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Recovery from failure in a dynamic scalable services mesh

專利號(hào)
US10868845B2
公開日期
2020-12-15
申請(qǐng)人
Netskope, Inc.（US CA Santa Clara）
發(fā)明人
Ravi Ithal; Umesh Bangalore Muniyappa
IPC分類
H04L29/06; H04L29/08; H04L29/12; H04L12/26
技術(shù)領(lǐng)域
service,pod,netskope,services,packet,security,in,cloud,pods,casb
地域： CA CA Santa Clara

摘要

The technology discloses a method of improved recovery from failure of a service instance in a service chain. Instances AA, BA and BB perform services A and B respectively. Instance BA receives from instance AA a first packet that includes an added header with a stream affinity code consistent for packets in the stream. Instance BA with a primary role specified in a distributed service map processes the packet. BA identifies BB as having a secondary role for packets carrying the code and synchronizes BA state information with BB after processing the packet. After failure of instance BA, instance AA receives an updated service map prepares to forward a second packet, with the same code as the first packet, to BA. After determining from the updated map that BA is no longer available and instance BB has the secondary role, AA forwards the second packet to BB, instead of BA.

說明書

Action 545 includes routing the packet to the selected second service pod upon egress from the first service pod.

If the flow table lacks an entry corresponding to the header data, take action 555 accessing an available pods list in a consistent hash (lookup) table (CHT) of service pods performing the second service.

At action 565, select one of the available pods using a six-tuple hash as a key to the CHT table to select the second service pod, and update the flow table to specify the second service pod as providing the second service for packets sharing the header data.

Other implementations may perform the actions in different orders and/or with different, fewer or additional actions than those illustrated in FIG. 5. Multiple actions can be combined in some implementations. For convenience, this flowchart is described with reference to the system that carries out a method. The system is not necessarily part of the method.

FIG. 7 shows a representative method for improved recovery from failure of a service instance in a service chain that performs at least services A and B, using service instance AA and service instances BA and BB to perform the services A and B, respectively.

權(quán)利要求

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