ctsjc / 2023

Create Docker Image

docker build -t iamjc321/msv01:latest . 
docker login -u iamjc321 docker.io
docker push iamjc321/msv01:latest

Foundations

Create Namespace

kubectl create namespace NAME

Set Automatic Istio configurations to namespace

kubectl label namespace dev2023 istio-injection=enabled

Create

Run All

kubectl apply -f msv01.yaml -f msv02.yaml -f istio.yaml

Create a pod with curl and make a request to other pods from it

kubectl run curl-j --image=radial/busyboxplus:curl -i --tty --rm

Delete

kubectl delete deployment msv01 -n dev2023

kubectl delete svc msv01 -n dev2023

kubectl delete deployment msv02 -n dev2023

kubectl delete svc msv02 -n dev2023

kubectl delete gateway msv02

kubectl delete virtualservice msv02

kubectl label namespace dev2023 istio-injection

Get

Check services in namespace

kubectl get svc -n dev2023

Find IP of gateway

Check Istio

istioctl analyze -n dev2023

Use the following command to access the Kiali dashboard:

istioctl dashboard kiali

Get logs

kubectl logs deployment/<name-of-deployment> # logs of deployment
kubectl logs -f deployment/msv01 -n dev2023

Operations

Run commands in running pod

kubectl exec --stdin --tty msv01-5cfb69ffdb-wqchx -n dev2023 -- ls /
kubectl exec --stdin --tty msv02-6cc57f9f78-hqh9h -n dev2023 -- wget localhost:8081/portfolio/

Run Curl

kubectl run curl-j --image=radial/busyboxplus:curl -i --tty --rm

Make a call from ingress

#Get IP Address of Gateway
kubectl get svc istio-ingressgateway -n istio-system

#Use IP to make call to internal service, <gateway-ip>:<gateway-port>/<kub-service>/<endpoint>
curl http://10.43.108.251:80/search/iscall

Example

Spring Service

apiVersion: apps/v1
kind: Deployment
metadata:
  name: msv01
  namespace: dev2023
spec:
  replicas: 1
  selector:
    matchLabels:
      app: msv01
  template:
    metadata:
      labels:
        app: msv01
    spec:
      containers:
        - name: msv01
          image: iamjc321/msv01:1.0.4
          imagePullPolicy: Always
          ports:
            - containerPort: 8081
          env:
            - name: PORTFOLIO_URL
              value: http://msv02:8081/portfolio
---
apiVersion: v1
kind: Service
metadata:
  name: msv01
  namespace: dev2023
spec: 
  ports:
  - port: 8082
    targetPort: 8082
    protocol: TCP
    name: http
  selector:
    app: msv01