OpenStack Wallaby : Use Cinder Storage (LVM)2021/04/19 |
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It's possible to use Virtual Storages provided by Cinder if an Instance needs more disks.
Configure Virtual storage with LVM backend on here.
It needs there are some free spaces on disks of Storage Node.
------------+---------------------------+---------------------------+------------
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eth0|10.0.0.30 eth0|10.0.0.50 eth0|10.0.0.51
+-----------+-----------+ +-----------+-----------+ +-----------+-----------+
| [ Control Node ] | | [ Storage Node ] | | [ Compute Node ] |
| | | | | |
| MariaDB RabbitMQ | | Open vSwitch | | Libvirt |
| Memcached httpd | | Neutron Server | | Nova Compute |
| Keystone Glance | | OVN-Northd | | Open vSwitch |
| Nova API | | Cinder Volume | | OVN Metadata Agent |
| Cinder API | | iSCSI Target | | OVN-Controller |
+-----------------------+ +-----------------------+ +-----------------------+
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| [1] | Create a volume group for Cinder on Storage Node. |
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root@storage:~# pvcreate /dev/sdb1 Physical volume "/dev/sdb1" successfully created root@storage:~# vgcreate -s 32M vg_volume01 /dev/sdb1 Volume group "vg_volume01" successfully created |
| [2] | Configure Cinder Volume on Storage Node. |
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root@storage:~#
apt -y install targetcli-fb
root@storage:~#
vi /etc/cinder/cinder.conf # add the value to [enabled_backends] param enabled_backends = lvm
# add to the end [lvm] target_helper = lioadm target_protocol = iscsi # IP address of Storage Node target_ip_address = 10.0.0.50 # volume group name created on [1] volume_group = vg_volume01 volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver volumes_dir = $state_path/volumes systemctl restart cinder-volume
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| [3] | Configure Nova on Compute Node. |
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root@node01:~#
vi /etc/nova/nova.conf # add to the end [cinder] os_region_name = RegionOne systemctl restart nova-compute
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| [4] | Login as a common user you'd like to add volumes to own instances. For example, create a virtual disk [disk01] with 10GB. It's OK to work on any node. (example below is on Control Node) |
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# set environment variable ubuntu@dlp ~(keystone)$ echo "export OS_VOLUME_API_VERSION=3" >> ~/keystonerc ubuntu@dlp ~(keystone)$ source ~/keystonerc
openstack volume create --size 10 disk01 +---------------------+--------------------------------------+ | Field | Value | +---------------------+--------------------------------------+ | attachments | [] | | availability_zone | nova | | bootable | false | | consistencygroup_id | None | | created_at | 2021-04-19T04:28:20.682774 | | description | None | | encrypted | False | | id | 4c51813f-0c14-44f4-b6ba-508ea96e936a | | multiattach | False | | name | disk01 | | properties | | | replication_status | None | | size | 10 | | snapshot_id | None | | source_volid | None | | status | creating | | type | __DEFAULT__ | | updated_at | None | | user_id | 3ebb8ec1b4fc467da96379caef902df7 | +---------------------+--------------------------------------+ubuntu@dlp ~(keystone)$ openstack volume list +--------------------------------------+--------+-----------+------+-------------+ | ID | Name | Status | Size | Attached to | +--------------------------------------+--------+-----------+------+-------------+ | 4c51813f-0c14-44f4-b6ba-508ea96e936a | disk01 | available | 10 | | +--------------------------------------+--------+-----------+------+-------------+ |
| [5] | Attach the virtual disk to an Instance. For the exmaple below, the disk is connected as [/dev/vdb]. It's possible to use it as a storage to create a file system on it. |
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ubuntu@dlp ~(keystone)$ openstack server list +--------------------------------------+-------------+---------+-------------------------------------+------------+----------+ | ID | Name | Status | Networks | Image | Flavor | +--------------------------------------+-------------+---------+-------------------------------------+------------+----------+ | 675fa368-4534-4d38-bc14-319a90f09470 | Ubuntu-2004 | SHUTOFF | private=10.0.0.207, 192.168.100.169 | Ubuntu2004 | m1.small | +--------------------------------------+-------------+---------+-------------------------------------+------------+----------+
ubuntu@dlp ~(keystone)$
openstack server add volume Ubuntu-2004 disk01
# the status of attached disk turns [in-use] like follows ubuntu@dlp ~(keystone)$ openstack volume list +--------------------------------------+--------+--------+------+--------------------------------------+ | ID | Name | Status | Size | Attached to | +--------------------------------------+--------+--------+------+--------------------------------------+ | 4c51813f-0c14-44f4-b6ba-508ea96e936a | disk01 | in-use | 10 | Attached to Ubuntu-2004 on /dev/vdb | +--------------------------------------+--------+--------+------+--------------------------------------+ # detach the disk ubuntu@dlp ~(keystone)$ openstack server remove volume Ubuntu-2004 disk01 |
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