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Most organizations have some kind of legacy systems. Even after they introduced Kubernetes, they usually don't migrate everything to Kubernetes. As a result, connectivity between legacy systems and Kubernetes sometimes makes problems. One of such problems is how to connect legacy systems that identify senders by using source IPs and Kubernetes that doesn't provide stable source IPs. This session focuses on this problem and explains (1) what kind of legacy systems requires identifying senders by using source IPs, (2) why the Kubernetes network model and Kubernetes features don't provide stable source IPs, (3) How submariner, which is a tool to provide multi-cluster connectivities, helps solving this problem, and (4) Current status of the solution in the community.
Masaki Kimura is an OSS developer at Hitachi Vantara. He has been working for improving Kubernetes. He is one of the main contributors to make raw block volume feature and CSI feature GA.
