Add Kuryr UPI Documentation

[MaysaMacedo]

This doc contains the steps needed to use Kuryr as the SDN
when deploying OpenShift on OpenStack and using a User Provided
Infrastructure.
This commit lists all the necessary steps manually, using the
openstack command to create and delete the resources.

[MaysaMacedo]

/label platform/openstack

[MaysaMacedo]

TODOs:

• Validate steps
• Consider modifying the resources creation to use tag
• Delete the resources created by Kuryr

[luis5tb]

TODOs:

• Validate steps
• Consider modifying the resources creation to use tag
• Delete the resources created by Kuryr

Note you also need to add information about the trunk creation for the worker nodes

[MaysaMacedo]

/assign @mandre

[dulek]

/lgtm

Seems okay to me. I don't like getting LB's one-by-one, but I see python-openstackclient has no support for listing LBs by tag, so I understand we're forced to do it like that.

[MaysaMacedo]

/lgtm

Seems okay to me. I don't like getting LB's one-by-one, but I see python-openstackclient has no support for listing LBs by tag, so I understand we're forced to do it like that.

Yes. Tag is not supported on OSP 13, so we're tagging the resources on the description field. This is a safe way to delete them.

[tomassedovic]

I've left a couple of comments.

Regarding the subnet -> nodes rename, I'm not against it, but there's a few more place where we're using the old name. Can you please fix them all?

[tomassedovic]

/lgtm
/approve

Looking good, thanks!

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dulek, MaysaMacedo, tomassedovic

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[MaysaMacedo]

/test e2e-aws-scaleup-rhel7

[openshift-ci-robot]

@MaysaMacedo: The following test failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
ci/prow/e2e-aws-scaleup-rhel7	bb48777	link	/test e2e-aws-scaleup-rhel7

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