Important: This documentation is about an older version. It's relevant only to the release noted, many of the features and functions have been updated or replaced. Please view the current version.

Grafana Mimir Operator and user guide Deploy on Kubernetes Deploy with Jsonnet and Tanka Migrate query-scheduler to ring-based service discovery

Migrate query-scheduler from DNS-based to ring-based service discovery

The query-scheduler supports two service discovery mechanisms:

• DNS-based service discovery
• Ring-based service discovery

To migrate the query-scheduler from DNS-based to ring-based service discovery when your Mimir cluster is deployed using Jsonnet:

1. Configure the query-scheduler instances to join a ring, but keep the querier and query-frontend instances discovering query-schedulers via DNS:

   {
     _config+:: {
       query_scheduler_service_discovery_mode: 'ring',
       query_scheduler_service_discovery_ring_read_path_enabled: false,
     }
   }
   

2. Wait until query-scheduler changes have been applied.
3. Open the query-scheduler ring status page and ensure all query-scheduler instances are registered to the ring.
4. Configure query-frontend and querier instances to discover query-schedulers via the ring:

   {
     _config+:: {
       query_scheduler_service_discovery_mode: 'ring',
       query_scheduler_service_discovery_ring_read_path_enabled: true,
     }
   }