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Docker image builder for Openstack python clients

Project description

Docker image builder for Openstack clients (aka OSCs docker builder)
====================================================================

|Latest Version| |Downloads| |Code Issues| |CircleCI|


A lot of people need install/update/upgrade/downgrade any Openstack
python client in any time. Within Docker containers is easy to get an
isolated environment with all Openstack clients that you wish, for a
specific release from upstream .

Pre-requisites
==============

Openstack python clients project should have following prerequisites :

- docker image: Ensure that there is an official python docker image
for provided python version parameter.
- tox : All clients are using tox, and python version parameter will be
matched in env list.
- common release: All clients have to have same release, in other case
you must specify different release for a client by property 'release'
in the osc.yml file to override global release parameter. For
example, in the osc.yml you can see that client gnocchi has 'master'
release instead of 'stable/newton'.

Build a docker image with OSCs
==============================

This module can be installed by pip:

::

$ pip install osc-docker-builder

Best way to get help about the command is :

::

osc-builder --help
usage: ocs [-h] [-bp BUILD_PATH] [-f CONFIG_FILE] [-pv PYTHON_VERSION]
[-r RELEASE] [-c CLIENTS] [-sf] [-v]

Build a docker image with all Openstack clients that you want for a specific
upstream branch and python version

optional arguments:
-h, --help show this help message and exit
-bp BUILD_PATH, --build-path BUILD_PATH
The build path where files are written.
-f CONFIG_FILE, --config-file CONFIG_FILE
A YAML config file.
-pv PYTHON_VERSION, --python-version PYTHON_VERSION
Python version for docker image
base(https://hub.docker.com/_/python/).For example :
2.7, 3.5.2
-r RELEASE, --release RELEASE
Upstream release.
-c CLIENTS, --clients CLIENTS
Provide all openstack python clients that you want.By
defaults only python-openstackclient will be
installed.
-sf, --skip-fails Skip failures and create the image.
-v, --verbose Show details.


Ready for action ?, suppose that you want to create a docker image for
these python version and Openstack clients:

::

osc-builder --python-version 3.4 --clients openstack --clients heat --release stable/newton --build-path /tmp/osc-docker-builder

I recommend you to use a config file (which you could watch under
version control system):

::

osc-builder -f osc.yml


This command can be launched form source code, main function is in osc_docker_builder package :

::

$ osc.py -f osc.yml -bp /tmp/osc-builder


As command execution output we have a docker image ready to be used.
Push your images to your private registry or use my images at "engapa"
account in dockerhub.com

Running and using docker container
====================

For example, run a container based on latest image for python client 2.7
and release stable/newton :

::

$ docker run -it -d --name osc engapa/osc:2.7-stable_newton-latest
1f395d7273b99b734725fcbab4ebd05082f21978e0c4e3104cc8332c7430920d
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1f395d7273b9 engapa/osc:2.7-stable_newton-latest "/bin/bash" 2 seconds ago Up 3 seconds osc

Let's see , for example, the version of the Heat client installed in this
container:

::

$ docker exec -it 1f395d7273b9 /bin/bash -c "heat --version"
1.5.0

If you prefer operate into the container :

::

$ docker attach 1f395d7273b9
root@1f395d7273b9:# pip list --format columns | grep -i "^python-.*client"
python-openstackclient 3.2.1.dev10 /src/python-openstackclient
python-saharaclient 0.18.1.dev1 /src/python-saharaclient
python-searchlightclient 1.0.1.dev1 /src/python-searchlightclient
python-senlinclient 1.0.1.dev14 /src/python-senlinclient
python-solumclient 2.1.2.dev2 /src/python-solumclient
python-swiftclient 3.1.1.dev1 /src/python-swiftclient
...
root@1f395d7273b9:/#


If you want to update all python client versions (if provided release was a branch , i.e : master) just execute this command into the container:

::

$ docker attach 1f395d7273b9
root@1f395d7273b9:/root# pip install -U -r requirements.txt


An interesting module of openstack is 'os-client-config', it aims you to use a cloud configuration file shared by volume mount point (at "/root", "/root/.config/openstack" or "/etc/openstack" directory):

::

$ cat << EOF > cloud.yml
> clouds:
> spaincloud:
> auth:
> username: engapa
> password: XXXXXXXXX
> project_name: OSOOS
> auth_url: 'https://spaincloud.com:5001/v2.0'
> region_name: SpainSalamanca
> dns_api_version: 1
> EOF
$ docker run -it --name osc -v $(pwd)/clouds.yml:/root/.config/openstack/clouds.yml engapa/osc:2.7-stable_newton-latest
root@1536ac361c6c:~# openstack --os-cloud spaincloud server list
...


Developer mode
==============

Main tasks with code are managed by
`tox <https://tox.readthedocs.io/en/latest/>`__

To get a local virtualenv just type (for python 3.4 use "-e py34"
argument):

::

$ tox -r -e pep8,py27
pep8 recreate: /Users/engapa/Projects/BBVA/EuroCloud/git/osc-docker-builder/.tox/pep8
pep8 installdeps: flake8
pep8 installed: configparser==3.5.0,enum34==1.1.6,flake8==3.2.1,mccabe==0.5.2,pycodestyle==2.2.0,pyflakes==1.3.0,wheel==0.24.0
pep8 runtests: PYTHONHASHSEED='775912511'
pep8 runtests: commands[0] | flake8
0
py27 recreate: /Users/engapa/Projects/BBVA/EuroCloud/git/osc-docker-builder/.tox/py27
py27 installdeps: -r/Users/engapa/Projects/BBVA/EuroCloud/git/osc-docker-builder/requirements.txt, -r/Users/engapa/Projects/BBVA/EuroCloud/git/osc-docker-builder/test-requirements.txt
py27 develop-inst: /Users/engapa/Projects/BBVA/EuroCloud/git/osc-docker-builder
py27 installed: coverage==4.2,funcsigs==1.0.2,Jinja2==2.8,MarkupSafe==0.23,mock==2.0.0,mox==0.5.3,nose==1.3.7,-e git+git@github.com:engapa/osc-docker-builder.git@f96c66520e4596e84ec423127a0528675efefd88#egg=osc_docker_builder-master,pbr==1.10.0,pluggy==0.4.0,py==1.4.31,PyYAML==3.12,six==1.10.0,tox==2.5.0,virtualenv==15.1.0,wheel==0.24.0
py27 runtests: PYTHONHASHSEED='775912511'
py27 runtests: commands[0] | python setup.py nosetests
running nosetests
running egg_info
writing osc_docker_builder.egg-info/PKG-INFO
writing top-level names to osc_docker_builder.egg-info/top_level.txt
writing dependency_links to osc_docker_builder.egg-info/dependency_links.txt
writing entry points to osc_docker_builder.egg-info/entry_points.txt
reading manifest file 'osc_docker_builder.egg-info/SOURCES.txt'
writing manifest file 'osc_docker_builder.egg-info/SOURCES.txt'

Name Stmts Miss Cover
-----------------------------------------------
osc_docker_builder.py 0 0 100%
osc_docker_builder/osc.py 129 102 70%
-----------------------------------------------
TOTAL 129 102 70%
----------------------------------------------------------------------
Ran 0 tests in 0.097s

OK
___________________________________________________________________________ summary ____________________________________________________________________________
pep8: commands succeeded
py27: commands succeeded
congratulations :)

Load the virtualenv and build a docker image by :

::

$ source .tox/py27/bin/activate
$(py27) osc-builder -f osc.yml


Author
======

Enrique Garcia Pablos engapa@gmail.com

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