The following describes a demo that brings up a SimpleExampleServiceInstance. The purpose of this ServiceInstance is to host a single web inside of a Kubernetes container. Creating the SimpleExampleServiceInstance will cause a model policy to be invoked, which will create the necessary Kubernetes resources to launch the web server and configure it to host the desired page.

1. Set your username and password

USERNAME=admin@opencord.org
PASSWORD=letmein

2. Run the TOSCA recipe

TOSCA_URL=$(minikube service xos-tosca --url)
curl -H "xos-username: $USERNAME" -H "xos-password: $PASSWORD" -X POST --data-binary @SimpleExampleServiceInstance.yaml $TOSCA_URL/run

3. Wait a few seconds for the Kubernetes instances to be created.

4. View the status

CHAMELEON_URL=$(minikube service xos-chameleon --url)
python ./show-instances.py $CHAMELEON_URL $USERNAME $PASSWORD

5. View the web page Enter one of the other Kubernetes containers, any container such as one of the synchronizer containers will do, and perform a curl on the IP address obtained in step 4.

6. Ensure Kafka is running

helm repo add incubator http://storage.googleapis.com/kubernetes-charts-incubator
helm install --name cord-kafka --set replicas=1 incubator/kafka

7. Send an Event to update a web page Enter one of the other Kubernetes containers, install the kafka library (pip install kafka) and execute the follow python:

import json
from kafka import KafkaProducer
producer = KafkaProducer(bootstrap_servers="cord-kafka-kafka")
producer.send("SimpleExampleEvent", json.dumps({"service_instance": "My Simple Example Service Instance", "tenant_message": "Earth"}))
producer.flush()