In addition to the requirements described Section 3.0, Planning Your Dynamic Storage Technology Server Environment, use the requirements in this section to configure DST on nodes in a OES Cluster Services cluster.
Ensure that each node in the cluster is running the same release version of OES.
When you use clustered DST volumes, special steps are needed when you upgrade the cluster from OES 2 SP3 to OES 2015 or later. For information, see Section 16.11, Upgrading a Cluster with DST Resources from OES 2 SP3 to OES 2015 or Later.
The NCP (NetWare Core Protocol) Server and the Dynamic Storage Technology software are not cluster aware. They must be installed on every node in the cluster where you plan to migrate or fail over the cluster resource that contains shadow volumes. You do not cluster NCP Server or DST services. You can cluster the DST shadow volume pair by creating a DST pool cluster resource that manages the primary and secondary disks, pools, and volumes.
Dynamic Storage Technology supports shadow volumes created with pairs of shared OES Storage Services (NSS) volumes. Install NSS on each node in the cluster. For information, see the Storage Services File System (NSS) Administration Guide for Linux.
You must create the two NSS pools and volumes on separate shared disks before you create the shadow volume relationship for the two volumes. The primary pool must be cluster-enabled. The secondary pool must be shared. You can alternatively cluster-enable the secondary pool, but its Cluster objects and IP address are not used by the secondary cluster resource while the two NSS volumes are in the shadow relationship.
You do not use the Dynamic Storage Technology Options page in OES Remote Manager to create a clustered DST shadow volume pair. The ncpcon mount command in the load script creates the DST shadow volume pair on the node where the resource is brought online.
When you use OES Remote Manager for Linux to manage policies for the shadow volume, you typically connect to the IP address of the DST pair cluster resource. You can also connect to the IP address of the server node where the cluster resource is currently mounted.
NCP Server allows NCP users to access a merged view of the clustered DST volume pair when the cluster resource is online. As with any clustered volume, the files are not available when the cluster resource is offline.
OES CIFS supports the Dynamic Storage Technology merged view of DST volume pairs composed of two NSS volumes. eDirectory and Active Directory users can access a merged view of the clustered DST volume pair when the cluster resource is online. As with any clustered volume, the files are not available when the cluster resource is offline. OES CIFS does not require users to be Linux enabled with Linux User Management (LUM).
You must install and configure OES CIFS on every node in the cluster where you plan to give users CIFS access to the shared cluster resource. For information, see OES CIFS for Linux Administration Guide.
You want OES CIFS to be available on the node where the DST shadow volumes is active. To do this, you add OES CIFS as an advertising protocol for the primary NSS pool resource as you cluster-enable it. You do not enable OES CIFS shares for the secondary NSS volume, because users access data via the merged view and do not directly access data on the secondary volume.
In the primary NSS pool cluster resource load script, the following command binds OES CIFS to provide access to the shared resource through the virtual server IP address when the resource is mounted on a node.
exit_on_error novcifs --add --vserver=virtualserverFDN --ip-addr=virtualserverip
In the primary NSS pool cluster resource unload script, the following command unbinds OES CIFS from the DST pool cluster resource when the resource is failed over or cluster migrated to another node in the cluster.
ignore_error novcifs --remove --vserver=virtualserverFDN --ip-addr=virtualserverip
In the primary NSS pool cluster resource monitor script, the CIFS monitor command helps to keep CIFS up and running.
exit_on_error rcnovell-cifs monitor
In addition, the following CIFS attributes are automatically added to the NCS:NCP Server object for the virtual server on the primary pool cluster resource:
nfapCIFSServerName (read access)
nfapCIFSAttach (read access)
nfapCIFSComment (read access)
nfapCIFSShares (write access)
For information, see Configuring CIFS with Cluster Services for an NSS File System
in the OES CIFS for Linux Administration Guide.