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These materials are the copyright of John Wiley & Sons, Inc. and any dissemination, distribution, or unauthorized use is strictly prohibited. 38 Platform as a Service For Dummies, Special Edition In order to deliver on these advantages and make sure you get the competitive advantage you expect by moving to PaaS, your provider should answer the following questions: ✓ How do you integrate continuous integration and the overall application lifecycle management across the PaaS ✓ How will you ensure that my web application can scale How will you guarantee that my web application can take on an unanticipated increased load and still perform ✓ What’s your solution for auto scaling and high availability ✓ If one of your machines goes down, how will you ensure that end-user experience is uninterrupted and remains consistent ✓ What’s your plan for disaster recovery Do you support running in multiple regions so my application will automatically be supported in an alternative region if my base region is struck by a disaster ✓ How easy is it to use my favorite development frameworks during development, testing, and in production using the PaaS The PaaS may provide “native” support for some frameworks, but in any case, if not, needs to make it possible for you to use and make updates to the frameworks yourself. How do I coordinate updates of frameworks across multiple applications as both frameworks and applications evolve Understanding PaaS Services for Deployment The PaaS provider becomes your first line of defense when it comes to deployment and operational issues. Most PaaS providers have a dashboard for visualizing overall systems performance. You can use this tool to monitor whether your PaaS provider is up or down and is meeting its service level agreements (SLAs). Ideally, in a hybrid environment, you should look for a dashboard that gives you uniform visibility across your own resources and those of your PaaS provider. Some of the most important deployment services are covered in this section.
These materials are the copyright of John Wiley & Sons, Inc. and any dissemination, distribution, or unauthorized use is strictly prohibited. Chapter 4: Using PaaS as a Deployment Platform 39 Monitoring and notification services All aspects of the PaaS environment that may impact end-user performance need to be monitored. Security issues should be given the utmost attention by your PaaS environment. Your runtime environment needs as much security and protection as your development environment to support customer and suppliers. In order to monitor security, your PaaS provider (or the underlying IaaS provider) needs to scan networks, operating systems, and applications in order to prevent intrusion or denial of service attacks. In addition, you need to have sufficient insight into the monitoring capabilities to satisfy audit requirements. Load balancing and secure connection services Your PaaS provider needs to ensure that the load balancing service adequately supports your end-users regardless of how they access your application (desktop, mobile). You want assurance that your end-users are always routed over a secure channel to a live endpoint. Data management services Users of PaaS services need to trust that their provider maintains all service level agreements related to scalability and isolation of their data. Be confident that all requests for larger or additional instances, as well as any updates to your data, are isolated and visible only to you. The PaaS needs to provide you with the ability to share data among your own ecosystem (say, between your own applications) in addition to supporting isolation of the data from other tenants. Integrating with Existing Systems and Services The reality is that enterprises have substantial investments in existing services. Therefore, ensure that your PaaS provider
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