atrejomora / demo-app

Demo App for DT & k8s and misc.

Tanzu Observability demo-app

This is a polyglot demo app for showcasing Tanzu Observability.

TODO

1. Add UI repo link

Configure, Build, Package and Deploy

---

Configure

• Configure the deploy/src/values.sh file with your settings:

export K8S_NAMESPACE=tacocat
export K8S_APPLICATION=tacocat
export K8S_CLUSTER=cluster1
export K8S_LOCATION=americas
export K8S_REPOSITORY=192.168.1.8/demo-app

The above variables will be used by below scripts to fill in the values to setup the *.yaml files. K8S_REPOSITORY is the repository URL for container images which needs to be specified in order for the deployment to properly download the images.

• Generate the the yaml files

cd deploy/src
./cm.sh 
./create-yaml.sh

• cm.sh creates the 01-app-config-*.yaml files
• create-yaml.sh uses envsubst and values.sh to configure all of the *yaml files
• *Note: create-yaml.sh must be run before building the images as it also creates applicationTag.yaml files used by the services.

---

Build

• Build the Java services - from the root folder run:

mvn package

• Build the .Net service:

cd payments; dotnet build

• Build the Golang service:

cd inventory; make

---

Package

• Create docker images and push to registry.
• deploy/src/values.sh is referenced here to provide the repository.
• Build containers and push to your repository:

cd images; 
./all.sh

---

Deploy

cd deploy

• The yaml file are split into the deploy, namespace and services folders.
• This facilitates redeploying the apps in the deploy folder without changing the k8s service or namespace (easier redeploys).
• Deploy the namespace first:

kubectl apply -f namespace/

• Create the Wavefront proxy secret to hold the API key:

kubectl create secret generic  wf-token -n tacocat
kubectl edit secrets wf-token  -n tacocat

• Your secrets file should look something like this:

# Please edit the object below. Lines beginning with a '#' will be ignored,
# and an empty file will abort the edit. If an error occurs while saving this file will be
# reopened with the relevant failures.
#
apiVersion: v1
data:
  token: YOUR BASE64 ENCODED TOKEN HERE
kind: Secret
metadata:
  creationTimestamp: "2021-03-09T15:00:09Z"
  name: wf-token
  namespace: $K8S_NAMESPACE
  resourceVersion: "231537"
  selfLink: /api/v1/namespaces/tacocat/secrets/wf-token
  uid: dd60b398-0f3d-4d8c-8f49-017afbb70299
type: Opaque

• Now deploy the Wavefront proxy:

kubectl apply -f services/10_wavefront.yaml

• And now deploy the app and create the shopping service:

kubectl apply -f . 
kubectl apply -f service/19_shopping-service.yml

• To redeploy (but not delete the namespace or service):

kubectl delete -f . 
kubectl apply -f . 

---

That's it!

Please let use know how we can improve!