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Prometheus

Prometheus is a systems and service monitoring system.

  • Monitoring & Logging
  • Network Services
  • Productivity
Prometheus is a systems and service monitoring system. It collects metrics from configured targets at given intervals, evaluates rule expressions, displays the results, and can trigger alerts if some condition is observed to be true.

Platform availability

Available on 4 of 9 platforms

Health score?A 0-100 score computed nightly from four factors: maintained (40%: recent commits and steady activity), popular (25%: GitHub stars, log scale), easy to install (20%: platforms, install notes, setup guides, Docker image) and light to run (15%: minimum RAM, ARM support). When the source code has been checked, a fifth factor, security check (20%: automated scan for committed secrets, unsafe desktop-app settings, known-vulnerable dependencies and project hygiene; any serious finding caps it at 20), is added. Factors without data are left out and the rest are rescaled.

86/100 Excellent

Maintained
100last commit 9 days ago
Popular
9666,397 GitHub stars
Easy to install
654 install platforms, install notes, Docker image
Light to run
602 GB minimum RAM, runs on ARM

Availability: platform listings confirmed today, links checked 17 days ago

GitHub stars
66,397
Open issues
969
Last commit
2026-10-06
Latest release
v3.15.0
License
Apache-2.0
Activity
declining

Checked 9 days ago - source: GitHub (prometheus/prometheus)

Resources & Compatibility

Minimum requirements: 2 GB RAM. ARM (e.g. Raspberry Pi) is supported.

Checked 17 days ago - source: Docker Hub image tags and published docs

First-install notes

  • Start with the kube-prometheus repo Clone the kube-prometheus repository to get the Prometheus Operator install manifests. It is the documented easiest starting point; without it, you do not have the ready-made files to deploy the stack. source
  • Set a namespace before applying Kustomize Set NAMESPACE to a namespace other than default, then generate and apply the Kustomize bundle. This keeps the operator resources isolated from your apps; skipping it can leave them in the default namespace or mix them with other workloads. source
  • Match ServiceMonitor to the app port Set the ServiceMonitor endpoint to the web port and keep the Service/container port at 8080. This tells Prometheus where to scrape the example app; if it is wrong, the app runs but no metrics appear. source

Fetched 17 days ago - each note links to its source

Alternatives (12)

  • Amazon CloudWatch - Amazon CloudWatch is a monitoring service for AWS cloud resources and the applications running on AWS.
  • Better Stack - AI-driven monitoring platform providing incident management, real-time logs, uptime, traces, error tracking, infrastructure analytics, and…
  • Datadog - Datadog Agent is an on-host monitoring agent that collects metrics, logs, and traces from hosts, containers, and Kubernetes clusters and se…
  • DeepFlow - Unify your cloud-native monitoring with zero-code eBPF, advanced profiling, and 10x storage efficiency.
  • Grafana Loki - Grafana Loki is an open-source log aggregation system.
  • Graylog - Graylog is a centralized log management platform built on open standards for capturing, storing, and analyzing terabytes of machine data in…
  • InfluxDB - InfluxDB is an open source time series database with no external dependencies.
  • Kibana - Kibana is the data visualization layer for querying, analyzing, and managing data stored in Elasticsearch.
  • New Relic - Pinpoint and solve performance issues in your Ruby, Java, .NET, PHP and Python apps with real user, application and server monitoring.
  • Splunk - Splunk is a self-hosted platform for collecting, indexing, searching, and analyzing log and security data, helping homelabbers and operatio…
  • VictoriaMetrics - Cost-effective easy to use monitoring solution and time series database.
  • questdb - QuestDB is an open-source database designed to make time-series lightning fast and easy.

Checked 14 days ago - source: AlternativeTo

Common questions

Which host address does the Docker quickstart bind Prometheus to?

The documented Docker command maps container port 9090 to 127.0.0.1:9090.

Can Prometheus accept pushed time series from batch jobs?

Yes, pushing is supported via an intermediary gateway, while collection uses an HTTP pull model.

Why should a Prometheus Operator Kustomize installation use a non-default namespace?

Set NAMESPACE to a namespace other than default so Operator resources stay isolated from your apps and do not mix with other workloads.

Why might an app scraped by a ServiceMonitor run but produce no metrics?

The ServiceMonitor endpoint must point to the app's web port while the Service/container port stays 8080; a mismatch can leave the app running without metrics.

Answers sourced from github.com, prometheus-operator.dev, prometheus-operator.dev

Community

Collected 11 days ago - public community threads