ECS 7-day practical training camp first day

Brief introduction

Cloud server is to upgrade a fixed configuration server to a cloud server that can be adjusted at any time. Using cloud server ECS is as convenient and efficient as using water, electricity, gas and other resources. You don't need to purchase hardware equipment in advance. Instead, you can create the required number of ECS instances of cloud servers at any time according to business needs. You can expand disk capacity and increase bandwidth at any time. If the cloud server is no longer needed, resources can be released at any time, saving costs.

Traditional and cloud services

Traditional server:
Not only is the price high, the purchase cycle is long, the resource waste rate is high, and the maintenance investment is high, but you also need a temperature-controlled computer room;
a secure network environment, such as a router and a firewall; a UPS; a The bandwidth to ensure the smooth operation of the server; there is a high-tech operation and maintenance engineer serving them; these things are actually far beyond the scope of personal ability!
Choosing cloud services can avoid this problem

Alibaba Cloud ECS server

No need to build a computer room, no need to purchase and configure hardware facilities. Delivery within minutes, rapid deployment, and shorten the application launch cycle.
Quickly access data centers and BGP (Border Gateway Protocol) computer rooms deployed around the world.
Cost is transparent, used on demand, and supports the expansion and release of resources at any time according to business fluctuations.
Provide heterogeneous computing servers such as GPU and FPGA, flexible bare metal servers, and general x86 architecture servers.
Support access to other Alibaba Cloud services through the intranet to form a rich industry solution and reduce the cost of public network traffic.
Provide multiple security solutions such as virtual firewall, role authority control, intranet isolation, anti-virus attack and traffic monitoring. Provide a performance monitoring framework and active operation and maintenance system.
Provide industry common standard API to improve ease of use and applicability

Why use Alibaba Cloud Server ECS?

Compared with ordinary IDC computer rooms or server vendors, the cloud server ECS provided by Alibaba Cloud has the following advantages:

Is Alibaba Cloud Server ECS easy to use? Before using ECS, you need to understand the following concepts:

Example: An ECS instance of a cloud server is equivalent to a virtual machine, including the most basic computing components such as CPU, memory, operating system, network, and disk. You can easily customize and change the configuration of the instance. You have complete control over the virtual machine. The difference from your local server is that you only need to log in to Alibaba Cloud to use the cloud server for independent management, top-level configuration and other operations.
Instance specifications: refer to the different configurations of the instance, including the number of vCPU cores, memory, and network performance. The instance specification determines the computing and storage capacity of the ECS instance.
Mirror: refers to the template of the ECS instance operating environment, generally including the operating system and pre-installed software. The operating system supports a variety of Linux distributions and different Windows versions.
Block storage: including elastic block storage based on distributed storage architecture, and local storage based on local hard disks of physical machines. Snapshot: refers to the data backup of a block storage at a certain point in time.
Network types: Including:
Proprietary network: An isolated network environment based on Alibaba Cloud, with complete logical isolation between proprietary networks.
Classic network: unified deployment in the Alibaba Cloud public infrastructure, planning and management by Alibaba Cloud.
Security group: consists of instances that have the same protection requirements and trust each other in the same region. It is a virtual firewall used to set up network access control for different instances.
SSH key pair:
The authentication method for remote login to Linux ECS instance. Alibaba Cloud stores the public key. You need to keep the private key properly. You can also choose to log in to the Linux ECS instance using username and password authentication.
IP address: Including intranet IP or private IP for intranet communication, and public IP for accessing the Internet.
Elastic public IP: A static public IP address that can be repeatedly bound or unbound with the instance.
Region and Availability Zone: Refers to the physical location where ECS resources are located. It is recommended to choose Hong Kong or overseas locations without filing, and to choose a location closer to their business scope if there is filing.
Cloud server management console: refers to the web operation interface of ECS.

2. Advantages:

Comprehensive location and performance

多地域多可用区：覆盖国内多点以及海外节点。您可以选择就近的地域进行应用部署，以获得较低的时延。
多种机型配置：提供多种系列、规格的计算资源配置，满足不同类别的客户需求。
通用型：适合中小型Web应用、中小型数据库。
内存型：适合需要大量的内存操作、查找和计算的应用。
高性能型：可获得比标准系列更高的处理能力，适合高性能计算以及计算密集型应用程序。

Elastic scaling

The computing resources can be scaled horizontally and vertically at any time according to their own business needs, greatly reducing resource waste.
Create and release Alibaba Cloud servers in minutes, and the configuration changes of Alibaba Cloud servers can be realized within a few minutes.
The data and environment of the Alibaba Cloud server can be cleared and copied through self-image production.
Custom network architecture: Private network (VPC) provides users with independent network space, custom network segmentation and IP address, custom routing strategy, etc. Provide port-level access control to achieve comprehensive network logic isolation.

Safe and reliable

Service reliability: We promise that service availability is not less than 99.95%, and data reliability is not less than 99.9999%. Support data backup, rollback and system performance alarm. The multi-layer security protection mechanism of the underlying architecture, DDos protection, intrusion detection, vulnerability scanning and login protection, etc., ensure the safe operation of Alibaba Cloud servers.
Storage strategy: Three copies of data storage strategy to eliminate single points of failure and ensure data reliability.
Network strategy: 100% complete network isolation between users to ensure data security.
Data security: Users can log in to the Alibaba Cloud server through a variety of encryption methods, including key login, password login, and console web access tool login

ps: Although the small cloud service provider is cheap, the service experience is extremely poor; the larger cloud service provider has the same price, but lacks first-mover advantage, lack of relevant experience, and it takes longer to get started a little.
Compare this: the zs thing, Weibo did not collapse, Douban collapsed, understand what I mean.

In terms of my personal experience, Alibaba Cloud is currently number one, Huawei Cloud is second, and Tencent Cloud is third.