upgrader

Cluster Upgrader

upgrader is a standalone tool to upgrade an entire cluster, including the control plane and all nodes. It is an example of a tool that can be written on top of the Cluster API in a completely cloud-agnostic way.

Building

$ cd $GOPATH/src/sigs.k8s.io/
$ git clone https://github.com/kubernetes-sigs/cluster-api
$ cd cluster-api/tools/upgrader
$ go build

Running

1. First, create a cluster using the gcp-deployer tool (the default Kubernetes version should be 1.8.3)
2. To update the entire cluster to v1.9.4, run ./upgrader -v 1.9.4