Create LVM volume groups on top of RAID devices¶
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
within the storage configuration of
You can use flexible
size units throughout bare metal host profiles.
For example, you can now use either
sizeGiB: 0.1 or
when specifying a device size.
Mirantis recommends using only one parameter name type and units throughout
the configuration files. If both
size are used,
sizeGiB is ignored during deployment and the suffix is adjusted
accordingly. For example,
1.5Gi will be serialized as
1536Mi. The size
without units is counted in bytes. For example,
size: 120 means 120 bytes.
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
wipe field is always considered
true for these devices.
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
a volume group named
lvm_nova to be created on top of an mdadm-based
... 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 ...