Dell PowerFlex integration for OpenStack Block Storage

Dell PowerFlex Storage Backend for Cinder

Overview

This charm provides a Dell PowerFlex storage backend for use with the Cinder charm.

Configuration

This section covers common and/or important configuration options. See file config.yaml for the full list of options, along with their descriptions and default values. See the Juju documentation for details on configuring applications.

powerflexgw-ip

The PowerFlex Gateway IP or hostname.

powerflexgw-login

The username used to access the PowerFlex Gateway

powerflexgw-password

The password used to authenticate to the PowerFlex Gateway

powerflex-max-over-subscription-ratio

Speciifies the maximum oversubscription ratio allowed by the system. If it's not specified, the value of 10.0 will be set.

powerflex-thin-provision

Specifies the provisioning type used when the user asks for a volume. Can be either thick or thin(default).

powerflex-storage-pools

A comma-separated list of storage pool names to use. Each storage pool must be set under the form of ProtectionDomain:StoragePool.

powerflex-allow-migration-during-rebuild

Allows or prevents volume migration during rebuild process. Disabled by default.

powerflex-allow-non-padded-volumes

Allows volumes to be created in a storage pool when zero padding feature is disabled. Disabled by default.

powerflex-rest-server-port

TCP port used to communicate with the PowerFlex Gateway. 443 by default.

powerflex-round-volume-capacity

Allows or prevents the size of a volume to be an increment of 8GB. Enabled by default.

powerflex-rest-api-connect-timeout

Connection timeout value (in seconds) for REST API calls to the PowerFlex Gateway. If not specified, the value of 30s will be set.

powerflex-rest-api-read-timeout

Read timeout value (in seconds) for REST API calls to the PowerFlex Gateway. If not specified, the value of 30s will be set.

powerflex-replication-config

Specifies the settings for enabling the replication. Only one replication is supported for each backend.

powerflex-sdc-mdm-ips

Specifies a comma-separated list of MDM IPs. Can be used to defined a VIP also. This is required during the SDC configuration.

Deployment

This charm's primary use is as a backend for the cinder charm. To do so, add a relation between both charms:

juju deploy --config cinder-powerflex-config.yaml --resource sdc-deb-package=../EMC-ScaleIO-sdc-4.5-2.185.Ubuntu.22.04.x86_64.deb cinder-powerflex
juju integrate cinder-powerflex:storage-backend cinder:storage-backend

Depending on the kernel version that your system runs on, you may have to install the proper SDC kernel module. An alternative method which triggers an on-demand compilation process can be used if your SDC is 3.6.3 and higher or 4.5.2 and higher. You can refer to the documentation here:

• On-demand compilation of the PowerFlex SDC driver

This charm doesn't include yet the enablement of the on-demand compilation. In case the scini service can't start and your SDC is at version mentioned above, you can enable the feature by creating an empty file on every nodes which runs the SDC driver.

sudo touch /etc/emc/scaleio/scini_sync/.build_scini
sudo service scini restart

Documentation

The OpenStack Charms project maintains two documentation guides:

• OpenStack Charm Guide: for project information, including development and support notes
• OpenStack Charms Deployment Guide: for charm usage information

Bugs

Please report bugs on Launchpad.