create_deploy.md

Create and deploy an application

From Alien4Cloud menu Applications, click on New Application :

Provide an application name, WelcomeApp for example, and select the option to initialize the application from a Topology template and select the template welcome_basic as here :

Click on Create, the application is created :

Click on the Environment line framed in purple above, the application deployment wizard starts. Click on Topology to see the application template :

Here the compute node is associated to a network, so that during the application deployment, an IP address will be generated on-demand for the Compute Node on this network.

You see a green a on these components Network and Compute as these are abstract nodes with no implementation, that will be replaced by concrete implementations of on-demand resources once you will have selected the location where to deploy the application.

Go to the step Locations, and select the Google location:

Click on Matching, then Nodes matching and check that the abstract Compute Node that was defined in our topology, was matched against a Small compute on-demand resource of type yorc.nodes.google.Compute :

If we had specified in the abstract Compute Node in the topology that 2 CPUs are requested, then it is the Large compute on-demand resource that would have been selected.

You can also from this screen select Small compute and update this on-demand resource properties.

We will do it here to add a value to the property tag, setting a tag welcome:

This tag will be needed as we will deploy our Web Server application on a Google Compute instance, using port 8111. By default this port is not open to the external world. And it is possible to create a firewall rule in Google Cloud to specify instances with a given tag expose a given port.

For example this Google Cloud CLI rule expose ports 8111 on all Compute instances having the tag welcome :

gcloud compute firewall-rules create welcome-demo \
         --allow tcp:8111 \
         --target-tags welcome

Now that you have added this tag to the Compute instance to create on demand, click on Review and deploy, you are ready to deploy the application on Google Cloud:

Click on Deploy to deploy the application.

Once deployed, click on info on the left hand side, and you should see details on the deployed application, like the URL on which you can click to check the deployed Web Server is up and running showing a Welcome message.

Next step is about troubleshooting an application deployment failure