23.6. 修改分区模式

您可以修改分区模式，以更改分区大小、创建新分区或删除现有分区。您可以使用以下环境变量来定义新的分区模式：

$ export DIB_BLOCK_DEVICE_CONFIG='<yaml_schema_with_partitions>'

以下 YAML 结构展示了修改后的逻辑卷分区布局，该布局拥有充足的空间，可拉取 overcloud 容器镜像：

export DIB_BLOCK_DEVICE_CONFIG='''
- local_loop:
    name: image0
- partitioning:
    base: image0
    label: mbr
    partitions:
      - name: root
        flags: [ boot,primary ]
        size: 40G
- lvm:
    name: lvm
    base: [ root ]
    pvs:
        - name: pv
          base: root
          options: [ "--force" ]
    vgs:
        - name: vg
          base: [ "pv" ]
          options: [ "--force" ]
    lvs:
        - name: lv_root
          base: vg
          extents: 23%VG
        - name: lv_tmp
          base: vg
          extents: 4%VG
        - name: lv_var
          base: vg
          extents: 45%VG
        - name: lv_log
          base: vg
          extents: 23%VG
        - name: lv_audit
          base: vg
          extents: 4%VG
        - name: lv_home
          base: vg
          extents: 1%VG
- mkfs:
    name: fs_root
    base: lv_root
    type: xfs
    label: "img-rootfs"
    mount:
        mount_point: /
        fstab:
            options: "rw,relatime"
            fsck-passno: 1
- mkfs:
    name: fs_tmp
    base: lv_tmp
    type: xfs
    mount:
        mount_point: /tmp
        fstab:
            options: "rw,nosuid,nodev,noexec,relatime"
            fsck-passno: 2
- mkfs:
    name: fs_var
    base: lv_var
    type: xfs
    mount:
        mount_point: /var
        fstab:
            options: "rw,relatime"
            fsck-passno: 2
- mkfs:
    name: fs_log
    base: lv_log
    type: xfs
    mount:
        mount_point: /var/log
        fstab:
            options: "rw,relatime"
            fsck-passno: 3
- mkfs:
    name: fs_audit
    base: lv_audit
    type: xfs
    mount:
        mount_point: /var/log/audit
        fstab:
            options: "rw,relatime"
            fsck-passno: 4
- mkfs:
    name: fs_home
    base: lv_home
    type: xfs
    mount:
        mount_point: /home
        fstab:
            options: "rw,nodev,relatime"
            fsck-passno: 2
'''

使用此示例 YAML 内容作为镜像分区模式的基础。修改分区大小和布局以符合您的需求。