zun/doc/source/dev/quickstart.rst

Developer Quick-Start

This is a quick walkthrough to get you started developing code for Zun. This assumes you are already familiar with submitting code reviews to an OpenStack project.

http://docs.openstack.org/infra/manual/developers.html

Setup Dev Environment

Install OS-specific prerequisites:

# Ubuntu/Debian:
sudo apt-get update
sudo apt-get install -y libmysqlclient-dev build-essential python-dev \
                        python3.4-dev git

Install pip:

curl -s https://bootstrap.pypa.io/get-pip.py | sudo python

Install common prerequisites:

sudo pip install virtualenv flake8 tox testrepository git-review

You may need to explicitly upgrade virtualenv if you've installed the one from your OS distribution and it is too old (tox will complain). You can upgrade it individually, if you need to:

sudo pip install -U virtualenv

Zun source code should be pulled directly from git:

# from your home or source directory
cd ~
git clone https://git.openstack.org/openstack/zun
cd zun

All unit tests should be run using tox. To run Zun's entire test suite:

# run all tests (unit and pep8)
tox

To run a specific test, use a positional argument for the unit tests:

# run a specific test for Python 2.7
tox -epy27 -- test_conductor

You may pass options to the test programs using positional arguments:

# run all the Python 2.7 unit tests (in parallel!)
tox -epy27 -- --parallel

To run only the pep8/flake8 syntax and style checks:

tox -epep8

Exercising the Services Using Devstack

This session has only been tested on Ubuntu 14.04 (Trusty). We recommend users to select one of it if it is possible.

Clone devstack:

# Create a root directory for devstack if needed
sudo mkdir -p /opt/stack
sudo chown $USER /opt/stack

git clone https://git.openstack.org/openstack-dev/devstack /opt/stack/devstack

We will run devstack with minimal local.conf settings required to enable required OpenStack services:

cat > /opt/stack/devstack/local.conf << END
[[local|localrc]]
HOST_IP=$(ip addr | grep 'state UP' -A2 | tail -n1 | awk '{print $2}' | cut -f1  -d'/')
DATABASE_PASSWORD=password
RABBIT_PASSWORD=password
SERVICE_TOKEN=password
SERVICE_PASSWORD=password
ADMIN_PASSWORD=password
enable_plugin zun https://git.openstack.org/openstack/zun

# Optional:  uncomment to enable the Zun UI plugin in Horizon
# enable_plugin zun-ui https://git.openstack.org/openstack/zun-ui
END

By default, devstack will enable docker driver in Zun. Alternatively, you can enable nova-docker driver instead. If nova-docker driver is enabled, zun will use Nova to manage container sandboxes. Simply speaking, you should choose nova-docker driver if you want to get containers with networking provided by Neutron. Otherwise, choose docker driver:

cat >> /opt/stack/devstack/local.conf << END
ZUN_DRIVER=nova-docker
IP_VERSION=4
disable_service n-net
enable_service q-svc
enable_service q-agt
enable_service q-dhcp
enable_service q-l3
enable_service q-meta
enable_service neutron
END

More devstack configuration information can be found at http://docs.openstack.org/developer/devstack/configuration.html

More neutron configuration information can be found at http://docs.openstack.org/developer/devstack/guides/neutron.html

Run devstack:

cd /opt/stack/devstack
./stack.sh

Prepare your session to be able to use the various openstack clients including nova, neutron, and glance. Create a new shell, and source the devstack openrc script:

source /opt/stack/devstack/openrc admin admin

Using the service

We will create a container that pings the address 8.8.8.8 four times:

zun create --name test --image cirros --command "ping -c 4 8.8.8.8"
zun start test

You should see a similar output to:

zun list
+--------------------------------------+------+---------+--------+-------------------+--------+
| uuid                                 | name | status  | image  | command           | memory |
+--------------------------------------+------+---------+--------+-------------------+--------+
| 010fde12-bcc4-4857-94e3-e3f0e301fc7f | test | Stopped | cirros | ping -c 4 8.8.8.8 | None   |
+--------------------------------------+------+---------+--------+-------------------+--------+

zun logs test
PING 8.8.8.8 (8.8.8.8): 56 data bytes
64 bytes from 8.8.8.8: seq=0 ttl=40 time=25.513 ms
64 bytes from 8.8.8.8: seq=1 ttl=40 time=25.348 ms
64 bytes from 8.8.8.8: seq=2 ttl=40 time=25.226 ms
64 bytes from 8.8.8.8: seq=3 ttl=40 time=25.275 ms

--- 8.8.8.8 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 25.226/25.340/25.513 ms

Delete the container:

zun delete test