Chapter 2 Sun Cluster and RBAC

This chapter describes role-based access control (RBAC) in relation to Sun Cluster. Topics covered include:

• Setting Up and Using RBAC With Sun Cluster

• Sun Cluster RBAC Rights Profiles

• Creating and Assigning an RBAC Role With a Sun Cluster Management Rights Profile

• Modifying a User's RBAC Properties

Setting Up and Using RBAC With Sun Cluster

Use the following table to determine the documentation to consult about setting up and using RBAC. Specific steps that you follow to set up and use RBAC with Sun Cluster are provided later in this chapter.

Sun Cluster RBAC Rights Profiles

Sun Cluster Manager and selected Sun Cluster commands and options that you issue at the command line use RBAC for authorization. Sun Cluster commands and options that require RBAC authorization will require one or more of the following authorization levels. Sun Cluster RBAC rights profiles apply to both global and non-global zones.

solaris.cluster.read

Authorization for list, show, and other read operations.

solaris.cluster.admin

Authorization to change the state of a cluster object.

solaris.cluster.modify

Authorization to change properties of a cluster object.

For more information on the RBAC authorization required by a Sun Cluster command, see the command man page.

RBAC rights profiles include one or more RBAC authorizations. You can assign these rights profiles to users or to roles to give them different levels of access to Sun Cluster. Sun provides the following rights profiles with Sun Cluster software.

The RBAC rights profiles listed in the following table continue to support the old RBAC authorizations as defined in previous Sun Cluster releases.

Creating and Assigning an RBAC Role With a Sun Cluster Management Rights Profile

Use this task to create a new RBAC role with a Sun Cluster Management Rights Profile and to assign users to this new role.

How to Create a Role by Using the Administrative Roles Tool

Before You Begin

To create a role, you must either assume a role that has the Primary Administrator rights profile assigned to it or run as root user.

1. Start the Administrative Roles tool.

   To run the Administrative Roles tool, start the Solaris Management Console, as described in How to Assume a Role in the Solaris Management Console in System Administration Guide: Security Services. Then, open the User Tool Collection, and click the Administrative Roles icon.

2. Start the Add Administrative Role wizard.

   Select Add Administrative Role from the Action menu to start the Add Administrative Role wizard for configuring roles.

3. Set up a role to which the Cluster Management rights profile is assigned.

   Use the Next and Back buttons to navigate between dialog boxes. Note that the Next button does not become active until you have filled in all required fields. The last dialog box enables you to review the entered data, at which point you can use the Back button to change entries or click Finish to save the new role. The following list summarizes the dialog box fields and buttons.

   Role Name

   Short name of the role.

   Full Name

   Long version of the name.

   Description

   Description of the role.

   Role ID Number

   UID for the role, automatically incremented.

   Role Shell

   The profile shells that are available to roles: Administrator's C, Administrator's Bourne, or Administrator's Korn shell.

   Create a role mailing list

   Makes a mailing list for users who are assigned to this role.

   Available Rights / Granted Rights

   Assigns or removes a role's rights profiles.

   Note that the system does not prevent you from typing multiple occurrences of the same command. The attributes that are assigned to the first occurrence of a command in a rights profile have precedence and all subsequent occurrences are ignored. Use the Up and Down arrows to change the order.

   Server

   Server for the home directory.

   Path

   Home directory path.

   Add

   Adds users who can assume this role. Must be in the same scope.

   Delete

   Deletes users who are assigned to this role.

   ---

   Note –

   You need to place this profile first in the list of profiles that are assigned to the role.

   ---

4. Add users who need to use the Sun Cluster Manager features or Sun Cluster commands to the newly created role.

   You use the useradd(1M) command to add a user account to the system. The -P option assigns a role to a user's account.

5. Click Finish when you have added the users.

6. Open a terminal window and become root.

7. Start and stop the name service cache daemon.

   The new role does not take effect until the name service cache daemon is restarted. After becoming root, type the following text:

   # /etc/init.d/nscd stop # /etc/init.d/nscd start

How to Create a Role From the Command Line

1. Become superuser or assume a role that provides solaris.cluster.admin RBAC authorization.

2. Select a method for creating a role:

   • For roles in the local scope, use the roleadd(1M) command to specify a new local role and its attributes.

   • Alternatively, for roles in the local scope, edit the user_attr(4) file to add a user with type=role.

     Use this method for emergencies only, as it is easy to make mistakes while you are typing.

   • For roles in a name service, use the smrole(1M) command to specify the new role and its attributes.

     This command requires authentication by superuser or a role that is capable of creating other roles. You can apply the smrole to all name services. This command runs as a client of the Solaris Management Console server.

3. Start and stop the name service cache daemon.

   New roles do not take effect until the name service cache daemon is restarted. As root, enter the following text:

   # /etc/init.d/nscd stop # /etc/init.d/nscd start

Example 2–1 Creating a Custom Operator Role by Using the smrole Command

The following sequence demonstrates how a role is created with the smrole command. In this example, a new version of the Operator role is created that has assigned to it the standard Operator rights profile and the Media Restore rights profile.

% su primaryadmin 
# /usr/sadm/bin/smrole add -H myHost -- -c "Custom Operator" -n oper2 -a johnDoe \
-d /export/home/oper2 -F "Backup/Restore Operator" -p "Operator" -p "Media Restore"

Authenticating as user: primaryadmin

Type /? for help, pressing <enter> accepts the default denoted by [ ]
Please enter a string value for: password :: <type primaryadmin password>

Loading Tool: com.sun.admin.usermgr.cli.role.UserMgrRoleCli from myHost
Login to myHost as user primaryadmin was successful.
Download of com.sun.admin.usermgr.cli.role.UserMgrRoleCli from myHost was successful.

Type /? for help, pressing <enter> accepts the default denoted by [ ]
Please enter a string value for: password ::<type oper2 password>

# /etc/init.d/nscd stop
# /etc/init.d/nscd start

To view the newly created role (and any other roles), use smrole with the list option, as follows:

# /usr/sadm/bin/smrole list --
Authenticating as user: primaryadmin

Type /? for help, pressing <enter> accepts the default denoted by [ ]
Please enter a string value for: password :: <type  primaryadmin password>

Loading Tool: com.sun.admin.usermgr.cli.role.UserMgrRoleCli from myHost
Login to myHost as user primaryadmin was successful.
Download of com.sun.admin.usermgr.cli.role.UserMgrRoleCli from myHost was successful.
root                    0               Super-User
primaryadmin            100             Most powerful role
sysadmin                101             Performs non-security admin tasks
oper2                   102             Custom Operator

Modifying a User's RBAC Properties

You can modify a user's RBAC properties by using either the user accounts tool or the command line. To modify a user's RBAC properties, choose one of the following procedures.

• How to Modify a User's RBAC Properties by Using the User Accounts Tool

• How to Modify a User's RBAC Properties From the Command Line

How to Modify a User's RBAC Properties by Using the User Accounts Tool

Before You Begin

To modify a user's properties, you must either be running the User Tool Collection as root user or assume a role that has the primary administrator rights profile assigned to it.

1. Start the User Accounts tool.

   To run the user accounts tool, you need to start the Solaris Management Console, as described in How to Assume a Role in the Solaris Management Console in System Administration Guide: Security Services. Then, open the User Tool Collection, and click the user accounts icon.

   After the user accounts tool starts, the icons for the existing user accounts are displayed in the view pane.

2. Click the user account icon to be changed and select Properties from the Action menu (or simply double-click the user account icon).

3. Click the appropriate tab in the dialog box for the property to be changed, as follows:

   • To change the roles that are assigned to the user, click the Roles tab and move the role assignment to be changed to the appropriate column: Available Roles or Assigned Roles.

   • To change the rights profiles that are assigned to the user, click the Rights tab and move it to the appropriate column: Available Rights or Assigned Rights.

     ---

     Note –

     Avoid assigning rights profiles directly to users. The preferred approach is to require users to assume roles in order to perform privileged applications. This strategy discourages users from abusing privileges.

     ---

How to Modify a User's RBAC Properties From the Command Line

1. Become superuser or assume a role that provides solaris.cluster.modify RBAC authorization.

2. Choose the appropriate command:

   • To change the authorizations, roles, or rights profiles that are assigned to a user who is defined in the local scope, use the usermod(1M) command.

   • Alternatively, to change the authorizations, roles, or rights profiles that are assigned to a user who is defined in the local scope, edit the user_attr file.

     Use this method for emergencies only, as it is easy to make a mistake while you are typing.

   • To change the authorizations, roles, or rights profiles that are assigned to a user who is defined in a name service, use the smuser(1M) command.

     This command requires authentication as superuser or as a role that is capable of changing user files. You can apply smuser to all name services. smuser runs as a client of the Solaris Management Console server.