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.. This work is licensed under a Creative Commons Attribution 4.0 International
.. License.
.. http://creativecommons.org/licenses/by/4.0
.. (c) OPNFV, Huawei Technologies Co.,Ltd and others.

===========================
Dovetail Tool Installation
===========================

Abstract
########

The Dovetail tool supports installation either directly on the Linux host, or within a Docker container.
The detailed installation procedure on the Linux host or via the Docker container are shown
in the following sections.

There is a need to config the following parameters before Dovetail tool
running on the SUT (System Under Test):

::

  SUT_TYPE
      SUT type, e.g., apex, compass, fuel, joid, etc
  SUT_IP
      SUT external network IP, e.g., 192.168.200.2
  NODE_NAME
      this can be shown in the test result for users to see which pod the dovetail tool runs
  DEPLOY_SCENARIO
      deployment scenario, e.g., os-nosdn-nofeature-ha
  BUILD_TAG
      this can be shown in the test result for users to identify logs
  CI_DEBUG
      true for debug information printed and false for not printed
  DEPLOY_TYPE
      baremetal or virtual

The above configuration can be achieved by

- modifying the environment variables in files which live under ``/dovetail/conf/`` directory
- set and use Linux environment variables using ``export`` command
- set and use these variables when using ``dovetail run`` command line, for details see the
  `Dovetail Command-line Interface`_ section
- enable the OpenStack credential file, which can be achieved by using
  ``dovetail run --creds </path/creds>``


Dovetail tool installation on local Linux host environment
##########################################################

In order to install Dovetail into a local Linux host environment, the following steps should
be performed:

Downloading Dovetail tool
--------------------------

Source code downloading:

::

  git clone https://git.opnfv.org/dovetail

Environment preparation
-----------------------

Dovetail configuration:

::

  cd {dovetail_path}/dovetail/conf
  vim functest_config.yml
  vim yardstick_config.yml

To modify the ``envs`` parameters, e.g., SUT_TYPE, SUT_IP, NODE_NAME,
DEPLOY_SCENARIO, BUILD_TAG, CI_DEBUG, DEPLOY_TYPE, in the yml files.

System dependencies and project configuration information are listed in
``requirements.txt``, ``setup.py`` and ``setup.cfg``, in Ubuntu environment,
to run

::

  apt-get -y install python-pip
  pip install -e .

in ``centos`` and ``redhat`` environment, to run

::

  yum -y install python-pip
  pip install -e .

in ``fedora`` environment, to run


::

  dnf -y install python-pip
  pip install -e .

then the setup requirements are installed and **dovetail** commmand-line can be used,
by using ``dovetail --help``, **dovetail** command-line details are shown.

The tool ``tox`` is used, which configuration information is defined in
``tox.ini``, unitttest, flake8-checking, coverage check, etc, can be done
by running:

::

  pip install tox
  tox

Compliance and certification test cases
----------------------------------------

The compliance and certification test cases can be defined under the ``/dovetail/compliance``
directory, which is defined in yaml format.
A sample file named ``compliance_set.yml`` is provided as follows:

::

  compliance_set:
    name: compliance_set
    testcases_list:
      - dovetail.ipv6.tc001

The testcase listed here is dovetail.ipv6.tc001, defined within ``dovetail/testcase``.

Running Dovetail tool
---------------------

After environment preparation is complete and test cases added, the Dovetail tool can be run with

::

  dovetail run --testsuite compliance_set

The value ``compliance_set`` passed to the ``testsuite`` flag can be replaced
with the testsuite yaml file name which want to be run.
If no argument is given, the compliance_set testsuite will be run as the default.

Moreover, the testcases in given testarea can be run with ``testarea`` command line argument, such as
testarea ``ipv6`` in ``compliance_set``

::

  dovetail run --testsuite compliance_set --testarea ipv6

Dovetail provides some sets, ``debug``, ``proposed_tests`` and ``compliance_set``,
``debug`` is used for locally and Continuous Integration(CI) developing purpose,
which provides typical testcase examples, feel free to edit it when develops locally, such as
only to run a testcase which only takes minutes. ``proposed_tests`` is the testcase
candidate which mainly comes from the wiki link [1]_.
``compliance_set`` is used for compliance. Moreover, dovetail tool can be easily
extended to support more complicated compliance requirements,
such as feature set based or scenario based compliance.

If you want to run the ``debug`` testsuite, just run with

::

  dovetail run --testsuite debug

Running Dovetail in a Docker container
########################################

The Dovetail tool can be run in a Docker container by utilizing the following steps:

Pull Dovetail Docker image from public Dockerhub
------------------------------------------------

::

  sudo docker pull opnfv/dovetail:<Tag>

<Tag> here is the version, 'latest' is used for the master branch.

(Optional) Create Docker image from Dockerfile
-----------------------------------------------
Instead of an official Docker image, you can build your own Docker image from
Dockerfile(s) located under the ``docker/`` directory. The ``Dockerfile``
is based on Ubuntu and the ``Dockerfile.centos7`` file is for a CentOS based
Docker image.

::

  cd {dovetail_path}/dovetail/docker
  docker build --no-cache -t opnfv/dovetail:<Tag> --build-arg BRANCH=master .

Dovetail Docker container creation
----------------------------------

Next, create the ``dovetail-docker-env`` file to define the environment parameters ::

  INSTALLER_TYPE=compass
  INSTALLER_IP=192.168.200.2
  DEPLOY_TYPE=baremetal
  DEPLOY_SCENARIO=ha-nosdn
  CI_DEBUG=true

or if an OpenStack credential file is provided.

Then to instantiate the Dovetail Docker container, execute::

    sudo docker run --privileged=true --rm -t \
         --env-file dovetail-docker-env OR </path/creds> \
         -v /home/opnfv/dovetail/results:/home/opnfv/dovetail/results \
         -v /var/run/docker.sock:/var/run/docker.sock \
         --name <Dovetail_Container_Name> (optional) \
         opnfv/dovetail:<Tag> /bin/bash

To attach dovetail container and Running test cases
----------------------------------------------------

Before connecting to the container, you can check the container status by running ::

   sudo docker ps -a

Attach to the container by starting it and obtaining a bash prompt with ::

   sudo docker exec -it <Dovetail_Container_Name>/<Container_Id> bash

Inside the container the following commands can be executed to trigger the testing ::

   dovetail run --testsuite compliance_set

Offline Support
################

There are some SUTs that are isolated from the public internet,
so offline support is needed. The idea is to provide all of the packages of dovetail
release in http://artifacts.opnfv.org, then the user can download and transfer to their inner
development environment.

The packages are shown in [2]_

TO DO: to introduce more when it is mature enough.

Results Output
###############

The running log is stored in ``/home/opnfv/dovetail/results/dovetail.log``.
The compliance report is stored in ``/home/opnfv/dovetail/results/dovetail_report.txt``.

Dovetail Version and Release
############################

Dovetail version information is defined in ``setup.cfg``.
At the time of release, it is the dovetail team's responsibility to set
the ``version`` value in ``setup.cfg``.


.. [1] https://wiki.opnfv.org/display/dovetail/Dovetail+Test+Areas+and+Test+Cases.
.. [2] http://artifacts.opnfv.org/dovetail.html.