Override config for all the tenants

[KrishnaJyothika]

What is the bug?

Hi Team,

I am currently facing an issue while trying to override a configuration for all tenants. While overriding the configuration for a single tenant works as expected, doing the same for all tenants does not seem to work. Below is the configuration I am using:

runtime_config.yaml: |
overrides:
"*":
ingestion_rate: 900000

It appears that the wildcard "*" is being considered as an actual tenant name instead of applying to all tenants.

/overrides-exporter/metrics

/overrides-exporter/runtime_config?mode=diff

Please let me know if there are any modifications required or if there's a different approach we should consider.

How to reproduce it?

1. Mimir Version: 2.14.2
2. Data Ingestion: Data is coming to Mimir with multiple tenants.
3. Runtime Config: I am trying to create a runtime config to override any parameter for all the tenants.
4. Verification: Verify using the overrides API endpoints (/overrides-exporter/metrics and /overrides-exporter/runtime_config?mode=diff).

What did you think would happen?

It appears that the wildcard "*" is being considered as an actual tenant name instead of applying to all tenants.

What was your environment?

Kubernetes

Any additional context to share?

No response

[andyasp]

The way to set defaults for all tenants is through the limits section of the configuration (not the runtime configuration). It is described in the documentation here: https://grafana.com/docs/mimir/latest/configure/configuration-parameters/#limits

As an example, if you are using helm, what you are attempting to configure would look something like:

mimir:
  structuredConfig:
    limits:
      ingestion_rate: 900000

As a reference the section I am referring to in the base values file is here:

mimir/operations/helm/charts/mimir-distributed/values.yaml

Line 345 in 6e1e4bd

limits:

If you are deploying another way hopefully that gives you enough reference to make it work for you.