andrestc / remesher

Kubernetes controller to manage custom node to node bgp calico mesh

remesher

Remesher is a Kubernetes controller that watches for nodes inside the cluster and generates BGPPeers (custom resource defined by calico) to construct a customized, segregated Node to Node BGP mesh based on the node's labels.

How it Works

Remesher constructs a customized node to node mesh based on a configurable neighborhood node label. The diagram below is an example of running the controller on a Kubernetes cluster with a single master (denoted by the node with node-role.kubernetes.io/master label) with --neighborhood-label remesher.io/group.

This will create two partitioned node meshes, one for each group (blue, purple). Every node will be a BGPPeer of:

1. Nodes with the same --neighborhood-label value
2. Master nodes (based on the node-role.kubernetes.io/master label)
3. Global nodes (based on the remesher.tsuru.io/global label)

Remesher uses the calico client to create/list/delete BGPPeers resources.