URL

https://docs.openshift.com/container-platform/4.14/logging/log_storage/installing-log-storage.html

https://docs.openshift.com/container-platform/4.14/logging/log_storage/cluster-logging-loki.html#logging-loki-retention_cluster-logging-loki

Description

Having the same value of `spec.storage.schema.version` and `spec.storage.schema.effectiveDate` are important when Loki is present as documented in https://grafana.com/docs/loki/latest/operations/storage/schema/.

A change in the schema means to don't be able to see the old streams as documented in the upstream documentation because it's changed where the streams are written and read.

Change proposed

Change all the Loki examples for being consistent for having the same value of `spec.storage.schema.version` and `spec.storage.schema.from`, currently, at least, it's observed two different:

 spec:
  size: 1x.small 
  storage:
    schemas:
    - version: v12   <------- this version
      effectiveDate: '2022-06-01' <--- <--- this time is the field from in Loki that could be adjusted to something different

and

   storage:
    schemas: 
    - effectiveDate: "2020-10-11" <--- this time is the field from in Loki that could be adjusted to something different
      version: v11 <--- this version

Then, the current `version` used should be the newest: v12 and it should be used the same value across of all the examples. In the future, this could change to a new schema version.

The `effectiveDate` and `version` should be explained the meaning and importance of it as per https://grafana.com/docs/loki/latest/operations/storage/schema/.