[AMQP 1.0] AMQP 1.0 Driver User Guide Document update
This patch includes updates to the user guide document for the amqp-dispatch-router feature branch. Includes information for deploying driver to operate with router or broker intermediaries. Change-Id: Icb32743a82bf0f1e5969a215d880dc736a22f408 Closes-Bug: #1596649
This commit is contained in:
Andrew Smith
parent
ded89418a2
commit
827a5176d9
@ -1,6 +1,6 @@
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-------------------------
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AMQP 1.0 Protocol Support
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-------------------------
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-----------------------------------------
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AMQP 1.0 Protocol Driver Deployment Guide
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-----------------------------------------
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.. currentmodule:: oslo_messaging
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@ -8,24 +8,98 @@ AMQP 1.0 Protocol Support
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Introduction
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============
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This release of oslo.messaging includes an experimental driver that
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provides support for version 1.0 of the Advanced Message Queuing
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Protocol (AMQP 1.0, ISO/IEC 19464).
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The AMQP 1.0 Protocol Driver is a messaging transport backend
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supported in oslo.messaging. The driver maps the base oslo.messaging
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capabilities for RPC and Notification message exchange onto version
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1.0 of the Advanced Message Queuing Protocol (AMQP 1.0, ISO/IEC
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19464). The driver is intended to support any messaging intermediary
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(e.g. broker or router) that implements version 1.0 of the AMQP
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protocol.
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The current implementation of this driver is considered
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*experimental*. It is not recommended that this driver be used in
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production systems. Rather, this driver is being provided as a
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*technical preview*, in hopes that it will encourage further testing
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by the AMQP 1.0 community.
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More detail regarding the AMQP 1.0 Protocol is available from the
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`AMQP specification`_.
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More detail regarding the driver's implementation is available from the `specification`_.
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.. _AMQP specification: http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-overview-v1.0-os.html
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.. _specification: https://git.openstack.org/cgit/openstack/oslo-specs/tree/specs/juno/amqp10-driver-implementation.rst
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More detail regarding the driver's implementation is available from
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the `oslo specification`_.
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.. _oslo specification: https://git.openstack.org/cgit/openstack/oslo-specs/tree/specs/juno/amqp10-driver-implementation.rst
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========
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Abstract
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========
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The AMQP 1.0 driver is one of a family of oslo.messaging backend
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drivers. It currently supports two types of message intermediaries.
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The first type is an AMQP 1.0 messaging broker and the second type is
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an AMQP 1.0 message router. The driver should support additional
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intermediary types in the future but may require additions to driver
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configuration parameters in order to do so.
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+--------------+-----------+------------+------------+-----------+
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| Intermediary | RPC | Notify | Message | Topology |
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| Type | Pattern | Pattern | Treatment | |
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+--------------+-----------+------------+------------+-----------+
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| Message | Yes | `Limited`_ | Direct | Single or |
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| Router | | | Messaging | Mesh |
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+--------------+-----------+------------+------------+-----------+
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| Message | Yes | Yes | Store and | Single or |
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| Broker | | | Forward | Cluster |
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+--------------+-----------+------------+------------+-----------+
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Direct Messaging
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----------------
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The direct messaging capabilities provided by the message router
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intermediary type are recommended for the oslo.messaging RPC
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messaging pattern.
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.. _Limited:
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Additionally, the message router intermediary may be used for the
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Notification messaging pattern with the consideration that
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notification messages will be dropped when there is no active
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consumer. The message router does not provide durability or
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store-and-forward capabilities for notification messages.
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The driver can readily scale operation from working with a single
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instances of a message router to working with a large scale routed
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mesh interconnect topology.
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Store and Forward
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-----------------
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The store and forward capabilities provide by the message broker
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intermediary type are recommended for the oslo.message Notification
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messaging pattern. This driver is able to work with a single instance
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of a message broker or a clustered broker deployment.
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Oslo.messaging provides a mechanism to configure separate backends for
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RPC and Notification communications. This document provides deployment and
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configuration information for use of this driver in oslo.messaging.
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Addressing
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----------
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A new address syntax was added to the driver to support efficient
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direct message routing. This new syntax will also work with a broker
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intermediary backend but is not compatible with the address syntax
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previously used by the driver. In order to allow backward compatibility,
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the driver will attempt to identify the intermediary type for the
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backend in use and will automatically select the 'legacy' syntax for
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broker-based backends or the new 'routable' syntax for router-based
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backends. An `address mode`_ configuration option is provided to
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override this dynamic behavior and force the use of either the legacy
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or routable address syntax.
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=============
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Prerequisites
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=============
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Protocol Engine
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---------------
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This driver uses the Apache QPID `Proton`_ AMQP 1.0 protocol engine.
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This engine consists of a platform specific library and a python
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binding. The driver does not directly interface with the engine API,
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@ -37,100 +111,372 @@ is layered on top of the protocol engine.
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.. _Pyngus: https://github.com/kgiusti/pyngus
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In order to run the driver the Proton Python bindings, Proton
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library, Proton header files, and Pyngus must be installed.
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library, Proton header files, and Pyngus must be installed. Pre-built
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packages for both Pyngus and the Proton protocol engine are available
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for various Linux distributions (see `packages`_ below). It is
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recommended to use the pre-built packages if they are available for
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your platform.
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Pyngus is available via `Pypi`__.
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The Proton package includes a C extension that links to the Proton
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library. If this library is not installed, then the Proton install
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script will attempt to download the necessary Proton C source files from
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the Apache repository and build the library locally.
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.. __: https://pypi.python.org/pypi/pyngus
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In order to build the Proton C source locally, there are a number of
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tools and libraries that need to be present:
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While the Proton Python bindings are available via `Pypi`__, it
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includes a C extension that requires the Proton library and header
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files be pre-installed in order for the binding to install properly.
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If the target platform's distribution provides a pre-packaged version
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of the Proton Python binding (see packages_ below), it is recommended
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to use these pre-built packages instead of pulling them from Pypi.
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* The tools and library necessary for Python development
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* The `SWIG`_ wrapper generator
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* The `OpenSSL`_ development libraries and headers
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* The `Cyrus SASL`_ development libraries and headers
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.. __: https://pypi.python.org/pypi/python-qpid-proton
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.. _SWIG: http://www.swig.org/index.php
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.. _OpenSSL: https://www.openssl.org
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.. _Cyrus SASL: https://cyrusimap.org
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The driver also requires a *broker* that supports version 1.0 of the
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AMQP protocol.
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**Note well**: Currently the Proton Pypi package only supports building
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the C extension on Linux systems.
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The driver has only been tested using `qpidd`_ in a `patched
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devstack`_ environment. The version of qpidd **must** be at least
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0.26. qpidd also uses the Proton engine for its AMQP 1.0 support, so
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Router Intermediary
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-------------------
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This driver supports a *router* intermediary that supports version 1.0
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of the AMQP protocol. The direct messaging capabilities provided by
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this intermediary type are recommended for oslo.messaging RPC.
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The driver has been tested with `qpid-dispatch-router`_ router in a
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`devstack`_ environment. The version of qpid-dispatch-router
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**must** be at least 0.6.0. The qpid-dispatch-router also uses the
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Proton engine for its AMQP 1.0 support, so the Proton library must be
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installed on the system hosting the qpid-dispatch-router daemon.
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.. _qpid-dispatch-router: http://qpid.apache.org/components/dispatch-router/
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Pre-built packages for the router are available. See `packages`_ below.
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Broker Intermediary
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-------------------
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This driver supports a *broker* intermediary that supports version 1.0
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of the AMQP protocol. The store and forward capabilities provided by
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this intermediary type are recommended for oslo.messaging Notifications.
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The driver has been tested with the `qpidd`_ broker in a `devstack`_
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environment. The version of qpidd **must** be at least
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0.34. qpidd also uses the Proton engine for its AMQP 1.0 support, so
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the Proton library must be installed on the system hosting the qpidd
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daemon.
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.. _qpidd: http://qpid.apache.org/components/cpp-broker/index.html
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.. _patched devstack: https://review.openstack.org/#/c/109118/
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At present, RabbitMQ does not work with this driver. This driver
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makes use of the *dynamic* flag on the link Source to automatically
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provision a node at the peer. RabbitMQ's AMQP 1.0 implementation has
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yet to implement this feature.
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Pre-built packages for the broker are available. See `packages`_ below.
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See the `specification`_ for additional information regarding testing
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See the `oslo specification`_ for additional information regarding testing
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done on the driver.
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=============
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Configuration
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=============
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driver
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------
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Transport URL Enable
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--------------------
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It is recommended to start with the default configuration options
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supported by the driver. The remaining configuration steps described
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below assume that none of the driver's options have been manually
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overridden.
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In oslo.messaging, the transport_url parameters define the OpenStack service
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backends for RPC and Notify. The url is of the form:
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**Note Well:** The driver currently does **not** support the generic
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*amqp* options used by the existing drivers, such as
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*amqp_durable_queues* or *amqp_auto_delete*. Support for these are
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TBD.
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transport://user:pass@host1:port[,hostN:portN]/virtual_host
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Where the transport value specifies the rpc or notification backend as
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one of **amqp**, rabbit, zmq, etc.
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To specify and enable the AMQP 1.0 driver for RPC, in the section
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[DEFAULT] of the service configuration file, specify the
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'transport_url' parameter:
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::
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[DEFAULT]
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transport_url = amqp://username:password@routerhostname:5672
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To specify and enable the AMQP 1.0 driver for Notify, in the section
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[NOTIFICATIONS] of the service configuration file, specify the
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'transport_url' parameter:
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::
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[NOTIFICATIONS]
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transport_url = amqp://username:password@brokerhostname:5672
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Note, that if a 'transport_url' parameter is not specified in the
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[NOTIFICATIONS] section, the [DEFAULT] transport_url will be used
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for both RPC and Notify backends.
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Driver Options
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--------------
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It is recommended that the default configuration options provided by
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the AMQP 1.0 driver be used. The configuration options can be modified
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in the oslo_messaging_amqp section of the service configuration file.
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Connection Options
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^^^^^^^^^^^^^^^^^^
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In section [oslo_messaging_amqp]:
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#. idle_timeout: Timeout in seconds for inactive connections.
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Default is disabled.
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#. connection_retry_interval: Seconds to pause before attempting to
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re-connect.
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#. connection_retry_backoff: Connection retry interval increment after
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unsuccessful failover attempt.
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#. connection_retry_interval_max: The maximum duration for a
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connection retry interval.
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Message Send Options
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^^^^^^^^^^^^^^^^^^^^
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In section [oslo_messaging_amqp]:
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#. link_retry_delay: Time to pause between re-connecting to an AMQP 1.0 link.
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#. default_reply_timeout: The deadline for an rpc reply message delivery.
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#. default_send_timeout: The deadline for an rpc cast or call message delivery.
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#. default_notify_timeout: The deadline for a sent notification
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message delivery.
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.. _address mode:
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Addressing Options
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^^^^^^^^^^^^^^^^^^
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In section [oslo_messaging_amqp]:
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#. addressing_mode: Indicates addressing mode used by the driver.
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#. server_request_prefix: Legacy address prefix used when sending to a
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specific server.
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#. broadcast_prefix: Legacy broadcast prefix used when broadcasting to
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all servers.
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#. group_request_prefix: Legacy address prefix when sending to any
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server in a group.
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#. rpc_address_prefix: Routable address prefix for all generated RPC addresses.
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#. notify_address_prefix: Routable address prefix for all generated
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Notification addresses.
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#. multicast_address: Appended to address prefix when sending a fanout address.
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#. unicast_address: Appended to address prefix when sending to a
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particular RPC/Notification server.
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#. anycast_address: Appended to address prefix when sending to a group
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of consumers.
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#. default_notification_exchange: Exchange name used in notification
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addresses if not supplied by the application.
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#. default_rpc_exchange: Exchange name used in RPC addresses if not
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supplied by the application.
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SSL Options
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^^^^^^^^^^^
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In section [oslo_messaging_amqp]:
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#. ssl_ca_file: A file containing the trusted Certificate Authority's
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digital certificate (in PEM format). This certificate is used to
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authenticate the messaging backend.
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#. ssl_cert_file: A file containing a digital certificate (in PEM
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format) that is used to identify the driver with the messaging bus
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(i.e. client authentication).
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#. ssl_key_file:A file containing the private key used to sign the
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ssl_cert_file certificate (PEM format, optional if private key is
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stored in the certificate itself).
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#. ssl_key_password: The password used to decrypt the private key
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(not required if private key is not encrypted).
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SASL Options
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^^^^^^^^^^^^
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In section [oslo_messaging_amqp]:
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#. sasl_config_dir: Path to the *directory* that contains the SASL
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configuration.
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#. sasl_config_name: The name of SASL configuration file (without
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.conf suffix) in sasl_config_dir
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#. username: SASL user identifier for authentication with the message
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bus. Can be overridden by URL.
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#. password: Password for username
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AMQP Generic Options (**Note Well**)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The AMQP 1.0 driver currently does **not** support the generic *amqp*
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options used by pre-1.0 drivers such as *amqp_durable_queues* or
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*amqp_auto_delete*.
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qpid-dispatch-router
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--------------------
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First, verify that the Proton library has been installed and is
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imported by the qpid-dispatch-router intermediary. This can be checked
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by running:
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::
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$ qdrouterd --help
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and looking for references to qpid-dispatch include and config path
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options in the help text. If no qpid-dispatch information is listed,
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verify that the Proton libraries are installed and that the version of
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the qdrouterd is greater than or equal to 0.6.0.
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Second, configure the address patterns used by the driver. This is
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done by adding the following to /etc/qpid-dispatch/qdrouterd.conf.
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If the legacy syntax for the addressing mode is required, include the
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following:
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::
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address {
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prefix: unicast
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distribution: closest
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}
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address {
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prefix: exclusive
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distribution: closest
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}
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address {
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prefix: broadcast
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distribution: multicast
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}
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For the routable syntax addressing mode, include the following:
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::
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address {
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prefix: openstack.org/om/rpc/multicast
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distribution: multicast
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}
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address {
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prefix: openstack.org/om/rpc/unicast
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distribution: closest
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}
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address {
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prefix: openstack.org/om/rpc/anycast
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distribution: balanced
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}
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address {
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prefix: openstack.org/om/notify/multicast
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distribution: multicast
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}
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address {
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prefix: openstack.org/om/notify/unicast
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distribution: closest
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}
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address {
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prefix: openstack.org/om/notify/anycast
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distribution: balanced
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}
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**Note well**: For any customization of the `address mode`_ and syntax used,
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it is required that the address entity configurations in the
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/etc/qpid-dispatch/qdrouterd.conf be updated.
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qpidd
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-----
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First, verify that the Proton library has been installed and is
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imported by the qpidd broker. This can checked by running::
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imported by the qpidd broker. This can checked by running:
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|
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::
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$ qpidd --help
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and looking for the AMQP 1.0 options in the help text. If no AMQP 1.0
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options are listed, verify that the Proton libraries are installed and
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that the version of qpidd is greater than or equal to 0.26.
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that the version of qpidd is greater than or equal to 0.34.
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Second, configure the address patterns used by the driver. This is
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done by adding the following to /etc/qpid/qpidd.conf::
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Second, configure the default address patterns used by the
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driver for a broker-based backend. This is done by adding the
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following to /etc/qpid/qpidd.conf:
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::
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queue-patterns=exclusive
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queue-patterns=unicast
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topic-patterns=broadcast
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||||
These patterns, *exclusive*, *unicast*, and *broadcast* are the
|
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default values used by the driver. These can be overridden via the
|
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driver configuration options if desired. If manually overridden,
|
||||
legacy addressing values used by the driver. These can be overridden via the
|
||||
driver configuration options if desired (see above). If manually overridden,
|
||||
update the qpidd.conf values to match.
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||||
services
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||||
--------
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||||
.. _devstack:
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||||
|
||||
The new driver is selected by specifying **amqp** as the transport
|
||||
name. For example::
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||||
================
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DevStack Support
|
||||
================
|
||||
|
||||
from oslo import messaging
|
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from oslo.config import cfg
|
||||
The plugin for the AMQP 1.0 olso.messaging driver is supported by
|
||||
DevStack. The plugin supports the use of either the broker or router
|
||||
intermediary.
|
||||
|
||||
amqp_transport = messaging.get_transport(cfg.CONF,
|
||||
"amqp://me:passwd@host:5672")
|
||||
In local.conf [localrc] section, the `devstack-plugin-amqp1`_ plugin
|
||||
repository must be enabled. For example:
|
||||
|
||||
::
|
||||
|
||||
The new driver can be loaded and used by existing applications by
|
||||
specifying *amqp* as the RPC backend in the service's configuration
|
||||
file. For example, in nova.conf::
|
||||
[[local|localrc]]
|
||||
enable_plugin amqp1 https://git.openstack.org/openstack/devstack-plugin-amqp1
|
||||
|
||||
rpc_backend = amqp
|
||||
Set the username and password variables if needed for the
|
||||
configuration:
|
||||
|
||||
::
|
||||
|
||||
AMQP1_USERNAME=queueuser
|
||||
AMQP1_PASSWORD=queuepassword
|
||||
|
||||
To configure DevStack for operation of the router intermediary, set
|
||||
the AMQP1 service variable to "qdr":
|
||||
|
||||
::
|
||||
|
||||
AMQP1_SERVICE=qdr
|
||||
|
||||
Alternatively, to configure DevStack for operation of the broker
|
||||
intermediary, set the AMQP1 service variable to "qpid":
|
||||
|
||||
::
|
||||
|
||||
AMQP1_SERVICE=qpid
|
||||
|
||||
.. _devstack-plugin-amqp1: https://github.com/openstack/devstack-plugin-amqp1.git
|
||||
|
||||
.. _packages:
|
||||
|
||||
@ -138,20 +484,37 @@ file. For example, in nova.conf::
|
||||
Platforms and Packages
|
||||
======================
|
||||
|
||||
Pyngus is available via Pypi.
|
||||
PyPi
|
||||
----
|
||||
|
||||
Packages for `Pyngus pypi`_ and the `Proton pypi`_ engine are available on Pypi.
|
||||
|
||||
.. _Pyngus pypi: https://pypi.python.org/pypi/pyngus
|
||||
.. _Proton pypi: https://pypi.python.org/pypi/python-qpid-proton
|
||||
|
||||
Pre-built packages for the Proton library and qpidd are available for
|
||||
some popular distributions:
|
||||
|
||||
RHEL and Fedora
|
||||
---------------
|
||||
|
||||
Packages exist in EPEL for RHEL/Centos 7, and Fedora 19+.
|
||||
Packages exist in EPEL for RHEL/Centos 7, and Fedora 24+.
|
||||
Unfortunately, RHEL/Centos 6 base packages include a very old version
|
||||
of qpidd that does not support AMQP 1.0. EPEL's policy does not allow
|
||||
a newer version of qpidd for RHEL/Centos 6.
|
||||
|
||||
The following packages must be installed on the system running the
|
||||
intermediary daemon:
|
||||
|
||||
+--------------+--------------------------+
|
||||
| Intermediary | Package |
|
||||
+--------------+--------------------------+
|
||||
| qdrouterd | qpid-dispatch-router |
|
||||
| | python-qpid-proton |
|
||||
+--------------+--------------------------+
|
||||
| qpidd | qpid-cpp-server |
|
||||
| | qpid-proton-c |
|
||||
+--------------+--------------------------+
|
||||
|
||||
|
||||
qpidd daemon:
|
||||
|
||||
- qpid-cpp-server (version 0.26+)
|
||||
@ -173,17 +536,23 @@ yet available in the Ubuntu repository. The version of qpidd on both
|
||||
platforms is too old and does not support AMQP 1.0.
|
||||
|
||||
Until the proper package version arrive the latest packages can be
|
||||
pulled from the `Apache Qpid PPA`_ on Launchpad::
|
||||
pulled from the `Apache Qpid PPA`_ on Launchpad:
|
||||
|
||||
::
|
||||
|
||||
sudo add-apt-repository ppa:qpid/released
|
||||
|
||||
.. _Apache Qpid PPA: https://launchpad.net/~qpid/+archive/ubuntu/released
|
||||
|
||||
The following packages must be installed on the system running the
|
||||
qdrouterd daemon:
|
||||
|
||||
- qdrouterd (version 0.6.0+)
|
||||
|
||||
The following packages must be installed on the system running the
|
||||
qpidd daemon:
|
||||
|
||||
- qpidd (version 0.26+)
|
||||
- libqpid-proton2
|
||||
- qpidd (version 0.34+)
|
||||
|
||||
The following packages must be installed on the systems running the
|
||||
services that use the new driver:
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user