How to configure your dev env

Prepare

1. Assume you have Docker installed.
2. Install VScode extensions: Kubernetes, Kubernetes Kind.
3. Install kubectl

   curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"

4. Install kind

   curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.12.0/kind-linux-amd64
   chmod +x ./kind
   sudo mv ./kind /usr/local/bin/

Create K8s cluster

From VScode Activity bar, find Kubernetes, in the clouds view, right click Kind to create cluster.

Build Go simulator images and push to K8s cluster

make build-all
make push-all

Create deployments and services for NATs server, Consumer and Producer

make deploy-nats-stack

Logging

kubectl log -f deployments/producer
kubectl log -f deployments/consumer
kubectl log -f deployments/nats

Monitor NATs server:

Monitor with nats-top

kubectl port-forward deployments/nats 8222:8222 Local: nats-top

Monitor with Grafana

Deploy monitor stack

make deploy-nats-monitor

Port-forward to host

kubectl port-forward deployments/grafana 3000:3000

Config Grafana

1. Browser-open Grafana and login with admin:admin
2. Configuration-->Data Sources, add URL http://prometheus:9090 and save
3. Create-->Import-->input number 2279 for NATs dashboard-->Load. Then you can enjoy NATs dashboard.

Scaling

From VScode Activity bar --> Kubernetes --> Clusters --> kind-kind --> Workloads --> Deployments --> right click consumer/nats/producer --> Scale as you need. If you need to remove one, just assign Scale=0