Add check that kube-master, kube-node and etcd groups are not empty.

Added download_validate_certs option

Fix/ubuntu xenial resolv conf

remove /var/lib/cni directory in reset playbook

Fix CI issue (Fedora task introduce new lookup plugin)

* Support for AWS cloud-config

* Update docs

* Fix version incompatibilities

* Do not use shorthand `default`

* Add new cloud config variable, roleArn

Remove some useless files

Add additional no proxy parameter for more customization

Support Fedora 28

Remove duplicate persistent_volumes_enabled element in k8s-cluster.yml

Remove EFK from Kubespray

Fix some typos

Signed-off-by: Rui Cao <ruicao@alauda.io>

Check `openstack_cacert` for empty string

Uses etcdv3 for calico 3 rr_v4 resources

Mount basic auth or token auth dirs to support it on kubeadm deployments

Add support for GPU accelerator

Add kubelet path for kubeadm.

add support for openstack trust to cloud provider config

Fix test readme formatting

Make Felix healthhost configurable

* fix openstack cli syntax

* 'allowed-address' is also a dash, not an underscore

* multiple allowed-address

multiple allowed-address must be in separate parameters

Offline environment documentation

fix the output of router_id with the right id

Calico version verification before cluster upgrade begin.

Fixes Calico 3.x BGPPeer resources