Deploying Prometheus And Grafana in Kubernetes

Task :-

1. Deploy them as pods on top of Kubernetes by creating resources Deployment, Replica Sets, pods and Services .
2. And make their data to be remain persistent .
3. And both of them should be exposed to the outside world .

Project Description

• ConfigMap for attaching config file with prometheus.

apiVersion: v1
kind: ConfigMap
metadata:
  name: prometheus-configmap
  labels:
    app: prometheus
data:
  prometheus.yml: |
    global:
      scrape_interval:     15s 
      evaluation_interval: 15s 
    scrape_configs:
     - job_name: 'prometheus'
       static_configs:

       - targets: ['localhost:9090']

• PVC resource to make Prometheus data persistent

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: prometheus-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:

      storage: 3Gi

• Service for prometheus.

apiVersion: v1
kind: Service
metadata:
  name: prometheus-service
  labels:
    app: prometheus
spec:
  ports:
    - port: 9090
  selector:
    app: prometheus
  type: NodePort
  ports:
  - port: 9090
    nodePort: 31005
    name: prom-port

• Deployment to launch and expose Prometheus

apiVersion: apps/v1
kind: Deployment
metadata:
  name: prometheus-deploy
  labels:
    app: prometheus
spec:
  replicas: 1
  selector:
    matchLabels:
      app: prometheus
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: prometheus
    spec:
      containers:
      - image: vimal13/prometheus
        name: prometheus
        ports:
        - containerPort: 9090
          name: prometheus
        volumeMounts:
        - name: prometheus-config
          mountPath: etc/prometheus/prometheus.yml
          subPath: prometheus.yml
        - name: prometheus-storage
          mountPath: /prometheus
      volumes:
        - name: prometheus-config
          configMap:
            name: prometheus-config
        - name: prometheus-storage
          persistentVolumeClaim:
            claimName: prometheus-vpc

Complete prometheus.yml file

apiVersion: v1
kind: ConfigMap
metadata:
  name: prometheus-configmap
  labels:
    app: prometheus
data:
  prometheus.yml: |
    global:
      scrape_interval:     15s 
      evaluation_interval: 15s 
    scrape_configs:
     - job_name: 'prometheus'
       static_configs:

       - targets: ['localhost:9090']
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: prometheus-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:

      storage: 3Gi
---
apiVersion: v1
kind: Service
metadata:
  name: prometheus-service
  labels:
    app: prometheus
spec:
  ports:
    - port: 9090
  selector:
    app: prometheus
  type: NodePort
  ports:
    - port: 9090
      nodePort: 31005
      name: prom-port
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: prometheus-deploy
  labels:
    app: prometheus
spec:
  replicas: 1
  selector:
    matchLabels:
      app: prometheus
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: prometheus
    spec:
      containers:
      - image: vimal13/prometheus
        name: prometheus
        ports:
        - containerPort: 9090
          name: prometheus
        volumeMounts:
        - name: prometheus-config
          mountPath: etc/prometheus/prometheus.yml
          subPath: prometheus.yml
        - name: prometheus-storage
          mountPath: /prometheus
      volumes:
        - name: prometheus-config
          configMap:
            name: prometheus-config
        - name: prometheus-storage
          persistentVolumeClaim:
            claimName: prometheus-pvc

• Service for grafana

apiVersion: v1
kind: Service
metadata:
  name: grafana-service
  labels:
    app: grafana
spec:
  ports:
    - port: 3000
  selector:
    app: grafana
  type: NodePort

• PVC for grafana

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: grafana-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 3Gi

• Deployment resource for launch, expose and make Grafana persistent

apiVersion: apps/v1 
kind: Deployment
metadata:
  name: grafana-deploy
  labels:
    app: grafana
spec:
  replicas: 1
  selector:
    matchLabels:
      app: grafana
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: grafana
    spec:
      containers:
      - image: grafana/grafana
        name: grafana
        ports:
        - containerPort: 3000
          name: grafana
        volumeMounts:
        - name: grafana-storage
          mountPath: "/var/lib/grafana"
      volumes:
        - name: grafana-storage
          persistentVolumeClaim:
            claimName: grafana-pvc

Complete grafana.yml file

apiVersion: v1
kind: Service
metadata:
  name: grafana-service
  labels:
    app: grafana
spec:
  ports:
    - port: 3000
  selector:
    app: grafana
  type: NodePort
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: grafana-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 3Gi
---
apiVersion: apps/v1 
kind: Deployment
metadata:
  name: grafana-deploy
  labels:
    app: grafana
spec:
  replicas: 1
  selector:
    matchLabels:
      app: grafana
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: grafana
    spec:
      containers:
      - image: grafana/grafana
        name: grafana
        ports:
        - containerPort: 3000
          name: grafana
        volumeMounts:
        - name: grafana-storage
          mountPath: "/var/lib/grafana"
      volumes:
        - name: grafana-storage
          persistentVolumeClaim:
            claimName: grafana-pvc

• Here I use kustomization.yml file for launch the whole setup in one click

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources:
  - prometheus.yml
  - grafana.yml

We have to start kubernetes

Launching all resources