OpenStack Ussuri : Use Cinder Storage (NFS)2020/06/09 |
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It's possible to use Virtual Storages provided by Cinder if an Instance needs more disks.
Configure Virtual storage with NFS backend on here.
------------+-------------------------+-------------------------+-------------+---
| | | |
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 | | L2 Agent | | Nova Compute | |
| Keystone Glance | | L3 Agent | | Open vSwitch | |
| Nova API | | Metadata Agent | | L2 Agent | |
| Neutron Server | | Cinder-Volume | | | |
| Metadata Agent | | | | | |
| Cinder API | | | | | |
+-----------------------+ +-----------------------+ +-----------------------+ |
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------------+-----------------------------------------------------------------+
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eth0|10.0.0.35
+----------+-----------+
| [ NFS Server ] |
| |
+----------------------+
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| [1] |
NFS server is required to be running on your LAN, refer to here.
On this example, configure [/var/lib/nfs-share] directory on [nfs.srv.world] as a shared directory. |
| [2] | Configure Storage Node. |
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[root@storage ~]#
dnf -y install nfs-utils
[root@storage ~]#
vi /etc/idmapd.conf # line 5: uncomment and change to your domain name Domain = srv.world
[root@storage ~]#
vi /etc/cinder/cinder.conf # add follows in [DEFAULT] section enabled_backends = nfs # add follows to the end [nfs] volume_driver = cinder.volume.drivers.nfs.NfsDriver nfs_shares_config = /etc/cinder/nfs_shares nfs_mount_point_base = $state_path/mnt
[root@storage ~]#
vi /etc/cinder/nfs_shares # create new : specify NFS shared directory # if set multiple share, write one per line nfs.srv.world:/var/lib/nfs-share chmod 640 /etc/cinder/nfs_shares [root@storage ~]# chgrp cinder /etc/cinder/nfs_shares [root@storage ~]# systemctl restart openstack-cinder-volume [root@storage ~]# chown -R cinder. /var/lib/cinder/mnt |
| [3] | Change Nova settings on Compute Node to mount NFS. |
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[root@node01 ~]#
dnf -y install nfs-utils
[root@node01 ~]#
vi /etc/idmapd.conf # line 5: uncomment and change to your domain name Domain = srv.world
[root@node01 ~]#
vi /etc/nova/nova.conf # add to the end [cinder] os_region_name = RegionOne
[root@node01 ~]#
systemctl restart openstack-nova-compute
# if SELinux is enabled, change policy like follows
[root@node01 ~]#
vi iscsiadm.te # create new
module iscsiadm 1.0;
require {
type iscsid_t;
class capability dac_override;
}
#============= iscsid_t ==============
allow iscsid_t self:capability dac_override;
checkmodule -m -M -o iscsiadm.mod iscsiadm.te [root@node01 ~]# semodule_package --outfile iscsiadm.pp --module iscsiadm.mod [root@node01 ~]# semodule -i iscsiadm.pp |
| [4] | Login as a common user you'd like to add volumes to own instances. For example, create a virtual disk [disk01] with 10GB. It's OK to work on any node. (example below is on Control Node) |
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# set environment variable [cent@dlp ~(keystone)]$ 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 | 2020-06-08T08:25:13.000000 | | description | None | | encrypted | False | | id | 69ecf44a-a89e-4087-9499-7d789a79206e | | 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 | 0e4117de456a4bbaa5aac2cc6507be91 | +---------------------+--------------------------------------+[cent@dlp ~(keystone)]$ openstack volume list +--------------------------------------+--------+-----------+------+-------------+ | ID | Name | Status | Size | Attached to | +--------------------------------------+--------+-----------+------+-------------+ | 69ecf44a-a89e-4087-9499-7d789a79206e | 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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[cent@dlp ~(keystone)]$ openstack server list +--------------------------------------+----------+---------+------------------------------------+---------+----------+ | ID | Name | Status | Networks | Image | Flavor | +--------------------------------------+----------+---------+------------------------------------+---------+----------+ | 2929c442-26c4-41cb-b95f-98c3adceb3ef | CentOS_8 | SHUTOFF | int_net=192.168.100.24, 10.0.0.247 | CentOS8 | m1.small | +--------------------------------------+----------+---------+------------------------------------+---------+----------+
[cent@dlp ~(keystone)]$
openstack server add volume CentOS_8 disk01
# the status of attached disk turns [in-use] like follows [cent@dlp ~(keystone)]$ openstack volume list +--------------------------------------+--------+--------+------+-----------------------------------+ | ID | Name | Status | Size | Attached to | +--------------------------------------+--------+--------+------+-----------------------------------+ | 69ecf44a-a89e-4087-9499-7d789a79206e | disk01 | in-use | 10 | Attached to CentOS_8 on /dev/vdb | +--------------------------------------+--------+--------+------+-----------------------------------+ # detach the disk [cent@dlp ~(keystone)]$ openstack server remove volume CentOS_8 disk01 |
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