monitoring

name	monitoring
description	Master Kubernetes observability, monitoring with Prometheus, logging, metrics, and distributed tracing. Learn to implement comprehensive monitoring strategies.

Kubernetes Monitoring & Observability

Quick Start

Install Prometheus Stack

# Add Prometheus Helm repository
helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
helm repo update

# Install kube-prometheus-stack
helm install prometheus prometheus-community/kube-prometheus-stack \
  -n monitoring --create-namespace

Basic Prometheus Queries

# CPU usage by pod
sum(rate(container_cpu_usage_seconds_total[5m])) by (pod_name)

# Memory usage
sum(container_memory_usage_bytes) by (pod_name)

# Request rate
sum(rate(http_request_duration_seconds_count[5m]))

Enable Container Logs

# View pod logs
kubectl logs pod-name

# Follow logs
kubectl logs -f pod-name

# Logs from specific container
kubectl logs pod-name -c container-name

# Previous crashed container logs
kubectl logs pod-name --previous

Core Concepts

Metrics Collection

• Prometheus: Metrics collection and storage
• node-exporter: Host metrics
• kube-state-metrics: Kubernetes resource metrics
• cAdvisor: Container metrics

Grafana Dashboards

# Access Grafana
kubectl port-forward -n monitoring svc/prometheus-grafana 3000:80

# Default credentials
# Username: admin
# Password: prom-operator

Logging Stack

• Fluentd/Logstash: Log collection
• Elasticsearch: Log storage
• Kibana: Log visualization

Key Metrics

• Pod CPU and memory usage
• Node resource availability
• API server latency
• Etcd performance
• Container restart count

Advanced Topics

Distributed Tracing

# Install Jaeger
helm install jaeger jaegertracing/jaeger -n tracing --create-namespace

# Configure application tracing
# Use OpenTelemetry SDK

Custom Metrics

apiVersion: v1
kind: ConfigMap
metadata:
  name: prometheus-config
data:
  prometheus.yml: |
    global:
      scrape_interval: 15s
    scrape_configs:
    - job_name: 'kubernetes-pods'
      kubernetes_sd_configs:
      - role: pod

AlertManager

apiVersion: v1
kind: ConfigMap
metadata:
  name: alertmanager-config
data:
  config.yml: |
    route:
      receiver: 'default'
    receivers:
    - name: 'default'
      slack_configs:
      - api_url: 'YOUR_SLACK_WEBHOOK_URL'

Resources

• Prometheus Documentation
• Grafana Documentation
• Kubernetes Monitoring