Evaluating Cloudify

This section will assist you in evaluating Cloudify through the deployment of a simple web application.

Deploying a Simple Hello World Web Server

This procedure enables you to deploy a simple ‘Hello World’ Web server. You must have Cloudify CLI installed in order to run this evaluation process.

Now that you have installed Cloudify CLI, it is time to get a glimpse of what it can do. In this procedure you:


1. Downloading and Extracting the Blueprint

Use the following command to clone the repo and extract the installation.
$ git clone https://github.com/cloudify-examples/local-simple-python-webserver-blueprint.git
The process creates a directory called local-simple-python-webserver-blueprint.

2. Installing the Blueprint

Use the following commands to change directory and begin the install process:
cd local-simple-python-webserver-blueprint
cfy install blueprint.yaml

You should see the following output once done.
$ cfy install blueprint.yaml
Initializing local profile ...
Initialization completed successfully
Initializing blueprint...
Initialized blueprint.yaml

2017-03-28 10:53:01.736 CFY <local-simple-python-webserver-blueprint> 'install' workflow execution succeeded

3. Confirming the Application is Working

To confirm the application is working, try accessing it.

4. Optional: Retrieving Node Instances

Each logical entity in your application that is defined within a blueprint is a called a node. After a deployment is created, each logical node becomes a set of one or more node-instances, which are instances of that node. A node can have multiple node-instances, such as multiple virtual machines.

Run the following command to view each node that is defined in the blueprint, and its attributes. cfy node-instances list -b local-simple-python-webserver-blueprint

5. Optional: Retrieving the Installation Outputs

When you install a blueprint with Cloudify, a deployment is created. A deployment is a model of the application that will be modified over the Application lifecycle, including all of the node-instances and their runtime properties. A deployment also has outputs, which can be the IP addresses, ports, or other runtime-properties generated during Cloudify workflows, that you want to take and use somewhere else.

Run the following command to retrieve the outputs:
cfy deployments outputs -b local-simple-python-webserver-blueprint

6. Uninstalling a Deployed Blueprint

An uninstall workflow that enables you to uninstall the application.

To uninstall the application, run cfy uninstall -b local-simple-python-webserver-blueprint.
The following output is expected: $ cfy uninstall
2017-03-28 10:53:12.765 CFY <local-simple-python-webserver-blueprint> Starting 'uninstall' workflow execution

2017-03-28 10:53:15.154 CFY <local-simple-python-webserver-blueprint> 'uninstall' workflow execution succeeded

This completes the deployment of your first application. You have processed an entire application lifecycle workflow using Cloudify.

To try Cloudify in a hosted environment for more complex applications, check out the Cloudify Labs