Task 5: Run the discover Command to Discover Hardware Components

Begin this procedure as the root user on the head node.

Start a script to capture command output into a file. This step is optional, but HP recommends doing so.

# script your_filename 

Change to the configuration directory:

# cd /opt/hptc/config/sbin

	NOTE: Follow this procedure before you run the discover command if you want to locate the console port of a non-blade head node on the administration network and not on the external network: Set the IP address for the head node console port to a static IP address that is not currently in use by the HP XC system. Typically, this address can be 172.31.47.240, which is the top end of addresses defined for the HP XC switches defined in the /opt/hptc/config/base_addrV2.ini file. Add the address to the top portion of the /etc/hosts file. The top portion of this file is reserved for user customizations. Add the entry similar to the following: 172.31.47.240 cp-n0

Start the discovery of all network components:

# ./discover --system \
  [--super] \
  [--oldmp] \
  [--outfile file_name] \
  [--ic={AdminNet|Ethernet|Infiniband|Myrinet|Quadrics}] \
  [--verbose]

Table 3-2 and discover(8) contain information about additional keywords you can add to the command line to omit some of the questions that will be asked during the discovery process. Use of these keywords is optional.

If you encounter problems during the discovery process, see “Troubleshooting the Discovery Process” for troubleshooting guidelines.

	NOTE: The discover command does not properly discover HP ProLiant DL140 and DL145 servers until the password is set. Running the discover command now determines the IP address of the console ports so you can use the telnet command to access the console ports and set the password. This process is described in “Modify the Default Password for HP ProLiant DL140 and DL145 Hardware Models”.

Look at the screen and follow along with the command output. Table 3-2 describes each prompt and provides information to help you with your answers.

The output you see will be different. The information you are prompted to supply depends on whether or not you entered additional keywords on the command line.

Example 3-3 discover Command Output On A Small Non-Blade Configuration

Enter the actual total number of nodes in this cluster: 6 Enter the number of nodes that are workstations: 0 Discovering Root switches... Enter the MAC address of the admin root switch in the format xx:xx:xx:xx:xx:xx : your_MAC_address 1 Please enter the ProCurve switch Administrator password: your_password 2 Please re-enter password: your_password Restarting dhcpd Enter the common user name for all console port management devices: your_user_name 3 Please enter the password for your_user_name: your_password Please re-enter password: your_password Discovering 172.20.65.2 port 39 ... Console Port OK Restarting dhcpd discovered_cps is 4 Checking if all console ports are reachable ... number of cps to check, 3 pinging 172.21.0.13 no response from 172.21.0.13 pinging 172.21.0.15 no response from 172.21.0.15 pinging 172.21.0.14 no response from 172.21.0.14 Following console ports did not respond: 172.21.0.13 172.21.0.15 172.21.0.14 number of cps to check, 3 pinging 172.21.0.13 pinging 172.21.0.15 pinging 172.21.0.14 .done Opening /etc/hosts Opening /etc/hosts.new.XC Opening /etc/powerd.conf Building /etc/powerd.conf ... Querying cp-n13 Querying cp-n14 Querying cp-n15 4 done Attempting to start hpls power daemon ... done Waiting for power daemon ... done switchName necs1-1 switchIP 172.20.65.2 type 2650 switchName nems1-1 switchIP 172.20.65.1 type 2848 Attempting to power on nodes with nodestring 8n[13-15] Powering on all known nodes ... done Discovering Nodes... running port_discover on 172.20.65.1 nodes Found = 1 nodes Expected = 4 running port_discover on 172.20.65.1 nodes Found = 1 nodes Expected = 4 running port_discover on 172.20.65.1 nodes Found = 1 nodes Expected = 4 running port_discover on 172.20.65.1 nodes Found = 1 nodes Expected = 4 running port_discover on 172.20.65.1 nodes Found = 3 nodes Expected = 4 running port_discover on 172.20.65.1 nodes Found = 3 nodes Expected = 4 running port_discover on 172.20.65.1 nodes Found = 3 nodes Expected = 4 running port_discover on 172.20.65.1 nodes Found = 3 nodes Expected = 4 running port_discover on 172.20.65.1 nodes Found = 3 nodes Expected = 4 running port_discover on 172.20.65.1 nodes Found = 4 nodes Expected = 4 All nodes initialized. Powering off all nodes but head node ... done Switch 172.20.65.1 port 42 ... Node Found Switch 172.20.65.1 port 41 ... Node Found Switch 172.20.65.1 port 40 ... Node Found Switch 172.20.65.1 port 39 ... Node Found Switch 172.20.65.1 port 38 ... NO Node Found 5 Restarting dhcpd node n14 set to model ProLiant DL145 G1 node n13 set to model ProLiant DL145 G2 node n15 set to model ProLiant DL145 G1 node n16 set to model ProLiant DL585 G1 Opening /etc/hosts Opening /etc/hosts.new.XC Head Node CP device type set to iLO Waiting for power daemon to restart... done

Example 3-4 shows the unique command output for a large-scale system with two regions; all other command output is similar to the previous example.

Example 3-4 discover Command Output For Large-Scale Systems

The discover process has detected 2 regions. Is this correct? [y/n] y switchName nems0-1-0 switchIP 172.20.65.1 type 2848 Enter the actual total number of nodes in region 1: 526 Enter the number of nodes that are workstations: 0 Enter the actual total number of nodes in region 2: 504 Enter the number of nodes that are workstations: 0 discoverSystem called with switch nems1-1-1 and Region Number 1

If the hardware configuration contains HP workstations and you installed SVA, turn on power to the render and display workstations. Then, when prompted, turn off power to the same nodes, leaving the head node power turned on.

If you captured the output of the discover command in a file (described in step 2), press Ctrl-d to end the script session now.

This file is for your information only. Store this file in a directory where you keep administrative data.

Do one of the following:

Go to the enclosure, and obtain the MAC address of the Onboard Administrator. The Onboard Administrator is the small LED panel near the bottom of the enclosure. Write down this MAC address because you will be asked to provide it.

Log in as the root user on the head node.

Start a script to capture command output into a file. This step is optional, but HP recommends doing so.

# script your_filename 

Change to the following directory:

# cd /opt/hptc/config/sbin

Start the discovery process:

# ./discover --enclosurebased --verbose --single

Command output is similar to the following:

Discovery - XC Cluster version HP XC V3.2.1 20071016


Enter the MAC address of the OA for the enclosure
in the format xx:xx:xx:xx:xx:xx : OA_MAC_address


Enter the common user name for all console port management devices: your_user_name
Please enter the password for your_user_name : 
Please re-enter password: 
Restarting dhcpd
waiting for OA to obtain IP address. 
......................................
Enclosure blc4n-enc092UX740006L found
Restarting dhcpd
Opening /etc/hosts 
Opening /etc/hosts.new.XC
uploading database 
 waiting for network component at 172.31.32.1 to become available.
...................
Discovering Blades ... 
Blade found in enclosure blc4n-enc092UX740006L bay 1, name is blc4n1 
Blade found in enclosure blc4n-enc092UX740006L bay 2, name is blc4n2 
Blade found in enclosure blc4n-enc092UX740006L bay 3, name is blc4n3 
Blade found in enclosure blc4n-enc092UX740006L bay 4, name is blc4n4 
Blade found in enclosure blc4n-enc092UX740006L bay 5, name is blc4n5 
Blade found in enclosure blc4n-enc092UX740006L bay 6, name is blc4n6 
Headnode is blc4n1
Setting system name to blc4n1 ... 
Discovering Non-Blade systems ... 
No Virtual Enclosures found ... bypassing non-blade discovery 
uploading database 
Restarting dhcpd
Opening /etc/hosts 
Opening /etc/hosts.new.XC
Opening /etc/powerd.conf
Building /etc/powerd.conf ... done 
Attempting to start hpls power daemon ... done 
Waiting for power daemon ... done


Discovery has found the following components:


0 Switches


0 Virtual Enclosures


1 Real Enclosures with 1 OnBoard Administrators


6 Nodes

If you captured the output of the discover command in a file (described in step 3), press Ctrl-d to end the script session now.

This file is for your information only. Store this file in a directory where you keep administrative data.

Do one of the following:

Begin this procedure as the root user on the head node.

Start a script to capture command output into a file. This step is optional, but HP recommends doing so.

# script your_filename 

Change to the configuration directory:

# cd /opt/hptc/config/sbin

Start the discovery process. When you want to configure future planned compute nodes into the database, the --enclosurebased --maxnodes= options are required on the command line.

The --maxnodes= option specifies the total number of nodes in the hardware configuration, including the number of compute nodes you are planning for future expansion. For example, if the current hardware configuration contains 100 nodes, and you plan to add 96 compute nodes in the future, specify --maxnodes=196.

# ./discover --system --enclosurebased --maxnodes=n

Table 3-4 lists and describes additional discover command-line options that might be appropriate for your discovery process.

Look at the screen and follow along the discover process. The command output shown in Section  is similar to what you will see. The remainder of the discovery process is documented there.

If you need help answering the discover command prompts, Table 3-2 describes each prompt and provides information to assist you with your answers.

Use the method of your choice to view the /etc/dhcpd.conf file and look for the characters cp- in host names to determine console port names.

Use the telnet command and the internal name of the console port to log in to each node's console management device and change the default password. Supply the factory default user name admin and the default password admin to log in:

# telnet cp-node_name
login: admin
password: admin

The interface you use to change the password differs depending upon the BMC firmware version. Thus, do one of the following:

Repeat this procedure to change the console management device password on every HP ProLiant DL140 and DL145 node in the hardware configuration.

Rerun the discover command with the same options.