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Manual Chapter: iWorkflow High Availability
Manual Chapter
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About setting up a high availability cluster

You can ensure that your application management functions are always available by configuring three iWorkflow™ systems in a high availability (HA) configuration. If one device in an HA configuration fails, one of the HA peers takes over application delivery management.

Any configuration changes that occur on one iWorkflow system are immediately synchronized with its peer devices.

Configuring a high availability cluster

You must perform basic system setup and activate a license on all three iWorkflow™ systems before you can configure a high availability cluster.

Configuring iWorkflow™ as part of a high availability (HA) cluster ensures that you do not lose application delivery management capability because one iWorkflow system fails.

Important: You should designate one of the iWorkflow devices in the HA cluster as the lead device. Once you create the cluster, make configuration changes only to that device and let the automatic synching process work.
Important: Do not confuse the iWorkflow HA cluster you create in this process with a BIG-IP device cluster. Although the concept is similar, this process creates a cluster of iWorkflow devices. BIG-IP® HA cluster configuration is a separate process.
Important: To synchronize properly, the iWorkflow systems must be running the same version of software. The exact configuration in terms of virtual hardware is not required; however, the systems should have comparable resources. This is required because, in the event of a fail over, the peer must be able to maintain the process requirements for all systems. This is especially important in terms of disk space and data collection.
Important: The devices that you add as HA peers must be in an unconfigured state. That is, you should complete only the basic setup tasks. Specifying configuration details beyond those covered in the licensing and initial configuration process is likely to complicate the synching process.
Important: You can either operate the iWorkflow system in standalone mode, or as part of a three-peer cluster. Other configurations are not supported at this time.
  1. Log in to iWorkflow™ with the administrator user name and password.
  2. At the top of the screen, click System Settings and then, on the iWorkflow Cluster header, click the + icon.
    The New iWorkflow Cluster Member screen opens.
  3. In the IP Address field, type the address used to access the HA peer.
    If you specified Use Management Address when you configured this device, then use the management IP address. Otherwise, use the device's self IP address.
  4. In the Admin Username and Password fields, type the administrative user name and password for the system.
  5. Click the Add button, and then click OK to add this device to the high availability cluster.
    The system discovers its peer and displays its status.
  6. Repeat steps 2 - 5 to add a third device to the HA cluster.

If discovery of the newly configured iWorkflow system fails, a Delete button displays. Verify the correct self IP address and credentials. Then click the Delete button to remove the incorrect information, and re-type the self IP address, user name, and password.

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