============= Configuration ============= .. contents:: :local: :depth: 1 local.conf ========== DevStack configuration is modified via the file ``local.conf``. It is a modified INI format file that introduces a meta-section header to carry additional information regarding the configuration files to be changed. A sample is provided in ``devstack/samples`` The new header is similar to a normal INI section header but with double brackets (``[[ ... ]]``) and two internal fields separated by a pipe (``|``). Note that there are no spaces between the double brackets and the internal fields. Likewise, there are no spaces between the pipe and the internal fields: :: '[[' '|' ']]' where ```` is one of a set of phase names defined by ``stack.sh`` and ```` is the configuration filename. The filename is eval'ed in the ``stack.sh`` context so all environment variables are available and may be used. Using the project config file variables in the header is strongly suggested (see the ``NOVA_CONF`` example below). If the path of the config file does not exist it is skipped. The defined phases are: - **local** - extracts ``localrc`` from ``local.conf`` before ``stackrc`` is sourced - **pre-install** - runs after the system packages are installed but before any of the source repositories are installed - **install** - runs immediately after the repo installations are complete - **post-config** - runs after the layer 2 services are configured and before they are started - **extra** - runs after services are started and before any files in ``extra.d`` are executed - **post-extra** - runs after files in ``extra.d`` are executed The file is processed strictly in sequence; meta-sections may be specified more than once but if any settings are duplicated the last to appear in the file will be used. :: [[post-config|$NOVA_CONF]] [DEFAULT] use_syslog = True [osapi_v3] enabled = False A specific meta-section ``local|localrc`` is used to provide a default ``localrc`` file (actually ``.localrc.auto``). This allows all custom settings for DevStack to be contained in a single file. If ``localrc`` exists it will be used instead to preserve backward-compatibility. More details on the :doc:`contents of local.conf ` are available. :: [[local|localrc]] FIXED_RANGE=10.254.1.0/24 ADMIN_PASSWORD=speciale LOGFILE=$DEST/logs/stack.sh.log Note that ``Q_PLUGIN_CONF_FILE`` is unique in that it is assumed to *NOT* start with a ``/`` (slash) character. A slash will need to be added: :: [[post-config|/$Q_PLUGIN_CONF_FILE]] Also note that the ``localrc`` section is sourced as a shell script fragment and MUST conform to the shell requirements, specifically no whitespace around ``=`` (equals). .. _minimal-configuration: Minimal Configuration ===================== While ``stack.sh`` is happy to run without a ``localrc`` section in ``local.conf``, devlife is better when there are a few minimal variables set. This is an example of a minimal configuration that touches the values that most often need to be set. - no logging - pre-set the passwords to prevent interactive prompts - move network ranges away from the local network (``FIXED_RANGE`` and ``FLOATING_RANGE``, commented out below) - set the host IP if detection is unreliable (``HOST_IP``, commented out below) :: [[local|localrc]] ADMIN_PASSWORD=secrete DATABASE_PASSWORD=$ADMIN_PASSWORD RABBIT_PASSWORD=$ADMIN_PASSWORD SERVICE_PASSWORD=$ADMIN_PASSWORD SERVICE_TOKEN=a682f596-76f3-11e3-b3b2-e716f9080d50 #FIXED_RANGE=172.31.1.0/24 #FLOATING_RANGE=192.168.20.0/25 #HOST_IP=10.3.4.5 If the ``*_PASSWORD`` variables are not set here you will be prompted to enter values for them by ``stack.sh``. The network ranges must not overlap with any networks in use on the host. Overlap is not uncommon as RFC-1918 'private' ranges are commonly used for both the local networking and Nova's fixed and floating ranges. ``HOST_IP`` is normally detected on the first run of ``stack.sh`` but often is indeterminate on later runs due to the IP being moved from an Ethernet interface to a bridge on the host. Setting it here also makes it available for ``openrc`` to set ``OS_AUTH_URL``. ``HOST_IP`` is not set by default. ``HOST_IPV6`` is normally detected on the first run of ``stack.sh`` but will not be set if there is no IPv6 address on the default Ethernet interface. Setting it here also makes it available for ``openrc`` to set ``OS_AUTH_URL``. ``HOST_IPV6`` is not set by default. Historical Notes ================ Historically DevStack obtained all local configuration and customizations from a ``localrc`` file. In Oct 2013 the ``local.conf`` configuration method was introduced (in `review 46768 `__) to simplify this process. Configuration Notes =================== .. contents:: :local: Installation Directory ---------------------- The DevStack install directory is set by the ``DEST`` variable. By default it is ``/opt/stack``. By setting it early in the ``localrc`` section you can reference it in later variables. It can be useful to set it even though it is not changed from the default value. :: DEST=/opt/stack Logging ------- Enable Logging ~~~~~~~~~~~~~~ By default ``stack.sh`` output is only written to the console where it runs. It can be sent to a file in addition to the console by setting ``LOGFILE`` to the fully-qualified name of the destination log file. A timestamp will be appended to the given filename for each run of ``stack.sh``. :: LOGFILE=$DEST/logs/stack.sh.log Old log files are cleaned automatically if ``LOGDAYS`` is set to the number of days of old log files to keep. :: LOGDAYS=1 The some of the project logs (Nova, Cinder, etc) will be colorized by default (if ``SYSLOG`` is not set below); this can be turned off by setting ``LOG_COLOR`` to ``False``. :: LOG_COLOR=False Logging the Service Output ~~~~~~~~~~~~~~~~~~~~~~~~~~ DevStack will log the ``stdout`` output of the services it starts. When using ``screen`` this logs the output in the screen windows to a file. Without ``screen`` this simply redirects stdout of the service process to a file in ``LOGDIR``. :: LOGDIR=$DEST/logs Note the use of ``DEST`` to locate the main install directory; this is why we suggest setting it in ``local.conf``. Enabling Syslog ~~~~~~~~~~~~~~~ Logging all services to a single syslog can be convenient. Enable syslogging by setting ``SYSLOG`` to ``True``. If the destination log host is not localhost ``SYSLOG_HOST`` and ``SYSLOG_PORT`` can be used to direct the message stream to the log host. :: SYSLOG=True SYSLOG_HOST=$HOST_IP SYSLOG_PORT=516 Example Logging Configuration ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ For example, non-interactive installs probably wish to save output to a file, keep service logs and disable color in the stored files. :: [[local|localrc]] DEST=/opt/stack/ LOGDIR=$DEST/logs LOGFILE=$LOGDIR/stack.sh.log LOG_COLOR=False Database Backend ---------------- Multiple database backends are available. The available databases are defined in the lib/databases directory. ``mysql`` is the default database, choose a different one by putting the following in the ``localrc`` section: :: disable_service mysql enable_service postgresql ``mysql`` is the default database. RPC Backend ----------- Support for a RabbitMQ RPC backend is included. Additional RPC backends may be available via external plugins. Enabling or disabling RabbitMQ is handled via the usual service functions and ``ENABLED_SERVICES``. Example disabling RabbitMQ in ``local.conf``: :: disable_service rabbit Apache Frontend --------------- The Apache web server can be enabled for wsgi services that support being deployed under HTTPD + mod_wsgi. By default, services that recommend running under HTTPD + mod_wsgi are deployed under Apache. To use an alternative deployment strategy (e.g. eventlet) for services that support an alternative to HTTPD + mod_wsgi set ``ENABLE_HTTPD_MOD_WSGI_SERVICES`` to ``False`` in your ``local.conf``. Each service that can be run under HTTPD + mod_wsgi also has an override toggle available that can be set in your ``local.conf``. Keystone is run under Apache with ``mod_wsgi`` by default. Example (Keystone) :: KEYSTONE_USE_MOD_WSGI="True" Example (Nova): :: NOVA_USE_MOD_WSGI="True" Example (Swift): :: SWIFT_USE_MOD_WSGI="True" Example (Heat): :: HEAT_USE_MOD_WSGI="True" Example (Cinder): :: CINDER_USE_MOD_WSGI="True" Libraries from Git ------------------ By default devstack installs OpenStack server components from git, however it installs client libraries from released versions on pypi. This is appropriate if you are working on server development, but if you want to see how an unreleased version of the client affects the system you can have devstack install it from upstream, or from local git trees by specifying it in ``LIBS_FROM_GIT``. Multiple libraries can be specified as a comma separated list. :: LIBS_FROM_GIT=python-keystoneclient,oslo.config Virtual Environments -------------------- Enable the use of Python virtual environments by setting ``USE_VENV`` to ``True``. This will enable the creation of venvs for each project that is defined in the ``PROJECT_VENV`` array. Each entry in the ``PROJECT_VENV`` array contains the directory name of a venv to be used for the project. The array index is the project name. Multiple projects can use the same venv if desired. :: PROJECT_VENV["glance"]=${GLANCE_DIR}.venv ``ADDITIONAL_VENV_PACKAGES`` is a comma-separated list of additional packages to be installed into each venv. Often projects will not have certain packages listed in its ``requirements.txt`` file because they are 'optional' requirements, i.e. only needed for certain configurations. By default, the enabled databases will have their Python bindings added when they are enabled. :: ADDITIONAL_VENV_PACKAGES="python-foo, python-bar" A clean install every time -------------------------- By default ``stack.sh`` only clones the project repos if they do not exist in ``$DEST``. ``stack.sh`` will freshen each repo on each run if ``RECLONE`` is set to ``yes``. This avoids having to manually remove repos in order to get the current branch from ``$GIT_BASE``. :: RECLONE=yes Upgrade packages installed by pip --------------------------------- By default ``stack.sh`` only installs Python packages if no version is currently installed or the current version does not match a specified requirement. If ``PIP_UPGRADE`` is set to ``True`` then existing required Python packages will be upgraded to the most recent version that matches requirements. :: PIP_UPGRADE=True Service Catalog Backend ----------------------- By default DevStack uses Keystone's ``sql`` service catalog backend. An alternate ``template`` backend is also available, however, it does not support the ``service-*`` and ``endpoint-*`` commands of the ``keystone`` CLI. To do so requires the ``sql`` backend be enabled with ``KEYSTONE_CATALOG_BACKEND``: :: KEYSTONE_CATALOG_BACKEND=template DevStack's default configuration in ``sql`` mode is set in ``lib/keystone`` Guest Images ------------ Images provided in URLS via the comma-separated ``IMAGE_URLS`` variable will be downloaded and uploaded to glance by DevStack. Default guest-images are predefined for each type of hypervisor and their testing-requirements in ``stack.sh``. Setting ``DOWNLOAD_DEFAULT_IMAGES=False`` will prevent DevStack downloading these default images; in that case, you will want to populate ``IMAGE_URLS`` with sufficient images to satisfy testing-requirements. :: DOWNLOAD_DEFAULT_IMAGES=False IMAGE_URLS="http://foo.bar.com/image.qcow," IMAGE_URLS+="http://foo.bar.com/image2.qcow" Instance Type ------------- ``DEFAULT_INSTANCE_TYPE`` can be used to configure the default instance type. When this parameter is not specified, Devstack creates additional micro & nano flavors for really small instances to run Tempest tests. For guests with larger memory requirements, ``DEFAULT_INSTANCE_TYPE`` should be specified in the configuration file so Tempest selects the default flavors instead. KVM on Power with QEMU 2.4 requires 512 MB to load the firmware - `QEMU 2.4 - PowerPC `__ so users running instances on ppc64/ppc64le can choose one of the default created flavors as follows: :: DEFAULT_INSTANCE_TYPE=m1.tiny IP Version ---------- ``IP_VERSION`` can be used to configure DevStack to create either an IPv4, IPv6, or dual-stack tenant data-network by with either ``IP_VERSION=4``, ``IP_VERSION=6``, or ``IP_VERSION=4+6`` respectively. This functionality requires that the Neutron networking service is enabled by setting the following options: :: disable_service n-net enable_service q-svc q-agt q-dhcp q-l3 The following optional variables can be used to alter the default IPv6 behavior: :: IPV6_RA_MODE=slaac IPV6_ADDRESS_MODE=slaac FIXED_RANGE_V6=fd$IPV6_GLOBAL_ID::/64 IPV6_PRIVATE_NETWORK_GATEWAY=fd$IPV6_GLOBAL_ID::1 *Note*: ``FIXED_RANGE_V6`` and ``IPV6_PRIVATE_NETWORK_GATEWAY`` can be configured with any valid IPv6 prefix. The default values make use of an auto-generated ``IPV6_GLOBAL_ID`` to comply with RFC4193. Service Version ~~~~~~~~~~~~~~~ DevStack can enable service operation over either IPv4 or IPv6 by setting ``SERVICE_IP_VERSION`` to either ``SERVICE_IP_VERSION=4`` or ``SERVICE_IP_VERSION=6`` respectively. When set to ``4`` devstack services will open listen sockets on ``0.0.0.0`` and service endpoints will be registered using ``HOST_IP`` as the address. When set to ``6`` devstack services will open listen sockets on ``::`` and service endpoints will be registered using ``HOST_IPV6`` as the address. The default value for this setting is ``4``. Dual-mode support, for example ``4+6`` is not currently supported. ``HOST_IPV6`` can optionally be used to alter the default IPv6 address :: HOST_IPV6=${some_local_ipv6_address} Multi-node setup ~~~~~~~~~~~~~~~~ See the :doc:`multi-node lab guide` Projects -------- Neutron ~~~~~~~ See the :doc:`neutron configuration guide` for details on configuration of Neutron Swift ~~~~~ Swift is disabled by default. When enabled, it is configured with only one replica to avoid being IO/memory intensive on a small VM. When running with only one replica the account, container and object services will run directly in screen. The others services like replicator, updaters or auditor runs in background. If you would like to enable Swift you can add this to your ``localrc`` section: :: enable_service s-proxy s-object s-container s-account If you want a minimal Swift install with only Swift and Keystone you can have this instead in your ``localrc`` section: :: disable_all_services enable_service key mysql s-proxy s-object s-container s-account If you only want to do some testing of a real normal swift cluster with multiple replicas you can do so by customizing the variable ``SWIFT_REPLICAS`` in your ``localrc`` section (usually to 3). Swift S3 ++++++++ If you are enabling ``swift3`` in ``ENABLED_SERVICES`` DevStack will install the swift3 middleware emulation. Swift will be configured to act as a S3 endpoint for Keystone so effectively replacing the ``nova-objectstore``. Only Swift proxy server is launched in the screen session all other services are started in background and managed by ``swift-init`` tool. Heat ~~~~ Heat is disabled by default (see ``stackrc`` file). To enable it explicitly you'll need the following settings in your ``localrc`` section :: enable_service heat h-api h-api-cfn h-api-cw h-eng Heat can also run in standalone mode, and be configured to orchestrate on an external OpenStack cloud. To launch only Heat in standalone mode you'll need the following settings in your ``localrc`` section :: disable_all_services enable_service rabbit mysql heat h-api h-api-cfn h-api-cw h-eng HEAT_STANDALONE=True KEYSTONE_SERVICE_HOST=... KEYSTONE_AUTH_HOST=... Tempest ~~~~~~~ If tempest has been successfully configured, a basic set of smoke tests can be run as follows: :: $ cd /opt/stack/tempest $ tox -efull tempest.scenario.test_network_basic_ops By default tempest is downloaded and the config file is generated, but the tempest package is not installed in the system's global site-packages (the package install includes installing dependences). So tempest won't run outside of tox. If you would like to install it add the following to your ``localrc`` section: :: INSTALL_TEMPEST=True Xenserver ~~~~~~~~~ If you would like to use Xenserver as the hypervisor, please refer to the instructions in ``./tools/xen/README.md``. Cells ~~~~~ `Cells `__ is an alternative scaling option. To setup a cells environment add the following to your ``localrc`` section: :: enable_service n-cell Be aware that there are some features currently missing in cells, one notable one being security groups. The exercises have been patched to disable functionality not supported by cells. Cinder ~~~~~~ The logical volume group used to hold the Cinder-managed volumes is set by ``VOLUME_GROUP``, the logical volume name prefix is set with ``VOLUME_NAME_PREFIX`` and the size of the volume backing file is set with ``VOLUME_BACKING_FILE_SIZE``. :: VOLUME_GROUP="stack-volumes" VOLUME_NAME_PREFIX="volume-" VOLUME_BACKING_FILE_SIZE=10250M Keystone ~~~~~~~~ Multi-Region Setup ++++++++++++++++++ We want to setup two devstack (RegionOne and RegionTwo) with shared keystone (same users and services) and horizon. Keystone and Horizon will be located in RegionOne. Full spec is available at: ``__. In RegionOne: :: REGION_NAME=RegionOne In RegionTwo: :: disable_service horizon KEYSTONE_SERVICE_HOST= KEYSTONE_AUTH_HOST= REGION_NAME=RegionTwo