Background
How Can I Try Out Cloud Foundry?
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Install CF CLI
Deploy the Sample App
Now that you have the cf CLI installed and a Pivotal Web Services (PWS) account, you are really close to deploying the sample app.
This sample app is built with Spring Boot to get you up and running as quickly as possible.
Download the app with git:
git clone https://github.com/cloudfoundry-samples/cf-sample-app-spring.git
If you don’t have Git installed, you can download a zip file of the app at https://github.com/cloudfoundry-samples/cf-sample-app-spring/archive/master.zip
Navigate to the app directory:
cd cf-sample-app-spring
Sign in to PWS:
cf login -a https://api.run.pivotal.io
Push the app to PWS:
cf push
Open the sample app in your browser:
View the Logs
View a snapshot of recent logs:
cf logs cf-spring --recent
Or, stream live logs:
cf logs cf-spring
PCF provides access to an aggregated view of logs related to your application. This includes HTTP access logs, as well as output from app operations such as scaling, restarting, and restaging.
Every log line contains four fields:
- Timestamp
- Log type
- Channel
- Message
Press Control C to stop streaming.
Connect a Database
PCF enables administrators to provide a variety of services on the platform that can easily be consumed by applications.
List the available ElephantSQL plans:
cf marketplace -s elephantsql
Create a service instance with the free plan:
cf create-service elephantsql turtle cf-spring-db
Bind the newly created service to the app:
cf bind-service cf-spring cf-spring-db
Once a service is bound to an app, environment variables are stored that allow the app to connect to the service after a push, restage, or restart command.
Restart the app:
cf restart cf-spring
Verify the new service is bound to the app:
cf services
Scale the App
Increasing the available disk space or memory can improve overall app performance. Similarly, running additional instances of an app can allow an app to handle increases in user load and concurrent requests. These adjustments are called scaling.
Scaling your app horizontally adds or removes app instances. Adding more instances allows your application to handle increased traffic and demand.
Increase the number of app instances from one to two:
cf scale cf-spring -i 2
Check the status of the app and verify there are two instances running:
cf app cf-spring
Scaling your app vertically changes the disk space limit or memory limit for each app instance.
Increase the memory limit for each app instance:
cf scale cf-spring -m 1G
Increase the disk limit for each app instance:
cf scale cf-spring -k 512M
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