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DAY-42 | KUBERNETES MONITORING USING PROMETHEUS & GRAFANA |LIVE DEMO |STEPS IN GITHUB | #kubernetes
Abhishek.Veeramalla
Overview
This video demonstrates how to set up and use Prometheus and Grafana for monitoring Kubernetes clusters. It begins by explaining the importance of monitoring in a Kubernetes environment, especially as the number of clusters and teams using them grows. The tutorial then introduces Prometheus as an open-source monitoring and alerting toolkit and Grafana as a visualization platform. A practical demonstration follows, showing the installation of Prometheus and Grafana on a Minikube cluster using Helm. The video covers exposing services, accessing the Prometheus UI, and configuring Grafana with Prometheus as a data source. It also highlights the utility of Cube State Metrics for gathering more detailed Kubernetes resource information and touches upon how to integrate custom application metrics.
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Chapters
- •Importance of monitoring in Kubernetes for managing multiple clusters and teams.
- •Introduction to Prometheus for monitoring and Grafana for visualization.
- •Availability of a GitHub repository with installation steps and demo configurations.
- •Prerequisite: A working Kubernetes cluster (Minikube, k3s, etc.).
- •Prometheus server collects metrics via HTTP.
- •Kubernetes API server exposes default metrics (e.g., /metrics endpoint).
- •Prometheus stores data in a time-series database.
- •Integration with Alertmanager for notifications (Slack, email).
- •Prometheus UI for querying metrics (PromQL).
- •Grafana provides enhanced visualization of metrics.
- •It can use various data sources, including Prometheus.
- •Dashboards in Grafana display data in charts and graphs.
- •Pre-built dashboards are available for quick setup.
- •Starting a Minikube cluster using `minikube start` command.
- •Recommendation to use a specific driver like `hyperkit` for better networking.
- •Configuring memory and driver options for Minikube.
- •Verifying the cluster status with `kubectl get pods -a`.
- •Adding the Prometheus community Helm repository (`helm repo add`).
- •Updating Helm repositories (`helm repo update`).
- •Installing the Prometheus controller using `helm install`.
- •Verifying Prometheus pod status (`kubectl get pods`).
- •Cube State Metrics provides additional Kubernetes resource metrics beyond the API server.
- •It offers details on deployments, pods, services, and replica counts.
- •Installed by default with the Prometheus Helm chart.
- •Can be exposed as a service to access its metrics endpoint.
- •Converting ClusterIP services to NodePort for external access.
- •Using `kubectl expose service` to create external services.
- •Accessing Prometheus UI via NodePort (e.g., `http://<minikube-ip>:<node-port>`).
- •Accessing Cube State Metrics metrics endpoint.
- •Adding the Grafana Helm repository.
- •Installing Grafana using `helm install`.
- •Retrieving the Grafana admin password using `kubectl get secret`.
- •Exposing the Grafana service using NodePort.
- •Logging into Grafana with admin credentials.
- •Configuring Prometheus as a data source in Grafana.
- •Using the 'import dashboard' feature in Grafana.
- •Importing a pre-built Kubernetes dashboard (ID: 3362).
- •Visualizing Kubernetes node and API server metrics.
- •Leveraging Cube State Metrics for detailed resource information.
- •Exposing Cube State Metrics endpoint and accessing its metrics.
- •Configuring Prometheus to scrape custom application metrics.
- •Developers need to implement metrics endpoints for their applications.
- •Updating Prometheus configuration (ConfigMap) to include new scrape targets.
Key Takeaways
- 1Monitoring is crucial for managing Kubernetes environments effectively.
- 2Prometheus collects metrics, and Grafana visualizes them, providing a powerful monitoring solution.
- 3Helm charts simplify the installation of complex applications like Prometheus and Grafana.
- 4Cube State Metrics significantly enhances Kubernetes monitoring by providing detailed resource information.
- 5Exposing services via NodePort is a simple way to access them locally, while Ingress is preferred for production.
- 6Grafana's import feature allows quick setup of monitoring dashboards using community-provided templates.
- 7Integrating custom application metrics requires developers to expose metrics endpoints, which can then be scraped by Prometheus.