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Introduce CephHciOsdCount and CephHciOsdType

CephHciOsdCount is the number of expected Ceph OSDs per HCI node.
CephHciOsdType is the type of data_device (not db_device) used for
each OSD and must be one of hdd, ssd, or nvme. These are used by
the Ansible module tripleo_derive_hci_parameters. Since CephOsdSpec,
as used by cephadm, might only specify a description of devices to
be used as OSDs (e.g. all devices), and not a list of devices like
CephAnsibleDisksConfig, setting the count directly is necessary in
order to know how much CPU/RAM to reserve. Similarly, because a
device path is not hard coded, we cannot look up that device in
Ironic to determine its type.

Closes-Bug: #1920954
Depends-On: Ia6bbdf023e2a0961cd91d3e9f40a8a5a26253ba3
Change-Id: Iccf97ca676ee6096e47474c571bd4f53381ce1c9
(cherry picked from commit f14bfb14c7)
changes/65/792165/2
John Fulton 7 months ago
parent
commit
e86165354e
  1. 32
      deployment/cephadm/ceph-osd.yaml
  2. 6
      releasenotes/notes/ceph-hci-osd-count-type-241614543ef7cc58.yaml

32
deployment/cephadm/ceph-osd.yaml

@ -41,6 +41,38 @@ parameters:
type: boolean
default: false
description: Parameter used to trigger the dashboard deployment.
CephHciOsdCount:
type: number
default: 0
tags:
- role_specific
description: |
The number of expected Ceph OSDs per HCI node. Used by Ansible
module tripleo_derive_hci_parameters when cephadm/HCI is used. Since
CephOsdSpec might only specify a description of devices to be used
as OSDs (e.g. all devices), and not a list of devices as found in
CephAnsibleDisksConfig, this number is necessary in order to know
how much CPU/RAM to reserve.
CephHciOsdType:
type: string
default: 'hdd'
tags:
- role_specific
constraints:
- allowed_values: ['hdd', 'ssd', 'nvme']
description: |
CephHciOsdType is the type of data_device (not db_device) used for each
HCI node's OSD and must be one of hdd, ssd, or nvme. Used by Ansible
module tripleo_derive_hci_parameters when cephadm/HCI is used. Since
CephOsdSpec might only specify a description of devices to be used
as OSDs (e.g. all devices), and not a list of devices as found in
CephAnsibleDisksConfig, the device path is not hard coded so we cannot
look up that device in Ironic to determine its type. If CephOsdSpec
has data_devices/rotational=1 and db_devices/rotational=0, then set
CephHciOsdType to 'hdd', since only the DB/WAL are on SSD. If an OSD
data device is an SSD or NVMe SSD, then set the type accordingly so
that the derive paramters module can allocate the optimal number of
CPUs per device.
resources:
CephBase:

6
releasenotes/notes/ceph-hci-osd-count-type-241614543ef7cc58.yaml

@ -0,0 +1,6 @@
---
features:
- |
The parameters CephHciOsdCount and CephHciOsdType were added in order to
support the derive parameters feature for hyperconverged deployments when
using cephadm.
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