Apa saéné alat monitoring umum lan saéné cara milih antarané?

Question

Accepted Answer

Madya pamisahan dening tiyangé — metrik, log, trace — plus platform managed kabéh-ing-sapak. Pilihan sampun terus-terusan dening **self-hosted vs managed**, dipandu kalebu ukuran tim, budget, lan skala.

## Alat dening tiyangé

```text
METRICS    Prometheus  → pull-based scraping, time-series DB, PromQL query language
           Grafana     → dashboards on top of Prometheus (and many other sources)

LOGS       ELK         → Elasticsearch + Logstash + Kibana (powerful, heavy to run)
           Loki        → "Prometheus for logs": cheap, indexes labels not full text

TRACES     Jaeger      → distributed tracing, OpenTelemetry-compatible
           Tempo       → trace backend that pairs with Grafana/Loki

ALL-IN-ONE Datadog     → managed metrics + logs + traces + APM in one product
```

## Nénapa Prometheus + Grafana mujudaken core open-source umum

Prometheus **nyedhak** metrik saka target sing didandani (layanan nerangké `/metrics`), nyimpen ing DB wektu-serial, lan payu kaliyan **PromQL**. Pull nggawaké target gampil kanggo nemu lan health-check. Grafana lungguh ing ndhuwur kanggo visualisasi. Loki lan Tempo mangkat tumpukan sing padha dening log lan trace, kabéh bisa payu ing siji Grafana UI.

```promql
# PromQL: per-route error ratio over 5 minutes
sum by (route) (rate(http_requests_total{status=~"5.."}[5m]))
  / sum by (route) (rate(http_requests_total[5m]))
```

## Tradeoff self-hosted vs managed

```text
SELF-HOSTED (Prometheus/Grafana/Loki/Tempo)
  ✓ no per-host bill, full control, no data leaves your infra
  ✗ you run, scale, and patch it; storage & HA are your problem

MANAGED (Datadog, Grafana Cloud)
  ✓ no ops burden, integrations out of the box, scales for you
  ✗ costs grow fast with hosts/volume; some vendor lock-in
```

## Carane milih

```text
Small team / tight budget   → self-hosted Prometheus + Grafana (+ Loki)
Fast-moving, ops-light team  → managed (Datadog / Grafana Cloud)
Large scale / strict cost    → self-host the core, but budget for the ops team
```

## Nénapa pangéran

Tidak ana alat sing luwih apik sacara universal — mung cocog kanggo watesé. Startup 5-wong lelakuan nyumet nyoba ngoperasikaké klaster Elasticsearch HA; perusahaan gedé bisa murni enem figur per tahun ing platform managed bisa didandani. Kapaké apa alat saben lan self-hosted-vs-managed tradeoff marengken cocog observability dening ukuran tim, budget, lan skala tinimbang cargo-culting apa sing populer.