What you must know about cloud computing

Cloud platform introduction

1） Fundamentals of cloud computing

• 1. What is Cloud Computing
  The increase of Internet based related services , Usage and delivery model this model provides available , Convenient , On demand network access , Enter the configurable pool of computing resources
  These resources can be provided quickly , With little management effort or interaction with service providers, it usually involves providing dynamic, scalable and often virtualized resources through the Internet
• 2.IaaS
  IaaS（Infrastructure as a Service）, Infrastructure services
  The service provided to consumers is the use of all computer infrastructure , Including handling CPU, Memory , Storage , Networks and other basic computing resources , Users can deploy and run arbitrary Software , Including operating systems and Applications
  • IaaS There are usually three usages ： Public cloud , Private cloud and hybrid cloud
• 3.PaaS
  PaaS（Platform as a Service） Platform as a service
  Providing services based on the server platform or development environment becomes PaaS
  PaaS Services to be provided by the operator , It's not just a basic platform , It also provides technical support services for the platform , Even the application system for this platform can be developed , Optimization and other services . Simply speaking ,PaaS Platform refers to the application infrastructure services in the cloud environment , It can also be said that middleware is a service
• 4.SaaS
  SaaS（Software as a Service） Software and services , It's a kind of passing Internet Provide software patterns , Manufacturers deploy application software on their own servers , According to the actual needs of customers , Order the required application software services from manufacturers through the Internet
  Users don't have to buy software , It's renting from a provider based on Web Software for , To manage business activities , There is no need to maintain the software , Provide full management and maintenance software for the conference , At the same time, it also provides software offline operation and local data storage

2）Openstack brief introduction

1. What is? Openstack

Openstack It's a by NASA（ NASA ） and Rackspace Cooperative R & D and initiated projects ;
Openstack It's a set IaaS Solution
Openstack Is an open source cloud computing management platform
With Apache A license is an authorization

2. What is cloud

What is widely accepted at this stage is the American National Institute of standards and technology （NIST） Definition
Cloud computing is a pay per use model , This mode provides available , Convenient , On demand network access , Enter the configurable computer resource sharing pool （ Including the network , The server , Storage , Application software , service ）, These resources can be provided quickly , Only a small amount of management work is required , Or have little interaction with service providers

3. Three service modes of cloud computing

Software , application SaaS
platform , Running environment PaaS
infrastructure IaaS

4. Well known cloud service providers

Abroad ： Amazon AWS, Microsoft Azure,IBM SCE+ etc.
At home ： Hua Wei Yun , Alibaba cloud , Baidu cloud , Tencent, cloud, etc.

5. Cloud computing product purchase suggestions

Consider the popularity of the service provider , Reliability
Personally / Based on the actual needs of the enterprise
For example, virtual machine , database ,CDN, Safety, etc , Choose the one with the best cost performance

Hua Wei Yun （ECS Cloud Server Management ）

1. Huawei cloud product introduction

Elastic cloud server ECS（Elastic Compute Service）
Is a flexible and scalable computer service （ virtual machine ）, Help you lower IT cost , Improve operation and maintenance efficiency , Make you more focused on core business innovation

2. Key points of cloud server selection

Key points

• Billing method （ Every year, every month , Pay as you go ）
• specifications （CPU/ Memory / Hard disk ）
• Mirror image （Linux System ）
• Login mode （ Set password ）
• Billing method （ By bandwidth , By flow ）

3.ECS Basic operation

Basic management ： Turn it on , To turn it off , stop it , restart , Remote login
More operations ： Change configuration , Reshipment system , Change the system

4. Remote control ECs

Remote control protocol
RPD（ Port number 3389）, Apply to Windows The server
SSH（ Port number 22）, Apply to Linux The server , Firewalls and other devices
Commonly used SSH Management tools
PC End ：Xshell,SecureCRT,Putty etc.
Mobile terminal ：iTerminal,Termius, Alibaba cloud APP etc.

5. Create a website
Enable on the ECS web service
install httpd software package
The startup name is httpd System services , And set the power on to run automatically

Special notes
ECS Instances need to be opened web Service port
22 Linux Server remote control
80 General web services
443 Encrypted Web Services

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