Kevin Carter 8e6dbd01c9 Convert existing roles into galaxy roles

This change implements the blueprint to convert all roles and plays into
a more generic setup, following upstream ansible best practices.

Items Changed:
* All tasks have tags.
* All roles use namespaced variables.
* All redundant tasks within a given play and role have been removed.
* All of the repetitive plays have been removed in-favor of a more
  simplistic approach. This change duplicates code within the roles but
  ensures that the roles only ever run within their own scope.
* All roles have been built using an ansible galaxy syntax.
* The `*requirement.txt` files have been reformatted follow upstream
  Openstack practices.
* Dynamically generated inventory is now more organized, this should assist
  anyone who may want or need to dive into the JSON blob that is created.
  In the inventory a properties field is used for items that customize containers
  within the inventory.
* The environment map has been modified to support additional host groups to
  enable the seperation of infrastructure pieces. While the old infra_hosts group
  will still work this change allows for groups to be divided up into seperate
  chunks; eg: deployment of a swift only stack.
* The LXC logic now exists within the plays.
* etc/openstack_deploy/user_variables.yml has all password/token
  variables extracted into the separate file
  etc/openstack_deploy/user_secrets.yml in order to allow seperate
  security settings on that file.

Items Excised:
* All of the roles have had the LXC logic removed from within them which
  should allow roles to be consumed outside of the `os-ansible-deployment`
  reference architecture.

Note:
* the directory rpc_deployment still exists and is presently pointed at plays
  containing a deprecation warning instructing the user to move to the standard
  playbooks directory.
* While all of the rackspace specific components and variables have been removed
  and or were refactored the repository still relies on an upstream mirror of
  Openstack built python files and container images. This upstream mirror is hosted
  at rackspace at "http://rpc-repo.rackspace.com" though this is
  not locked to and or tied to rackspace specific installations. This repository
  contains all of the needed code to create and/or clone your own mirror.

DocImpact
Co-Authored-By: Jesse Pretorius <jesse.pretorius@rackspace.co.uk>
Closes-Bug: #1403676
Implements: blueprint galaxy-roles
Change-Id: I03df3328b7655f0cc9e43ba83b02623d038d214e

2015-02-18 10:56:25 +00:00

4.1 KiB

Raw Blame History

OpenStack Ansible Deployment

date: 2015-02-02 22:00
tags: lxc, openstack, cloud, ansible
category: *nix

Playbooks

There are several playbooks within that will setup hosts for use in OpenStack Cloud. The playbooks will enable LXC on hosts and provides the ability to deploy LXC containers for use within openstack.

Plays:

setup-hosts.yml Performs host setup for use with LXC in the OpenStack hosts.
setup-infrastructure.yml Performs all of the setup for all infrastructure components.
setup-openstack.yml Performs all of the setup for all of the OpenStack components.

If you dont want to run plays individually you can simply run setup-everything.yml which will perform all of the setup and installation for you.

Basic Setup:

If you have any roles that you'd like to have pulled in that are outside the scope and or replace modules within this repository please add them to the ansible-role-requirements.yml file. In this file you will want to fill in the details for the role you want to pull in using standard ansible galaxy format.

- name: SuperAwesomeModule
  src: https://github.com/super-user/SuperAwesomeModule
  version: master

Run the ./scripts/os-ansible-bootstrap.sh script, which will install, pip, ansible 1.8.x, all of the required python packages, and bring in any third part ansible roles that you may want to add to the deployment.
Copy the etc/openstack_deploy directory to /etc/openstack_deploy or if you are executing all of this as an unprivileged user you can add the openstack_deploy bits into your home directory as ${HOME}/.openstack_deploy.
Fill in your openstack_deploy/openstack_user_config.yml, openstack_deploy/user_secrets.yml and openstack_deploy/user_variables.yml files which you've just copied to your /etc/ directory or your ${HOME} folder.
Generate all of your random passwords executing scripts/pw-token-gen.py --file /etc/openstack_deploy/user_secrets.yml.
Accomplish all of the host networking that you want to use within the deployment. See the etc/network directory in this repository for an example network setup.
When ready change to the playbooks/ directory and execute your desired plays. IE:

openstack-ansible setup-everything.yml

Notes

If you run the ./scripts/bootstrap-ansible.sh script a wrapper script will be added to your system that wraps the ansible-playbook command to simplify the arguments required to run openstack ansible plays. The name of the wrapper script is openstack-ansible.
The lxc network is created within the lxcbr0 interface. This supports both NAT networks as well as more traditional networking. If NAT is enabled (default) the IPtables rules will be created along with the interface as a post-up processes. If you ever need to recreate the rules and or restart the dnsmask process you can bounce the interface IE: ifdown lxcb0; ifup lxcbr0 or you can use the lxc-system-manage command.
The tool lxc-system-manage is available on all lxc hosts and can assist in recreating parts of the LXC system whenever its needed.
Our repository uses a custom LXC module which adds lxc: support to Ansible. The module within this repository is presently pending in upstream ansible at "https://github.com/ansible/ansible-modules-extras/pull/123".
Inventory is generated by executing the playbooks/inventory/dynamic_inventory.py script. This is configured in the playbooks/ansible.cfg file.

Bugs and Blueprints

Everything we do is in launchpad and gerrit. If you'd like to raise a bug, feature request, or are looking for ways to contribute please go to "https://launchpad.net/openstack-ansible".

Official Documentation

Comprehensive installation guides, including FAQs and release notes, can be found at "http://docs.rackspace.com/rpc/api/v9/bk-rpc-installation/content/rpc-common-front.html" < Note that these docs may not be up-to-date with the current release of this repository however they are still a good source of documentation.