TheSaffaGeek

My ramblings about all things technical

VCAP-CID Objective 1.1 – Create a Conceptual Design Based on Business Requirements

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Due to an imminent customer engagement I am due to be working on I have been refining my vCloud skills and dusty away the cobwebs. One of these tasks was to book the VCP5-IaaS and sit it so that it forced me to learn the basics again and be sure I had a solid base knowledge with no gaps. My experience of the exam and the resources I used for it are mentioned in my VCP5-IaaS Exam Experience blog posting. I have now been using the VCAP-CID blueprint as a structure for perfecting my vCloud design skills and so I thought I would slowly post up each objective for my own benefit but also hopefully help other people looking to take the VCAP-CID. I will be consolidating all the objectives on my blog page here

Skills and Abilities

  • Distinguish between virtualization, automation and cloud computing.

    • This could be defined in a number of ways (I’m more than happy to be corrected here) but the way I piece it all together is:
      • Virtualization is what VMware has been doing for years with vSphere and its complementing technologies. This is nothing new to anyone preparing for this exam and if it is then I hate to tell you this but this exam isn’t for you.
      • Automation ties perfectly into the NIST definition of on-demand self-service which is :  Unilaterally provision computing, as needed, automatically without requiring human interaction
        • This can be done through multiple technologies and mechanisms like VMware’s vCenter Orchestrator, vCAC,vFabric Application Director and third party tools like Puppet, Razor and IBM’s Virtualization Automation solution. Without true automation you can’t have a Cloud.
      • Cloud computing is perfectly defined by the industry recognised NIST cloud requirements which are:
        • On-demand self-service: Unilaterally provision computing, as needed, automatically without requiring human interaction
        • Broad network access: Capabilities are available over the network and accessed through standard mechanisms
        • Resource pooling: The provider’s computing resources are pooled with virtual resources dynamically assigned and re-assigned according to consumer demand.
        • Rapid elasticity: Capabilities can be rapidly and elastically provisioned, in some cases automatically, to quickly scale out and be rapidly released to quickly scale in.
        • Measured service: Cloud systems automatically control and optimize resource use by leveraging a metering capability. Resource usage can be monitored, controlled, and reported providing transparency of the utilized service.
      • For VMware’s IaaS definition from which they define the VMware vCloud blueprint is:
        • A cloud must be built on a pooled, virtual infrastructure. Pools include not only CPU and memory resources but also storage, networking, and associated services.
        • The cloud should provide application mobility between clouds, allowing the consumer to enter and leave the cloud easily with existing workloads. The ability to use existing consumer tools to migrate workloads to or from the cloud is highly desirable. Mobility of workloads between clouds requires cross-cloud resource management.
        • The cloud should be open and interoperable, allowing the consumption of cloud resources over open, Internet-standard protocols. Access to cloud resources does not require any other specific network protocols or clients.
        • Cloud consumers should pay only for resources they consume or commit to consuming.
        • The cloud should be a secure, trusted location for running cloud consumer workloads.
        • Cloud consumers should have the option and the ability to protect their cloud-based workloads from data loss.
        • Cloud consumers are not responsible for the maintenance of any part of the shared infrastructure and do not need to interact with the cloud provider to maintain the infrastructure. They are not responsible for storage and network maintenance, ongoing cloud infrastructure patches, or business continuity activities. The cloud should be available to run high-availability workloads, and any faults occurring in the cloud infrastructure should be transparent to cloud consumers as a result of built-in availability, scalability, security, and performance guarantees.
  • Distinguish between private, public, hybrid and community cloud computing.

    • These are defined perfectly in the vCAT 3.1 introduction document as:
      • Private cloud: A private vCloud (also known as an internal vCloud.) operates on private networks, where resources are accessible behind the firewall by a single company. In many cases, all the tenants share one legal entity. For example, a university might offer IaaS to its medical and business schools, or a company might do the same for various groups or business units. The private vCloud can be managed by the enterprise and hosted on premise or operated on a dedicated infrastructure provided by a vCloud service provider or systems integrator. In any case, a private vCloud must conform to the organizational security constraints.
      • Public cloud: A public vCloud offers IT resources as a service through external service providers and is shared across multiple organizations or the Internet. This can be viewed as a vCloud infrastructure that is operated by one organization for use by multiple, legally separated organizations. A public vCloud is provisioned for open access and might be owned, managed, and operated by one or more entities. A public vCloud provider might also support a private, community, or hybrid vCloud.
      • Hybrid cloud: A hybrid vCloud combines the benefits of the private and the public vCloud, with flexibility and choice of deployment methods. A hybrid vCloud consists of multiple, linked vCloud infrastructures. These distinct vCloud infrastructures can be private, community, or public, they but must meet a set of requirements defined by the providers and agreed to by the consumers. Connecting these vCloud instances requires data and application mobility as well as management. When load-balancing between vCloud instances (cloud bursting), use a consistent monitoring and management approach when migrating an application or data workload.
      • Community cloud: A Community vCloud is a specific public vCloud use case where the cloud is shared, and typically owned, by a group of organizations with a common set of requirements. In many cases, the organizations also include some level of legal separation. Community vCloud resources are shared, with some parts under central control and other parts with defined autonomy. A vCloud built for government, education, or healthcare might be an example of a community vCloud. A community vCloud can be offered by a traditional service provider, by a member of the community, or by a third-party vendor and hosted on one or more sites. It can be placed on-premise at one or more of the organizations’ sites, off-premise at a vCloud provider site, or both on- and off-premise.

 

  • Analyze a customer use case to determine how cloud computing can satisfy customer requirements.

    • For this I would recommend you read the Service Definitions document from the vCAT as this covers all the definitions and how they map to customer requirements and fulfil these requirements. Also the VMware vCloud Implementation Examples document also from the vCAT shows you how varying implementations can benefit businesses in differing ways

 

  • Given a customer use case, determine the appropriate cloud computing model.

    • This is one I feel you can only do once you have a firm understanding of the capabilities of all the different Cloud offerings and how each of them meet varying requirements and also have differing constraints/disadvantages.
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