refer to:
https://docs.openstack.org/contributor-guide/writing-style/ \
code-conventions.html

Change-Id: I0d4c741b40bb2e028dfb2167dd34ced188a4d71e

changes all headings which were lacking the style

Change-Id: Ifdf51c33211f94eadbef588e929940727e4405a6

Update comments and add enable_haproxy to let helpinners know how
to set kolla_internal_vip_address and deploy AIO OpenStack without
haproxy correctly.

As a beginner in kolla-ansible, current comments for
kolla_internal_vip_address let me belive that if I set it to my eth0 ip,
kolla-ansible will help deploy an AIO OpenStack without haproxy. But in
fact it throws an error, I get the right way after searching IRC log.

Change-Id: I1ba1ffe774ad0cf29543523a56854b9d7caa680a

Create demo SFC environment.
Usage docs will be added in a global tacker
documentation PS.

Change-Id: Ia8fe54a1657e76c090b3f6f03bb13d53cf8ac2f2

The docker-py python module is now called docker and has an
incompatible api. Running latest kolla-ansible with docker-py
will throw an error like this:
AttributeError: 'module' object has no attribute 'APIClient'

Change-Id: Idd10735c764717cf711f62b3243d39d8c8ed263f

* Magnum and Tacker demos scenarios have been introduced
* Murano demos scenarios don't exist

Change-Id: I4ad20e5b5124e74075c95df7e891501988a6c1a1

Redis infra component has been introduced during commit
e3423bea.

Change-Id: I26395fea6e2f888478d9363693a68ca7905d6381

Zaqar role is not implemented.

Change-Id: I6bb95de7284a24d3123f611aa4f1b6e738d56b5d

Tacker has become a complex service to deploy in pike
release, adding a bunch of other services dependencies.
This guide aims to ease users to deploy tacker.

Change-Id: Ibe15bee9438fed0cd09b3cabcb270b551fb13b87

Mistral requires redis as of pike release,
notify users about this new feature and make sure
updrades enables redis.

Change-Id: I41e82869d036673181b4dba05ad07089691d0357

* Remove redundant info, e.g. 'kolla can deploy the cinder services'

* List the available backends Kolla supports

* The bug wrt to lvm with multiple control nodes is open rather than
  'WontFix', update the note to reflect this.

* Document how to configure the NFS backend

Change-Id: I1621efa35a329676ecaf309d60f578d33d8aa0d4

Fix many warnings in vmware docs for
D001 Line too long.

Change-Id: I695f7fb958ec12161a13cf51f0297f50d9177d73

modify /etc/kolla/config/cinder/ceph.conf,
run kolla-ansible reconfigure but
in the container /etc/ceph.conf has not changed

Change-Id: I3bd55f76295b9ad1b799db9e910dbd0cd03d417c

Add ceilometer heat multi-regions content in multi-regions.rst

Change-Id: I9bc3d2a3ff25cee2d5e6d5318cffe6d65e4220b6

Precheck will fail when swift ring files do not exists.

Change-Id: I20e7c9dbe527015ac2b01e85907637feb0deacbc

Rollout redis container in master/slave configuration

Deploy redis-sentinel and connect to redis cluster
Redis is needed for mistral coordination backend.

Partial-Bug: #1700591
Change-Id: Ic0269d0db10624925e7bcdbf0e33ae87b84a9cf2

 Upgrade fails as outward_rabbitmq does not exist
 and cannot therefore be upgraded. Omit it from the
 upgrade check and bootstrap it after rabbitmq upgrade.

 Remove jinja2 from 'Find gospel node' task; removes warnings.

Change-Id: I3766271c62779c8dbd31e7cf2300473815bbbe68