Multi-tenant support for metrics-generator

Multi-tenancy is supported in the metrics-generator through the use of environment variables and per-tenant overrides. This is useful when you want to propagate the multi-tenancy to the metrics backend, keeping the data separated and secure.

Requirements

GET version 2.4.0 or later

Usage

To use this feature, you need to define the remote_write_headers override for each tenant in your configuration. You can also use environment variables in your configuration file, which will be expanded at runtime. To make use of environment variables, you need to pass the --config.expand-env flag to GET.

Example:

overrides:
  team-traces-a:
    metrics_generator:
      processors: [ 'span-metrics' ]
      remote_write_headers:
        Authorization: ${PROM_A_BASIC_AUTH}
  team-traces-b:
    metrics_generator:
      processors: [ 'span-metrics', 'service-graphs' ]
      remote_write_headers:
        Authorization: ${PROM_B_BEARER_AUTH}

export PROM_A_BASIC_AUTH="Basic $(echo "team-a:$(cat /token-prometheus-a)"|base64|tr -d '[:space:]')"
export PROM_B_BEARER_AUTH="Bearer $(cat /token-prometheus-b)"

In this example, PROM_A_BASIC_AUTH and PROM_B_BEARER_AUTH are environment variables that contain the respective tenants’ authorization tokens.

The remote_write_headers override specifies the Authorization header for each tenant.

The Authorization header authenticates the remote-write request to the Prometheus remote-write endpoint.