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Tom Denham 299c4ec4b3 Merge pull request #656 from tomdee/docs-shuffle		8 年之前
Documentation	bb68236217 Documentation: Split README into multiple files	8 年之前
backend	b616c8bc49 backend/hostgw: Fix memory leak	8 年之前
dist	92d21600c0 e2e: Allow the backend list to be overridden	8 年之前
logos	170fd5de88 logos: resized for readme	9 年之前
network	1bf4e6b6aa vendor: Make code compatible again	8 年之前
pkg	c254deaf7b Correcting format for pkg/ip/ipnet.go	8 年之前
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version	cbac427350 Version embedding for Go 1.4 and 1.5	9 年之前
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.gitignore	2243d07b41 Builds: Insert libpthread into busybox images	8 年之前
.travis.yml	56ef07bd0f Makefile: Push tags to flannel-git for all builds	8 年之前
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README.md	bb68236217 Documentation: Split README into multiple files	8 年之前
glide.lock	fbf578f0df vendor: Revendor with more sensible pinnings	8 年之前
glide.yaml	fbf578f0df vendor: Revendor with more sensible pinnings	8 年之前
license-check.sh	a8972ad5cd BUILDS: Overhaul build process	8 年之前
main.go	afc5e0d997 subnet: Move etcd files into their own package.	8 年之前
packet-01.png	82195b1cc4 diagram: update to reflect name change	10 年之前

flannel

flannel is a virtual network that gives a subnet to each host for use with container runtimes.

Platforms like Kubernetes assume that each container (pod) has a unique, routable IP inside the cluster. The advantage of this model is that it reduces the complexity of doing port mapping.

Theory of Operation

flannel runs an agent, flanneld, on each host and is responsible for allocating a subnet lease out of a preconfigured address space. flannel uses etcd to store the network configuration, allocated subnets, and auxiliary data (such as host's IP). The forwarding of packets is achieved using one of several strategies that are known as backends. The simplest backend is udp and uses a TUN device to encapsulate every IP fragment in a UDP packet, forming an overlay network. The following diagram demonstrates the path a packet takes as it traverses the overlay network:

README.md

flannel

Theory of Operation

Documenation