module-9.2-setup-redis-ha-demo-app.md

Module 9.2 - Setup Redis HA Demo App (Hipstershop)

Uninstall previous manifests

If the Hipstershop microservices demo application was installed in Module 6, let's clean it up before creating the application manifests for this demo to save on compute resources.

Assuming you are in the right cluster context, run:

kubectl delete -f demo-apps/20-hipstershop-app.yaml

Install Redis HA Hipstershop manifests

• Select one of the clusters to install the Hipstershop manifests to and switch to that K8s context

  For example:

  kubectl config get-contexts
  kubectl config use-context <context-name>

• Source the redis-ha/setup.env variables in order to substitute the REAADB_NAME local cluster database service into the manifest for the cartservice Deployment to point to.

  source redis-ha/setup.env

• Then substitute the values into the manifest and deploy onto the cluster

  sed -e "s?<REAADB_NAME>?$REAADB_NAME?g" \
    -e "s?<INSTALL_NAMESPACE>?$INSTALL_NAMESPACE?g" \
    -e "s?<REAADB_PORT>?$REAADB_PORT?g" \
    demo-apps/21-hipstershop-app-redisha.yaml | kubectl apply -f -

• Apply the network policies manifest for miorosegmentation between the different services and also to allow traffic to the Redis-deployed namespace by substituting the values into the manifest:

  sed -e "s?<INSTALL_NAMESPACE>?$INSTALL_NAMESPACE?g" \
    federated-policy/cluster-2-policy/05-msg-redisha.yaml | kubectl apply -f -

• Check that all the pods are up

  kubectl get pod -A -l zone=app2

  NAMESPACE               NAME                                     READY   STATUS    RESTARTS   AGE
  adservice               adservice-698ff9d8f8-88fhn               1/1     Running   0          4m50s
  cartservice             cartservice-7fc64f54d6-wf748             1/1     Running   0          4m51s
  checkoutservice         checkoutservice-6f799cb76f-phn5l         1/1     Running   0          4m52s
  currencyservice         currencyservice-79c4c96966-kbtrd         1/1     Running   0          4m51s
  emailservice            emailservice-6669f5bdbb-n5m85            1/1     Running   0          4m52s
  frontend                frontend-7c8d49d679-pvmkd                1/1     Running   0          4m52s
  loadgenerator           loadgenerator-648c7bc867-b65wm           1/1     Running   0          4m51s
  paymentservice          paymentservice-865bd6f586-2clx8          1/1     Running   0          4m51s
  productcatalogservice   productcatalogservice-5675dbc7d6-b488z   1/1     Running   0          4m51s
  recommendationservice   recommendationservice-5f4c4bd7c5-qkxpf   1/1     Running   0          4m52s
  shippingservice         shippingservice-5559f5655b-t2fjs         1/1     Running   0          4m51s

• Check that the cartservice pod is using the local REAADB service:

  kubectl describe pods -n cartservice $(kubectl get pod -n cartservice -l app=cartservice -ojsonpath='{.items[0].metadata.name}') | grep REDIS_ADDR 

  REDIS_ADDR:  reaadb-testdb.redis:11069

• Check that the frontend-external LoadBalancer service got provisioned:

  kubectl get svc -n frontend frontend-external

  NAME                TYPE           CLUSTER-IP      EXTERNAL-IP                                                                     PORT(S)        AGE
  frontend-external   LoadBalancer   172.21.149.62   a251g801ef5ah4mma8zq7d110ou3j215-4f05ea16f334e601.elb.us-east-1.amazonaws.com   80:30155/TCP   6m57s

• Check that you can access the Hipsterhop UI in a browser using the LoadBalancer svc URL

• Test the application flow:

  • Click on items
  • Add to Cart
  • Place Order

➡️ Module 9.3 - Test Redis HA Demo App (Hipstershop)
⬅️ Module 9.1 - Setup Redis HA Database

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