Docker network kubernetes manual#

It uses kube-proxy to manage filtering rules.

Calico PresentationД¬alico is a network solution for Kubernetes which is described as a simple, scalable and secure solution. The deployment tests have benn done with Kubespray. In this blog post, we are going to present different solutions and their operations with Kubernetes.ДЇast access: Calico - Cilium - Contiv - Flannel - WeaveNet Two others, Cilium and Contiv, provide interesting features too.

Three solutions are mainly used: Calico, Flannel and WeaveNet. Numerous networking solutions compatible with Kubernetes are available. Network plugins create their own types with the information given above.Д¬omparison of different CNI + plugin solutions on k8s Network name, type (bridge, vlan, ipvlan, loopback, macvlan, ptp) are usually specified, as well as its IPam (dhcp, host-local) with a type, subnetwork and routes linked to it. The networkвЂ™s type configuration used is written in the /etc/cni/net.d/nf file. It manages the interface setup (and its IP) in a namespace and its configuration with the host (bridge connection and routes management). A CNI plugin must be executed by the container system management. Overlay is a bit slower than underlay, as it creates tunnels between hosts, which reduces available MTUs.Д¬NI is a group of specifications and libraries (written in Go) that aim at helping network plugins integration. Overlay is a virtual network, composed of vlan, veth (virtual interface) and VxLAN it encapsulates the network trafic.Underlay is defined at the physical level (switchs, routersвЂ¦).Kubernetes makes it possible to use both. Linux networking can be defined in two ways: underlay or overlay. Creation and administration of networks become easier. Basic configurations are automatically generated. The second solution to setup Kubernetes network is to use the Container Network Interface (CNI) and a network plugin. Ip link add veth1kubbr1 type veth peer name kubbr Hereafter a configuration example for bridge creation with one node and one interface: brctl addbr kubbr1

Docker network kubernetes manual#

With Google or Amazon cloud solutions, manual configuration is possible, but when you donвЂ™t perfectly stick with it, it tends to be more difficult to manage the configurations. The first solution to configure the network is to create a virtual bridge with an IP range, then add manually on each host a route between hosts.

Or CNI with its plugins вЂ“ most frequently used, and which will be the base of our comparison.

The IP seen by a container is the same as the IP seen by external components.

All nodes can communicate with pods without NAT, in both directions.

All pods can communicate with each other without NAT.

Kubernetes requires networks to follow these rules: Intended audience : System Administrators with Kubernetes and network knowledgeД«y Maud Laurent, System Administrator LibreД¬omparative Kubernetes networks solutions Introduction: Kubernetes operation This blog post presents and compares different network solutions working with Kubernetes.