VMware entry-vsphere ARCHITECTURE AND PRELIMINARY ANALYSIS

Vsphere is a complete set of software, including VMWare ESX/esxi, vcenter server, and vsphere client.

ESX/esxi is installed on the physical host and runs on the virtual machine. ESX/esxi is a Linux-based software system and does not contain image operation interfaces. Therefore, it is equipped with vsphere client software for user operation, vsphere client and ESX/esxi are connected through the Network C/S architecture, and vsphere client is installed and run on Windows system. netframeworkProgram.

 

With the increase of ESX/esxi deployment, to facilitate management and interaction with different ESX/esxi, A vcenter server is developed. This is a server software and each ESX/esxi reports to it, the software does not contain image operation interfaces. Therefore, a graphical client is required, so vsphere client has another function, it can be used as the client graphical UI of the vcenter server.

 

That is to say, the vspher client can be used as either an ESX/esxi client ui or a vcenter Server Client UI. The two methods are as follows:

 

 

(1) vsphere client ------------------------------------ one ESX/esxi

 

(2) vsphere client ------------------------------------- one vcenter server ------------ multiple ESX/esxi instances

 

Vmwareworkstation, a desktop virtualization software, integrates Virtual Machine Management and GUI.

 

When you first install vsphere, The vsphere client and vcenter server are installed on the OS of the physical machine. After the deployment, you can deploy them on the OS of the virtual machine running ESX/esxi. Vcenter server stores a lot of configuration data of each ESX/esxi and virtual machines running on it, stored in SQL Server or Oracle database. For security, it is best to adopt backup policies for these databases.

In addition, if the physical machine is damaged (especially when the storage of the virtual machine is installed), the ESX/esxi running on it and the virtual machine cannot work, which will cause a big problem, therefore, files stored in virtual machines must be stored in secure locations, such as NAS and San, which must be backed up frequently. As long as these files are not damaged and the physical machine breaks down in time, you can also migrate the virtual machine to another physical machine for running. This is also one of the advantages of virtualization.