kolla-ansible/docs/dev-quickstart.rst

Quickstart to Deploying OpenStack using Ansible

Evaluation and Developer Environments

Two virtualized evaluation and development environment options are available. These options permit the evaluation of Kolla without disrupting the host operating system.

If developing or evaluating Kolla on an OpenStack cloud environment that supports Heat, follow the Heat evaluation and developer environment guide.

If developing or evaluating Kolla on a system that provides VirtualBox, Vagrant may be used and is documented in the Vagrant evaluation and developer environment guide.

If evaluating or deploying OpenStack on bare-metal with Kolla, follow the instructions in this document to get started.

Installing Dependencies

Kolla will not run on Fedora 22 or later currently. Fedora 22 compresses kernel modules with the .xz compressed format. The guestfs system in the CentOS family of containers cannot read these images because a dependent package supermin in CentOS needs to be updated to add .xz compressed format support.

On the deployment host Ansible>=1.8.4 must be installed and is the only requirement for deploying OpenStack. To build the Docker container images locally the dependnencies docker>=1.7.0 and the Python libraries docker-py>=1.2.0 and Jinja2>=2.6 must be installed.

The deployment targt nodes require the installation of docker>=1.7.0 and docker-py>=1.2.0.

To install Kolla Python depenedencies use:

git clone http://github.com/stackforge/kolla
cd kolla
sudo pip install -r requirements.txt

Since Docker is required to build images as well as be present on all deployed targets, the Kolla community recommends installing the Docker Inc. packaged version of Docker for maximum stability and compatiblity with the following command:

curl -sSL https://get.docker.io | bash

For Ubuntu based systems where Docker is used, do not use AUFS when starting Docker daemon unless you are running the Utopic (3.19) kernel. AUFS requires CONFIG_AUFS_XATTR=y set when building the kernel. On Ubuntu, versions prior to 3.19 did not set this flag to be compatible with Docker. If unable to upgrade the kernel, the Kolla community recommends using a different storage backend such as btrfs.

On the system where the OpenStack CLI/Python code is run, the Kolla community recommends installing the OpenStack python clients if they are not installed. This could be a completely different machine then the deployment host or deployment targets. To install these clients use:

sudo pip install -U python-openstackclient

Libvirt is started by default on many operating systems. Please disable libvirt on any machines that will be deployment targets. Only one copy of libvirt may be running at a time.

service libvirtd disable
service libvirtd stop

Kolla deploys OpenStack using Ansible. Install Ansible from distribution packaging if the distro packaging has 1.8.4 or greater available. Currently Ubuntu's version of Ansible is too old to use from packaging. On RPM based systems install from packaging using:

yum -y install ansible

On DEB based systems this can be done using:

apt-get install ansible

If the distro packaged version of Ansible is too old, install Ansible using pip:

pip install -U ansible

Buildling Container Images

The Kolla community does not currently generate new images for each commit to the repository. The push time for a full image build to the docker registry is about 5 hours on 100mbit Internet, so there are technical limitations to using the Docker Hub registry with our current OpenStack CI/CD systems.

The Kolla community builds and pushes tested images for each tagged release of Kolla, but if running from master, it is recommended to build images locally. All Docker images can be built as follows:

tools/build.py -T 1000

The -T option specifies how many threads to run concurrently. A docker build of all containers on Xeon hardware with SSDs and 100mbit network takes roughly 15 minutes. The CentOS mirrors are flakey and the RDO delorean repository is not mirrored at all. As a result occasionally some containers will fail to build. If something important fails to bulid, repeat the entire build process again. The Kolla community recognizes this is not ideal and the Kolla community is adding an individual container build option to solve this particular problem.

Starting Kolla

Configure Ansible by reading the Kolla Ansible configuration Guide documentation.

Finally, run the deploy operation:

$ sudo ./tools/kolla-ansible deploy

A bare metal system takes three minutes to deploy AIO. A virtual machine deployment takes five minutes to deploy AIO. These are estimates; different hardware may be faster or slower but should be near these results.

Debugging Kolla

The container's status can be determined on the deployment targets by executing:

$ docker ps -a

If any of the containers exited, this indicates a bug in the container. Please seek help by filing a bug or contacting the developers via IRC.

the logs can be examined by executing:

$ docker logs <container-name>

Note some of the containers don't log to stdout at present so the above command will provide no information. Instead they log to files in _/var/log/_<service> inside the container. The Kolla community is working to improve auditing and make things more consistent. The Kolla community expects this work to complete by Liberty rc1. An example of reading the logs for nova-api:

::

$ docker exec -t nova_api more /var/log/nova/nova-api.log

Note reading the logs via an exec operation can only be done if the container is running.