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# OpenStack Provisioning
This directory contains [Ansible][ansible] playbooks and roles to create
OpenStack resources (servers, networking, volumes, security groups,
etc.). The result is an environment ready for OpenShift installation
via [openshift-ansible].
We provide everything necessary to be able to install OpenShift on
OpenStack (including the load balancer servers when
necessary). In addition, we work on providing integration with the
OpenStack-native services (storage, lbaas, baremetal as a service,
dns, etc.).
## OpenStack Requirements
Before you start the installation, you need to have an OpenStack
environment to connect to. You can use a public cloud or an OpenStack
within your organisation. It is also possible to
use [Devstack][devstack] or [TripleO][tripleo]. In the case of
TripleO, we will be running on top of the **overcloud**.
The OpenStack release must be Newton (for Red Hat OpenStack this is
version 10) or newer. It must also satisfy these requirements:
* Heat (Orchestration) must be available
* The deployment image (CentOS 7.4 or RHEL 7) must be loaded
* The deployment flavor must be available to your user
- `m1.medium` / 4GB RAM + 40GB disk should be enough for testing
- look at
the [Minimum Hardware Requirements page][hardware-requirements]
for production
* The keypair for SSH must be available in openstack
* `keystonerc` file that lets you talk to the openstack services
* NOTE: only Keystone V2 is currently supported
Optional:
* External Neutron network with a floating IP address pool
## Installation
There are four main parts to the installation:
1. [Preparing Ansible and dependencies](#1-preparing-ansible-and-dependencies)
2. [Configuring the desired OpenStack environment and OpenShift cluster](#2-configuring-the-openstack-environment-and-openshift-cluster)
3. [Creating the OpenStack Resources and Installing OpenShift](#3-creating-the-openstack-resources-and-installing-openshift)
This guide is going to install [OpenShift Origin][origin]
with [CentOS 7][centos7] images with minimal customisation.
We will create the VMs for running OpenShift, in a new Neutron network and
assign Floating IP addresses.
The OpenShift cluster will have a single Master node that will run
`etcd`, a single Infra node and two App nodes.
You can look at
the [Advanced Configuration page][advanced-configuration] for
additional options.
### 1. Preparing Ansible and dependencies
First, you need to select where to run [Ansible][ansible] from (the
*Ansible host*). This can be the computer you read this guide on or an
OpenStack VM you'll create specifically for this purpose.
We will use
a
[Docker image that has all the dependencies installed][control-host-image] to
make things easier. If you don't want to use Docker, take a look at
the [Ansible host dependencies][ansible-dependencies] and make sure
they're installed.
Your *Ansible host* needs to have the following:
1. Docker
2. `keystonerc` file with your OpenStack credentials
3. SSH private key for logging in to your OpenShift nodes
Assuming your private key is `~/.ssh/id_rsa` and `keystonerc` in your
current directory:
```bash
$ sudo docker run -it -v ~/.ssh:/mnt/.ssh:Z \
-v $PWD/keystonerc:/root/.config/openstack/keystonerc.sh:Z \
redhatcop/control-host-openstack bash
```
This will create the container, add your SSH key and source your
`keystonerc`. It should be set up for the installation.
You can verify that everything is in order:
```bash
$ less .ssh/id_rsa
$ ansible --version
$ openstack image list
```
### 2. Configuring the OpenStack Environment and OpenShift Cluster
The configuration is all done in an Ansible inventory directory. We
will clone the [openshift-ansible][openshift-ansible] repository and set
things up for a minimal installation.
```
$ git clone https://github.com/openshift/openshift-ansible
$ cp -r openshift-ansible/playbooks/openstack/sample-inventory/ inventory
```
If you're testing multiple configurations, you can have multiple
inventories and switch between them.
#### OpenStack Configuration
The OpenStack configuration is in `inventory/group_vars/all.yml`.
Open the file and plug in the image, flavor and network configuration
corresponding to your OpenStack installation.
```bash
$ vi inventory/group_vars/all.yml
```
1. Set the `openshift_openstack_keypair_name` to your OpenStack keypair name.
- See `openstack keypair list` to find the keypairs registered with
OpenShift.
- This must correspond to your private SSH key in `~/.ssh/id_rsa`
2. Set the `openshift_openstack_external_network_name` to the floating IP
network of your openstack.
- See `openstack network list` for the list of networks.
- It's often called `public`, `external` or `ext-net`.
3. Set the `openshift_openstack_default_image_name` to the image you want your
OpenShift VMs to run.
- See `openstack image list` for the list of available images.
4. Set the `openshift_openstack_default_flavor` to the flavor you want your
OpenShift VMs to use.
- See `openstack flavor list` for the list of available flavors.
#### OpenShift configuration
The OpenShift configuration is in `inventory/group_vars/OSEv3.yml`.
The default options will mostly work, but unless you used the large
flavors for a production-ready environment, openshift-ansible's
hardware check will fail.
Let's disable those checks by putting this in
`inventory/group_vars/OSEv3.yml`:
```yaml
openshift_disable_check: disk_availability,memory_availability
```
**NOTE**: The default authentication method will allow **any username
and password** in! If you're running this in a public place, you need
to set up access control.
Feel free to look at
the [Sample OpenShift Inventory][sample-openshift-inventory] and
the [advanced configuration][advanced-configuration].
### 3. Creating the OpenStack Resources and Installing OpenShift
We provide an `ansible.cfg` file which has some useful defaults -- you should
copy it to the directory you're going to run `ansible-playbook` from.
```bash
$ cp openshift-ansible/ansible.cfg ansible.cfg
```
Then run the provision + install playbook -- this will create the OpenStack
resources:
```bash
$ ansible-playbook --user openshift -i inventory \
openshift-ansible/playbooks/openstack/openshift-cluster/provision_install.yaml \
-e openshift_repos_enable_testing=true
```
Note, you may want to use the testing repo for development purposes only.
Normally, `openshift_repos_enable_testing` should not be specified.
If you're using multiple inventories, make sure you pass the path to
the right one to `-i`.
If your SSH private key is not in `~/.ssh/id_rsa` use the `--private-key`
option to specify the correct path.
### Next Steps
And that's it! You should have a small but functional OpenShift
cluster now.
Take a look at [how to access the cluster][accessing-openshift]
and [how to remove it][uninstall-openshift] as well as the more
advanced configuration:
* [Accessing the OpenShift cluster][accessing-openshift]
* [Removing the OpenShift cluster][uninstall-openshift]
* Set Up Authentication (TODO)
* [Multiple Masters with a load balancer][loadbalancer]
* [External Dns][external-dns]
* Multiple Clusters (TODO)
* [Cinder Registry][cinder-registry]
* [Bastion Node][bastion]
[ansible]: https://www.ansible.com/
[openshift-ansible]: https://github.com/openshift/openshift-ansible
[devstack]: https://docs.openstack.org/devstack/
[tripleo]: http://tripleo.org/
[ansible-dependencies]: ./advanced-configuration.md#dependencies-for-localhost-ansible-controladmin-node
[control-host-image]: https://hub.docker.com/r/redhatcop/control-host-openstack/
[hardware-requirements]: https://docs.openshift.org/latest/install_config/install/prerequisites.html#hardware
[origin]: https://www.openshift.org/
[centos7]: https://www.centos.org/
[sample-openshift-inventory]: https://github.com/openshift/openshift-ansible/blob/master/inventory/byo/hosts.example
[advanced-configuration]: ./advanced-configuration.md
[accessing-openshift]: ./advanced-configuration.md#accessing-the-openshift-cluster
[uninstall-openshift]: ./advanced-configuration.md#removing-the-openshift-cluster
[loadbalancer]: ./advanced-configuration.md#multi-master-configuration
[external-dns]: ./advanced-configuration.md#dns-configuration-variables
[cinder-registry]: ./advanced-configuration.md#creating-and-using-a-cinder-volume-for-the-openshift-registry
[bastion]: ./advanced-configuration.md#configure-static-inventory-and-access-via-a-bastion-node
|
