On Cloud Computing Technology Principles and Architecture

As the cloud computing is divided into three types: IaaS, PaaS and SaaS, different manufacturers provide different solutions. At present, there is not a unified technical architecture, which blocks the reader's understanding of the principle of cloud computing. To this end, this article integrated programs from different manufacturers to construct a questionable cloud computing architecture. The architecture shown in Figure 3, which outlines the main features of different solutions, each of which may only achieve some of these features, and perhaps also some of the relatively minor features have not been summarized.

Cloud computing technology architecture is divided into 4 layers: physical resource layer, resource pool layer, management middleware layer and SOA building layer, as shown in Figure 3. The physical resource layer includes computers, storage, network facilities, databases and software. The resource pool layer is a resource pool that forms a large number of same types of resources into homogeneous or near-homogeneous resources, such as a computing resource pool and a data resource pool. Building a resource pool is more the integration and management of physical resources, for example, how to fit 2,000 servers in a standard container space to solve the problem of cooling and faulty node replacement and reduce energy consumption. The management middleware is responsible for cloud computing Resource management and scheduling of many application tasks, so that resources can efficiently and safely provide services for applications. The SOA building layer encapsulates the cloud computing capabilities into a standard Web Services service and incorporates it into the SOA system for management and use, including Service registration, finding, accessing and building service workflows. Management middleware and resource pooling are the key pieces of cloud computing technology, and the capabilities of the SOA building layer are more dependent on external facilities.

Cloud computing management middleware is responsible for resource management, task management, user management and security management. Resource management is responsible for balancing the use of cloud resource nodes, detecting node failures and trying to recover or block them, and monitoring the usage of resources. Task management is responsible for executing tasks submitted by users or applications, including completing user task images ) Deployment and management, task scheduling, task execution, mission lifecycle management, etc .; user management is an essential part of cloud computing business model, including the provision of user interface, management and identification of user identity, create user programs The implementation of the environment, the use of billing users, etc .; security management to ensure the overall security of cloud computing facilities, including identity authentication, access authorization, comprehensive protection and security audit.

Based on the above architecture, this paper takes IaaS cloud computing as an example to briefly describe the implementation mechanism of cloud computing, as shown in Figure 4.

User interaction interface to the application to provide access to Web Services interface, access to user needs. The service catalog is a list of services that users can access. System management module is responsible for managing and allocating all available resources, the core of which is load balancing. The configuration tool is responsible for preparing the task runtime environment on the assigned nodes. The monitoring statistics module is responsible for monitoring the running status of the node and completing the statistics of the user using the node. The implementation process is not complicated: The user interface allows the user to select and invoke a service from the directory. After the request is passed to the system management module, it will assign the appropriate resources to the user and then invoke the configuration tool to prepare the environment for the user.

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