Coordinated worker roles and meta-roles¶

Worker meta-roles and roles for Mimir, Loki, and Tempo in COS HA. See the coordinated workers explanation guide for an overview of the coordinator-worker pattern in COS.

Mimir¶

Meta-roles¶

Meta-role	Constituent roles
`read`	`querier`, `query-frontend`
`write`	`distributor`, `ingester`
`backend`	`alertmanager`, `compactor`, `overrides-exporter`, `query-scheduler`, `ruler`, `store-gateway`
`all`	`compactor`, `distributor`, `ingester`, `querier`, `query-frontend`, `ruler`, `store-gateway`

Roles¶

Role	Part of meta-role	Required	Recommended units
`compactor`	`backend`, `all`	yes	1
`distributor`	`write`, `all`	yes	1
`ingester`	`write`, `all`	yes	3
`querier`	`read`, `all`	yes	2
`query-frontend`	`read`, `all`	yes	1
`store-gateway`	`backend`, `all`	yes	1
`ruler`	`backend`, `all`	yes	1
`alertmanager`	`backend`	no	—
`overrides-exporter`	`backend`	no	—
`query-scheduler`	`backend`	no	—
`flusher`	—	no	—

Loki¶

Loki’s microservices mode uses three top-level roles (read, write, backend) as the primary unit of deployment. These roles are themselves the building blocks for the all meta-role.

Meta-roles¶

Meta-role	Constituent roles
`all`	`read`, `write`, `backend`

Roles¶

Role	Part of meta-role	Required	Recommended units
`read`	`all`	yes	3
`write`	`all`	yes	3
`backend`	`all`	yes	3

Tempo¶

Meta-roles¶

Meta-role	Constituent roles
`all`	`querier`, `query-frontend`, `ingester`, `distributor`, `compactor`, `metrics-generator`

Roles¶

Role	Part of meta-role	Required	Recommended units
`querier`	`all`	yes	1
`query-frontend`	`all`	yes	1
`ingester`	`all`	yes	3
`distributor`	`all`	yes	1
`compactor`	`all`	yes	1
`metrics-generator`	`all`	no	1

References¶