ed7de99b58
Refactoor linking for DS use. Change-Id: I6de5813fb7df5741e13d34163545d2402a4fd6c5 Signed-off-by: Ron Stone <ronald.stone@windriver.com>
67 lines
2.7 KiB
ReStructuredText
67 lines
2.7 KiB
ReStructuredText
.. include:: /_stx-related-links/configuration-and-management-storage-on-controller-hosts.rln
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.. RL strings
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.. include:: /_vendor/rl-strings.txt
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.. mkh1590590274215
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.. _configuration-and-management-storage-on-controller-hosts:
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===========================
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Storage on Controller Hosts
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===========================
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The controllers provide storage for the OpenStack Controller Services through a
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combination of local container ephemeral disk, Persistent Volume Claims backed
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by Ceph and a containerized HA mariadb deployment.
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On systems configured for controller storage with a small Ceph cluster on the
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master/controller nodes, they also provide persistent block storage for
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persistent |VM| volumes (Cinder), storage for |VM| images (Glance), and
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storage for |VM| remote ephemeral volumes (Nova). On All-in-One Simplex or
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Duplex systems, the controllers also provide nova- local storage for ephemeral
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|VM| volumes.
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On systems configured for controller storage, the master/controller's root disk
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is reserved for system use, and additional disks are required to support the
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small Ceph cluster. On a All-in-One Simplex or Duplex system, you have the
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option to partition the root disk for the nova-local storage (to realize a
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two-disk controller) or use a third disk for nova-local storage.
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.. _configuration-and-management-storage-on-controller-hosts-section-rvx-vwc-vlb:
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--------------------------------------
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Underlying Platform Filesystem Storage
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--------------------------------------
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See the |overview-of-starlingx-planning| documentation for details.
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To pass the disk-space checks, any replacement disks must be installed before
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the allotments are changed.
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.. _configuration-and-management-storage-on-controller-hosts-section-wgm-gxc-vlb:
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---------------------------------------
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Glance, Cinder, and Remote Nova storage
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---------------------------------------
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On systems configured for controller storage with a small Ceph cluster on the
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master/controller nodes, this small Ceph cluster on the controller provides
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Glance image storage, Cinder block storage, Cinder backup storage, and Nova
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remote ephemeral block storage. For more information, see :ref:`Block Storage
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for Virtual Machines <block-storage-for-virtual-machines>`.
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.. _configuration-and-management-storage-on-controller-hosts-section-gpw-kxc-vlb:
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------------------
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Nova-local Storage
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------------------
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Controllers on |prod-os| Simplex or Duplex systems incorporate the Compute
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function, and therefore provide **nova- local** storage for ephemeral disks. On
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other systems, **nova- local** storage is provided by compute hosts. For more
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information about this type of storage, see :ref:`Storage on Compute Hosts
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<storage-on-compute-hosts>` and :ref:`Block Storage for Virtual Machines
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<block-storage-for-virtual-machines>`.
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