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OpenStack Ocata : Cinder Storage (Multi-BackEnds)
2017/03/05 |
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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 and NFS Multi-Backend on here.
------------+--------------------------+--------------------------+-------------------------+------------
| | | |
eth0|10.0.0.30 eth0|10.0.0.50 eth0|10.0.0.51 eth0|10.0.0.35
+-----------+-----------+ +-----------+-----------+ +-----------+-----------+ +----------+-----------+
| [ Control Node ] | | [ Storage Node ] | | [ Compute Node ] | | [ NFS Server ] |
| | | | | | | |
| MariaDB RabbitMQ | | Open vSwitch | | Libvirt | +----------------------+
| Memcached httpd | | L2,L3,Metadata Agent | | Nova Compute |
| Keystone Glance | | Cinder-Volume | | Open vSwitch |
| Nova API | | iSCSI Target | | L2 Agent |
| Neutron Server | | | | |
| Cinder API | | | | |
+-----------------------+ +-----------------------+ +-----------------------+
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| [1] |
For LVM backend on this example, use a volume group [vg_volume01] for it.
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| [2] |
NFS server is required to be running on your LAN, refer to here.
On this example, configure [/var/nfs-share] directory on "nfs.srv.world" as a shared directory. |
| [3] | Configure Storage Node. |
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[root@storage ~]#
yum -y install nfs-utils
[root@storage ~]#
vi /etc/idmapd.conf # line 5: uncomment and change to the own domain name Domain = srv.world
[root@storage ~]#
vi /etc/cinder/cinder.conf # add follows in the [DEFAULT] section enabled_backends = lvm,nfs # add follows to the end [lvm] iscsi_helper = lioadm volume_group = vg_volume01 # IP address of Storage Node iscsi_ip_address = 10.0.0.50 volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver volumes_dir = $state_path/volumes iscsi_protocol = iscsi [nfs] volume_driver = cinder.volume.drivers.nfs.NfsDriver volume_backend_name = NFS nfs_shares_config = /etc/cinder/nfs_shares nfs_mount_point_base = $state_path/mnt_nfs
[root@storage ~]#
vi /etc/cinder/nfs_shares # create new : specify NFS shared directories nfs.srv.world:/var/nfs-share chmod 640 /etc/cinder/nfs_shares [root@storage ~]# chgrp cinder /etc/cinder/nfs_shares [root@storage ~]# systemctl restart openstack-cinder-volume [root@storage ~]# chown -R cinder. /var/lib/cinder/mnt_nfs |
| [4] | Configure Compute Node. |
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[root@node01 ~]#
yum -y install nfs-utils
[root@node01 ~]#
vi /etc/idmapd.conf # line 5: uncomment and change to the own domain name Domain = srv.world
[root@node01 ~]#
vi /etc/nova/nova.conf # add follows to the end [cinder] os_region_name = RegionOne systemctl restart openstack-nova-compute |
| [5] | Create volume types. It's OK to work on any node. (This example is on Control Node) |
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# set environment variable first [root@dlp ~(keystone)]# echo "export OS_VOLUME_API_VERSION=2" >> ~/keystonerc [root@dlp ~(keystone)]# source ~/keystonerc
openstack volume type create lvm +-------------+--------------------------------------+ | Field | Value | +-------------+--------------------------------------+ | description | None | | id | 5c2ae2be-5fbe-41a2-a3a7-98255c29cbdc | | is_public | True | | name | lvm | +-------------+--------------------------------------+[root@dlp ~(keystone)]# openstack volume type create nfs +-------------+--------------------------------------+ | Field | Value | +-------------+--------------------------------------+ | description | None | | id | d622ffa6-90b6-47cf-9070-109617ecdca9 | | is_public | True | | name | nfs | +-------------+--------------------------------------+[root@dlp ~(keystone)]# openstack volume type list +--------------------------------------+------+-----------+ | ID | Name | Is Public | +--------------------------------------+------+-----------+ | 5c2ae2be-5fbe-41a2-a3a7-98255c29cbdc | lvm | True | | d622ffa6-90b6-47cf-9070-109617ecdca9 | nfs | True | +--------------------------------------+------+-----------+ |
| [6] | Create volumes with specifying volume types. |
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[root@dlp ~(keystone)]# openstack volume create --type lvm --size 10 disk_lvm +---------------------+--------------------------------------+ | Field | Value | +---------------------+--------------------------------------+ | attachments | [] | | availability_zone | nova | | bootable | false | | consistencygroup_id | None | | created_at | 2017-03-05T06:28:39.903021 | | description | None | | encrypted | False | | id | b73e48b7-ba7e-485a-b9cc-5e1cfd1f3879 | | migration_status | None | | multiattach | False | | name | disk_lvm | | properties | | | replication_status | None | | size | 10 | | snapshot_id | None | | source_volid | None | | status | creating | | type | lvm | | updated_at | None | | user_id | cf3c5cbcdd214707b91d322a69af038e | +---------------------+--------------------------------------+[root@dlp ~(keystone)]# openstack volume create --type nfs --size 10 disk_nfs +---------------------+--------------------------------------+ | Field | Value | +---------------------+--------------------------------------+ | attachments | [] | | availability_zone | nova | | bootable | false | | consistencygroup_id | None | | created_at | 2017-03-05T06:28:56.732190 | | description | None | | encrypted | False | | id | 8c179ba4-dd4b-406d-9263-143f5e1da009 | | migration_status | None | | multiattach | False | | name | disk_nfs | | properties | | | replication_status | None | | size | 10 | | snapshot_id | None | | source_volid | None | | status | creating | | type | nfs | | updated_at | None | | user_id | cf3c5cbcdd214707b91d322a69af038e | +---------------------+--------------------------------------+[root@dlp ~(keystone)]# openstack volume list +--------------------------------------+--------------+-----------+------+-------------+ | ID | Display Name | Status | Size | Attached to | +--------------------------------------+--------------+-----------+------+-------------+ | 8c179ba4-dd4b-406d-9263-143f5e1da009 | disk_nfs | available | 10 | | | b73e48b7-ba7e-485a-b9cc-5e1cfd1f3879 | disk_lvm | available | 10 | | +--------------------------------------+--------------+-----------+------+-------------+ |
| [7] | Attache volume to an instance. |
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[root@dlp ~(keystone)]# openstack server list +-----------+----------+---------+-----------------------------------+------------+ | ID | Name | Status | Networks | Image Name | +-----------+----------+---------+-----------------------------------+------------+ | b17e0565- | CentOS_7 | SHUTOFF | int_net=192.168.100.5, 10.0.0.201 | CentOS7 | +-----------+----------+---------+-----------------------------------+------------+
[root@dlp ~(keystone)]#
openstack server add volume CentOS_7 disk_lvm [root@dlp ~(keystone)]# openstack server add volume CentOS_7 disk_nfs
# the status of attached disk turns "in-use" like follows [root@dlp ~(keystone)]# openstack volume list +--------------------------------------+--------------+--------+------+-----------------------------------+ | ID | Display Name | Status | Size | Attached to | +--------------------------------------+--------------+--------+------+-----------------------------------+ | 8c179ba4-dd4b-406d-9263-143f5e1da009 | disk_nfs | in-use | 10 | Attached to CentOS_7 on /dev/vdc | | b73e48b7-ba7e-485a-b9cc-5e1cfd1f3879 | disk_lvm | in-use | 10 | Attached to CentOS_7 on /dev/vdb | +--------------------------------------+--------------+--------+------+-----------------------------------+ # detach the disk [root@dlp ~(keystone)]# openstack server remove volume CentOS_7 disk_lvm [root@dlp ~(keystone)]# openstack server remove volume CentOS_7 disk_nfs |