Integrated Prometheus and Grafana using Kubernetes

Task-5

Integrate Prometheus and Grafana and perform in following way:

1. Deploy them as pods on top of Kubernetes by creating resources Deployment, ReplicaSet, Pods or Services

2. And make their data to be remain persistent 

3. And both of them should be exposed to outside world

Description :

Prometheus is a free software application used for event monitoring and alerting. It records real-time metrics in a time series database.

Grafana is an open-source platform for data visualization, monitoring and analysis tool.

Let's start to create yaml file to do this task

ConfigMap for Prometheus

• ConfigMap is similar to Secrets

apiVersion: v1
kind: ConfigMap
metadata:
  name: config-pro
data:
  prometheus.yml: |-
    global:
      scrape_interval:     10s
      evaluation_interval: 10s
    scrape_configs:
      - job_name: 'kubernetes'
        static_configs:
        - targets: ['localhost:9090']

Service for Prometheus

• Service is responsible for enabling network access to a set a pods.
• Here pod will run on 9090 and service is running on port 30000

apiVersion: v1
kind: Service
metadata:
  name: prometheus
  labels:
    app: prometheus
spec:
  ports:
    - port: 9090
      nodePort: 30000
  selector:
    app: prometheus
    tier: backend
  type: NodePort

Persistent Volume for Prometheus

• The data where volume is mounted will remain even after the pod is deleted.

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: prometheus-storage
  labels:
    app: prometheus
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 2Gi
     

Deployment for Prometheus

• Deployment is responsible for keeping a set of pod running
• Url https://<minikube ip>:30000

apiVersion: apps/v1
kind: Deployment
metadata:
  name: prometheus
spec:
  replicas: 1
  selector:
    matchLabels:
      app: prometheus
      tier: backend
  strategy:
    type: Recreate
  template:
    metadata:
      labels: 
        app: prometheus
        tier: backend
    spec:
      containers:
      - name: prometheus
        image: prom/prometheus
        volumeMounts:
        - name: pro-volume
          mountPath: /etc/prometheus
        - name: all-info
          mountPath: /prometheus
        ports:
        - containerPort: 80
      securityContext:
        runAsUser: 0
      volumes:
        - name: pro-volume
          configMap:
            name: config-pro
        - name: all-info
          persistentVolumeClaim:
            claimName: prometheus-storage

Prometheus web UI

Service for Grafana

apiVersion: v1
kind: Service
metadata:
  name: grafana
  labels:
    app: grafana
spec:
  ports:
    - port: 3000
      nodePort: 30001
  selector:
    app: grafana
    

  type: NodePort

Persistent Volume for Grafana

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: grafana-storage
  labels:
    app: grafana
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 2Gi

Deployment for Grafana

Url https://<minikube ip>:30001

apiVersion: v1

kind: Deployment
metadata:
  name: grafana
  labels:
    app: grafana
    tier: frontend
spec:
  selector:
    matchLabels:
      app: grafana
      tier: frontend
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: grafana
        tier: frontend
    spec:
      containers:
      - image: grafana/grafana:latest
        name: grafana
        ports:
        - containerPort: 3000
          name: grafana
        volumeMounts:
        - name: all-info
          mountPath: /var/lib/grafana
      volumes:
      - name: all-info
        persistentVolumeClaim:
          claimName: grafana-storage

Grafana web UI

Login page

• username and password both are admin by default
• To connect to prometheus give url of it

Successfully we had deployed Prometheus and Grafana on the top of Kubernetes.

For any queries, suggestions and feedback feel free to contact me.