You can create BCC load and unload scripts for each BCC-enabled resource in each peer cluster. You can add commands that are specific to your storage hardware. These scripts and commands might be needed to promote mirrored LUNs to primary on the cluster where the pool resource is being migrated to, or demote mirrored LUNs to secondary on the cluster where the pool resource is being migrated from.
You can also add commands and Perl scripts to resource scripts to call other scripts. Any command that can be run at the Linux terminal console can be used. The scripts or commands you add are stored in eDirectory. If you add commands to call outside scripts, those scripts must exist in the file system in the same location on every server in the cluster.
IMPORTANT:Scripts are not synchronized by Identity Manager.
Consider the following guidelines when creating and using scripts:
Scripts must be written in Perl or have a Perl wrapper around them.
Log files can be written to any location, but the BCC cluster resource information is logged to SYSLOG (/var/log/messages).
Error codes can be used and written to a control file so that you know why your script failed.
BCC checks only whether the script was successful. If an error is returned from the script, the resource does not load and remains in the offline state.
The BCC scripts are run from the MasterIP resource node in the cluster.
Perl script code that you customize for your SAN can be added to a BCC-enabled cluster resource load script and unload script through the BCC management interface.
You can include parameters that are passed to each Perl script. BCC passes the parameters in the format of %parm1%, %parm2%, and so on.
There can be multiple scripts per resource but you need to use a common file to pass information from one script to another.
The BCC load script and unload script for a BCC-enabled cluster resource must be unique on each cluster node.
Scripts written for a SAN that mirrors data between two clusters should demote/mask a LUN (or group of LUNs) for a running resource on its current cluster, swap the synchronization direction, then promote/unmask the LUN(s) for the resource on the other cluster.
To add storage management configuration information:
Start your Internet browser and enter the URL for iManager.
The URL is http://server_ip_address/nps/iManager.html. Replace server_ip_address with the IP address or DNS name of the server that has iManager and the Identity Manager preconfigured templates for iManager installed.
Specify your username and password, specify the tree where you want to log in, then click .
In , click , then click the link.
Specify a cluster name, or browse and select one.
Under , select a cluster resource that is enabled for business continuity, then click .
Cluster resources that are enabled for business continuity have the BCC label on the resource type icon.
Click the tab, then click .
Create BCC storage management load and unload scripts:
Under , click to bring up a page that lets you create a script to promote mirrored LUNs on a cluster.
You can also delete a script, edit a script by clicking , or change the order in which load scripts execute by clicking the and links.
Specify values for the following parameters on the Storage Management Script Details page:
|
Parameter |
Description |
|---|---|
|
Name |
Specify a name for the script you are creating. |
|
Description |
If desired, specify a description of the script you are creating. |
|
CIMOM IP or DNS |
If you selected the check box on the previous page and you are not using a template, specify the IP address or DNS name for your storage system. This is the IP address or DNS name that is used for storage management. |
|
Namespace |
If you selected the check box on the previous page, accept the default namespace, or specify a different namespace for your storage system. Namespace determines which models and classes are used with your storage system. Consult the vendor documentation to determine which namespace is required for your storage system. |
|
Username and password |
If you selected the check box on the previous page, accept the default namespace, or specify a different namespace for your storage system. |
|
Port |
If you selected the check box on the previous page, accept the default port number or specify a different port number. This is the port number that CIMOM (your storage system manager) uses. Consult your storage system documentation to determine which port number you should use. |
|
Secure |
If you selected the check box on the previous page, select the check box if you want storage management communication to be secure (HTTPS). Deselect the check box to use non-secure communications (HTTP) for storage management communications. |
|
Script parameters |
If desired, specify variables and values for the variables that are used in the storage management script. To specify a variable, click , then provide the variable name and value in the fields provided. Click to save your entries. You can specify additional variables by clicking again and providing variable names and values. You can also edit and delete existing script parameters by clicking the applicable link. |
|
Script parameters text box |
Use this text box to add script commands to the script you are creating. These script commands are specific to your storage hardware. You can add a Perl script, or any commands that can be run on Linux. IMPORTANT:If you add commands to call outside scripts, those scripts must exist with the same name and path on every server in the cluster. |
|
CIM enabled |
Select this check box if your storage system supports SMI-S and you did not select the check box on the previous page. This causes the CIM-specific fields to become active on this page. |
|
Synchronous |
Select this check box to run scripts sequentially (that is, one at a time). Deselect this check box to allow multiple scripts to run concurrently. Most storage system vendors do not support running multiple scripts concurrently. |
|
Edit flags |
This is an advanced feature, and should not be used except under the direction of Novell Support. |
Click and on the Script Details page, then click on the Resource Properties page to save your script changes.
IMPORTANT:After clicking and on the Script Details page, you are returned to the Resource Properties page (with the tab selected). If you do not click on the Resource Properties page, your script changes are not saved.
IMPORTANT:The CIMOM daemons on all nodes in the business continuity cluster should be configured to bind to all IP addresses on the server. For information, see Section 10.5, Configuring CIMOM Daemons to Bind to IP Addresses.