January 2019
Intermediate to advanced
484 pages
11h 48m
English
Content preview from DevOps with Kubernetes - Second Edition
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Proxy (kube-proxy)
The proxy handles the routing between a pod load balancer (also known as a service) and pods. It also provides routing from external internet to services. There are three proxy modes: userspace, iptables, and ipvs. The userspace mode creates a large overhead by switching the kernel space and user space. The iptables mode, on the other hand, is the latest default proxy mode. It changes the iptables Network Address Translation (NAT: https://en.wikipedia.org/wiki/Network_address_translation) in Linux to achieve routing TCP and UDP packets across all containers. IP Virtual Servers (IPVS) was general available (GA) in Kubernetes 1.11 and is used to address performance degradations when running 1,000+ services in a cluster. It ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.