Table of Contents
Kube-prometheus
Kube-prometheus is a curated collection of Kubernetes manifests, Grafana dashboards, and Prometheus rules designed to provide a comprehensive and production-ready monitoring solution for Kubernetes clusters. It leverages the power of Prometheus, the leading open-source monitoring and alerting toolkit, and Grafana, a popular visualization and dashboarding platform, to deliver a holistic view of your cluster's health and performance.
Key Features
- **Curated Manifests:** Kube-prometheus includes a set of pre-configured Kubernetes manifests that deploy and configure essential monitoring components, including:
* Prometheus: The core monitoring and time-series database. * Alertmanager: Handles alerts triggered by Prometheus. * Grafana: A visualization platform for creating dashboards and charts. * Node Exporter: Collects hardware and operating system metrics from Kubernetes nodes. * Kube-state-metrics: Generates metrics about the state of Kubernetes objects.
- **Grafana Dashboards:** It provides a set of pre-built Grafana dashboards that visualize key metrics and offer insights into cluster health, resource utilization, and application performance.
- **Prometheus Rules:** Kube-prometheus includes a collection of Prometheus rules that define alerts for common issues and anomalies in your cluster.
Benefits
- **Production-Ready Monitoring:** Kube-prometheus provides a comprehensive and battle-tested monitoring solution, ready for deployment in production environments.
- **Simplified Setup:** The curated manifests streamline the installation and configuration of core monitoring components, saving time and effort.
- **Comprehensive Visibility:** The included Grafana dashboards and Prometheus rules offer a holistic view of your cluster's health, performance, and resource utilization.
- **Proactive Alerting:** The pre-configured alerts help you identify and respond to potential issues before they impact your users.
- **Community-Driven:** Kube-prometheus is an open-source project with an active community, fostering collaboration and continuous improvement.
Code Examples
While Kube-prometheus focuses on Kubernetes manifests and configurations, here's a simplified example of a Prometheus alert rule included in the project:
```yaml groups: - name: kubernetes-apps
rules:
- alert: KubeDeploymentReplicasMismatch
expr: kube_deployment_status_replicas_available != kube_deployment_spec_replicas
for: 10m
labels:
severity: warning
annotations:
summary: "Deployment replicas mismatch ({{ $labels.namespace }}/{{ $labels.deployment }})"
description: "{{ $labels.deployment }} in namespace {{ $labels.namespace }} has not matched the expected number of replicas for longer than 15 minutes."
```
This rule triggers an alert when the number of available replicas in a deployment doesn't match the desired number of replicas for more than 15 minutes.
Additional Resources
- **Kube-prometheus GitHub Repository:** s://github.com/prometheus-operator/kube-prometheus(https://github.com/prometheus-operator/kube-prometheus)