Normally, when you launch a Docker container, the process you're
executing becomes PID 1, giving it the quirks and responsibilities that
come with being the init system for the container.

There are two common issues this presents:

* In most cases, signals won't be handled properly.
* Orphaned zombie processes aren't properly reaped.

the dumb-init acting like a simple init system. It launches a single
process and then proxies all received signals to a session rooted at
that child process.

Closes-Bug: #1614509
Change-Id: I9d3d04648e151ddc7c6732b92ffd3b6c9fe467ec

There were some problems in the documentaiton that
prevented tox -e docs from working.  Also changed
attention to WARNING since attention was not as eye-grabbing
as I'd hoped during a previous review.

Change-Id: I2b661afa2cd4a4331bbcc99240d3e127a5d94a11

Upgrade Ubuntu base image to Xenial

Closes-Bug: #1593599
Change-Id: I5832a729a9a4fa73c02442047c92ba088ce20db3

In CI environment, MySQL-python wheel package has a wrong _mysql.so
file, which is not compatible with Ubuntu.

Disable wheel index in the CI for pip.

Closes-Bug: #1615231
Change-Id: I127ebb017e09a5bf245e0fdad9bf052203e68e55

TrivialFix

Change-Id: Ib2474257554e0b294bc39a658108326fcbbdbe58

The location for the Kolla configurations in the workflow for evaluation
needs to be fixed correctly to /usr/share/kolla/etc_examples

This was brought up on IRC -
http://eavesdrop.openstack.org/irclogs/%23openstack-kolla/%23openstack-kolla.2016-08-18.log.html#t2016-08-18T21:02:18

Change-Id: Ie9f651308a7b51cfd3ad1c617637bab1b5cc568e

Currently if the install_packages macro is run with an empty
package list, it will add a yum or apt-get command with no
packages listed.

This bug fix aims to omit this line when no packages have
been given, or, the operator wants to use the "_override" /
"_remove" functionality to disable all packages being
installed in a Dockerfile.

Co-Authored-By: Paul Bourke <paul.bourke@oracle.com>
Change-Id: Ifaaaebfccc3adb0f2f68a35ac08e59378bc87fdb
Closes-bug: 1612446

Add the following prechecks for network_interface:

* Check it exists on the node
* Check its up
* Check it has an IP associated

TrivialFix
Change-Id: I86f1d79d8592a3b108822e7d19541f91a1c0d716
Co-Authored-By: James McCarthy <james.m.mccarthy@oracle.com>

Change-Id: Ic5710257758d3b6c8655443a5498cfa64d756263

Change-Id: I30c4d7929940c751bf88c4bf9a0e200025ebd5c8
Partially-Implements: blueprint enable-congress-container

TrivialFix

Change-Id: I735091c4d044344361e604014f3877b608223204