Скачать или смотреть "Complete Prometheus & Grafana Setup | Kubernetes Monitoring Tutorial"

Prometheus is a powerful open-source monitoring and alerting toolkit, while Grafana provides stunning visualizations and dashboards for your metrics.

🔥 What You Will Learn in This Video
✅ What is Prometheus and how it works in Kubernetes
✅ What is Grafana and how it visualizes Prometheus metrics
✅ Installing Prometheus using Helm in a Kubernetes cluster
✅ Configuring Prometheus server, Alertmanager, and exporters
✅ Setting up Node Exporter and kube-state-metrics
✅ Installing Grafana and connecting it with Prometheus
✅ Creating beautiful dashboards in Grafana
✅ Setting up alerts for critical metrics
✅ Best practices for monitoring Kubernetes workloads

📌 What is Prometheus?
Prometheus is an open-source monitoring and alerting system designed for reliability and scalability. It collects metrics from configured targets at given intervals, evaluates rule expressions, and can trigger alerts when conditions are met.

Prometheus Architecture Components:
🔹 Prometheus Server – Scrapes and stores metrics
🔹 Exporters – Help collect metrics from various sources, such as Node Exporter and cAdvisor
🔹 Alertmanager – Manages alerts sent by Prometheus
🔹 Pushgateway – Allows short-lived jobs to push their metrics
🔹 Query Language (PromQL) – Used for querying and analyzing metrics

📌 What is Grafana?
Grafana is an open-source data visualization and monitoring tool that integrates with Prometheus, allowing you to create real-time dashboards, alerts, and reports.

Grafana Features:
✅ Supports multiple data sources including Prometheus, Loki, InfluxDB, and Elasticsearch
✅ Custom dashboards with real-time data visualization
✅ Alerting system with notifications via email, Slack, and more
✅ Role-based access control (RBAC) for security
✅ Highly customizable with plugins and themes

🚀 Step-by-Step Setup: Prometheus and Grafana on Kubernetes

Step 1: Install Helm (if not already installed)
Helm is a package manager for Kubernetes. Install it using:
curl https://raw.githubusercontent.com/hel... | bash

Step 2: Add Prometheus Helm Repository

helm repo add prometheus-community https://prometheus-community.github.i...
helm repo update
Step 3: Deploy Prometheus using Helm

helm install prometheus prometheus-community/kube-prometheus-stack --namespace monitoring --create-namespace
This will install:
✔ Prometheus Server
✔ Node Exporter
✔ Alertmanager
✔ Kube-state-metrics

Step 4: Verify Prometheus Installation

kubectl get pods -n monitoring
If all pods are running, the installation is successful.

Step 5: Expose Prometheus UI (Optional, for testing)

kubectl port-forward svc/prometheus-kube-prometheus-prometheus 9090 -n monitoring
Now, open http://localhost:9090 to access the Prometheus UI.

🎨 Setting Up Grafana for Visualization

Step 6: Install Grafana using Helm

helm install grafana grafana/grafana --namespace monitoring
Step 7: Get Grafana Admin Password

kubectl get secret --namespace monitoring grafana -o jsonpath="{.data.admin-password}" | base64 --decode
Step 8: Access Grafana UI
Expose Grafana via port-forwarding:

kubectl port-forward svc/grafana 3000:80 -n monitoring
Now, open http://localhost:3000 and log in with:

Username: admin
Password: (Use the decoded password from Step 7)
Step 9: Add Prometheus as a Data Source

Go to Configuration Data Sources
Click Add data source
Select Prometheus
Set the URL:
http://prometheus-kube-prometheus-pro...
Click Save and Test
📊 Creating a Kubernetes Monitoring Dashboard in Grafana

Go to Dashboards Import
Enter the Dashboard ID, such as 3119 for Kubernetes Cluster Monitoring
Select the Prometheus data source
Click Import to load the dashboard
You will now see real-time Kubernetes metrics!

📢 Setting Up Alerting in Prometheus and Grafana

Step 10: Configure Prometheus Alerts
Edit the Prometheus alert rules:

groups:
name: instance_down
rules:
alert: InstanceDown
expr: up == 0
for: 5m
labels:
severity: critical
annotations:
summary: "Instance {{ $labels.instance }} down"
description: "Instance {{ $labels.instance }} has been down for more than 5 minutes."
Apply the configuration and restart Prometheus.

Step 11: Configure Alerts in Grafana

Go to Alerting Alert Rules
Click New Alert Rule
Set the PromQL query, such as node_cpu_seconds_total for CPU usage
Define thresholds and set notification settings
Click Save
You can now receive alerts via Slack, email, PagerDuty, and more.

🔥 Best Practices for Prometheus and Grafana Monitoring
✅ Use Prometheus Federation for scaling large environments
✅ Set retention policies to optimize storage
✅ Use Alertmanager for centralized alert handling
✅ Automate dashboard provisioning using Grafana JSON models
✅ Secure Prometheus and Grafana with RBAC and authentication


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