OpenStack Caracal : Use Cinder Storage (LVM)2024/08/07 |
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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.
------------+--------------------------+--------------------------+------------
| | |
eth0|10.0.0.30 eth0|10.0.0.50 eth0|10.0.0.51
+-----------+-----------+ +-----------+-----------+ +-----------+-----------+
| [ dlp.srv.world ] | | [ network.srv.world ] | | [ node01.srv.world ] |
| (Control Node) | | (Network Node) | | (Compute Node) |
| | | | | |
| MariaDB RabbitMQ | | Open vSwitch | | Libvirt |
| Memcached Nginx | | Neutron Server | | Nova Compute |
| Keystone httpd | | OVN-Northd | | Open vSwitch |
| Glance Nova API | | Nginx iSCSI Target | | OVN Metadata Agent |
| Cinder API | | Cinder Volume | | OVN-Controller |
+-----------------------+ +-----------------------+ +-----------------------+
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| [1] | Create a volume group for Cinder on Storage Node. |
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[root@network ~]# pvcreate /dev/sdb1 Physical volume "/dev/sdb1" successfully created [root@network ~]# 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@network ~]#
vi /etc/cinder/cinder.conf # add follows into [DEFAULT] section enabled_backends = lvm # add follows to last line [lvm] target_helper = lioadm target_protocol = iscsi target_ip_address = $my_ip # volume group name just created volume_group = vg_volume01 volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver volumes_dir = $state_path/volumes systemctl restart openstack-cinder-volume |
| [3] | On Storage Node, If Firewalld is running, allow service ports. |
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[root@network ~]# firewall-cmd --add-service=iscsi-target success [root@network ~]# firewall-cmd --runtime-to-permanent success |
| [4] | Configure Nova on Compute Node. |
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[root@node01 ~]#
vi /etc/nova/nova.conf # add into the [keystone_authtoken] section [keystone_authtoken] ..... ..... service_token_roles = service service_token_roles_required = true # add to last line [service_user] send_service_user_token = true auth_url = https://dlp.srv.world:5000 auth_type = password project_domain_name = Default user_domain_name = Default project_name = service username = nova password = servicepassword insecure = false [cinder] os_region_name = RegionOne
[root@node01 ~]#
systemctl restart openstack-nova-compute
# if SELinux enabled, change policy like follows
[root@node01 ~]#
vi iscsiadm.te # create new
module iscsiadm 1.0;
require {
type iscsid_t;
class capability dac_override;
}
#============= iscsid_t ==============
allow iscsid_t self:capability dac_override;
checkmodule -m -M -o iscsiadm.mod iscsiadm.te [root@node01 ~]# semodule_package --outfile iscsiadm.pp --module iscsiadm.mod [root@node01 ~]# semodule -i iscsiadm.pp |
| [5] | Login as an openstack user and add volumes to your instances. For example, create a virtual disk [disk01] with 10GB. It's OK to work on any node. (example below is on Control Node) |
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# set environment variable [cent@dlp ~(keystone)]$ echo "export OS_VOLUME_API_VERSION=3" >> ~/keystonerc [cent@dlp ~(keystone)]$ source ~/keystonerc
openstack volume create --size 10 disk01 +---------------------+--------------------------------------+ | Field | Value | +---------------------+--------------------------------------+ | attachments | [] | | availability_zone | nova | | bootable | false | | consistencygroup_id | None | | created_at | 2024-08-07T01:22:28.718832 | | description | None | | encrypted | False | | id | efcd48f8-51ca-41a2-8544-e04e5aa1c64d | | 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 | 8a9b46168b42480f889ad4fad3ca6ee4 | +---------------------+--------------------------------------+[cent@dlp ~(keystone)]$ openstack volume list +--------------------------------------+--------+-----------+------+-------------+ | ID | Name | Status | Size | Attached to | +--------------------------------------+--------+-----------+------+-------------+ | efcd48f8-51ca-41a2-8544-e04e5aa1c64d | disk01 | available | 10 | | +--------------------------------------+--------+-----------+------+-------------+ |
| [6] | Attach the virtual disk to an Instance. For the example 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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[cent@dlp ~(keystone)]$ openstack server list +--------------------------------------+------------+---------+------------------------------------+----------------+----------+ | ID | Name | Status | Networks | Image | Flavor | +--------------------------------------+------------+---------+------------------------------------+----------------+----------+ | 1d0c2140-098d-4a1a-a705-82d7755d7c84 | CentOS-St9 | SHUTOFF | private=10.0.0.250, 192.168.100.65 | CentOS-Stream9 | m1.small | +--------------------------------------+------------+---------+------------------------------------+----------------+----------+[cent@dlp ~(keystone)]$ openstack server add volume CentOS-St9 disk01 +-----------------------+--------------------------------------+ | Field | Value | +-----------------------+--------------------------------------+ | ID | efcd48f8-51ca-41a2-8544-e04e5aa1c64d | | Server ID | 1d0c2140-098d-4a1a-a705-82d7755d7c84 | | Volume ID | efcd48f8-51ca-41a2-8544-e04e5aa1c64d | | Device | /dev/vdb | | Tag | None | | Delete On Termination | False | +-----------------------+--------------------------------------+ # the status of attached disk turns [in-use] like follows [cent@dlp ~(keystone)]$ openstack volume list +--------------------------------------+--------+--------+------+-------------------------------------+ | ID | Name | Status | Size | Attached to | +--------------------------------------+--------+--------+------+-------------------------------------+ | efcd48f8-51ca-41a2-8544-e04e5aa1c64d | disk01 | in-use | 10 | Attached to CentOS-St9 on /dev/vdb | +--------------------------------------+--------+--------+------+-------------------------------------+ # detach the disk [cent@dlp ~(keystone)]$ openstack server remove volume CentOS-St9 disk01 |
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