What is flannel software?

Introducing flannel: An etcd backed overlay network for containers. While flannel was originally designed for Kubernetes, it is a generic overlay network that can be used as a simple alternative to existing software defined networking solutions.Click to see full answer. Then, how does flannel work in Kubernetes?The Overlay Network. Flannel is created by CoreOS for Kubernetes networking, it also can be used as a general software defined network solution for other purpose. All containers(Pod) will be assigned one ip address in this overlay network, they communicate with each other by calling each other’s ip address directly.Furthermore, what is KUBE flannel? kube-flannel. A service account for flannel to use. A ConfigMap containing both a CNI configuration and a flannel configuration. The network in the flannel configuration should match the pod network CIDR. The choice of backend is also made here and defaults to VXLAN. Subsequently, question is, what is flannel virtual network? flannel is a virtual network that gives a subnet to each host for use with container runtimes. Platforms like Google’s Kubernetes assume that each container (pod) has a unique, routable IP inside the cluster.How does Kubernetes network work?In Kubernetes, every pod has its own routable IP address. Kubernetes networking uses iptables to control the network connections between pods (and between nodes), handling many of the networking and port forwarding rules. This way, clients do not need to keep track of IP addresses to connect to Kubernetes services.