Knowledge of Virtual technology

Virtual machine installation Uses

Learn Linux then we will have a Linux, how to have a Linux, in their own notebook to install a Linux, we on the Linux Not a lot of knowledge, the abrupt change of the system to Linux is a very serious problem. I put a linux on my laptop and made up mymind to use Linux all the time,but 7 days later, my enthusiasm was extinguished by the complexity of Linux usage and the scarcity of software. 工欲善其事, its prerequisite. The virtual machine will be the golden cudgel of our future, the Demons and ghosts will be admire in our great.

1What is a virtual machine

a virtual machine is an operating system running within a virtual platform.

So what is a virtual platform? A virtual platform is a simulator running on an operating system or hypervisor that simulates one or more sets of computer hardware. Then we can install an operating system on the emulated hardware, which is called the virtual machine.

There are many types of virtual platforms, and here I follow the different classifications of the running platforms (here I only cite some common virtual platforms, in fact I only know so much):

1 running on Windows :Hyper-V this is Windows Corporation;Virtulbox was originally an open source virtual machine software, originally a particularly powerful virtualization platform, Later by a oracel acquisition, perennial does not update has been marginalized, it still has a very powerful function is to specify the video memory; the next is the current personal use of particularly frequent vmwear, it has a very powerful accelerated compilation function.

2 running on Linux :vmwear He is a cross-platform virtualization software; KVM is based on a genius-written set of virtualization packages that QEMU organizes;Xen is a more wonderful virtual software, personal research is relatively small, and comparative edge.

3 running on mac :vmwear Company's vmware Fusion;Virtulbox.

there is a more wonderful virtual software Docker, virtualization container, it is mainly used in server clusters, mainly for automated deployment, continuous integration and micro-services, particularly tall, learned not to suffer.

2Why use a virtual machine

The reason why we use virtual machines is because we are in the learning stage, many operations are experimental, and a slight carelessness may cause the system to crash. Every time the system crashes it takes a long time to recover the system and install the software, which will result in a lot of our time being wasted. Can virtual machines allow us to reduce these time costs? Well,the Vmmear virtual machine has a particularly powerful feature, snapshot. As the name implies to take a picture of the virtual machine installed in the Vmwear, when the system is broken, we can return to the location of the snapshot. Snapshot not only this one function, there is a more powerful function, that is, cloning, based on this snapshot and then create a virtual machine, we will not be repeated installation of the same operating system, save a lot of time.

3usage Scenarios for virtual machines

There are a few places I know about virtual machine usage scenarios:

1vmwear,openstack,mesos,kubuern,kubernetes,Swarm and other cloud computing platforms, They are mainly large companies to deploy their own services require a large number of computers, the demand for this computer is often up to thousands of this order of magnitude, and a company's operation and maintenance personnel only about ten people, which means that a person to manage the Computer, a hardware maintenance is obviously unrealistic, and a large number of servers are implementing the same function, "snapshot" function does not exactly apply. Of course, it takes a lot of high-powered technology to manage so many computers and install virtual machines on them, which is not a table.

2 There is the cloud desktop, I have been engaged in the work of the cloud desktop, the main technology has Ovirt and vmwear based on many features of Windows Server. The main principle is to create a virtual machine in the server and then connect the virtual machine using the small box with the connector installed. Cloud Desktop pros and cons write a high-energy blog, on the 51cto blog home Page Oh ... Address:http://oldking.blog.51cto.com/10402759/1826968

3 The last is the virtualization platform Vmwear,Virtulbox and so on that you learn Linux or want to use other platform software .

4How to use a virtual machine

Here is a brief introduction to the virtualization Platform Vmwear Workstation Pro, which is used by individual learners .

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5Note

1) Centos6.8 Monitor cannot be specified as relatively small, I have ever adjusted to the minimum 640x480 resulting in the system not powering on.

2) when virtulbox and vmwear are installed simultaneously, it will cause the Vmwear bridge modeto be used, the net mode can be used, the other is not tested, The problem was properly judged and dealt with.

6Summary

using virtual machines is a must for beginners, and virtual machines help us to minimize the impact of error operations.

This article is from "Lao Wang Linux Journey" blog, please be sure to keep this source http://oldking.blog.51cto.com/10402759/1871448

Knowledge of Virtual technology