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› Grafana Mimir operator and user guide › Configure Grafana Mimir › About Grafana Mimir tenant IDs

About Grafana Mimir tenant IDs

Within a Grafana Mimir cluster, the tenant ID is the unique identifier of a tenant. For information about how Grafana Mimir components use tenant IDs, refer to Authentication and authorization.

Restrictions

Tenant IDs must be less-than or equal-to 150 bytes or characters in length and can only include the following supported characters:

  • Alphanumeric characters
    • 0-9
    • a-z
    • A-Z
  • Special characters
    • Exclamation point (!)
    • Hyphen (-)
    • Underscore (_)
    • Single period (.)
    • Asterisk (*)
    • Single quote (')
    • Open parenthesis (()
    • Close parenthesis ())

Note: For security reasons, . and .. are not valid tenant IDs. Note: The tenant ID __mimir_cluster is unsupported because its name is used internally by Mimir.

All other characters, including slashes and whitespace, are not supported.