How to Setup Nginx Ingress and Monitor Ingress Metrics with Prometheus & Grafana

 

 

To monitor Nginx Ingress metrics with prometheus and grafana, you need to install customize prometheus and grafana 

At first setup nginx ingress using helm

kubectl create ns ingress-nginx

helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx

helm repo update

helm install ingress-nginx ingress-nginx/ingress-nginx

Then upgrade the nginx ingress to  allow and create metrics scrapping service

helm upgrade ingress-nginx ingress-nginx/ingress-nginx \

--namespace ingress-nginx \

--set controller.metrics.enabled=true \

--set-string controller.podAnnotations."prometheus\.io/scrape"="true" \

--set-string controller.podAnnotations."prometheus\.io/port"="10254"

 Then need to insatll prometheus. It can be installed by collecting all of the yaml files from this link: https://github.com/kubernetes/ingress-nginx/tree/main/deploy/prometheus

Or, just simply run this command if you want to deploy prometheus in ingress-nginx namespace 

kubectl apply --kustomize github.com/kubernetes/ingress-nginx/deploy/prometheus/

 Then Insatll grafana

kubectl apply --kustomize github.com/kubernetes/ingress-nginx/deploy/grafana/

NodePort

Note the NodePort of the services

kubectl get svc -n ingress-nginx

You can simply access the grafana and prometheus dashboard by master ip of your kubernetes cluster and nodeport of prometheus-server and grafana. 

http://master-ip:nodeport 

To import dashboard click on the + sign on left sidebar and click import. Give 9614 as id and click load. Then select the datasource and import. Dashboard Link: https://grafana.com/grafana/dashboards/9614

ClusterIP

If you want to access using ClusterIP and nginx ingress then simply edit the services of prometheus & grafana and change from NodePort to ClusterIP

Then apply the ingress with your domain for grafana and prometheus

apiVersion: networking.k8s.io/v1

kind: Ingress

metadata:

annotations:

kubernetes.io/ingress.class: nginx

name: graphana-dashboard

namespace: ingress-nginx

spec:

rules:

- host: grafana.devops.com

http:

paths:

- backend:

service:

name: grafana

port:

number: 3000

path: /

pathType: ImplementationSpecific

apiVersion: networking.k8s.io/v1

kind: Ingress

metadata:

annotations:

kubernetes.io/ingress.class: nginx

name: prometheus-metrics

namespace: ingress-nginx

spec:

rules:

- host: prometheus.devops.com

http:

paths:

- backend:

service:

name: prometheus-server

port:

number: 9090

path: /

pathType: ImplementationSpecific

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About Ashadullah Shawon

I am Ashadullah Shawon. I am a Software Engineer. I studied Computer Science and Engineering (CSE) at RUET. I Like To Share Knowledge. Learn More: Click Here