This project contains one simple micro-service that gets deployed:

• as a Cloud Foundry application,

• as a container in a Kubernetes cluster,

• and as a Cloud Functions action.

  

Watch this Youtube video that walks you through the deployment of the service and test the behavior of the deployment options when the service crashes:

• An IBM Cloud account. Either sign up, or use an existing account.

The micro-service used in this project computes Fibonacci numbers.

From Wikipedia: In mathematics, the Fibonacci numbers are the numbers in the following integer sequence, called the Fibonacci sequence, and characterized by the fact that every number after the first two is the sum of the two preceding ones:

0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, ...

The implementation of the Fibonacci sequence is done in service/lib/fibonacci.js. The same implementation is used across all deployment options.

1. Identify an IBM Cloud region, Cloud Foundry organization and space where to deploy the services.

2. Create a standard Kubernetes cluster

3. Create a registry namespace

And then

1. Select the GitHub box.

   1. Decide whether you want to clone or fork the repository.
   2. If you decide to Clone, set a name for your GitHub repository.

2. Select the Delivery Pipeline box.

   1. Specify the IBM Cloud API key to use or create one
   2. Select the region, organization and space where you want to deploy the web application. A random route will be used for the application. :warning: Make sure the organization and the space have no space in their names.
   3. Select the Kubernetes cluster where to deploy the service, together with the Docker registry name where to store the Docker image

3. Click Create.

4. Select the Delivery Pipeline.

5. Wait until all stages complete.

6. Open the Deploy log for the CLOUD FOUNDRY, CLOUD FUNCTIONS and KUBERNETES stages. Each log has a link at the end pointing to the location where the services have been deployed. Click on the links to add the service to the visual tester.

7. The services are ready. Review the Service API to call the services.

Once deployed, the service implements 3 API calls:

• compute the Fibonacci number after n iterations,
• let the computation run for t milliseconds,
• and simulate a crash of the service.

Depending on which compute option you are using, use the following cURL calls:

The Cloud Functions action is deployed as a zip action where several files are packaged into a zip file and the zip file is passed to Cloud Functions as the implementation for the action. deploy.js takes care of packaging the zip file.

Under the tester directory is a simple web application to register and test the deployed micro-services. It can be pushed to IBM Cloud with cf push or simply executed locally with python -m SimpleHTTPServer 28080 as example.

Please create a pull request with your desired changes.

Use

ibmcloud cf logs fibonacci-service

to look at the live logs for the web application.

Use

kubectl proxy

and look at the status of the resources in the console.

Use

ibmcloud cloud-functions activation poll

and perform an invocation of the action.

See License.txt for license information.