0e58d22897
The pre-existing configuration for swift on devstack set's the
*-server's devices option (the root of the servers list of devices) to:
devices = /opt/stack/data/swift/1
where "1" is the node_number, and will be 2, 3, ... N if the devstack
machine is built with more than one swift node/device (pretty sure no
one does that on devstack ever).
The device(s) in the rings are named (perhaps confusingly similar to the
swift loopback image) just "sdb1", so all storage servers expect to have
a $STACK_USER writeable file system at:
os.path.join(<devices_root>, "sdb1")
That directory does not exist when you start up a devstack [1].
Currently Swift's object-server's require that directory exist before
they write data into it (even with mount_check = false!).
Unfortunately however, with mount_check=false the account/container
servers are able to create the device directory when it does not exist
[2]. Which can lead to some unfortunate results with permissions on
some deployments using mount_check = false (e.g. testing or
containerized environments). Fixing this issue [3] uncovered the
previously benign [4] mis-configuration in devstack.
Attempting
1. It was lost a long while ago I7c65303791689523f02e5ae44483a6c50b2eed1e
2. Essentially they want to:
mkdir -p /opt/stack/data/swift/1/sdb1/containers/<part#>
... but end up creating the "sdb1" dir too!
3. I3362a6ebff423016bb367b4b6b322bb41ae08764
4. Benign because the object-server share their device with the
account-container devices and they would create the dirs before trying
to write an object. It was incorrect, but worked by happenstance, which
is nearly as good as worked on purpose.
Change-Id: I52c4ecb70b1ae47e613ba243da5a4d94e5adedf2
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| data | ||
| doc/source | ||
| exercises | ||
| extras.d | ||
| files | ||
| gate | ||
| inc | ||
| lib | ||
| pkg | ||
| samples | ||
| tests | ||
| tools | ||
| .gitignore | ||
| .gitreview | ||
| .mailmap | ||
| clean.sh | ||
| exercise.sh | ||
| exerciserc | ||
| functions | ||
| functions-common | ||
| FUTURE.rst | ||
| HACKING.rst | ||
| LICENSE | ||
| MAINTAINERS.rst | ||
| Makefile | ||
| openrc | ||
| README.rst | ||
| run_tests.sh | ||
| setup.cfg | ||
| setup.py | ||
| stack.sh | ||
| stackrc | ||
| tox.ini | ||
| unstack.sh | ||
DevStack is a set of scripts and utilities to quickly deploy an OpenStack cloud.
Goals
- To quickly build dev OpenStack environments in a clean Ubuntu or Fedora 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
Read more at https://docs.openstack.org/devstack/latest
IMPORTANT: Be sure to carefully read stack.sh 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 stack.sh in a clean and disposable vm when you are first getting started.
Versions
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 Newton OpenStack cloud:
git checkout stable/newton
./stack.shYou 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:
GLANCE_REPO=git://git.openstack.org/openstack/glance.git
GLANCE_BRANCH=milestone-proposedStart 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):
./stack.sh
When the script finishes executing, you should be able to access OpenStack endpoints, like so:
- Horizon: http://myhost/
- Keystone: http://myhost:5000/v2.0/
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 listDevStack 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...
stack.sh 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.
stack.sh specifically does not run if started as root.
DevStack will not automatically create the user, but provides a
helper script in tools/create-stack-user.sh. 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).
Customizing
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.