cf81958f66
If an operator wants to deploy a single node (e.g. add an additional
compute), they may want to use the --limit feature of Ansible to avoid
waiting for every play across every node.
The problem with this is that --limit will gather facts for that node
only, causing template errors such as the infamous ('dict object' has no
attribute u'ansible_eth0'").
Ansible has catered to this problem to an extent with it's
"delegate_facts" mechanism. The only problem is that in the default 'all
nodes' case, we end up with a storm of SSHs as each node SSHs to every
other. I'm solving this with a separate task to only use this mechanism
when a subset of nodes has been specified (see ansible_play_batch).
Useful links on this subject:
- https://medium.com/@george.shuklin/perfecting-forced-fact-gathering-in-ansible-1611f9c8d0d5#.tr5zs3e7x
- http://docs.ansible.com/ansible/playbooks_delegation.html#delegated-facts
Change-Id: Ibb691eae15cacd9e5129ae9280fd296f5ba95940
Closes-Bug: 1642004
Kolla Overview
The Kolla project is a member of the OpenStack Big Tent Governance.
Kolla's mission statement is:
To provide production-ready containers and deployment tools for operating
OpenStack clouds.Kolla provides Docker containers and Ansible playbooks to meet Kolla's mission.
Kolla is highly opinionated out of the box, but allows for complete customization. This permits operators with little experience to deploy OpenStack quickly and as experience grows modify the OpenStack configuration to suit the operator's exact requirements.
Getting Started
Learn about Kolla by reading the documentation online docs.openstack.org.
Get started by reading the Developer Quickstart.
Docker images
The Docker images are built by the Kolla project maintainers. A detailed process for contributing to the images can be found in the image building guide.
The Kolla developers build images in the kolla namespace for every tagged release and implement an Ansible roles for many but not all of them.
You can view the available images on Docker Hub or with the Docker CLI:
$ sudo docker search kollaOpenStack services
Kolla provides images to deploy the following OpenStack projects:
- Aodh
- Barbican
- Bifrost
- Ceilometer
- Cinder
- CloudKitty
- Congress
- Designate
- Freezer
- Glance
- Gnocchi
- Heat
- Horizon
- Ironic
- Keystone
- Kuryr
- Magnum
- Manila
- Mistral
- Murano
- Neutron
- Nova
- Panko
- Rally
- Sahara
- Searchlight
- Senlin
- Solum
- Swift
- Tempest
- Trove
- Vmtp
- Watcher
- Zaqar
Infrastructure components
Kolla provides images to deploy the following infrastructure components:
- Ceph implementation for Cinder, Glance and Nova
- collectd, InfluxDB, and Grafana for performance monitoring.
- Elasticsearch and
-
Kibana to search, analyze, and visualize log messages.
- HAProxy and Keepalived for high availability of services and their endpoints.
- Heka A distributed and scalable logging system for OpenStack services.
- MariaDB and Galera Cluster for highly available MySQL databases
- MongoDB as a database backend for Ceilometer and Gnocchi
- Open vSwitch and Linuxbridge backends for Neutron
- RabbitMQ as a messaging backend for communication between services.
Directories
ansible- Contains Ansible playbooks to deploy Kolla in Docker containers.contrib- Contains demos scenarios for Heat and Murano and a development environment for Vagrantdoc- Contains documentation.docker- Contains jinja2 templates for the docker build system.etc- Contains a reference etc directory structure which requires configuration of a small number of configuration variables to achieve a working All-in-One (AIO) deployment.tests- Contains functional testing tools.tools- Contains tools for interacting with Kolla.specs- Contains the Kolla communities key arguments about architectural shifts in the code base.
Getting Involved
Need a feature? Find a bug? Let us know! Contributions are much appreciated and should follow the standard Gerrit workflow.
- We communicate using the #openstack-kolla irc channel.
- File bugs, blueprints, track releases, etc on Launchpad.
- Attend weekly meetings.
- Contribute code.
Contributors
Check out who's contributing code and contributing reviews.