rmrsrc Command

Purpose

Removes a defined resource.

Syntax

To display the names and datatypes of the command arguments:

rmrsrc -l [-h] resource_class

Description

The rmrsrc command removes — or "undefines" — the specified resource instance (or instances). The rmrsrc command makes a request to the resource monitoring and control (RMC) subsystem to undefine a specific resource instance. The resource manager of the resource removes the resource.

The first format of this command requires a resource class name parameter and a selection string specified using the -s flag. All resources in the specified resource class that match the specified selection string are removed. If the selection string identifies more than one resource to be removed, it is the same as running this command once for each resource that matches the selection string.

The second format of this command allows the actual resource handle linked with a specific resource to be specified as the parameter. It is expected that this form of the command would be more likely used from within a script.

Instead of specifying multiple node names in selection_string, you can use the -N node_file flag to indicate that the node names are in a file. Use -N "-" to read the node names from standard input.

If Cluster Systems Management (CSM) is installed on your system, you can use CSM defined node groups as node name values to refer to more than one node. For information about working with CSM node groups and using the CSM nodegrp command, see the CSM: Administration Guide and the CSM: Command and Technical Reference.

Flags

-a

Specifies that this command applies to all nodes in the cluster. The cluster scope is determined by the CT_MANAGEMENT_SCOPE environment variable. If it is not set, first the management domain scope is chosen if it exists, then the peer domain scope is chosen if it exists, and then local scope is chosen, until the scope is valid for the command. The command will run once for the first valid scope found. For example, if both a management and peer domain exist, rmrsrc -a with CT_MANAGEMENT_SCOPE not set will apply to the management domain. In this case, to apply to the peer domain, set CT_MANAGEMENT_SCOPE to 2.

-f resource_data_input_file

Specifies the name of the file that contains resource argument information.

-l

Lists the command arguments and datatypes. Some resource managers accept additional arguments that are passed to the remove request. Use this flag to list any defined command arguments and the datatypes of the command argument values.

-N { node_file │ "-" }

Specifies that node names are read from a file or from standard input. Use -N node_file to indicate that the node names are in a file.

• There is one node name per line in node_file
• A number sign (#) in column 1 indicates that the line is a comment
• Any blank characters to the left of a node name are ignored
• Any characters to the right of a node name are ignored

Use -N "-" to read the node names from standard input.

The CT_MANAGEMENT_SCOPE environment variable determines the scope of the cluster. If CT_MANAGEMENT_SCOPE is not set, management domain scope is chosen first (if a management domain exists), peer domain scope is chosen next (if a peer domain exists), and then local scope is chosen, until the scope is valid for the command. The command runs once for the first valid scope it finds. For example, if a management domain and a peer domain both exist and CT_MANAGEMENT_SCOPE is not set, this command applies to the management domain. If you want this command to apply to the peer domain, set CT_MANAGEMENT_SCOPE to 2.

-r "resource_handle"

Specifies a resource handle. The resource handle must be specified using the format: "0xnnnn 0xnnnn 0xnnnnnnnn 0xnnnnnnnn 0xnnnnnnnn 0xnnnnnnnn", where n is any valid hexadecimal digit. The resource handle uniquely identifies a particular resource instance that should be removed.

-s "selection_string"

Specifies a selection string. All selection strings must be enclosed within either double or single quotation marks. If the selection string contains double quotation marks, enclose the entire selection string in single quotation marks. For example:

-s 'Name == "testing"'

-s 'Name ?= "test"'

Only persistent attributes can be listed in a selection string. For information on how to specify selection strings, see the RSCT: Administration Guide .

-h

Writes the command's usage statement to standard output.

-T

Writes the command's trace messages to standard error. For your software service organization's use only.

-V

Writes the command's verbose messages to standard output.

Parameters

resource_class

Specifies the resource class name. The resource instances for this resource class that match the selection string criteria are removed.

Security

The user needs write permission for the resource_class specified in rmrsrc to run rmrsrc. Permissions are specified in the access control list (ACL) file on the contacted system. See the RSCT: Administration Guide for information about the ACL file and how to modify it.

Exit Status

Environment Variables

CT_CONTACT

When the CT_CONTACT environment variable is set to a host name or IP address, the command contacts the Resource Monitoring and Control (RMC) daemon on the specified host. If the environment variable is not set, the command contacts the RMC daemon on the local system where the command is being run. The resource class or resources that are displayed or modified by the command are located on the system to which the connection is established.

CT_IP_AUTHENT

When the CT_IP_AUTHENT environment variable exists, the RMC daemon uses IP-based network authentication to contact the RMC daemon on the system that is specified by the IP address to which the CT_CONTACT environment variable is set. CT_IP_AUTHENT only has meaning if CT_CONTACT is set to an IP address; it does not rely on the domain name system (DNS) service.

CT_MANAGEMENT_SCOPE

Determines the management scope that is used for the session with the RMC daemon to monitor and control the resources and resource classes. The management scope determines the set of possible target nodes where the resources and resource classes can be monitored and controlled. The valid values are:

0

Specifies local scope.

1

Specifies local scope.

2

Specifies peer domain scope.

3

Specifies management domain scope.

If this environment variable is not set, local scope is used.

Implementation Specifics

This command is part of the Reliable Scalable Cluster Technology (RSCT) fileset for AIX®.

Standard Output

When the -h flag is specified, this command's usage statement is written to standard output.

The command output and all verbose messages are written to standard output.

Standard Error

All trace messages are written to standard error.

Examples

Location

/opt/rsct/bin/rmrsrc