Intro to Pivotal Cloud Foundry

Transcript

1. Pivotal Cloud Foundry A Developer’s Perspective
2. Cloud Computing
3. What is Cloud Foundry? • Cloud Foundry is a open source PaaS software. • Cloud Foundry is a platform for developing and running cloud applications. • 12 Factor Apps (http://12factor.net)
4. What is Cloud Foundry? • Works with many languages and frameworks. • A platform that allows you to automatically provision resources. • Enables continuous integration/ continuous delivery. • Allows you to focus on writing cloud native applications.
5. Languages Supported • Java - Grails, Play, Spring, or any other JVM-based language or framework • Ruby - JRuby, Rack, Rails, or Sinatra • Node.js - Node or JavaScript • Binary • Go • PHP - Cake, Symfony, Zend, Nginx, or HTTPD • Python - Django or Flask • Staticfile - HTML, CSS, JavaScript, or Nginx
6. What is Pivotal Cloud Foundry? • Pivotal Cloud Foundry is a reference implementation of Cloud Foundry for the enterprise. • Open source software provides the basis for the Pivotal Cloud Foundry platform. • Pivotal offers additional commercial features, enterprise services, support, docs, certs, etc.
7. Cloud Foundry vs PCF • PCF is easier to install • Has nicer web GUI. • Additional features like auto-scaling, LDAP/AD (SAML) support, metrics server, notifications, Ops Metrics. • Many of the services come installed by default (MongoDB, Neo4J, RabbitMQ, Redis, etc). vs
9. Pivotal Web Services (PWS) • Hosted version of PCF. • Exactly the same user experience / features. • Register for a free trial account. • http://run.pivotal.io • (Recommend using Chrome)
18. Organization Spaces Logical way of organising users and resources
22. Using PCF • Mainly interface using the Command Line Interface (CLI) • Download the CF CLI here: https://console.run.pivotal.io/2/tools • Alternative download: https://github.com/cloudfoundry/ cli#downloads
24. Installation (Windows) • Unzip and copy cf to C:\windows • Add the following environment variables: • CF_HOME=C:\Users\<your_AD_user_id>\ • https_proxy=http:// <your_AD_user_id>:<your_AD_password>@proxy.singaporepower.com.sg:8080 • Example: • CF_HOME=C:\Users\PMCC749I\ • https_proxy=http://PMCC749I:$ecreT123@proxy.singaporepower.com.sg:8080
25. Login to PWS • Start Terminal ( + R, type ‘cmd’) • cf -v (gets version) • cf help (gets list of commands) • cf help <command> • cf login -a api.run.pivotal.io • cf target (find out which server) • You will be prompted for your Email and Password.
26. Create a PHP App • cd \Users\<your_user_id>\ • mkdir demo • cd demo • notepad index.php
27. Publish App • cf push <app_name> • eg. cf push sp-miccheng-demo1 • Visit the website: http://<app_name>.cfapps.io • eg. http://sp-miccheng-demo1.cfapps.io
32. What happens when you cf push? 1. Files in folder / local build artefacts are uploaded to CF (PWS). 2. Auto detection of type of apps you are deploying, appropriate buildpack is installed and a “droplet” (Cloud Foundry unit of execution) is build. 3. Droplet build in a staging area and stored in blob store. 4. Droplet is deployed to droplet execution agent and application is started (route is allotted).
33. Buildpacks • Buildpacks are used to detect the type of application you are deploying. • It sets up the the proper execution environment on Cloud Foundry. • Only used during the build / staging time - not in the running app. • See available buildpacks: cf buildpacks
34. Hostname & Domains • All CF apps use a shared domain by default (eg. cfapps.io). • When we deploy an app, we also declare a hostname (eg. sp- miccheng-demo1). • The combo and hostname + domain = route • Hostname can be configured in CLI or manifest.yml. • You can also add custom routes manually to apps.
35. Application Start Command • Each buildpack has a default command to start your application. • To override default start command: • cf push my-app -c “node server.js” • To reset to the buildpack start command: • cf push my-app -c “null”
36. Deployment Manifest • Application manifests tell cf push what to do with applications. • This includes everything from how many instances to create and how much memory to allocate to what services applications should use. • YAML format. • Online Generator: http://cfmanigen.mybluemix.net
37. Scaling a CF app • Horizontal scaling - adding more instanced • cf scale <app_name> -i <number_of_instances> • Vertical scaling - adjust disk space limit and memory limit • cf scale <app_name> -k 512M • cf scale <app_name> -m 1G
38. Scaling Horizontally • cf push <app_name> • cf scale -i 2
39. Environment Variables • Application configurations as environment variables. • How CF runtime communicates with a deployed app about the environment. • cf env <app_name> • Use the manifest file to add environments. • You can also set using CLI: cf set-env OMG “oh my god”
40. Using Services • View what kinds of services are available • cf marketplace • Creating a service instance • cf create-service <service> <plan> <service_instance> • Example: cf create-service elephantsql turtle miccheng-db
41. Using Services • See created services: cf services • See details of a service: cf service <service_instance> • Bind service instance to app instances: • cf bind-service <app_name> <service_instance> • This will add env variables to the app instances.
42. Logs / Events • Tailing logs: cf logs <app_name> • Recent logs: cf logs <app_name> --recent • Logs can be drained to external log aggregators (eg. PaperTrail, Splunk) • Significant System Events: cf events <app_name>
43. Login to app container • All apps run in a linux container (LXC) • You can SSH into the container if you need to take a look at what’s going on (eg. troubleshooting, verify file version, etc) • cf ssh <app_name> -i <instance_number>
44. Hands-On https://github.com/miccheng/rails-guestbook-demo
45. More things… • User-provided services - enable developers to use services that are not available in the marketplace with their applications running on Cloud Foundry.
 (Reference: http://docs.pivotal.io/pivotalcf/1-7/devguide/services/user-provided.html) • Managed Services for Cloud Foundry - services integrated with Cloud Foundry via APIs, and enable end users to provision reserved resources and credentials on demand.
 (Reference: http://docs.pivotal.io/pivotalcf/1-7/services/index.html)
46. Q&A
47. Michael Cheng @CoderKungfu michaelccm@singaporepower.com.sg