Changing an IP address in a single-engine cluster

This topic describes how to change the IP address of a metadata server in an environment with a single engine in the cluster.

Context

This change requires the server to go offline and be rebooted.
Note: A single-engine cluster is an unsupported environment, see Changing an IP address in a multi-engine cluster for information about changing the IP address in a typical multi-engine cluster.

Steps

  1. Stop the metadata server using the sfscli stopserver administrative CLI command.
  2. Stop the administrative agent using the stopCimom service command.
  3. Drop the server from the cluster using the tank resetcluster service command.
  4. Change the IP address of the engine by performing the following steps:
    1. Edit the /etc/sysconfig/network/ifcfg-ethx configuration file, where x in ethx is the Ethernet port (for example, ifcfg-eth0 if you are using the first Ethernet port), and change the IP address of the machine.
    2. Edit the /usr/tank/server/config/Tank.Config file, and change the “ip=” line to the new IP address of the engine.
    3. Edit the /usr/tank/admin/config/tank.properties file, and change the “IP=” line to the new IP address of the engine.
    4. Run setupstclient.
    5. Verify that the IP address configuration is correct by pinging the interface and using the ifconfig command to inspect the interface properties.
  5. Start the administrative agent using the startCimom command.
  6. Start the master metadata server on the engine using the sfscli startserver command.
  7. Update the SAN File System mount IP address in the client-specific configuration file on the UNIX-based client machines:
    1. Stop and unmount the UNIX-based client using the rmstclient command.
    2. Edit the /usr/tank/client/config/stclient.config file and update the IP address of the metadata server.
    3. For Solaris-clients only, update the IP address for the SAN File System entry in the /etc/vfstab file.
    4. Reboot the client machine.
  8. Update the SAN File System mount IP address in the client-specific configuration file on the Windows® client machines:
    1. Launch the SAN File System Microsoft® Management Console (MMC) snap-in from Start menu by clicking Programs > Administrative Tools > IBM TotalStorage SAN File System client for Windows.
    2. Click Volume Property.
    3. Double-click the SAN File System volume.
    4. Edit the Server IP Address, under the Volume Property, to the new IP address (for example, 20.20.20.10) or fully qualified domain name (for example, mds1.bvr.com).
    5. Click OK.
    6. Reboot the client machine.

Parent topic: Managing metadata servers

Related reference
addserver
dropserver
tank resetcluster
setupstclient
rmstclient
startCimom
stopCimom

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