Kubernetes Monitoring with Prometheus and Grafana

This project sets up a monitoring solution for a Kubernetes cluster using Prometheus and Grafana. It visualizes metrics such as CPU usage, memory consumption, and pod status.

Components

Prometheus

Prometheus is an open-source systems monitoring and alerting toolkit. In this setup, Prometheus collects metrics from the Kubernetes cluster and its components.

• prometheus/configmap.yaml: Defines the Prometheus configuration. It includes scrape configurations for collecting metrics from Kubernetes nodes and pods.
• prometheus/deployment.yaml: Deploys Prometheus as a single-instance deployment.
• prometheus/service.yaml: Exposes Prometheus on a NodePort for external access.

Node Exporter

Node Exporter is a Prometheus exporter for hardware and OS metrics exposed by *nix kernels. It's deployed as a DaemonSet to ensure an instance runs on each node.

• node-exporter/daemonset.yaml: Deploys Node Exporter as a DaemonSet to collect node-level metrics.
• node-exporter/service.yaml: Exposes Node Exporter metrics on a NodePort for Prometheus to scrape.

Grafana

Grafana is an open-source platform for monitoring and observability. It allows users to query, visualize, alert on, and explore metrics and logs.

• grafana/configmap.yaml: Defines Grafana's data source configuration. It sets up Prometheus as the default data source.
• grafana/deployment.yaml: Deploys Grafana as a single-instance deployment.
• grafana/service.yaml: Exposes Grafana on a NodePort for external access.

Setup

Prometheus

1. Apply Prometheus configuration:

   kubectl apply -f manifests/prometheus/configmap.yaml

2. Deploy Prometheus:

   kubectl apply -f manifests/prometheus/deployment.yaml
   kubectl apply -f manifests/prometheus/service.yaml

Node Exporter

1. Deploy Node Exporter:

   kubectl apply -f manifests/node-exporter/daemonset.yaml
   kubectl apply -f manifests/node-exporter/service.yaml

Grafana

1. Apply Grafana configuration:

   kubectl apply -f manifests/grafana/configmap.yaml

2. Deploy Grafana:

   kubectl apply -f manifests/grafana/deployment.yaml
   kubectl apply -f manifests/grafana/service.yaml

Accessing the Dashboards

• Prometheus: Accessible at http://<node-ip>:32001
• Grafana: Accessible at http://<node-ip>:32000

Adding Grafana Dashboards

1. Login to Grafana (default credentials: admin/admin).
2. Configure the Prometheus data source (it should already be configured via the ConfigMap).
3. Import pre-built dashboards or create your own to visualize metrics.

Conclusion

This setup provides a simple yet effective monitoring solution for Kubernetes clusters using Prometheus and Grafana. You can expand and customize this solution based on your monitoring needs.

License

This project is licensed under the MIT License.