Baixar o agent Grafana https://github.com/grafana/agent/releases e seguir as instruções de instalação para Windows ou Linux, dependendo do sistema operacional
Documentações referência:
Grafana: https://grafana.com/docs/grafana/latest/
Mimir: https://grafana.com/docs/mimir/latest/
Loki: https://grafana.com/docs/loki/latest/
Promtail: https://grafana.com/docs/loki/latest/clients/promtail/
Grafana Agent: https://grafana.com/docs/agent/latest/
Extra: Sizing do cluster loki https://grafana.com/docs/loki/latest/installation/sizing/