The nova [neutron]/url config option was deprecated in Queens [1]
and is being removed in Train [2]. The neutron install guide
sections about configuring compute to work with neutron were still
using the url option so this change removes them. There are a few
things to note here:
1. The url option functionality is replaced with the endpoint_override
option from keystoneauth1 but we don't really want users using that
unless there is a real need. One of the main reasons for moving the
nova configuration to use keystoneauth1 was so that the network
service endpoint can be looked up via KSA dynamically based on the
configurable interfaces (public, internal, private) and service types
authority so the endpoint URL will just be pulled from the service
catalog. That means not having to hard-code the endpoint URL in nova
config which makes deployment and config management simpler. As such,
the url option removed in the install guide here is not replaced with
the endpoint_override option.
2. Following on #1, the install guide portion about the nova/neutron config
is updated with a link back to the nova config guide for the full set
of options in case an operator needs to tweak the config, e.g. to set
valid_interfaces or endpoint_override because the KSA defaults don't work
for their deployment.
3. With the old url option, if region_name was not specified, nova would
default to 'RegionOne'. That is not the case if not using the url option
so we leave the region_one config in the install guide example, otherwise
region_name would default to None.
[1] I41724a612a5f3eabd504f3eaa9d2f9d141ca3f69
[2] I6c068a84c4c0bd88f088f9328d7897bfc1f843f1
Change-Id: I30445edeb8509330571db28c7d61dd63886e9e61
Closes-Bug: #1840930
e8653f28de