openstack/nova
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Docs: Add Placement to Nova system architecture

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Changes in svg:
- schema with nova-network is removed and one with Neutron is made as default
- Placement service is added to a party
- titles and arrows are aligned

Change-Id: If7e4a0b92c8713dabcb16a5e7820fbf479d82917
This commit is contained in:
Andrey Volkov 2018-07-19 18:10:25 +03:00
parent 50f40854b0
commit 3a26ad77e8
2 changed files with 1158 additions and 410 deletions
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doc/source/_static/images/architecture.svg
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doc/source/user/architecture.rst
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@ -48,7 +48,7 @@ Components
---------- ----------
Below you will find a helpful explanation of the key components Below you will find a helpful explanation of the key components
of a typical (non-cells v1) Nova deployment. of a typical Nova deployment.
.. image:: /_static/images/architecture.svg .. image:: /_static/images/architecture.svg
:width: 100% :width: 100%
@ -56,9 +56,9 @@ of a typical (non-cells v1) Nova deployment.
* DB: sql database for data storage. * DB: sql database for data storage.
* API: component that receives HTTP requests, converts commands and communicates with other components via the **oslo.messaging** queue or HTTP. * API: component that receives HTTP requests, converts commands and communicates with other components via the **oslo.messaging** queue or HTTP.
* Scheduler: decides which host gets each instance. * Scheduler: decides which host gets each instance.
* Network: manages ip forwarding, bridges, and vlans.
* Compute: manages communication with hypervisor and virtual machines. * Compute: manages communication with hypervisor and virtual machines.
* Conductor: handles requests that need coordination (build/resize), acts as a * Conductor: handles requests that need coordination (build/resize), acts as a
database proxy, or handles object conversions. database proxy, or handles object conversions.
* `Placement <https://docs.openstack.org/nova/latest/user/placement.html>`__: tracks resource provider inventories and usages.
While all services are designed to be horizontally scalable, you should have significantly more computes than anything else. While all services are designed to be horizontally scalable, you should have significantly more computes than anything else.