System for quickly installing an OpenStack cloud from upstream git for testing and development.
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Sean Mooney 6df5371918 bump guest ram to prevent kernel panics
one observation we had in down stream ci is
sometimes the cirros 0.6.2 image appared to
crash when using 128MB of ram.

upstream we have been dealing with semi random
kernel panics  which are losely corralated with
cinder volume usage.

Recently we optimisted the devstack jobs by using zswap
this has reduced memory pressure in the jobs.

This patch increase the ram allocated to a flavor
to see if we can afford that with the current conncurnace
level in an attempt to reduce kernel panics.

Two new parmaters are added to allow jobs or users
to set the desired ram size.

Change-Id: Ib6a2d5ab61a771d4f85bd2c2412052efadc77ac5
2024-07-12 20:16:06 +01:00
data Fix comment in plugin-registry header 2016-08-31 10:07:06 +10:00
doc Updated from generate-devstack-plugins-list 2024-05-16 02:37:02 +00:00
extras.d Async task support 2021-02-09 15:57:04 -08:00
files Drop remainders of identity API v2.0 references 2024-07-08 18:02:25 +02:00
gate Mostly docs cleanups 2015-03-28 14:35:12 -05:00
inc add ubuntu noble (24.04) support 2024-06-21 16:35:32 +01:00
lib bump guest ram to prevent kernel panics 2024-07-12 20:16:06 +01:00
playbooks Pin tox<4.0.0 for <=stable/zed branch testing 2022-12-09 02:55:08 +00:00
roles Fix performance stats gathering for global VENV 2023-10-23 11:21:24 -07:00
samples Use OS_CLOUD in sample 2023-09-20 11:32:33 +00:00
tests Remove support for opensuse 2023-02-16 12:01:39 +01:00
tools Fix datetime.utcnow() deprecation warning 2024-04-23 15:37:37 -04:00
.gitignore ignore dbcounter sub dirs 2023-10-27 02:38:19 +01:00
.gitreview OpenDev Migration Patch 2019-04-19 19:43:10 +00:00
.mailmap Remove AUTHORS 2014-08-14 13:52:28 +10:00
.zuul.yaml Add devstack-platform-ubuntu-noble to periodic 2024-07-09 17:14:54 +02:00 Drop lib/neutron module 2022-12-16 09:59:11 +01:00
CONTRIBUTING.rst [ussuri][goal] Update contributor documentation 2020-04-23 02:56:13 +00:00
functions Upload images with --file instead of stdin 2024-05-09 10:47:50 -07:00
functions-common Use OSCaaS to speed up devstack runs 2024-05-14 07:30:55 -07:00
FUTURE.rst Document where we are going 2015-02-05 16:20:52 -05:00
HACKING.rst Remove MAINTAINERS.rst 2021-03-05 15:10:19 +00:00
LICENSE Add Apache 2 LICENSE file 2012-04-18 01:45:35 -05:00
Makefile Suppressed echoing of the line. 2016-04-30 14:11:52 +05:30
openrc Drop remainders of identity API v2.0 references 2024-07-08 18:02:25 +02:00
README.rst Drop Fedora support 2023-06-07 15:19:37 +02:00 Remove old comment in 2015-04-17 13:23:25 +10:00 enable openstack-cli-server and other perfromace tunings 2024-06-25 11:01:54 +01:00
stackrc Drop remainders of identity API v2.0 references 2024-07-08 18:02:25 +02:00
tox.ini Uncap bashate 2024-01-29 11:42:32 +09:00 Use OSCaaS to speed up devstack runs 2024-05-14 07:30:55 -07:00

DevStack is a set of scripts and utilities to quickly deploy an OpenStack cloud from git source trees.


  • To quickly build dev OpenStack environments in a clean Ubuntu or RockyLinux environment
  • To describe working configurations of OpenStack (which code branches work together? what do config files look like for those branches?)
  • To make it easier for developers to dive into OpenStack so that they can productively contribute without having to understand every part of the system at once
  • To make it easy to prototype cross-project features
  • To provide an environment for the OpenStack CI testing on every commit to the projects


IMPORTANT: Be sure to carefully read and any other scripts you execute before you run them, as they install software and will alter your networking configuration. We strongly recommend that you run in a clean and disposable vm when you are first getting started.


The DevStack master branch generally points to trunk versions of OpenStack components. For older, stable versions, look for branches named stable/[release] in the DevStack repo. For example, you can do the following to create a Zed OpenStack cloud:

git checkout stable/zed

You can also pick specific OpenStack project releases by setting the appropriate *_BRANCH variables in the localrc section of local.conf (look in stackrc for the default set). Usually just before a release there will be milestone-proposed branches that need to be tested:


Start A Dev Cloud

Installing in a dedicated disposable VM is safer than installing on your dev machine! Plus you can pick one of the supported Linux distros for your VM. To start a dev cloud run the following NOT AS ROOT (see DevStack Execution Environment below for more on user accounts):


When the script finishes executing, you should be able to access OpenStack endpoints, like so:

We also provide an environment file that you can use to interact with your cloud via CLI:

# source openrc file to load your environment with OpenStack CLI creds
. openrc
# list instances
openstack server list

DevStack Execution Environment

DevStack runs rampant over the system it runs on, installing things and uninstalling other things. Running this on a system you care about is a recipe for disappointment, or worse. Alas, we're all in the virtualization business here, so run it in a VM. And take advantage of the snapshot capabilities of your hypervisor of choice to reduce testing cycle times. You might even save enough time to write one more feature before the next feature freeze... needs to have root access for a lot of tasks, but uses sudo for all of those tasks. However, it needs to be not-root for most of its work and for all of the OpenStack services. specifically does not run if started as root.

DevStack will not automatically create the user, but provides a helper script in tools/ Run that (as root!) or just check it out to see what DevStack's expectations are for the account it runs under. Many people simply use their usual login (the default 'ubuntu' login on a UEC image for example).


DevStack can be extensively configured via the configuration file local.conf. It is likely that you will need to provide and modify this file if you want anything other than the most basic setup. Start by reading the configuration guide for details of the configuration file and the many available options.