This section contains procedures about maintaining Sun NAS devices that are attached to a cluster. If a device's maintenance procedure might jeopardize the device's availability to the cluster, you must always perform the steps in How to Prepare the Cluster for Sun NAS Device Maintenance before performing the maintenance procedure. After performing the maintenance procedure, perform the steps in How to Restore Cluster Configuration After Sun NAS Device Maintenance to return the cluster to its original configuration.
Follow the instructions in this procedure whenever the Sun NAS device maintenance you are performing might affect the device's availability to the cluster nodes.
This procedure provides the long forms of the Sun Cluster commands. Most commands also have short forms. Except for the forms of the command names, the commands are identical. For a list of the commands and their short forms, see Appendix A, Sun Cluster Object-Oriented Commands, in Sun Cluster 3.1 - 3.2 Hardware Administration Manual for Solaris OS.
To perform this procedure, become superuser or assume a role that provides solaris.cluster.read and solaris.cluster.modify RBAC authorization.
Stop I/O to the Sun NAS device.
On each cluster node, unmount the Sun NAS device directories.
Determine whether a LUN on this Sun NAS device is a quorum device.
If no LUNs on this Sun NAS device are quorum devices, you are finished with this procedure.
If a LUN is a quorum device, perform the following steps:
If your cluster uses other shared storage devices, select and configure another quorum device.
Remove this quorum device.
See Chapter 6, Administering Quorum, in Sun Cluster System Administration Guide for Solaris OS for instructions about adding and removing quorum devices.
If your cluster requires a quorum device (for example, a two-node cluster) and you are maintaining the only shared storage device in the cluster, your cluster is in a vulnerable state throughout the maintenance procedure. Loss of a single node during the procedure causes the other node to panic and your entire cluster becomes unavailable. Limit the amount of time for performing such procedures. To protect your cluster against such vulnerability, add a shared storage device to the cluster.
Follow the instructions in this procedure after performing any Sun NAS device maintenance that might affect the device's availability to the cluster nodes.
Mount the Sun NAS directories.
Determine whether you want an iSCSI LUN on this Sun NAS device to be a quorum device.
If no, continue to How to Prepare the Cluster for Sun NAS Device Maintenance.
If yes, configure the LUN as a quorum device, following the steps in How to Add a Network Appliance Network-Attached Storage (NAS) Quorum Device in Sun Cluster System Administration Guide for Solaris OS.
Remove any extraneous quorum device that you configured in How to Prepare the Cluster for Sun NAS Device Maintenance.
Restore I/O to the Sun NAS device.
This procedure relies on the following assumptions:
Your cluster is operating.
You have prepared the cluster by performing the steps in How to Prepare the Cluster for Sun NAS Device Maintenance.
You have removed any device directories from the cluster by performing the steps in How to Remove a Sun NAS Device From a Cluster.
When you remove the device from cluster configuration, the data on the device is not available to the cluster. Ensure that other shared storage in the cluster can continue to serve the data when the Sun NAS device is removed.
This procedure provides the long forms of the Sun Cluster commands. Most commands also have short forms. Except for the forms of the command names, the commands are identical. For a list of the commands and their short forms, see Appendix A, Sun Cluster Object-Oriented Commands, in Sun Cluster 3.1 - 3.2 Hardware Administration Manual for Solaris OS.
To perform this procedure, become superuser or assume a role that provides solaris.cluster.read and solaris.cluster.modify RBAC authorization.
From any cluster node, remove the device.
If you are using Sun Cluster 3.2, use the following command:
# clnasdevice remove myfiler |
For more information about the clnasdevice command, see the clnasdevice(1CL) man page.
If you are using Sun Cluster 3.1, use the following command:
# scnas -r -h myfiler |
Remove the device from cluster configuration.
Enter the name of the Sun NAS device that you are removing.
Confirm that the device has been removed from the cluster.
The procedure relies on the following assumptions:
Your cluster is operating.
The Sun NAS device is properly configured and the directories the cluster will use have been exported.
See Requirements, Recommendations, and Restrictions for Sun NAS Devices for the details about required device configuration.
You have added the device to the cluster by performing the steps in How to Install a Sun NAS Device in a Cluster.
This procedure provides the long forms of the Sun Cluster commands. Most commands also have short forms. Except for the forms of the command names, the commands are identical. For a list of the commands and their short forms, see Appendix A, Sun Cluster Object-Oriented Commands, in Sun Cluster 3.1 - 3.2 Hardware Administration Manual for Solaris OS.
To perform this procedure, become superuser or assume a role that provides solaris.cluster.read and solaris.cluster.modify RBAC authorization.
Use Sun StorEdge Web Administrator to create the Sun NAS volumes.
“Product Overview” in the Sun StorageTek NAS OS Administration Guide describes the Sun StorEdge Web Administrator graphical user interface (GUI). “Creating File Volumes or Segments” in the Sun StorageTek NAS OS Administration Guide describes how to create file volumes.
Use Sun StorEdge Web Administrator to add read/write access to every cluster node.
You must explicitly grant read/write access to each cluster node. Do not enable general access and do not add access by specifying a cluster host group.
“Setting Up NFS Exports” in the Sun StorageTek NAS OS Administration Guide describes how to add read/write access to nodes in the cluster.
Log into your NAS device and use the Sun StorEdge list command to verify the changes that you made to the approve file, as shown in the following example.
pschost-2# telnet 10.8.165.42 Trying 10.8.165.42... Connected to 10.8.165.42. Escape character is '^]'. connect to (? for list) ? [menu] admin password for admin access ? ******** n1nas20 > approve list ==================== acache: approve ==================== files / @trusted access=rw uid0=0 admin * @schostgroup access=trusted files /vol1 schost1 access=rw files /vol1 schost2 access=rw files /vol2 schost1 access=rw files /vol2 schost2 access=rw ==================== acache: hostgrps ==================== trusted schostgroup n1nas20 > |
From any cluster node, add the directories.
If you are using Sun Cluster 3.2, use the following command:
# clnasdevice add-dir -d /export/dir1,/export/dir2 myfiler |
Enter the directory or directories that you are adding.
Enter the name of the Sun NAS device containing the directories.
For more information about the clnasdevice command, see the clnasdevice(1CL) man page.
If you are using Sun Cluster 3.1, use the following command:
# scnasdir -a -h myfiler -d /vol/DB1 -d /vol/DB2 |
Add the directory or directories to cluster configuration.
Enter the name of the Sun NAS device whose directories you are adding.
Enter the directory to add. Use this option once for each directory you are adding. This value must match the name of one of the directories exported by the Sun NAS device.
Confirm that the directories have been added.
If you do not use the automounter, mount the directories by performing the following steps:
On each node in the cluster, create a mount-point directory for each Sun NAS directory that you added.
# mkdir -p /path-to-mountpoint |
Name of the directory on which to mount the directory
On each node in the cluster, add an entry to the /etc/vfstab file for the mount point.
If you are using your Sun NAS device for Oracle Real Application Clusters database files, set the following mount options:
forcedirectio
noac
proto=tcp
When mounting Sun NAS directories, select the mount options appropriate to your cluster applications. Mount the directories on each node that will access the directories. Sun Cluster places no additional restrictions or requirements on the options that you use.
This procedure assumes that your cluster is operating.
When you remove the device directories, the data on those directories is not available to the cluster. Ensure that other device directories or shared storage in the cluster can continue to serve the data when these directories have been removed.
This procedure provides the long forms of the Sun Cluster commands. Most commands also have short forms. Except for the forms of the command names, the commands are identical. For a list of the commands and their short forms, see Appendix A, Sun Cluster Object-Oriented Commands, in Sun Cluster 3.1 - 3.2 Hardware Administration Manual for Solaris OS.
To perform this procedure, become superuser or assume a role that provides solaris.cluster.read and solaris.cluster.modify RBAC authorization.
If you are using hard mounts rather than the automounter, unmount the Sun NAS directories:
From any cluster node, remove the directories.
For more information about the clnasdevice command, see theclnasdevice(1CL) man page.
If you are using Sun Cluster 3.2, use the following command:
# clnasdevice remove-dir -d /export/dir1 myfiler |
Enter the directory or directories that you are removing.
Enter the name of the Sun NAS device containing the directories.
For more information about the clnasdevice command, see the clnasdevice(1CL) man page.
If you are using Sun Cluster 3.1, use the following command:
# scnasdir -r -h myfiler -d /vol/DB1 -d /vol/DB2 |
Remove the directory or directories from cluster configuration.
Enter the name of the Sun NAS device whose directories you are removing.
Enter the directory to remove. Use this option once for each directory you are removing.
To remove all of this device's directories, specify all for the -d option:
# scnasdir -r -h myfiler -d all |
Confirm that the directories have been removed.
To remove the device, see How to Remove a Sun NAS Device From a Cluster.