CDN edge node cross-machine scheduling method and system based on eBPF technology

Abstract

The invention discloses a CDN node cross-machine scheduling method and system based on an eBPF technology, and the method comprises the steps: judging the load conditions of virtual network cards under a first server and a second server on a CDN node; when the first server does not have a virtual network card with a redundant bandwidth, guiding the access request to a virtual network card with the minimum load in a second server under the CDN node; embedding eBPF module codes in a TC layer of an operating system kernel in each machine, and installing a communication Agent module in each single machine, wherein the Agent module is mainly responsible for cross-machine communication (through an ARP broadcast function of a router) and data interaction (cross-machine network card load condition intercommunication, and UDP communication is adopted), and the eBPF module is mainly used for selecting a virtual network card with low bandwidth load from a machine cluster in a node to carry out data return, so that the problem of multiple 302 redirection of a client is solved. and the effect consumption of the request is reduced; besides, an endless loop is avoided during cross-machine scheduling in the node, so that the optimal scheduling is realized.

Description

technical field [0001] The invention relates to the field of CDN node scheduling, in particular to a CDN node cross-machine scheduling method and system based on eBPF technology. Background technique [0002] In the field of CDN distribution, the HTTP 302 scheduling mechanism (redirection mechanism) is usually used to achieve better scheduling effects. The principle of the HTTP 302 scheduling mechanism is as follows: Assume that domain name A is connected to the CDN network and an HTTP dispatch center is configured. When a user terminal initiates a request for domain name A, the request for domain name A will be guided by the CNAME to the HTTP dispatch center of the CDN. Based on the node health status, load status and other information in the preset DNS resolution table, the center comprehensively judges and gives the scheduling result, returns a 302 status code, and returns the redirected IP address in the Location response header, and the user terminal receives a 302 redi...

AI Technical Summary

Problems solved by technology

[0005] Multiple 302 redirects increase the efficiency of client access lines and affect customer access experience;

[0006] 302 is redirected to other IP lines. It cannot guarantee that the IP line after scheduling is low load, or the IP line after redirection may also be high load, which will increase 1 302 redirect, multiple redirects, there is a risk of directional infinite loop

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