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Follow this procedure to use the cluster_config utility to view the default system configuration and modify default
role assignments and assign additional roles to nodes where necessary.
This task is especially important if you are configuring services
for improved availability. When the following command-line
menu options are displayed, enter the letter h or the word help to display a description
of each menu option. Entries are not case sensitive. [L]ist Nodes, [M]odify Nodes, [A]nalyze, [H]elp, [P]roceed, [Q]uit: h
Valid commands are:
L - Lists discovered nodes with current location, assigned roles,
and external network connections
M - Modifies nodes with the Modify Node submenu
A - Analyze current configuration
H - Displays this help message
P - Proceeds to the next cluster configuration step
Q - Quits this utility leaving the cluster unmodified
[L]ist Nodes, [M]odify Nodes, [C]heck, [H]elp, [P]roceed, [Q]uit: |
Enter the letter l to list the default configuration; then enter the letter b or the letter a to view an abbreviated
or full version of the output: [L]ist Nodes, [M]odify Nodes, [A]nalyze, [H]elp, [P]roceed, [Q]uit: l
Output Type - a[B]breviated, [A]ll, [C]ancel: |
The a[B]breviated output is similar to the following. Nodes with the same role assignments
are condensed into one line item. Node: n16 location: Level 1 Switch 172.20.65.1, Port 42
CURRENT HEAD NODE
Roles assigned: compute console_network disk_io external
management_hub management_server resource_management
External Ethernet name: penguin.southpole.com
ipaddr: 192.0.2.0 netmask: 255.255.252.0 gateway: 192.0.2.51
The following nodes are configured with the common role "compute":
n[11-15]
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Do the following to determine
whether you have to modify the default role assignments: See Appendix F for a description
of the default role assignments based on system size. Read about the special considerations regarding the
default role assignments to determine if the role assignments are
suitable for your environment. If you do not modify the role assignments,
the system will be configured with the default assignments. If you are configuring services
for improved availability, read the information in Table 1-2 to ensure that you assign the appropriate roles to the nodes in
availability sets so that service failover can occur. If you plan to configure an
external Ethernet connection on any node, you must assign the external role to that node. By default,
the head node is assigned with the console_network and management_hub roles. You have the flexibility
to assign the console_network and management_hub roles to multiple nodes and HP recommends that you consider using
one management hub for every 64 to 128 nodes. However, on systems with more than 256 nodes, HP recommends that
you remove the console_network and management_hub roles from the head node so that the management hub activity does
not interfere with the services that only run on the head node.
Use the Modify Nodes and Analyze options on the cluster_config command-line menu to adjust the role assignments and create an external
Ethernet connection on any node, if required. If you installed remote graphics software (such as HP RGS or Virtual
GL), you must configure the external Ethernet devices (the external
NICs) on the SVA nodes. See Appendix G for information about how to use the menu
options, how to assign node roles, and how to configure external Ethernet
connections on a node. When you are satisfied
with the role assignments and external Ethernet configuration, enter
the letter p to apply the configuration to
the system: [L]ist Nodes, [M]odify Nodes, [A]nalyze, [H]elp, [P]roceed, [Q]uit: p
Do you want to apply your changes to the cluster configuration? [y/n] y |
Do one of the following when
this prompt appears: [S]ervices Config, [P]roceed, [Q]uit: |
Enter the letter s to perform customized services configuration. This
option is intended for experienced XC administrators who want to customize
role services. Intervention like this is typically not required for HP XC systems.
HP recommends that you enter p to continue
with the system configuration process and proceed to “Task 10: Respond to Configuration Questions”. Enter the letter p to continue with the system configuration process. When the system configuration process begins,
the configuration and management database is not consistent and complete
again until after cluster_config processing is
complete. Therefore, do not press Ctrl-c during this time. Enter the letter q to exit from the system configuration process. The
following prompt appears to give you the option to save your responses
to the configuration and management database: Do you want to apply your changes to the cluster configuration? [y/n] y |
Proceed to “Task 10: Respond to Configuration Questions” to respond to the remainder of the system configuration questions. |
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