gitea-pages/admin-guide/deployment/partitioning.rst

Partitioning

Default Partitioning

Partitions system are configured with a standard schema using LVM, so that they can be possibly changed afterwards.

By default the whole space available on the first block device is used and any existing partition is removed.

Alternatively you might set the sysdb attribute system_disk with the device name of the disk which should be used instead:

bob node set-attr $FQDN system_disk=md126

The default partition schema for RHEL 7 is:

• create one primary /boot partition of 1Gb;
• create the vg_root Volume Group that uses the rest of the disk;

• on vg_root create the following logical volumes:

  • lv_root of 12 Gb size for /root;
  • lv_var of 8 Gb size for /var;
  • lv_var_log of 2 Gb size for /var/log;
  • lv_tmp of 2 Gb size for /tmp.

For RHEL 8 it is:

• create one primary /boot partition of 1Gb;
• create the vg_root Volume Group that uses the rest of the disk;

• on vg_root create the following logical volumes:

  • lv_root of 14 Gb size for /root;
  • lv_home of 2 Gb size for /home;
  • lv_var of 8 Gb size for /var;
  • lv_var_log of 3 Gb size for /var/log;
  • lv_var_tmp of 2 Gb size for /var/log;
  • lv_tmp of 2 Gb size for /tmp.

Partial Custom Partitioning

To increase these sizes of the above listed default volumes, you might use vgroot::path <../puppet/profiles/vgroot> in Hiera:

vgroot::path:
  lv_root: 50GB
  lv_var: 30GB

To add a new volume to the system disk (Volume Group vg_root), you need to address the lvm Puppet module directly in Hiera:

lvm::volume_groups:
vg_root:
  physical_volumes:
    - /dev/nvme0n1p3
  logical_volumes:
    lv_data:
      size: 3TB
      fs_type: 'xfs'
      mountpath: '/mnt/data'
      size_is_minsize: true

Please note that you need also to list the partition on which vg_root is located.

The same you can do to add partitions outside of the system disk, but here you need to define the full LVM volume group:

lvm::volume_groups:
  vg_data:
    physical_volumes:
      - '/dev/sdb'
    logical_volumes:
      lv_usr_local:
        mountpath: '/usr/local'
        fs_type: 'xfs'

Full Custom Partitioning

It is possible to customize the partitioning by using the partitions attribute on sysdb.

The partitions attribute can take two values:

• manual: this will not partition the disks and the installation process will wait for manual partitioning;
• <URL>: it is assumed to be a file containing the partitioning commands as used in kickstart.

If it is not possible to download the given URL the system fails-back to manual at installation time. Please also note that no check is done on the URL content.