* sysctl file should be in defaults so that it can be overriden

* Change sysctl_file_path to be consistent with roles/kubernetes/preinstall/defaults/main.yml

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

* Raise limits for weave

* Adjust weave limits

Kubespray should not install any helm charts. This is a task
that a user should do on his/her own through ansible or another
tool. It opens the door to wrapping installation of any helm
chart.

The RPM file that's provided by upstream can be used for SUSE
distributions as well. Moreover we simplify the playbook to use
the 'package' module to install packages across different distros.

Link: https://github.com/rkt/rkt/pull/3904

Add path for certificate location for SUSE distributions. Also make sure
the 'update-ca-certificates' command is executed on SUSE hosts as well.

Add path for certificate location for SUSE distributions. Also make sure
the 'update-ca-certificates' command is executed on SUSE hosts as well.

If the 'docker' package is already installed, then the handlers will not
run and the service will not be (re-)started. As such, lets make sure
that the service is started even if the packages are already installed.

Add support for installing Docker on SUSE distributions. The Docker
repository at https://yum.dockerproject.org/repo/main/ does not support
recent openSUSE distributions so the only alternative is to use the
packages from the distro repositories. This however renders the
'docker_version' Ansible variable useless on SUSE.

The openssl package on Tumbleweed is actually a virtual package covering
openssl-1.0.0 and openssl-1.1.0 implementations. It defaults to 1.1.0 so
when trying to install it and openssl-1.0.0 is installed, zypper fails
with conflicts. As such, lets explicitly pull the package that we need
which also updates the virtual one.

Co-authored-by: Markos Chandras <mchandras@suse.de>

Add support for installing package dependencies and refreshing metadata
on SUSE distributions

Co-authored-by: Nirmoy Das <ndas@suse.de>

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.

https://kubernetes.io/docs/admin/admission-controllers/#is-there-a-recommended-set-of-admission-controllers-to-use

Changed from OS_PROJECT_ID to OS_PROJECT_NAME.

All checks test if this is defined meaning there is no way to undefine it.

Changed from OS_PROJECT_ID to OS_PROJECT_NAME.

Replaced ansible_ssh_host with ansible_host in sample inventory file as the former is deprecated since Ansible v2.0

Fixed the reference of ansible_user in kubespray-defaults role

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

https://istio.io/docs/setup/kubernetes/sidecar-injection.html#automatic-sidecar-injection

While `do` looks cleaner, forcing this extra option in ansible.cfg
seems to be more invasive. It would be better to keep the traditional
approach of `set dummy = ` instead.

Fix issues #2611

Missed in #2554