Method and system for modifying Pod network interface during operation based on CNI plug-in in K8s

Abstract

The invention provides a method and a system for modifying a Pod network during operation based on a CNI plug-in in K8s. The method comprises the following steps: Pod is called to nodes; the Kubelet is used for calling a Multi CNI (Computer Network Interface) cmdAdd interface; the Multi CNI calls a Dturbo CNI cmdAdd interface, and the Dturbo CNI cmdAdd interface is called by the Multi CNI; the Dturbo CNI generates a Pod network namespace record in the cmdAdd interface; when the Operator monitors the newly added Pod network namespace record, the Operator creates a corresponding network interface according to the Pod network interface definition; the Pod is removed from the node; the Kubelet is used for calling a Multi CNI (Computer Network Interface) cmdDel interface; the Multi CNI calls a Dturbo CNI cmdDel interface, and the Dturbo CNI cmdDel interface is called by the Multi CNI; the Dturbo CNI deletes a Pod network namespace record in the cmdDel interface; when the Operator monitors that the network namespace record is deleted, the Operator deletes the existing network interface of the Pod; a Pod network interface definition is externally modified; the Operator monitors that the definition of the network interface in the Pod configuration is modified; the Operator deletes the existing network interface of the Pod; and the Operator creates a corresponding network interface according to the modified Pod network interface definition. According to the invention, the capability of modifying the Pod network interface during operation is provided, and specific service requirements are met.

Description

technical field [0001] The present invention relates to the technical field of modifying a Pod network interface in K8s, in particular to a method and a system for modifying a Pod network interface during runtime based on a CNI plug-in in K8s. Background technique [0002] To create a Pod in a Kubernetes (K8s for short) cluster, only one network card can be used by default, but in some cases (such as implementing the container routing function), a single network card cannot meet the experimental requirements. Multus-CNI provides the ability to add multiple interfaces to a Pod, which allows the Pod to connect to multiple networks through different interfaces, and each interface will use its own CNI plug-in (CNI plug-in refers to complying with the container network interface specification The implemented network plug-in is the implementation method of the mainstream network plug-in in the K8s community), that is, multiple network cards of different network segments are establ...

AI Technical Summary

Problems solved by technology

[0006] In view of the prior art mentioned above, the inventor believes that it is impossible to dynamically access different data sources or send them to different destinations on demand (such as external instructions) during the running of the Pod, and there are some specific business requirements (such as packet playback or During packet processing), the network interface of the Pod cannot be modified during operation to access different data sources

Such needs cannot be met using standard web plugins

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