scaling

Lab: Manager Scaling

The purpose of this lab is to deploy and scale an example web application.

We are going to use the "Hello World" application that is already available on the CLI VM under ~/hello-world.

Step 2: Prepare inputs file

cd ~/work
cp ~/cloudify-training-labs/scaling/inputs.yaml.template scaling-inputs.yaml

Then edit the file scaling-inputs.yaml for the appropriate values.

Step 3: Deploy the application

cfy blueprints upload -b appscale -p ~/cloudify-hello-world/openstack-scaling-blueprint.yaml
cfy deployments create -d appscale -b appscale -i scaling-inputs.yaml
cfy executions start -w install -d appscale -l

This will upload the blueprint, create a deployment, and execute the deployment's install workflow. By default, this will instantiate one instance (with a public IP) and expose port 8080/HTTP to show a Cloudify example web page.

Step 5: Scale the application

cfy executions start -w scale -p 'delta=1,scalable_entity_name=vm_and_ip' -d appscale -l

This will execute the deployment's scale workflow which will, in turn, scale the application to 2 instances (from 1 instance). The delta parameter determines by how much to scale an application. This will also give each new instance its own public IP address.

To scale back an application, simply use a negative number for the delta parameter:

cfy executions start -w scale -p 'delta=-1,scalable_entity_name=vm_and_ip' -d appscale -l

Step 6: Cleanup

cfy executions start -w uninstall -d appscale -l
cfy deployments delete -d appscale
cfy blueprints delete -b appscale