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Tom Denham 142bb9c2d7 Merge pull request #669 from tomdee/fix-releases 8 jaren geleden
Documentation 7260979f74 Explicitly state operator: Exists for master node toleration - as tolleration defaults to Equal by default which will result in the non scheduling of flannel on the master nodes 8 jaren geleden
backend befe8799db Fix various little problems found by gometalinter 8 jaren geleden
dist a80b580dc5 functional-test: Add a simple bandwidth test 8 jaren geleden
logos 170fd5de88 logos: resized for readme 9 jaren geleden
network 1bf4e6b6aa vendor: Make code compatible again 8 jaren geleden
pkg c254deaf7b Correcting format for pkg/ip/ipnet.go 8 jaren geleden
subnet 5d733f0273 subnet/etcdv2: Fix panic from bad error contruction 8 jaren geleden
vendor fbf578f0df vendor: Revendor with more sensible pinnings 8 jaren geleden
version cbac427350 Version embedding for Go 1.4 and 1.5 9 jaren geleden
.dockerignore a8972ad5cd BUILDS: Overhaul build process 8 jaren geleden
.gitignore 2243d07b41 Builds: Insert libpthread into busybox images 8 jaren geleden
.travis.yml 56ef07bd0f Makefile: Push tags to flannel-git for all builds 8 jaren geleden
CONTRIBUTING.md c1c060c005 Added boilerplate files 10 jaren geleden
DCO c1c060c005 Added boilerplate files 10 jaren geleden
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license-check.sh a8972ad5cd BUILDS: Overhaul build process 8 jaren geleden
main.go afc5e0d997 subnet: Move etcd files into their own package. 8 jaren geleden
packet-01.png 82195b1cc4 diagram: update to reflect name change 10 jaren geleden

README.md

flannel

flannel Logo

Build Status

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:

Life of a packet

Documenation