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Replace SG6000-CN controller

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You might need to replace the SG6000-CN controller if it is not functioning optimally or if it has failed.

What you'll need

  • You have a replacement controller with the same part number as the controller you are replacing.

  • You have labels to identify each cable that is connected to the controller.

  • You have physically located the controller to replace in the data center.

    Locate controller in data center

About this task

The appliance Storage Node will not be accessible when you replace the SG6000-CN controller. If the SG6000-CN controller is functioning sufficiently, you can perform a controlled shutdown at the start of this procedure.

Note If you are replacing the controller before installing StorageGRID software, you might not be able to access the StorageGRID Appliance Installer immediately after completing this procedure. While you can access the StorageGRID Appliance Installer from other hosts on the same subnet as the appliance, you cannot access it from hosts on other subnets. This condition should resolve itself within 15 minutes (when any ARP cache entries for the original controller time out), or you can clear the condition immediately by purging any old ARP cache entries manually from the local router or gateway.
Steps

  1. Display the current configurations of the appliance and record them.

    1. Log in to the appliance to be replaced:

      1. Enter the following command: ssh admin@grid_node_IP

      2. Enter the password listed in the Passwords.txt file.

      3. Enter the following command to switch to root: su -

      4. Enter the password listed in the Passwords.txt file.

        When you are logged in as root, the prompt changes from $ to #.

    2. Enter: run-host-command ipmitool lan print to display the current BMC configurations for the appliance.

  2. If the SG6000-CN controller is functioning sufficiently to allow for a controlled shutdown, shut down the SG6000-CN controller.

    Shut down SG6000-CN controller

  3. If any of the network interfaces on this StorageGRID appliance are configured for DHCP, you might need to update the permanent DHCP lease assignments on the DHCP servers to reference the MAC addresses of the replacement appliance. The update ensures the appliance is assigned the expected IP addresses.

    1. Locate the MAC address label on the front of the SG6000-CN controller, and determine the MAC address for the Admin Network port.

      Note

      The MAC address label lists the MAC address for the BMC management port.

      To determine the MAC address for the Admin Network port, you must add 2 to the hexadecimal number on the label. For example, if the MAC address on the label ends in 09, the MAC address for the Admin Port would end in 0B. If the MAC address on the label ends in (y)FF, the MAC address for the Admin Port would end in (y+1)01. You can easily make this calculation by opening Calculator in Windows, setting it to Programmer mode, selecting Hex, typing the MAC address, then typing + 2 =.

    2. Ask your network administrator to associate the DNS/network and IP address for the controller you removed with the MAC address for the replacement controller.

      Important You must ensure that all IP addresses for the original controller have been updated before you apply power to the replacement controller. Otherwise, the controller will obtain new DHCP IP addresses when it boots up and might not be able to reconnect to StorageGRID. This step applies to all StorageGRID networks that are attached to the controller.
      Note If the original controller used static IP address, the new controller will automatically adopt the IP addresses of the controller you removed.

  4. Remove and replace the SG6000-CN controller:

    1. Label the cables and then disconnect the cables and any SFP+ or SFP28 transceivers.

      Important To prevent degraded performance, do not twist, fold, pinch, or step on the cables.

    2. Remove the failed controller from the cabinet or rack.

    3. Install the replacement controller into the cabinet or rack.

    4. Replace the cables and any SFP+ or SFP28 transceivers.

    5. Power on the controller and monitor the controller LEDs and boot-up codes.

  5. If the appliance where you replaced the controller used a key management server (KMS) to encrypt data, additional configuration might be required before the node can join the grid. If the node does not automatically join the grid, make sure that these configuration settings have transferred to the new controller and manually configure any settings that don't have the expected configuration:

  6. Log in to the appliance with the replaced controller:

    1. Enter the following command: ssh admin@grid_node_IP

    2. Enter the password listed in the Passwords.txt file.

    3. Enter the following command to switch to root: su -

    4. Enter the password listed in the Passwords.txt file.

  7. Restore BMC network connectivity for the appliance. There are two options:

    • Use static IP, netmask, and gateway

    • Use DHCP to obtain an IP, netmask, and gateway

      1. To restore the BMC configuration to use a static IP, netmask, and gateway, enter the following commands:

        run-host-command ipmitool lan set 1 ipsrc static

        run-host-command ipmitool lan set 1 ipaddr Appliance_IP

        run-host-command ipmitool lan set 1 netmask Netmask_IP

        run-host-command ipmitool lan set 1 defgw ipaddr Default_gateway

      2. To restore the BMC configuration to use DHCP to obtain an IP, netmask, and gateway, enter the following command:

        run-host-command ipmitool lan set 1 ipsrc dhcp

  8. After restoring BMC network connectivity, connect to the BMC interface to audit and restore any additional custom BMC configuration you might have applied. For example, you should confirm the settings for SNMP trap destinations and email notifications. See Configure BMC interface.

  9. Confirm that the appliance node appears in the Grid Manager and that no alerts appear.

Related information

SG6000-CN: Install into cabinet or rack

View status indicators and buttons on SG6000-CN controller

View boot-up codes for SG6000-CN controller