Kubernetes makes this namespace automatically, so there is
no need for kubespray to manage it.

* Added retries in pre-upgrade.yml and retries while applying kube-dns.yml

* Removed trailing spaces

* Remove old docker packages

This removes docker packages that are obsolete if docker-ce packages are to be installed, which fixes some package conflict issues that can occur during upgrades.

* Add support for setting obsoletes=0 when installing docker with yum

This file should only be updated during kubelet upgrade so that
master components are not accidentally restarted first during
preinstall stage.

- Rename template for /etc/cni/net.d/00-weave.conflist to 00-weave.conflist.j2
- Apply resources requests/limits to both container weave and weave-npc

https://coreos.com/etcd/docs/latest/tuning.html

etcd_snapshot_count
and
ionice priority

The default for kibana_base_url does not make sense an makes kibana unusable. The default path forces a 404 when you try to open kibana in the browser. Not setting kibana_base_url works just fine.

- Fix #2414, so namespace isolation should now works
- Update weave-net.yml.j2 as per latest https://cloud.weave.works/k8s/net
- Other minor fixup

can be set to one of
first-found
can-reach 
interface

- Updating to use calico-node v2.6.7
- A few updates to their manifests too

Labels from role (node-role.k8s.io/node) and labels from inventory are merged into node-labels parameter in kubelet

Addition of the .creds extension to the credentials files generated by password lookup in order for Ansible not to consider them as inventory files with inventory_ignore_extensions set accordingly (#2446)

As requested