cinder连接LVM存储后端¶
Table of Contents:
目标¶
创建增加cinder volume时volume type
[root@overcloud-controller-0 cinder]# cinder type-list
+--------------------------------------+--------------+--------------------------+-----------+
| ID | Name | Description | Is_Public |
+--------------------------------------+--------------+--------------------------+-----------+
| 289f591e-59a9-4f93-9549-eb553941240b | tripleo-ceph | ceph tripleo backend | True |
| d259562a-b958-4bb1-8149-15429ffd71af | cinderlvm | LVM test on controller-0 | False |
+--------------------------------------+--------------+--------------------------+-----------+
准备物理环境¶
安装必要软件
rpm -ivh perl-Config-General-2.61-1.el7.noarch.rpm
rpm -ivh scsi-target-utils-1.0.55-4.el7.x86_64.rpm
创建loop设备
由于节点已经没有多余裸盘可以用，所以从controller-0划出一部分空间挂载为loop设备:
dd if=/dev/zero of=/cinder-test.dontdelete bs=1 count=0 seek=100G
losetup /dev/loop3 /var/lib/cinder/cinder-test.dontdelete
创建physical volume
[root@overcloud-controller-0 cinder]#pvcreate /dev/loop3
[root@overcloud-controller-0 cinder]#pvdisplay
--- Physical volume ---
PV Name /dev/loop3
VG Name cinderlvm
PV Size 100.00 GiB / not usable 4.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 25599
Free PE 25599
Allocated PE 0
PV UUID 6Zpmmb-EjKi-PlHQ-ojon-9hJT-olHH-mMvhSW
创建volume group
[root@overcloud-controller-0 cinder]#vgcreate cinderlvm /dev/loop3
[root@overcloud-controller-0 cinder]#vgdisplay
--- Volume group ---
VG Name cinderlvm
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 100.00 GiB
PE Size 4.00 MiB
Total PE 25599
Alloc PE / Size 0 / 0
Free PE / Size 25599 / 100.00 GiB
VG UUID AyVZbf-FAIY-agzq-Hd3O-j7cx-sdiy-X03NkO
修改cinder配置文件¶
查看当前配置
[root@overcloud-controller-0 cinder]# crudini --get /etc/cinder/cinder.conf DEFAULT enabled_backends
tripleo-ceph
增加存储后端
[root@overcloud-controller-0 cinder]# crudini --set /etc/cinder/cinder.conf DEFAULT enabled_backends tripleo-ceph,lvmtest
在/etc/cinder/cinder.conf中增加lvmtest段落
[lvmtest] """对应[DEFAULT]段落中的enabled_backends"""
volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver
volume_group = cinderlvm
iscsi_helper = tgtadm
volume_backend_name = lvmtest-renbin
创建volume type
[root@overcloud-controller-0 cinder]# cinder type-create cinderlvm
[root@overcloud-controller-0 cinder]# cinder type-key cinderlvm set volume_backend_name=lvmtest-renbin
[root@overcloud-controller-0 cinder]# cinder extra-specs-list
+--------------------------------------+--------------+---------------------------------------------+
| ID | Name | extra_specs |
+--------------------------------------+--------------+---------------------------------------------+
| 289f591e-59a9-4f93-9549-eb553941240b | tripleo-ceph | {u'volume_backend_name': u'tripleo-ceph'} |
| d259562a-b958-4bb1-8149-15429ffd71af | cinderlvm | {u'volume_backend_name': u'lvmtest-renbin'} |
+--------------------------------------+--------------+---------------------------------------------+
重启cinder服务
[root@overcloud-controller-0 cinder]#pcs resource restart openstack-cinder-scheduler-clone
[root@overcloud-controller-0 cinder]#pcs resource restart openstack-cinder-api-clone
[root@overcloud-controller-0 cinder]#pcs resource restart openstack-cinder-volume
测试创建volume
[root@overcloud-controller-0 cinder]# cinder create --name testlvm --volume-type cinderlvm 10
+---------------------------------------+--------------------------------------+
| Property | Value |
+---------------------------------------+--------------------------------------+
| attachments | [] |
| availability_zone | nova |
| bootable | false |
| consistencygroup_id | None |
| created_at | 2018-01-19T06:46:37.000000 |
| description | None |
| encrypted | False |
| id | c4b247a8-9808-4bcf-a7b2-080b4cc2b0f9 |
| metadata | {} |
| migration_status | None |
| multiattach | False |
| name | testlvm |
| os-vol-host-attr:host | None |
| os-vol-mig-status-attr:migstat | None |
| os-vol-mig-status-attr:name_id | None |
| os-vol-tenant-attr:tenant_id | dcbb3cd11f48438383d6232af95b7d93 |
| os-volume-replication:driver_data | None |
| os-volume-replication:extended_status | None |
| replication_status | disabled |
| size | 10 |
| snapshot_id | None |
| source_volid | None |
| status | creating |
| user_id | 1c3c35d5e1bb4c8c8d78c276661af2a9 |
| volume_type | cinderlvm |
+---------------------------------------+--------------------------------------+