When kubeadm upgrades a static pod cluster, the old manifests were previously
deleted. This patch alters this behaviour so they are now stored in a
timestamped temporary directory.
Currently kubeadm only performs an upgrade if the etcd cluster is
colocated with the control plane node. As this is only one possible
configuration, kubeadm should support upgrades with etcd clusters
that are not local to the node.
Signed-off-by: Craig Tracey <craigtracey@gmail.com>
- Test HasTLS()
- Instrument throughout upgrade plan and apply
- Update plan_test and apply_test to use new fake Cluster interfaces
- Add descriptions to upgrade range test
- Support KubernetesDir and EtcdDataDir in upgrade tests
- Cover etcdUpgrade in upgrade tests
- Cover upcoming TLSUpgrade in upgrade tests
