f125a8b892
This change addresses a long-standing issue in rST documentation imported from XML.
That import process added backslash escapes in front of various characters. The three
most common being '(', ')', and '_'.
These instances are removed.
Signed-off-by: Ron Stone <ronald.stone@windriver.com>
Change-Id: Id43a9337ffcd505ccbdf072d7b29afdb5d2c997e
109 lines
4.1 KiB
ReStructuredText
109 lines
4.1 KiB
ReStructuredText
|
|
.. nex1565202435470
|
|
.. _deployment-config-options-all-in-one-duplex-configuration:
|
|
|
|
=====================================
|
|
All-in-one (AIO) Duplex Configuration
|
|
=====================================
|
|
|
|
|prod| AIO Duplex provides a scaled-down |prod| deployment
|
|
option that combines controller, storage, and worker functionality on a
|
|
redundant pair of hosts.
|
|
|
|
.. contents::
|
|
:local:
|
|
:depth: 1
|
|
|
|
.. image:: /shared/figures/deploy_install_guides/starlingx-deployment-options-duplex.png
|
|
:width: 800
|
|
|
|
See :ref:`Common Components <common-components>` for a description of common
|
|
components of this deployment configuration.
|
|
|
|
This deployment configuration provides a solution for situations in which
|
|
protection against overall server hardware faults and only a small amount of
|
|
cloud processing / storage power is required.
|
|
|
|
HA services run on the controller function across the two physical servers in
|
|
either Active/Active or Active/Standby mode.
|
|
|
|
The optional storage function is provided by a small-scale two node Ceph
|
|
cluster using one or more disks/|OSDs| from each server, and provides the
|
|
backend for Kubernetes' |PVCs|.
|
|
|
|
The typical solution requires two or more disks per server; one for system
|
|
requirements and container ephemeral storage, and one or more for Ceph
|
|
|OSDs|.
|
|
|
|
Optionally, instead of using an internal Ceph cluster across servers, you can
|
|
configure an external Netapp Trident storage backend.
|
|
|
|
Hosted application containers are scheduled on both worker functions.
|
|
|
|
In the event of an overall server hardware fault:
|
|
|
|
.. _deployment-config-options-all-in-one-duplex-configuration-ul-jr3-tcy-q3b:
|
|
|
|
- all controller HA services enter active mode on the remaining healthy
|
|
server, and
|
|
|
|
- all hosted application containers impacted by the failed server are
|
|
recovered on the remaining healthy server.
|
|
|
|
On an All-in-one Duplex system, two modes of connection are supported for the
|
|
management and cluster host network.
|
|
|
|
**Direct**
|
|
This mode uses direct peer-to-peer connections between the two nodes for
|
|
the management and an internal cluster host network connection,
|
|
eliminating the need for a |ToR| switch port for these
|
|
networks.
|
|
|
|
|org| recommends a 10GE shared management and cluster host network with
|
|
|LAG| for direct connections. If the management
|
|
network must be 1GE (to support PXE booting), then a separate 10GE
|
|
cluster host network with |LAG| is also
|
|
recommended. The use of |LAG| addresses failover
|
|
considerations unique to peer-to-peer connections.
|
|
|
|
**Switch-based**
|
|
This mode uses a |ToR| switch to complete the
|
|
management and cluster host network connections.
|
|
|
|
.. _deployment-config-options-all-in-one-duplex-configuration-section-N10099-N1001C-N10001:
|
|
|
|
----------------------
|
|
Intel Xeon D Processor
|
|
----------------------
|
|
|
|
In addition to regular all-in-one deployments, |prod| Simplex and Duplex
|
|
provide support for small scale deployments on the Intel Xeon D family of
|
|
processors using a smaller memory and CPU footprint than the standard Simplex
|
|
configuration.
|
|
|
|
For low-cost or low-power applications with minimal performance demands (40
|
|
containers or fewer), |prod| Simplex can be deployed on a server with a
|
|
single Intel Xeon D class processor. The platform-reserved memory and the
|
|
maximum number of worker threads are reduced by default, but can be
|
|
reconfigured if required.
|
|
|
|
.. _deployment-config-options-all-in-one-duplex-configuration-section-N100AA-N1001C-N10001:
|
|
|
|
---------------------------------------------------
|
|
Extending the capacity of the AIO-Duplex Deployment
|
|
---------------------------------------------------
|
|
|
|
Up to fifty worker/compute nodes can be added to the All-in-one Duplex
|
|
deployment, allowing a capacity growth path if starting with an AIO-Duplex
|
|
deployment.
|
|
|
|
.. image:: /deploy_install_guides/release/figures/starlingx-deployment-options-duplex-extended.png
|
|
:width: 800
|
|
|
|
The extended capacity is limited up to fifty worker/compute nodes as the
|
|
controller/worker function on the AIO controllers has only a portion of the
|
|
processing power of the overall server.
|
|
|
|
Hosted application containers can be scheduled on either of the AIO controller
|
|
nodes and/or the worker nodes.
|