Default configuration of the host system storage¶
The default host profile requires three storage devices in the following strict order:
- Boot device and operating system storage
This device contains boot data and operating system data. It is partitioned using the GUID Partition Table (GPT) labels. The root file system is an
ext4
file system created on top of an LVM logical volume. For a detailed layout, refer to the table below.
- Local volumes device
This device contains an
ext4
file system with directories mounted as persistent volumes to Kubernetes. These volumes are used by the Mirantis Container Cloud services to store its data, including monitoring and identity databases.
- Ceph storage device
This device is used as a Ceph datastore or Ceph OSD on managed clusters. It is used as a Ceph datastore or Ceph OSD.
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 table summarizes the default configuration of the host system storage set up by the Container Cloud bare metal management.
Device/partition |
Name/Mount point |
Recommended size, GB |
Description |
---|---|---|---|
|
|
4 MiB |
The mandatory GRUB boot partition required for non-UEFI systems. |
|
|
0.2 GiB |
The boot partition required for the UEFI boot mode. |
|
|
64 MiB |
The mandatory partition for the |
|
|
100% of the remaining free space in the LVM volume group |
The main LVM physical volume that is used to create the root file system. |
|
|
100% of the remaining free space in the LVM volume group |
The LVM physical volume that is used to create the file system
for |
|
|
100% of the remaining free space in the LVM volume group |
Clean raw disk that is used for the Ceph storage back end on managed clusters. |
If required, you can customize the default host storage configuration. For details, see Create a custom host profile.