microsvc-test

Deploy a simple microservice written in Golang into a Istio service mesh on a Kubernetes cluster with Prometheus, Grafana, and Jaeger support.

Requirements

• Golang binaries https://golang.org/doc/install
• Vagrant
• VirtualBox
• Ubuntu 16.04
• 4 available cores: 2 cores for kubemaster, 1 core each for kubenode1 and kubenode2
• 6 GB RAM
• IP Addresses listed below ** 172.16.0.40 for kubemaster ** 172.16.0.41 for kubenode1 ** 172.16.0.42 for kubenode2 ** 172.16.0.130 - 172.16.0.140 for Kubernetes LoadBalancer and Ingress use.

Clone Repository

• Start a command shell
• go get github.com/tang-john/microsvc-test

Test Appication

• cd ~/src/github.com/tang-john/microsvc-test
• go run main.go
• open a browser and navigate to the following URLs ** http://localhost:8080/ ** http://localhost:8080/james ** http://localhost:8080/microsvc-test
• The first and second URL will return a JSON response.
• The last URL will return a text response.

Create Files

• mkdir -p /data/vm/vagrant/kubernetes/01-cluster-prometheus/logs
• Copy the Vagrantfile, 1-microsvc-deployment.yaml, and 2-microsvc-ingress.yaml to /data/vm/vagrant/kubernetes/01-cluster-prometheus/

Start Kubernetes Cluster

• cd /data/vm/vagrant/kubernetes/01-cluster-prometheus/
• vagrant up
• wait for VMs to start. The Kubernetes cluster will start once the VMs are all running.

SSH Into Kubemster

• cd /data/vm/vagrant/kubernetes/01-cluster-prometheus/
• vagrant ssh kubemaster

Inject Envoy Proxy into Deployment

• cd /vagrant
• ls -ltr
• You should see the YAML files
• kubectl apply -f <(istioctl kube-inject -f /vagrant/1-microsvc-deployment.yaml)
• kubectl get pods
• You will see two pods that begin with "microsvc-test". Assume one of them is microsvc-test-845b49968-jnq84
• kubeclt describe pod/microsvc-test-845b49968-jnq84
• Replace the command above with the pod that is for your installation. Kubernetes will generate a random string after "microsvc-test". Make sure you see "Started container".

Create Ingress

• kubectl apply -f /vagrant/2-microsvc-ingress.yaml
• kubectl get ingress
• You should see an entry for microsvc-test. Notice the IP address. It should be a value like 172.16.0.131. The port should be 80.
• Visit the URLs below

** http://172.16.0.131/

** http://172.16.0.131/james

** http://172.16.0.131/microsvc-test