We want to allow operators to override Horizon's default
settings. This involves moving local_settings.d out of the read only
snap filesystem, and into $SNAP_COMMON. This is a little bit tricky.

First, we patch settings.py and local_settings.py as we're building the
snap, to include a LOCAL_PATH in $SNAP_COMMON.

Then, we add a template with the rest of our default overrides,
and write it out to $SNAP_COMMON/horizon/local_settings.d

Finally we tweak our tests so that we can give our overrides a
spin. As a bonus, this makes test_horizonglogin.py a lot easier to run
in our multipass testing scenario!

`tox -e basic` now also runs selenium tests, as well.

Change-Id: Ic0ce18cfa1b97a93191da749095d8aa2270d5aeb

Port the python2.7 local settings overrides to the python3.6 directory
structure.

Move all local_settings.py overrides into _05_snap_tweaks.py as part
of troubleshooting some remaining problems. Everything is more
organized and functional now :-)

Added selenium tests.

Change-Id: I54923e1dc9c7ffa47c2ef6fb90ea9d224b0d2eee

Written in Python. Easier to maintain. Easier to make interactive.

Change-Id: Ib579b43c1564b55165de5c2f3d20387122448b19

Renamed the old and outdated "configure-openstack" script to "init.sh"

Updated init.sh and folded most of the configure hook into it.

Removed database installation step from install hook.

We can now install microstack without a database dump, which helps
immensely in updating. And we have a logical place to put additional
configuraiton, including some of the manual steps in DEMO.md, which
could be scripted if we gave users a chance to skip the system changes
that they wanted to skip.

Also updated README and DEMO file to match new flow. Updated test
files.

Future cleanup and features documented in Trello, but not included in
this PR, which is big enough already :-)

Change-Id: I8d926a8b463124494ddb7a4696adbe86f89db7d5

Moved openstack env variables out of snapcraft.yaml, and into a
"microtack.rc".

Made openstack-wrapper, which auto sources microstack.rc.

Key off of revised snap.openstack, which supports snapctl config
values in templates. Moved a lot of the overlay into
snap-overlay/templates, and added config values to them. Also writes
templates just once, when you run snap-openstack setup.

Change-Id: Ib0f2e3fc97f491d9ed9dfbafc61dc8e27a8a2b48

Tweaked tests/basic_test.sh functional test so that it no longer
requires multpass, and can run without kvm cpu extensions being
enabled (not all machines in the game have cpu extensions.)

Added tox.ini, wrapper script for building and installation, etc.

Change-Id: I968116dd7bec412a55813c896d60cfc86c7070db

* Cruft cleanup.

Organized snapcraft.yaml better, and got rid of unecessary bits.

* Cleaned up scripts.

Moved launch.sh into snap-overlay, to be more consistent with
everything else.

Got rid of outdated and confusing configure-the-things script.

* Clarified a comment.

* Got rid of erroneous config file.

* Undeleted config file -- wasn't erroneous!

Refactor snap to work with core18.

Giving the snapcraft.yaml a base property helps tremendously with the
efficiency of the build process, and I believe that it puts us in a
better position to reliably support non Ubuntu distros going forward.

This also bases us on long supported bionic libraries, and gives us a
nice place to work from as we add Python 3 and Stein support, as well
as general polish and fixes.

Dropped a command to change the endpoints from localhost to 10.20.20.1
in the configure hook.

This is a temporary solution, pending automation of the database
update. (I was burning too much time getting a manual dump to work for
now.)

Updated the mysql tarball, which has the localhost -> 10.20.20.1
update.

Test for pinging Internet was failing due to not waiting long enough,
so added a proper retry strategy.

Addresses the issue where services such as a juju controller cannot
access endpoints from within an instance.

Updated all references to localhost to 10.20.20.1, and added the
address to ALLOWED_HOSTS.

Also updated version of qemu lib.

Fixes lp#1812415

Prior to this fix, instances spun up by microstack could not
successfully route to and from the Internet. Setting a rule for ipv4
forwarding and iptables rules for the nat fix the issue.

This is a bandaid for
https://github.com/CanonicalLtd/microstack/issues/39, where switching
to the material theme can get your GUI stuck in an errored
state. We'll re-enable everything once that bug is fixed.

These settings are less performant, but more universally compatible.

A seperate task would be to expose these settings via the snap config,
in some sensible way. For now, this means that microstack will "just
work" in more places.

This fixes an issue where we weren't creating a netplan config and/or
and entry in /etc/network/interfaces for br-ex, and thus losing
external access to our virtual networks after reboot.

Since we don't actually want to touch the host system's networking
config, we just drop a oneshot daemon into place that sets br-ex up
each time the snap services are started.

* Preseed mysql data dir with something useful

* Configure fernet keys on first install

* Update overlay

* Ensure image is synced

* Preseed mysql data dir with something useful

* Configure fernet keys on first install

* Update missing instances directory

* Updated mysql.tar.xz

* Folded configure command into configure hook.

Fixed dashboard errors.

Added a proper uwsgi script with matching .ini templates.

Added django settings files that fix issues with Django attempting to write files to the read only snap filesystem, and generally make things work well in the snap.

Fixed snap-openstack.yaml entries so that our file and directory setup is accurate.