In cloud computing, cloud infrastructure mainly refers to the underlying infrastructure resources, which are mainly used to support the operation of applications and services. Most cloud infrastructure resources are provided in a virtualized manner, allowing users to use them on demand and adjust them as needed. Common cloud computing infrastructure mainly includes:

　　Cloud infrastructure refers to the underlying infrastructure resources provided in a cloud computing environment to support the operation of applications and services. These infrastructure resources are often provided in a virtualized manner, allowing users to use them on demand and adjust them as needed. Cloud infrastructure typically includes the following major components:

　　Computing resources

　　Including virtual machines, containers and computing instances, used to run applications and services.

　　Storage resources

　　Provide data storage and management functions, including block storage, file storage and object storage, etc.

　　Internet resources

　　Including virtual network, load balancing, firewall and routing, etc., used to connect and manage various computing and storage resources.

　　Management and monitoring tools

　　Provides management, monitoring, automation and configuration functions of cloud resources to help users better manage and maintain their cloud environment.

　　safety

　　Provide security measures and functions to ensure the protection of cloud infrastructure and user data, including firewalls, encryption, identity authentication, etc.

　　Database service

　　Provide various types of database services, such as relational databases, NoSQL databases, etc., for data storage and management.

　　Containers and microservices

　　Provides a container management platform and microservice architecture to build, deploy and manage applications more efficiently.

　　Automation tools

　　Provide automation tools and scripts to help users achieve automated deployment, configuration and management.

　　Flexible expansion

　　Provide elastic expansion capabilities of resources, allowing users to increase or decrease computing, storage and network resources as needed.

　　Geographical distribution

　　Provides options for multiple data centers and geographies for high availability and disaster recovery.

　　The above components together form the cloud computing infrastructure. Users can choose appropriate resources to build, deploy and manage applications and services according to their own needs. Different cloud service providers vary in their specific implementation. But the concepts and components of most cloud infrastructure are similar.