0352f584ab
Change 11277b1f3c disabled swift due to
port conflicts but the documentation still states that it is enabled
by default, which can be quite confusing.
While we're there, wrap affected lines to 80 chars.
Change-Id: I9d543f3368bdadadae482c163d814065009ab395
203 lines
7.6 KiB
Markdown
203 lines
7.6 KiB
Markdown
DevStack is a set of scripts and utilities to quickly deploy an OpenStack cloud.
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# Goals
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* To quickly build dev OpenStack environments in a clean Ubuntu or Fedora environment
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* To describe working configurations of OpenStack (which code branches work together? what do config files look like for those branches?)
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* 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
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* To make it easy to prototype cross-project features
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* To sanity-check OpenStack builds (used in gating commits to the primary repos)
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Read more at http://devstack.org (built from the gh-pages branch)
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IMPORTANT: Be sure to carefully read `stack.sh` and any other scripts you execute before you run them, as they install software and may alter your networking configuration. We strongly recommend that you run `stack.sh` in a clean and disposable vm when you are first getting started.
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# Devstack on Xenserver
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If you would like to use Xenserver as the hypervisor, please refer to the instructions in `./tools/xen/README.md`.
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# Versions
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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 diablo OpenStack cloud:
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git checkout stable/diablo
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./stack.sh
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You can also pick specific OpenStack project releases by setting the appropriate `*_BRANCH` variables in `localrc` (look in `stackrc` for the default set). Usually just before a release there will be milestone-proposed branches that need to be tested::
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GLANCE_REPO=https://github.com/openstack/glance.git
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GLANCE_BRANCH=milestone-proposed
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# Start A Dev Cloud
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Installing in a dedicated disposable vm is safer than installing on your dev machine! To start a dev cloud:
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./stack.sh
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When the script finishes executing, you should be able to access OpenStack endpoints, like so:
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* Horizon: http://myhost/
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* Keystone: http://myhost:5000/v2.0/
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We also provide an environment file that you can use to interact with your cloud via CLI:
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# source openrc file to load your environment with osapi and ec2 creds
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. openrc
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# list instances
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nova list
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If the EC2 API is your cup-o-tea, you can create credentials and use euca2ools:
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# source eucarc to generate EC2 credentials and set up the environment
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. eucarc
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# list instances using ec2 api
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euca-describe-instances
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# Customizing
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You can override environment variables used in `stack.sh` by creating file name `localrc`. It is likely that you will need to do this to tweak your networking configuration should you need to access your cloud from a different host.
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# Database Backend
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Multiple database backends are available. The available databases are defined in the lib/databases directory.
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`mysql` is the default database, choose a different one by putting the following in `localrc`:
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disable_service mysql
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enable_service postgresql
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`mysql` is the default database.
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# RPC Backend
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Multiple RPC backends are available. Currently, this
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includes RabbitMQ (default), Qpid, and ZeroMQ. Your backend of
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choice may be selected via the `localrc`.
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Note that selecting more than one RPC backend will result in a failure.
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Example (ZeroMQ):
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ENABLED_SERVICES="$ENABLED_SERVICES,-rabbit,-qpid,zeromq"
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Example (Qpid):
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ENABLED_SERVICES="$ENABLED_SERVICES,-rabbit,-zeromq,qpid"
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# Swift
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Swift is disabled by default. When enabled, it is configured with
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only one replica to avoid being IO/memory intensive on a small
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vm. When running with only one replica the account, container and
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object services will run directly in screen. The others services like
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replicator, updaters or auditor runs in background.
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If you would like to enable Swift you can add this to your `localrc` :
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enable_service s-proxy s-object s-container s-account
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If you want a minimal Swift install with only Swift and Keystone you
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can have this instead in your `localrc`:
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disable_all_services
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enable_service key mysql s-proxy s-object s-container s-account
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If you only want to do some testing of a real normal swift cluster
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with multiple replicas you can do so by customizing the variable
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`SWIFT_REPLICAS` in your `localrc` (usually to 3).
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# Swift S3
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If you are enabling `swift3` in `ENABLED_SERVICES` devstack will
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install the swift3 middleware emulation. Swift will be configured to
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act as a S3 endpoint for Keystone so effectively replacing the
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`nova-objectstore`.
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Only Swift proxy server is launched in the screen session all other
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services are started in background and managed by `swift-init` tool.
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# Neutron
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Basic Setup
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In order to enable Neutron a single node setup, you'll need the
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following settings in your `localrc` :
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disable_service n-net
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enable_service q-svc
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enable_service q-agt
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enable_service q-dhcp
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enable_service q-l3
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enable_service q-meta
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enable_service neutron
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# Optional, to enable tempest configuration as part of devstack
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enable_service tempest
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Then run `stack.sh` as normal.
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devstack supports adding specific Neutron configuration flags to the service, Open vSwitch plugin and LinuxBridge plugin configuration files. To make use of this feature, the following variables are defined and can be configured in your `localrc` file:
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Variable Name Config File Section Modified
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-------------------------------------------------------------------------------------
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Q_SRV_EXTRA_OPTS Plugin `OVS` (for Open Vswitch) or `LINUX_BRIDGE` (for LinuxBridge)
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Q_AGENT_EXTRA_AGENT_OPTS Plugin AGENT
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Q_AGENT_EXTRA_SRV_OPTS Plugin `OVS` (for Open Vswitch) or `LINUX_BRIDGE` (for LinuxBridge)
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Q_SRV_EXTRA_DEFAULT_OPTS Service DEFAULT
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An example of using the variables in your `localrc` is below:
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Q_AGENT_EXTRA_AGENT_OPTS=(tunnel_type=vxlan vxlan_udp_port=8472)
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Q_SRV_EXTRA_OPTS=(tenant_network_type=vxlan)
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# Tempest
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If tempest has been successfully configured, a basic set of smoke tests can be run as follows:
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$ cd /opt/stack/tempest
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$ nosetests tempest/tests/network/test_network_basic_ops.py
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# Multi-Node Setup
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A more interesting setup involves running multiple compute nodes, with Neutron networks connecting VMs on different compute nodes.
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You should run at least one "controller node", which should have a `stackrc` that includes at least:
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disable_service n-net
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enable_service q-svc
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enable_service q-agt
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enable_service q-dhcp
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enable_service q-l3
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enable_service q-meta
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enable_service neutron
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You likely want to change your `localrc` to run a scheduler that will balance VMs across hosts:
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SCHEDULER=nova.scheduler.simple.SimpleScheduler
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You can then run many compute nodes, each of which should have a `stackrc` which includes the following, with the IP address of the above controller node:
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ENABLED_SERVICES=n-cpu,rabbit,g-api,neutron,q-agt
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SERVICE_HOST=[IP of controller node]
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MYSQL_HOST=$SERVICE_HOST
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RABBIT_HOST=$SERVICE_HOST
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Q_HOST=$SERVICE_HOST
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MATCHMAKER_REDIS_HOST=$SERVICE_HOST
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# Cells
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Cells is a new scaling option with a full spec at http://wiki.openstack.org/blueprint-nova-compute-cells.
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To setup a cells environment add the following to your `localrc`:
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enable_service n-cell
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enable_service n-api-meta
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MULTI_HOST=True
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# The following have not been tested with cells, they may or may not work.
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disable_service n-obj
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disable_service cinder
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disable_service c-sch
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disable_service c-api
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disable_service c-vol
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disable_service n-xvnc
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Be aware that there are some features currently missing in cells, one notable one being security groups.
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