CVM Overview
Last updated: 2025-11-07 16:52:07
What Is CVM?
Cloud Virtual Machine (CVM) is a scalable computing service provided by Tencent Cloud that allows you to obtain a secure and reliable virtual computing environment within minutes without the need to purchase expensive physical hardware. CVM eliminates the need to estimate capacity and make initial investments required for traditional servers, enabling you to start any number of instances on demand and quickly deploy your businesses. Simultaneously, you can customize and adjust all resources, such as CPU, memory, hard disk, network, and security, at any time, achieving pay-as-you-go and auto scaling. Furthermore, CVM provides a rich selection of images and features such as automatic backups, monitoring and alarms, and elastic public IP addresses to help reduce Ops costs while improving business continuity and security.
Understanding the following related concepts can help you better understand CVM:
Concept | Description |
A CVM instance on the cloud, including the basic computing components such as vCPU, memory, operating system, network, and disk. Tencent Cloud provides different CPU, memory, storage, and network configurations for CVM instances. For details, see Instance Specifications. | |
A preset template used for rapid instance creation, including the operating system and pre-installed software required to start CVM instances. | |
A distributed block storage service that serves as the system disk or data disk for CVM instances, providing persistent data storage. | |
A virtual, customizable, and logically isolated network space provided by Tencent Cloud. | |
Provides local area network (LAN) services, allowing CVM instances within VPC to communicate with each other. | |
Provides wide area network (WAN) services, allowing CVM instances within VPC to access external services. | |
A virtual firewall with stateful detection and data packet filtering features, which is used for network access control of one or multiple CVM instances. |
Why Choose Tencent Cloud CVM?
Tencent Cloud CVM transforms traditional IT processes of "purchasing servers – deploying – cabling – Ops" into a rapid, streamlined mode of "three-minute startup, second-level configuration adjustment, and pay-as-you-go", delivering cost efficiency, elasticity, security, Ops, and reliability all at one time.
Cost: There is no need to purchase physical hardware, and billing by second and pay-as-you-go are supported. Flexible configuration downgrade is supported during off-peak periods, and you only need to pay for the actually used computing resources.
Elasticity: Perform the hot upgrade of CPU, memory, and bandwidth with one click. Vertical scale-out can be completed within 30 seconds, while hundreds of instances can be scaled out within seconds to smoothly handle traffic surges.
Security: The underlying multi-replica distributed storage ensures second-level failover during hardware failures. Capabilities such as anti-DDoS, vulnerability scanning, and host security are integrated. Key data can be protected through snapshots, regular backups, and cross-region disaster recovery with one click.
Ops: Tencent Cloud manages all hardware and IDC Ops. You can remotely perform installation, configuration adjustments, monitoring, and restarts through the console or APIs. System patching and failure recovery are completed automatically on the platform, allowing you to focus solely on business.
Reliability: Support the single-instance availability of 99.975% and data durability of 99.9999999%. Imperceptible migration upon downtime, snapshot rollback, and cloud monitoring and alarms are supported, ensuring the stability and security of your servers.
How Is Tencent Cloud CVM Billed?
Tencent Cloud CVM resources mainly involve billing for instances, images, block storage, public network bandwidth, and other related resources, with the following billing modes:
Yearly/Monthly subscription: Prepaid mode requiring usage of at least one month. It is suitable for scenarios with long-term stable and predictable resource consumption, providing lower unit prices.
Pay-as-you-go: Postpaid mode billed by second and paid by hour, allowing instances to be created or released at any time. It is suitable for surging or short-term resource demands.
Spot instance: Postpaid mode with prices fluctuating according to the market (typically 3%–20% of the pay-as-you-go instance price). However, instances may be reclaimed by the system proactively, making this mode suitable for business scenarios that can tolerate interruptions.
Underwriting: Prepaid mode requiring annual resource commitment with monthly payments, without support for refunds or configuration adjustments during the period. It is suitable for long-term stable and price-sensitive business scenarios.
How to Get Started with Tencent Cloud CVM?
By registering a Tencent Cloud account, you can create, use, or release CVM instances through the following methods provided by Tencent Cloud:
Web console: On the Tencent Cloud official website, click Console in the upper right corner to perform visual management of CVM resources through the console interface, meeting daily Ops needs.
CVM API: Call APIs through methods such as Explorer, CLI, and SDKs to schedule and manage CVM resources, meeting efficient Ops needs.
API Explorer: Provide online calls, signature verification, SDK code generation, and quick API search capabilities. You can view request content and response results for each call, along with automatically generated examples of SDK calls.
Tencent CLI: Through Tencent Cloud Command Line Interface (TCCLI), you can quickly and easily call TencentCloud API to manage your cloud resources.
SDK: TencentCloud provides a supporting software development kit (SDK) for APIs that supports multiple programming languages, making it easier to call APIs.
Guide of Common CVM Operations
Common Operation | Reference Documentation |
Create a Tencent Cloud CVM instance and customize its specifications, storage media, capacity, network bandwidth, and security groups. | |
Ensure that the instance name/host name follows a certain naming convention. | |
Upgrade or downgrade the configurations of CVM instances. | |
Take SSH keys as the encrypted login method for the CVM instance and manage them accordingly. | |
Change or reset the instance login password. | |
Create a custom image, and use the image to create more instances with the same custom items as those of the original instance. | |
Obtain shared images from other users to obtain the required components and add custom content. | |
Import system disk image files from local servers or servers on other platforms into the custom image of CVM instances. | |
Migrate the systems and applications of source servers from original environments, such as self-built IDCs and the cloud platform, to Tencent Cloud. | |
Expand the cloud disk size to increase storage space. | |
Convert public IP addresses to Elastic IP (EIP) instances to avoid instance faults. | |
Configure security groups based on actual scenarios. | |
Categorize and manage CVM resources from various dimensions, such as business, purpose, and owner. | |
View monitoring data such as CPU, memory, network bandwidth, and disk of CVM instances. | |
Build your own website or forum on CVM instances. |
Other Related Products
You can use Auto Scaling (AS) to automatically increase or decrease the number of instances in a cluster on schedule or based on specific conditions. For more information, see AS Product Documentation.
You can use Cloud Load Balancer (CLB) to automatically distribute request traffic from the client across multiple CVM instances. For more information, see CLB Product Documentation.
You can use Tencent Kubernetes Engine (TKE) to manage the lifecycle of container applications on CVM instances. For more information, see TKE Product Documentation.
You can deploy relational databases on the cloud or use Tencent Cloud databases. For more information, see TencentDB for MySQL.
You can use the Tencent Cloud Observability Platform (TCOP) service to monitor the CVM instances and their system disks. For more information, see Cloud Monitor Product Documentation.
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