Explicitly defines the --kubelet-preferred-address-types parameter #2418

Fixes #2453

Add `state: directory` to `file` task so that `recurse: yes` will actually take effect and ensure
certs/keys have the right file mode and owner

to the API server configuration.

This solves the problem where if you have non-resolvable node names,
and try to scale the server by adding new nodes, kubectl commands
start to fail for newly added nodes, giving a TCP timeout error when
trying to resolve the node hostname against a public DNS.

Add etcd-events cluster for kube-apiserver

* Fix run kubectl error

Fix run kubectl error when first master doesn't work

* if access_ip is define use first_kube_master
else different master use a different ip

* Delete set first_kube_master and use kube_apiserver_access_address

* Fixed generate front proxy client certs with vault

* fix vault cert management

* Distrebute etcd node certs to vault hosts

Adding health checking to kube proxy. Fixes #2308

* Set filemode to 0640

weave-net.yml file is readable by all users on the host. It however contains the weave_password to encrypt all pod communication. It should only be readable by root.

* Set mode 0640 on users_file with basic auth

* Added cilium support

* Fix typo in debian test config

* Remove empty lines

* Changed cilium version from <latest> to <v1.0.0-rc3>

* Add missing changes for cilium

* Add cilium to CI pipeline

* Fix wrong file name

* Check kernel version for cilium

* fixed ci error

* fixed cilium-ds.j2 template

* added waiting for cilium pods to run

* Fixed missing EOF

* Fixed trailing spaces

* Fixed trailing spaces

* Fixed trailing spaces

* Fixed too many blank lines

* Updated tolerations,annotations in cilium DS template

* Set cilium_version to iptables-1.9 to see if bug is fixed in CI

* Update cilium image tag to v1.0.0-rc4

* Update Cilium test case CI vars filenames

* Add optional prometheus flag, adjust initial readiness delay

* Update README.md with cilium info

xtables lock was missing. Added new option for oom-score to make sure it's not killed in an OOM situation before regular pods.

`FAILED! => {"changed": false, "msg": "AnsibleFilterError: Version comparison: unorderable types: str() < int()"}`

Even though there it kubeadm_token_ttl=0 which means that kubeadm token never expires, it is not present in `kubeadm token list` after cluster is provisioned (at least after it is running for some time) and there is issue regarding this https://github.com/kubernetes/kubeadm/issues/335, so we need to create a new temporary token during the cluster upgrade.

Ansible automatically installs the python-apt package when using
the 'apt' Ansible module, if python-apt is not present. This patch
removes the (unneeded) explicit installation in the Kubespray
'preinstall' role.

Rename from aggregator-proxy-client to front-proxy-client to match kubeadm design. Added kubeadm support too. Changed to use variables set and not hardcode paths. Still missing cert generation for Vault

1.Disalbe install epel-release rpm on Centos/Redhat
2.Use yum install epel-release

* allow installs to not have hostname overriden with fqdn from inventory
* calico-config no longer requires local as and will default to global
* when cloudprovider is not defined, use the inventory_hostname for cni-calico
* allow reset to not restart network (buggy nodes die with this cmd)
* default kube_override_hostname to inventory_hostname instead of ansible_hostname