contrail-charms: add option to chose if public or internal Openstack endpoints are configured

[Bernhard Koessler]

Currently, juju charms retrieve public URL from Openstack endpoints. In some environments it is preferable to configure internal/admin Openstack endpoints.

Code Reference: https://github.com/Juniper/contrail-charms/blob/82f4093e24c55e471d6cdd4965366529cd7bbf2c/contrail-openstack/hooks/contrail_openstack_utils.py#L108

Contrail networking 4.1.0 with Canonical Openstack/juju charms.

e.g. for WebUI config in https://github.com/Juniper/contrail-charms/blob/master/contrail-controller/templates/controller.conf

[WEBUI]
# http_listen_port = 8080
# https_listen_port = 8143
# webui_storage_enable = False

{%- if compute_service_ip %}
{%- if version >= 40100 %}
compute_manager_ip = {{ compute_service_ip }}
{%- else %}
nova_api_ip = {{ compute_service_ip }}
{%- endif %}
{%- endif %}

{%- if image_service_ip %}
{%- if version >= 40100 %}
image_manager_ip = {{ image_service_ip }}
{%- else %}
glance_api_ip = {{ image_service_ip }}
{%- endif %}
{%- endif %}

{%- if network_service_ip and (version >= 40001) %}
network_manager_ip = {{ network_service_ip }}
{%- endif %}

[Andrey Pavlov (apavlov-e)]

it's not applicable to R5.x

[Andrey Pavlov (apavlov-e)]

option use-internal-endpoints (similar to OpenStacks' charms) added for contrail-openstack charm.

https://github.com/Juniper/contrail-charms/commit/15545a66ee28b4e0a1ee15c0904860709e158984