go-prom

Go server exposing a prometheus endpoint

Pre-requisites

• Running kubernetes cluster with prometheus agent installed as outlined in Prometheus installation section
• Deploy the go-prom application to the cluster. Metrics are exposed at :2112/metrics
• Edit the configmap called prometheus-server to add a job which would scrape the metrics from this. The job config is specified below -

  - job_name: 'go-prom'
      static_configs:
      - targets: ['go-prom:2112]

• This would create a new target that can be viewed in the prometheus dashboard

Prometheus installation steps

• helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
• helm repo update
• helm install prometheus prometheus-community/prometheus

Local setup

• Launch a kind cluster -

  kind create cluster
  

• Build the docker image locally and load it into the cluster. These steps would make the image available locally within the cluster

  docker build --tag go-prom:1.0.0 .
  kind load docker-image go-prom:1.0.0
  

• Create the service and deployment for go-prom within the cluster

  kubectl apply -f go-prom-app.yaml
  

• Port forward prometheus-server port 80 to view the prometheus dashboard locally

  kubectl port-forward service/prometheus-server 80