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compendium_prometheus's Introduction

Compêndio Prometheus + Grafana

Docker

Todos os exemplos utilizarão Docker e docker-compose. Este conhecimento é essencial e será explicado na sessão [0_docker].

  • Hello World
  • Build image
  • Cache and Build vs Run time
  • Entrypoint and CMD
  • Docker Compose
  • Volumes

Metrics

Instrumentar códgio em Go e Java para expor /metrics

  • Counter
  • Gauge
  • Histogram
  • Summary
  • Histogram vs Summary

Prometheus

Subir um prometheus para fazer scrape e mostrá-lo no /graph

Federação: conceito e como fazer para passar info no /federate

  • rules.yml
  • alerts.yml
  • prometheus.yml
  • ENVS: {scrapeinterval, evaluateinterval, scrapetimeout, tsdbretention, rulespath, alertspath, startupfile, prometheusname, targetsfile}

Grafana

Arquivo de configuração para adicionar o prometheus como fonte dos dados

  • grafana-cli plugins install
  • /etc/grafana/dashboards
  • /etc/grafana/provisioning/dashboards
  • /etc/grafana/provisioning/datasources
  • volume ["/data"]

Promster

Subir um conjunto de serviços para o promster rodar com 2 níveis

  1. Subir ETCD para escrever, ler, e apagar uma chave (explicar ETCDCTL_API=3 e como dar export)
  2. Subir um etcd_registrar para registrar um IP e mantê-lo ativo, matar o serviço para ver a chave sumindo do ETCD (utilizar watch etcdctl get --prefix /)
  3. Subir o promster level 1 e level 2
  4. Configurar o grana
  • etcd
  • registry
  • rule
  • match regex

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