CoprHD FC, iSCSI, and ScaleIO drivers

updated: 2021-10-28 23:18

CoprHD FC, iSCSI, and ScaleIO drivers¶

CoprHD is an open source software-defined storage controller and API platform. It enables policy-based management and cloud automation of storage resources for block, object and file storage providers. For more details, see CoprHD.

EMC ViPR Controller is the commercial offering of CoprHD. These same volume drivers can also be considered as EMC ViPR Controller Block Storage drivers.

System requirements¶

CoprHD version 3.0 is required. Refer to the CoprHD documentation for installation and configuration instructions.

If you are using these drivers to integrate with EMC ViPR Controller, use EMC ViPR Controller 3.0.

Supported operations¶

The following operations are supported:

Create, delete, attach, detach, retype, clone, and extend volumes.
Create, list, and delete volume snapshots.
Create a volume from a snapshot.
Copy a volume to an image.
Copy an image to a volume.
Clone a volume.
Extend a volume.
Retype a volume.
Get volume statistics.
Create, delete, and update consistency groups.
Create and delete consistency group snapshots.

Driver options¶

The following table contains the configuration options specific to the CoprHD volume driver.

Description of Coprhd volume driver configuration options¶
Configuration option = Default value	Description
[DEFAULT]
`coprhd_emulate_snapshot` = `False`	(Boolean) True \| False to indicate if the storage array in CoprHD is VMAX or VPLEX
`coprhd_hostname` = `None`	(String) Hostname for the CoprHD Instance
`coprhd_password` = `None`	(String) Password for accessing the CoprHD Instance
`coprhd_port` = `4443`	(Port number) Port for the CoprHD Instance
`coprhd_project` = `None`	(String) Project to utilize within the CoprHD Instance
`coprhd_scaleio_rest_gateway_host` = `None`	(String) Rest Gateway IP or FQDN for Scaleio
`coprhd_scaleio_rest_gateway_port` = `4984`	(Port number) Rest Gateway Port for Scaleio
`coprhd_scaleio_rest_server_password` = `None`	(String) Rest Gateway Password
`coprhd_scaleio_rest_server_username` = `None`	(String) Username for Rest Gateway
`coprhd_tenant` = `None`	(String) Tenant to utilize within the CoprHD Instance
`coprhd_username` = `None`	(String) Username for accessing the CoprHD Instance
`coprhd_varray` = `None`	(String) Virtual Array to utilize within the CoprHD Instance
`scaleio_server_certificate_path` = `None`	(String) Server certificate path
`scaleio_verify_server_certificate` = `False`	(Boolean) verify server certificate

Preparation¶

This involves setting up the CoprHD environment first and then configuring the CoprHD Block Storage driver.

CoprHD¶

The CoprHD environment must meet specific configuration requirements to support the OpenStack Block Storage driver.

CoprHD users must be assigned a Tenant Administrator role or a Project Administrator role for the Project being used. CoprHD roles are configured by CoprHD Security Administrators. Consult the CoprHD documentation for details.
A CorprHD system administrator must execute the following configurations using the CoprHD UI, CoprHD API, or CoprHD CLI:
- Create CoprHD virtual array
- Create CoprHD virtual storage pool
- Virtual Array designated for iSCSI driver must have an IP network created with appropriate IP storage ports
- Designated tenant for use
- Designated project for use

Note

Use each back end to manage one virtual array and one virtual storage pool. However, the user can have multiple instances of CoprHD Block Storage driver, sharing the same virtual array and virtual storage pool.

A typical CoprHD virtual storage pool will have the following values specified:
- Storage Type: Block
- Provisioning Type: Thin
- Protocol: iSCSI/Fibre Channel(FC)/ScaleIO
- Multi-Volume Consistency: DISABLED OR ENABLED
- Maximum Native Snapshots: A value greater than 0 allows the OpenStack user to take Snapshots

CoprHD drivers - Single back end¶

cinder.conf

Modify /etc/cinder/cinder.conf by adding the following lines, substituting values for your environment:

[coprhd-iscsi]
volume_driver = cinder.volume.drivers.coprhd.iscsi.EMCCoprHDISCSIDriver
volume_backend_name = coprhd-iscsi
coprhd_hostname = <CoprHD-Host-Name>
coprhd_port = 4443
coprhd_username = <username>
coprhd_password = <password>
coprhd_tenant = <CoprHD-Tenant-Name>
coprhd_project = <CoprHD-Project-Name>
coprhd_varray = <CoprHD-Virtual-Array-Name>
coprhd_emulate_snapshot = True or False, True if the CoprHD vpool has VMAX or VPLEX as the backing storage

If you use the ScaleIO back end, add the following lines:

coprhd_scaleio_rest_gateway_host = <IP or FQDN>
coprhd_scaleio_rest_gateway_port = 443
coprhd_scaleio_rest_server_username = <username>
coprhd_scaleio_rest_server_password = <password>
scaleio_verify_server_certificate = True or False
scaleio_server_certificate_path = <path-of-certificate-for-validation>

Specify the driver using the enabled_backends parameter:
```
enabled_backends = coprhd-iscsi
```
Note

To utilize the Fibre Channel driver, replace the volume_driver line above with:
```
volume_driver = cinder.volume.drivers.coprhd.fc.EMCCoprHDFCDriver
```
Note

To utilize the ScaleIO driver, replace the volume_driver line above with:
```
volume_driver = cinder.volume.drivers.coprhd.fc.EMCCoprHDScaleIODriver
```
Note

Set coprhd_emulate_snapshot to True if the CoprHD vpool has VMAX or VPLEX as the back-end storage. For these type of back-end storages, when a user tries to create a snapshot, an actual volume gets created in the back end.
Modify the rpc_response_timeout value in /etc/cinder/cinder.conf to at least 5 minutes. If this entry does not already exist within the cinder.conf file, add it in the [DEFAULT] section:
```
[DEFAULT]
# ...
rpc_response_timeout = 300
```
Now, restart the cinder-volume service.

Volume type creation and extra specs

Create OpenStack volume types:

$ openstack volume type create <typename>

Map the OpenStack volume type to the CoprHD virtual pool:

$ openstack volume type set <typename> --property CoprHD:VPOOL=<CoprHD-PoolName>

Map the volume type created to appropriate back-end driver:

$ openstack volume type set <typename> --property volume_backend_name=<VOLUME_BACKEND_DRIVER>

CoprHD drivers - Multiple back-ends¶

cinder.conf

Add or modify the following entries if you are planning to use multiple back-end drivers:
```
enabled_backends = coprhddriver-iscsi,coprhddriver-fc,coprhddriver-scaleio
```

Add the following at the end of the file:

[coprhddriver-iscsi]
volume_driver = cinder.volume.drivers.coprhd.iscsi.EMCCoprHDISCSIDriver
volume_backend_name = EMCCoprHDISCSIDriver
coprhd_hostname = <CoprHD Host Name>
coprhd_port = 4443
coprhd_username = <username>
coprhd_password = <password>
coprhd_tenant = <CoprHD-Tenant-Name>
coprhd_project = <CoprHD-Project-Name>
coprhd_varray = <CoprHD-Virtual-Array-Name>


[coprhddriver-fc]
volume_driver = cinder.volume.drivers.coprhd.fc.EMCCoprHDFCDriver
volume_backend_name = EMCCoprHDFCDriver
coprhd_hostname = <CoprHD Host Name>
coprhd_port = 4443
coprhd_username = <username>
coprhd_password = <password>
coprhd_tenant = <CoprHD-Tenant-Name>
coprhd_project = <CoprHD-Project-Name>
coprhd_varray = <CoprHD-Virtual-Array-Name>


[coprhddriver-scaleio]
volume_driver = cinder.volume.drivers.coprhd.scaleio.EMCCoprHDScaleIODriver
volume_backend_name = EMCCoprHDScaleIODriver
coprhd_hostname = <CoprHD Host Name>
coprhd_port = 4443
coprhd_username = <username>
coprhd_password = <password>
coprhd_tenant = <CoprHD-Tenant-Name>
coprhd_project = <CoprHD-Project-Name>
coprhd_varray = <CoprHD-Virtual-Array-Name>
coprhd_scaleio_rest_gateway_host = <ScaleIO Rest Gateway>
coprhd_scaleio_rest_gateway_port = 443
coprhd_scaleio_rest_server_username = <rest gateway username>
coprhd_scaleio_rest_server_password = <rest gateway password>
scaleio_verify_server_certificate = True or False
scaleio_server_certificate_path = <certificate path>

Restart the cinder-volume service.

Volume type creation and extra specs

Setup the volume-types and volume-type to volume-backend association:

$ openstack volume type create "CoprHD High Performance ISCSI"
$ openstack volume type set "CoprHD High Performance ISCSI" --property CoprHD:VPOOL="High Performance ISCSI"
$ openstack volume type set "CoprHD High Performance ISCSI" --property volume_backend_name= EMCCoprHDISCSIDriver

$ openstack volume type create "CoprHD High Performance FC"
$ openstack volume type set "CoprHD High Performance FC" --property CoprHD:VPOOL="High Performance FC"
$ openstack volume type set "CoprHD High Performance FC" --property volume_backend_name= EMCCoprHDFCDriver

$ openstack volume type create "CoprHD performance SIO"
$ openstack volume type set "CoprHD performance SIO" --property CoprHD:VPOOL="Scaled Perf"
$ openstack volume type set "CoprHD performance SIO" --property volume_backend_name= EMCCoprHDScaleIODriver

ISCSI driver notes¶

The compute host must be added to the CoprHD along with its ISCSI initiator.
The ISCSI initiator must be associated with IP network on the CoprHD.

FC driver notes¶

The compute host must be attached to a VSAN or fabric discovered by CoprHD.
There is no need to perform any SAN zoning operations. CoprHD will perform the necessary operations automatically as part of the provisioning process.

ScaleIO driver notes¶

Install the ScaleIO SDC on the compute host.

The compute host must be added as the SDC to the ScaleIO MDS using the below commands:

/opt/emc/scaleio/sdc/bin/drv_cfg --add_mdm --ip List of MDM IPs
(starting with primary MDM and separated by comma)
Example:
/opt/emc/scaleio/sdc/bin/drv_cfg --add_mdm --ip
10.247.78.45,10.247.78.46,10.247.78.47

This step has to be repeated whenever the SDC (compute host in this case) is rebooted.

Consistency group configuration¶

To enable the support of consistency group and consistency group snapshot operations, use a text editor to edit the file /etc/cinder/policy.json and change the values of the below fields as specified. Upon editing the file, restart the c-api service:

"consistencygroup:create" : "",
"consistencygroup:delete": "",
"consistencygroup:get": "",
"consistencygroup:get_all": "",
"consistencygroup:update": "",
"consistencygroup:create_cgsnapshot" : "",
"consistencygroup:delete_cgsnapshot": "",
"consistencygroup:get_cgsnapshot": "",
"consistencygroup:get_all_cgsnapshots": "",

Names of resources in back-end storage¶

All the resources like volume, consistency group, snapshot, and consistency group snapshot will use the display name in OpenStack for naming in the back-end storage.

updated: 2021-10-28 23:18

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