows us to discover hosts using external name services, which is useful for serving with trusted certificates.

Getting Started

If MinIO Tenant is named tenant1, then the four servers will be called myminio-pool-0-0, myminio-pool-0-1, myminio-pool-0-2, and myminio-pool-0-3. If all of your hosts are available at the domain example.com then you can use the --hosts-template flag in MinIO Operator Deployment yaml to update discovery. This will generate the discovery string myminio-pool-0-{0...3}.example.com.

  containers:
    - command:
        - /operator
        - --hosts-template
        - '{{.StatefulSet}}-{{.Ellipsis}}.example.com'

The following fields can be configured:

Field Description
StatefulSet The name of the tenant StatefulSet (e.g. minio).
CIService The name of the service provided in spec.serviceName.
HLService The name of the headless service that is generated (e.g. minio-hl-service)
Ellipsis {0...N-1} the per-pool host numbers.
Domain The cluster domain, either cluster.local or the contents of the CLUSTER_DOMAIN environment variable.