cortex-tenant
A Prometheus/Loki remote write proxy that adds Cortex/Mimir/Loki tenant IDs to metrics and logs based on labels.
What is cortex-tenant?
cortex-tenant is a proxy service that sits between Prometheus/Loki and Cortex/Mimir/Loki backends, enabling multi-tenant writes from a single data source. It solves the limitation where Prometheus cannot natively send different tenant IDs for different metric jobs, allowing a single Prometheus instance to write to multiple isolated tenants by extracting tenant IDs from metric or log stream labels.
DevOps engineers and SREs managing multi-tenant Cortex, Mimir, or Loki deployments who need to route metrics and logs from a single Prometheus or Loki instance to multiple isolated tenants. It is also for teams with centralized monitoring infrastructure requiring tenant isolation without running multiple data source instances.
Developers choose cortex-tenant because it provides a lightweight, stable bridge that solves a specific infrastructure problem without modifying upstream data sources or storage backends. Its unique selling point is the ability to extract tenant IDs from configurable labels and perform parallel per-tenant writes, adhering to the Unix philosophy of doing one thing well.
Overview
Prometheus remote write proxy that adds Cortex/Mimir tenant ID based on metric labels
Use Cases
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