Rebuilding a BMS

Scenarios

If a BMS cannot work properly due to hardware or SDI card damage, you can rebuild it. This section describes how to rebuild a BMS.

A BMS cannot be rebuilt automatically. You need to contact the operation administrator to rebuild it.

Notes

• Currently, only BMSs that are quickly provisioned can be rebuilt.
• After a BMS is rebuilt, it will start automatically.
• If the BMS uses an IB NIC, record the IP address of the IB NIC rebuilding the BMS.
• If the BMS uses a QinQ network, record the IP address of the QinQ network before rebuilding the BMS.

Constraints

• A BMS can only be rebuilt in the same POD.
• A BMS to be rebuilt must use an EVS disk as its system disk.
• Data on local disks cannot be migrated after a BMS is rebuilt.

Prerequisites

• The BMS to be rebuilt must be stopped.
• The BMS to be rebuilt must have a system disk.

Procedure

1. If your BMS uses a QinQ network, delete configurations of the original QinQ network before rebuilding the BMS. For example, if eth3 and eth5 form port group bond1 for the QinQ network, delete the following configuration files:

   rm /etc/udev/rules.d/80-persistent-net.rules

   rm /etc/sysconfig/network-scripts/ifcfg-eth3

   rm /etc/sysconfig/network-scripts/ifcfg-eth5

   rm /etc/sysconfig/network-scripts/ifcfg-bond1

2. Contact the operation administrator and apply for rebuilding the BMS.
   • If your BMS uses the IB network and the IB NIC IP address assignment mode is DHCP, the IP address of the BMS will change after it is rebuilt. Therefore, if your service heavily depends on the IP address, you need to reconfigure the IP address of the IB network using the static configuration method. The operations describe how to set the IP address of the IB NIC to the original IP address.
     1. Log in to the BMS OS.
     2. Create the /etc/sysconfig/network-scripts/ifcfg-ib0 configuration file. The following uses CentOS as an example. Set IPADDR to the IP address of the BMS before it is rebuilt.

        #/etc/sysconfig/network-scripts/ifcfg-ib0
        DEVICE=ib0
        ONBOOT=yes
        BOOTPROTO=none
        IPADDR=172.31.0.254
        NETWORK=172.31.0.0
        BROADCAST=172.31.0.255
        NETMASK=255.255.255.0

     3. Change the value of enable_ib in the bms-network-config.conf file to False.

        sed -i 's/enable_ib.*/enable_ib = False/g' `find / -name bms-network-config.conf

        Check that the value has been changed.

        cat `find / -name bms-network-config.conf

        Figure 1 Checking the value of enable_ib
        
     4. Save the configuration and exit. Then restart the NIC.

        ifdown ib0

        ifup ib0

     5. Run the following command to check whether the configured IP address takes effect:

        ifconfig ib0