Add support install python-pip from local yum repository if local yum repository exist.

Signed-off-by: Ganesh Maharaj Mahalingam <ganesh.mahalingam@intel.com>

Adding fact is_atomic in bootstrap-centos.yml.

Fix issue: #3538

* Fix Failure talking to yum: Cannot find a valid baseurl for repo: base/7/x86_64 if Install packages in CentOS using proxy

* Add proxy to /etc/yum.conf if http_proxy is defined

need set hostname by kubeadm

* warning on meta flush_handlers

* avoid rm

* avoid "Module remote_tmp /root/.ansible/tmp did not exist and was created with a mode of 0700, this may cause issues when running as another user. To avoid this, create the remote_tmp dir with the correct permissions manually" warning on subsequent tasks using blockinfile

* is match

* Automatically infer bootstrap_os

* Rename bootstrap os to os_family

* Fix bootstrap_os/ubuntu idempotency

* Update bastion role

* move container_engine in sub-roles

* requires ansible 2.5

* ubuntu18 as first CI job

* Change execution order for pip

* Remove spaces

* Disable locksmithd on CoreOS if coreos_auto_upgrade set to false

* change when format to support multiple-condition

* Move front-proxy-client certs back to kube mount

We want the same CA for all k8s certs

* Refactor vault to use a third party module

The module adds idempotency and reduces some of the repetitive
logic in the vault role

Requires ansible-modules-hashivault on ansible node and hvac
on the vault hosts themselves

Add upgrade test scenario
Remove bootstrap-os tags from tasks

* fix upgrade issues

* improve unseal logic

* specify ca and fix etcd check

* Fix initialization check

bump machine size

This reverts commit 51f4e658.

pip was always being downloaded on subsequent runs, This PR always runs the pip command, and checks the rc of it before downloading pip

Fix in favor of #2582

openSUSE Tumbleweed is having the same problems with CoreOS when it
comes to using the hostname ansible module (#1588, #1600) so we need
to apply a similar workaround.

Co-authored-by: Markos Chandras <mchandras@suse.de>
Link: http://bugzilla.opensuse.org/show_bug.cgi?id=997614

Install some required packages when running on SUSE distributions.

* 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

import_tasks will consume far less memory, so it should be
used whenever it is compatible.

* Change deprecated vagrant ansible flag 'sudo' to 'become'

* Emphasize, that the name of the pip_pyton_modules is only considered in coreos

* Remove useless unused variable

* Fix warning when jinja2 template-delimiters used in when statement

There is no need for jinja2 template-delimiters like {{ }} or {% %}
any more. They can just be omitted as described in https://github.com/ansible/ansible/issues/22397

* Fix broken link in getting-started guide

* Changre raw execution to use yum module

Changed raw exection to use yum module provided by Ansible.

* Replace ansible_ssh_* by ansible_*

Ansible 2.0 has deprecated the “ssh” from ansible_ssh_user, ansible_ssh_host, and ansible_ssh_port to become ansible_user, ansible_host, and ansible_port. If you are using a version of Ansible prior to 2.0, you should continue using the older style variables (ansible_ssh_*). These shorter variables are ignored, without warning, in older versions of Ansible.

I am not sure about the broader impact of this change. But I have seen on the requirements the version required is ansible>=2.4.0.

http://docs.ansible.com/ansible/latest/intro_inventory.html

Also fix usage of failed_when and handling exit code.