loki/docs/sources/configuration/examples/13-COS-Trusted-Profile-Example.yaml

# This partial configuration uses IBM Cloud Object Storage (COS) for chunk storage. 
# A trusted profile will be used for authenticating with COS. We can either pass
# the trusted profile name or trusted profile ID along with the compute resource token file.
# If we pass both trusted profile name and trusted profile ID it should be of 
# the same trusted profile.
# In order to use trusted profile authentication we need to follow an additional step to create a trusted profile.
# For more details about creating a trusted profile, see https://cloud.ibm.com/docs/account?topic=account-create-trusted-profile&interface=ui.

schema_config:
  configs:
    - from: 2020-10-01
      index:
        period: 24h
        prefix: loki_index_
      object_store: "cos"
      schema: v11
      store: "boltdb-shipper"

storage_config:
  cos:
    bucketnames: <bucket1, bucket2>
    endpoint: <endpoint>
    region: <region>
    auth_endpoint: <iam_endpoint_for_authentication>
    cr_token_file_path: <path_to_compute_resource_token>
    trusted_profile_name: <name_of_the_trusted_profile> # You can also use trusted_profile_id instead of trusted_profile_name