Bright Cluster – HA Setup

  1. Configure failover interface in 1st Head Node
  2. Register license for HA
  3. Prepare HA configuration using command
     $ cmha-setup
  4. Go to Setup menu to prepare configuration
  5. Check Clone Failover for clone instruction
  6. Power-on second head node, let it boot to PXE
  7. Select Rescue in PXE menu
  8. Login as root
  9. Start cloning by calling
     $ /cm/cm-clone-install --failover
  10. The second head node will reboot automatically once completed
  11. Back to primary head node.
  12. In cmha-setup menu, select Finalize.
  13. Verify HA status
     $ cmha status
  14. In cmha-setup menu, configure shared storage.


EGO issue in IBM SCF CE


[root@pcmce-co68 ~]# egosh resource list
Cannot get host info. Not logged on.

Log in to egosh shell (one time only). Default user and password is Admin.

[root@pcmce-co68 ~]# egosh user logon
user account: Admin
Logged on successfully
[root@pcmce-co68 ~]# egosh resource list
NAME status mem swp tmp ut it pg r1m r15s r15m ls
pcmce-c* ok 827M 1516M 69G 7% 258 3.1 0.2 3.3 0.7 1


Disable Serial Console Redirection in xCAT

PXE boot config:

"... console=tty0 console=ttyS0,115200 ..."

Note: serial console redirection is managed by hardware profile.

To check hardware profile:

$ tabdump nodehm

To disable: clear the entries of serialport, serialspeed and serialflow columns

$ chdef -t group -o __HardwareProfile_IBM_Flex_System_x serialport= serialspeed= serialflow=


How to Configure Mellanox Switch

Required Tools:

  1. Serial console cable (provided inside the box)
  2. Converter cable from serial port to USB port (Prolific)

Step-by-step guide using MacOS:

  1. Download and install driver for the converter cable
  2. Check if the driver is installed correctly
     $ kextstat | grep prolific
     159 0 0xffffff7f832fa000 0x6000 0x6000 com.prolific.driver.PL2303 (1.6.0) F6A6805D-685D-3E6D-BF81-106EBBC0A386
     $ ioreg -c IOSerialBSDClient | grep usb
     | | "IOTTYBaseName" = "usbserial"
     | | "IOCalloutDevice" = "/dev/cu.usbserial"
     | | "IODialinDevice" = "/dev/tty.usbserial"
     | | "IOTTYDevice" = "usbserial"
  3. Start the connection
     $ screen /dev/cu.usbserial
  4. Press Enter and follow instructions in official user guide.
    For example:
Mellanox Switch

Mellanox configuration wizard
 Do you want to use the wizard for initial configuration? y
 Step 1: Hostname? [switch-56d680] switch-10g
 Step 2: Use DHCP on mgmt0 interface? [yes] no
 Step 3: Use zeroconf on mgmt0 interface? [no] no
 Step 4: Primary IPv4 address and masklen? []
 Step 5: Default gateway?
 Step 6: Primary DNS server?,
 % Value must be an IPv4 address in the format of ''.
 Step 6: Primary DNS server?
 Step 7: Domain name?
 Step 8: Enable IPv6? [yes] yes
 Step 9: Enable IPv6 autoconfig (SLAAC) on mgmt0 interface? [no] no
 Step 10: Enable DHCPv6 on mgmt0 interface? [no] no
 Step 11: Admin password (Enter to leave unchanged)?
 Step 11: Confirm admin password?
 You have entered the following information:
 1. Hostname: switch-10g
 2. Use DHCP on mgmt0 interface: no
 3. Use zeroconf on mgmt0 interface: no
 4. Primary IPv4 address and masklen:
 5. Default gateway:
 6. Primary DNS server:
 7. Domain name:
 8. Enable IPv6: yes
 9. Enable IPv6 autoconfig (SLAAC) on mgmt0 interface: no
 10. Enable DHCPv6 on mgmt0 interface: no
 11. Admin password (Enter to leave unchanged): (CHANGED)
 To change an answer, enter the step number to return to.
 Otherwise hit to save changes and exit.