Revert "Add an Openstack provider (#397)" (#465)

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-# OpenStack Provisioning
-
-This repository contains playbooks and Heat templates to provision
-OpenStack resources (servers, networking, volumes, security groups,
-etc.). The result is an environment ready for openshift-ansible.
-
-
-## Dependencies
-
-* [Ansible 2.3](https://pypi.python.org/pypi/ansible)
-* [shade](https://pypi.python.org/pypi/shade)
-* python-dns
-
-
-## What does it do
-
-* Create Nova servers with floating IP addresses attached
-* Assigns Cinder volumes to the servers
-* Set up an `openshift` user with sudo privileges
-* Optionally attach Red Hat subscriptions
-* Set up a bind-based DNS server
-* When deploying more than one master, set up a HAproxy server
-
-
-## Set up
-
-### Copy the sample inventory
-
-    cp -r openshift-ansible-contrib/playbooks/provisioning/openstack/sample-inventory inventory
-
-### Copy clouds.yaml
-
-    cp openshift-ansible-contrib/playbooks/provisioning/openstack/sample-inventory/clouds.yaml clouds.yaml
-
-### Copy ansible config
-
-    cp openshift-ansible-contrib/playbooks/provisioning/openstack/sample-inventory/ansible.cfg ansible.cfg
-
-### Update `inventory/group_vars/all.yml`
-
-Pay special attention to the values in the first paragraph -- these
-will depend on your OpenStack environment.
-
-The `env_id` and `openstack_dns_domain` will form the DNS domain all
-your servers will be under. With the default values, this will be
-`openshift.example.com`.
-
-`openstack_nameservers` is a list of DNS servers accessible from all
-the created Nova servers. These will be serve as your DNS forwarders.
-
-`openstack_ssh_key` is a Nova keypair -- you can see your keypairs with
-`openstack keypair list`.
-
-`openstack_default_image_name` is the name of the Glance image the
-servers will use. You can
-see your images with `openstack image list`.
-
-`openstack_default_flavor` is the Nova flavor the servers will use.
-You can see your flavors with `openstack flavor list`.
-
-`openstack_external_network_name` is the name of the Neutron network
-providing external connectivity. It is often called `public`,
-`external` or `ext-net`. You can see your networks with `openstack
-network list`.
-
-The `openstack_num_masters`, `openstack_num_infra` and
-`openstack_num_nodes` values specify the number of Master, Infra and
-App nodes to create.
-
-The `openstack_flat_secgrp`, controls Neutron security groups creation for Heat
-stacks. Set it to true, if you experience issues with sec group rules
-quotas. It trades security for number of rules, by sharing the same set
-of firewall rules for master, node, etcd and infra nodes.
-
-### Update the DNS names in `inventory/hosts`
-
-The different server groups are currently grouped by the domain name,
-so if you end up using a different domain than
-`openshift.example.com`, you will need to update the `inventory/hosts`
-file.
-
-For example, if your final domain is `my.cloud.com`, you can run this
-command to fix update the `hosts` file:
-
-    sed -i 's/openshift.example.com/my.cloud.com/' inventory/hosts
-
-### Configure the OpenShift parameters
-
-Finally, you need to update the DNS entry in
-`inventory/group_vars/OSEv3.yml` (look at
-`openshift_master_default_subdomain`).
-
-In addition, this is the place where you can customise your OpenShift
-installation for example by specifying the authentication.
-
-The full list of options is available in this sample inventory:
-
-https://github.com/openshift/openshift-ansible/blob/master/inventory/byo/hosts.ose.example
-
-Note, that in order to deploy OpenShift origin, you should update the following
-variables for the `inventory/group_vars/OSEv3.yml`, `all.yml`:
-
-    deployment_type: origin
-    origin_release: 1.5.1
-    openshift_deployment_type: "{{ deployment_type }}"
-
-## Deployment
-
-### Run the playbook
-
-Assuming your OpenStack (Keystone) credentials are in the `keystonerc`
-file, this is how you stat the provisioning process:
-
-    . keystonerc
-    ansible-playbook -i inventory --timeout 30  --private-key ~/.ssh/openshift openshift-ansible-contrib/playbooks/provisioning/openstack/provision.yaml
-
-### Install OpenShift
-
-Once it succeeds, you can install openshift by running:
-
-    ansible-playbook --become --user openshift --private-key ~/.ssh/openshift -i inventory/ openshift-ansible/playbooks/byo/openshift-node/network_manager.yml
-    ansible-playbook --become --user openshift --private-key ~/.ssh/openshift -i inventory/ openshift-ansible/playbooks/byo/config.yml
-
-Note, the `network_manager.yml` is only required if you're deploying OpenShift
-origin.
-
-## License
-
-As the rest of the openshift-ansible-contrib repository, the code here is
-licensed under Apache 2. However, the openstack.py file under
-`sample-inventory` is GPLv3+. See the INVENTORY-LICENSE.txt file for the full
-text of the license.