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Cloud Virtual Machine (CVM) provides you with secure and reliable elastic computing services. In just a few minutes, you can obtain and enable CVM in the cloud to meet your computing needs. With changes of service requirements, you can scale up or down the computing resources in real time. Each instance type provides different computing and storage capabilities. You can select the instance computing power, storage space, and network access method for the instance that best suits your service scale.

By referring to the documentation, you can select more advanced settings, such as image platform, storage, bandwidth, and security group through custom configuration. For details, see Customized Configuration for Linux Cloud Server and Customized Configuration for Windows Cloud Server.

CVM currently supports the self-developed TencentOS Server (Linux platform) and diversified third-party operating system, such as Windows Server, OpenCloudOS (Linux platform), CentOS, CentOS Stream, Ubuntu, Red Hat (business edition), Debian, FreeBSD, OpenSUSE, AlmaLinux, CoreOS, Fedora, FreeBSD, and Rocky Linux. More operating systems will be supported later.

You can purchase CVM either on the official website or by calling the related API. To purchase CVM by calling the related API, click Run Instances. For details, see Purchase Channels.

Prepaid: It generally refers to monthly subscription, where you need to first purchase the product before using it. The system calculates the price based on the cloud service type and quantity selected by you, and deducts the fee from your account. For details, see Prepaid Description.

Postpaid (also known as pay-as-you-go): You can apply for and use resources on demand, and pay later based on the actual resources used during settlement. The fee is settled based on the resource settlement cycle. For details, see Pay-As-You-Go Description.

How to choose: In a stable business scenario that requires long-term use of cloud resources, it is recommended that you choose the prepaid mode. If business development significantly fluctuates and accurate predictions cannot be made, or if the use of resources may be temporary and sudden, it is recommended that you choose the postpaid mode.

Tencent Cloud provides you with a Price Calculator when you purchase CVM. You can calculate prices in the calculator and add them to the budget list for comparison between different types of cloud products.

Tencent Cloud offers two CVM billing modes: monthly subscription and pay-as-you-go. Monthly subscription: Suitable for mature business with long-term stable resource demand.

Pay-as-you-go: Suitable for scenarios where the resource demand fluctuates significantly in a short period of time, such as in e-commerce peak shopping periods. You can refer to Billing Modes for comparison and select an appropriate billing mode.

Private IP address: It is used by CVM to provide services for clients that use private IP addresses as their source IP addresses. Public IP address: It is used by CVM to provide services for clients that use public IP addresses as their source IP addresses. The private and public IP addresses of CVM can be directly mapped to each other through Network Address Translation (NAT).

An elastic IP address (EIP) is a static IP address designed specifically for dynamic cloud computing. It is a fixed public IP address in a certain region. With the EIP, you can quickly remap the address to another CVM instance (or NAT gateway instance) in your account, thereby blocking instance failures. For details, see EIP.

Tencent Cloud provides different types of flexible, economical, and easy-to-use data storage devices for CVM instances, including Cloud Block Storage (CBS), local disk, Cloud Object Storage (COS), and block storage. Different storage devices have different performance and prices, and are suitable for different use cases. For details, see Storage Overview.

1. When you use CBS for your CVM, you can back up your business data by creating custom system disk images and data disk snapshots.

If you need to create a custom image, refer to Creating a Custom Image.

If you need to create a snapshot, refer to Creating a Snapshot.

2. If you have high requirements for data security, you can also pay to purchase more professional third-party customized backup services.

In Tencent Cloud, regions are fully isolated from each other, ensuring cross-region stability and fault tolerance. More regions will be provided later. It is recommended that you select the region closest to your end users to minimize access latency and improve download speed. For details about supported regions, see Regions and Availability Zones.

Observe two principles when selecting a region: closest to end users and same region for private network communication.

Closest to end users: Select the CVM region based on your end users' geographical locations. Selecting the region closest to your end users can minimize access latency and improve download speed. For example, when most of your end users are located near the Yangtze River Delta, the Shanghai region is a better choice.

Same region for private network communication: CVM instances in the same region can communicate with each other through the private network (free of charge). CVM instances in different regions cannot communicate with each other through the public network (charged) instead of the private network. If multiple CVM instances need to communicate through the private network, select the same region for these CVM instances.

For details, see Regions and Availability Zones.

Each availability zone operates within its independent and physically different infrastructure and has been designed with high reliability. Unlike other devices such as generators and cooling devices, common failure points are not shared between availability zones. Availability zones are also physically independent of each other, and even extremely rare disasters such as fires, tornadoes, or floods can only affect a single availability zone.

Tencent Cloud provides diversified network and security services, such as the security group, encrypted login, and EIP, to ensure that your instance provides services in a secure, efficient, and flexible manner.

You have full control over the visibility of your system, and CVM allows you to place running instances into any security group of your choice. On the Console > Security Group interface, you can specify security groups for inter-group communication and specify IP subnets on the network that can communicate with CVM instances.

If there are suspected security risks or adverse events, you can refer to Cloud Workload Protection Platform (CWPP) to solve the security issues that arise.

A Tencent Cloud image provides all the information needed to launch a CVM instance. You can launch any number of instances from a specified image, or launch instances from any number of different images based on actual requirements. Images are often used to deploy the software environment in batch and to back up the running environment. For details about the image type, deployment, and application, see Image Overview.

Tencent Cloud provides public images, service market images, shared images, and custom images. For details, see Image Types. You can select an appropriate image type based on their different characteristics.

A shared image is a custom image created by you and shared with other Tencent Cloud users. Tencent Cloud users can conveniently obtain shared images from other users, obtain the needed components from these shared images, and add custom content. For more information about limitations and operation method of shared images, see Shared Images.

An image can be shared with at most 500 Tencent Cloud users. When you share an image to others, the shared replicas do not count against your image quota.

If the Windows system fails to create a custom image, troubleshoot the issue by referring to Image-Related FAQs.