Mirantis Container Cloud (MCC) becomes part of Mirantis OpenStack for Kubernetes (MOSK)!
Starting with MOSK 25.2, the MOSK documentation set covers all product layers, including MOSK management (formerly Container Cloud). This means everything you need is in one place. Some legacy names may remain in the code and documentation and will be updated in future releases. The separate Container Cloud documentation site will be retired, so please update your bookmarks for continued easy access to the latest content.
Create LVM volume groups on top of RAID devices¶
TechPreview
You can configure an LVM volume group on top of mdadm-based RAID devices as
physical volumes using the BareMetalHostProfile
resource. List the
required RAID devices in a separate field of the volumeGroups
definition
within the storage configuration of BareMetalHostProfile
.
You can use flexible size
units throughout bare metal host profiles:
Ki
, Mi
, Gi
, and so on. For example, size: 100Mi
or
size: 1.5Gi
that will be serialized as 1536Mi
. The size without units
is counted in bytes. For example, size: 120
means 120 bytes.
Warning
All data will be wiped during cluster deployment on devices
defined directly or indirectly in the fileSystems
list of
BareMetalHostProfile
. For example:
A raw device partition with a file system on it
A device partition in a volume group with a logical volume that has a file system on it
An mdadm RAID device with a file system on it
An LVM RAID device with a file system on it
The wipe
field is always considered true
for these devices.
The false
value is ignored.
Therefore, to prevent data loss, move the necessary data from these file systems to another server beforehand, if required.
The following example illustrates an extract of BaremetalHostProfile
with
a volume group named lvm_nova
to be created on top of an mdadm-based
RAID device raid1
:
...
devices:
- device:
workBy: "by_id,by_wwn,by_path,by_name"
minSize: 60Gi
type: ssd
wipe: true
partitions:
- name: bios_grub
partflags:
- bios_grub
size: 4Mi
- name: uefi
partflags:
- esp
size: 200Mi
- name: config-2
size: 64Mi
- device:
workBy: "by_id,by_wwn,by_path,by_name"
minSize: 30Gi
type: ssd
wipe: true
partitions:
- name: md0_part1
- device:
workBy: "by_id,by_wwn,by_path,by_name"
minSize: 30Gi
type: ssd
wipe: true
partitions:
- name: md0_part2
softRaidDevices:
- devices:
- partition: md0_part1
- partition: md0_part2
level: raid1
metadata: "1.0"
name: /dev/md0
volumeGroups:
- devices:
- softRaidDevice: /dev/md0
name: lvm_nova
...