OpenStack Mitaka : Use Cinder Storage (GlusterFS)
2016/06/05 |
It's possible to use Virtual Storages provided by Cinder if an Instance needs more disks.
Configure Virtual storage with GlusterFS backend on here.
+------------------+ +------------------+ 10.0.0.50| [ Storage Node ] | 10.0.0.61| | +------------------+ +-----+ Cinder-Volume | +-----+ GlusterFS #1 | | [ Control Node ] | | eth0| | | eth0| | | Keystone |10.0.0.30 | +------------------+ | +------------------+ | Glance |------------+------------------------------+ | Nova API |eth0 | +------------------+ | +------------------+ | Cinder API | | eth0| [ Compute Node ] | | eth0| | +------------------+ +-----+ Nova Compute | +-----+ GlusterFS #2 | 10.0.0.51| | 10.0.0.62| | +------------------+ +------------------+ |
[1] |
GlusterFS server is required to be running on your LAN, refer to here.
This example uses a replication volume "vol_replica" provided by "glfs01" and "glfs02". |
[2] | Configure Storage Node. |
root@storage:~#
apt-get -y install glusterfs-client
root@storage:~#
vi /etc/cinder/cinder.conf # add follows in the [DEFAULT] section enabled_backends = glusterfs # add follwos to the end [glusterfs] volume_driver = cinder.volume.drivers.glusterfs.GlusterfsDriver glusterfs_shares_config = /etc/cinder/glusterfs_shares glusterfs_mount_point_base = $state_path/mnt_gluster
root@storage:~#
vi /etc/cinder/glusterfs_shares # create new : specify GlusterFS volumes glfs01.srv.world:/vol_replica chmod 640 /etc/cinder/glusterfs_shares root@storage:~# chgrp cinder /etc/cinder/glusterfs_shares root@storage:~# systemctl restart cinder-volume |
[3] | Configure Compute Node to mount GlusterFS volume. |
root@node01:~#
apt-get -y install glusterfs-client
root@node01:~#
vi /etc/nova/nova.conf # add follows in the [DEFAULT] section volume_api_class = nova.volume.cinder.API systemctl restart nova-compute |
[4] | For example, create a virtual disk "disk01" with 10GB. It's OK to work on any node. (This example is on Control Node) |
# set environment variable first root@dlp ~(keystone)# echo "export OS_VOLUME_API_VERSION=2" >> ~/keystonerc root@dlp ~(keystone)# source ~/keystonerc
cinder create --display_name disk01 10 +--------------------------------+--------------------------------------+ | Property | Value | +--------------------------------+--------------------------------------+ | attachments | [] | | availability_zone | nova | | bootable | false | | consistencygroup_id | None | | created_at | 2016-06-06T12:58:17.000000 | | description | None | | encrypted | False | | id | 7c5b359f-a30b-4d26-844b-239d897d15ba | | metadata | {} | | migration_status | None | | multiattach | False | | name | disk01 | | 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 | 61bb62a97e394b8db8f95aa05a678771 | | replication_status | disabled | | size | 10 | | snapshot_id | None | | source_volid | None | | status | creating | | updated_at | None | | user_id | 45bb5ebf547f4be2a21bf4a07c83ad85 | | volume_type | None | +--------------------------------+--------------------------------------+root@dlp ~(keystone)# cinder list +--------------------------------------+-----------+--------+------+-------------+----------+-------------+ | ID | Status | Name | Size | Volume Type | Bootable | Attached to | +--------------------------------------+-----------+--------+------+-------------+----------+-------------+ | 7c5b359f-a30b-4d26-844b-239d897d15ba | available | disk01 | 10 | - | false | | +--------------------------------------+-----------+--------+------+-------------+----------+-------------+ |
[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. |
root@dlp ~(keystone)# nova list +--------------------------------------+-------------+---------+------------+-------------+-----------------------------------+ | ID | Name | Status | Task State | Power State | Networks | +--------------------------------------+-------------+---------+------------+-------------+-----------------------------------+ | 545457b2-517f-4a3b-bae2-bb99beb8342a | Ubuntu_1604 | SHUTOFF | - | Shutdown | int_net=192.168.100.3, 10.0.0.201 | +--------------------------------------+-------------+---------+------------+-------------+-----------------------------------+root@dlp ~(keystone)# nova volume-attach Ubuntu_1604 7c5b359f-a30b-4d26-844b-239d897d15ba auto +----------+--------------------------------------+ | Property | Value | +----------+--------------------------------------+ | device | /dev/vdb | | id | 7c5b359f-a30b-4d26-844b-239d897d15ba | | serverId | 545457b2-517f-4a3b-bae2-bb99beb8342a | | volumeId | 7c5b359f-a30b-4d26-844b-239d897d15ba | +----------+--------------------------------------+ # the status of attached disk turns "in-use" like follows root@dlp ~(keystone)# cinder list +--------------------------------------+--------+--------+------+-------------+----------+--------------------------------------+ | ID | Status | Name | Size | Volume Type | Bootable | Attached to | +--------------------------------------+--------+--------+------+-------------+----------+--------------------------------------+ | 7c5b359f-a30b-4d26-844b-239d897d15ba | in-use | disk01 | 10 | - | false | 545457b2-517f-4a3b-bae2-bb99beb8342a | +--------------------------------------+--------+--------+------+-------------+----------+--------------------------------------+ |