Enabling cluster membership of Eclipse Amlen servers in a high availability pair

You can enable cluster membership of Eclipse Amlen servers in a high availability (HA) pair by using the Amlen WebUI.

System administrators can enable cluster membership of Eclipse Amlen servers in an HA pair by using the Amlen WebUI, or by using REST Administration APIs. For more information about using REST Administration APIs to enable cluster membership of servers in an HA pair, see Enabling cluster membership of Eclipse Amlen servers in a high availability pair by using REST Administration APIs.

In this scenario, Server A is the primary node and Server B is the standby node in the HA pair.

  1. Optional: Eclipse Amlen supports user provided TLS credentials for Clustering. Providing the credentials prior to adding a server to a cluster is recommended to avoid migrating the cluster. See Clustering: User Provided TLS Credentials.
  2. Configure cluster membership values that relate to addresses and ports on Server B. Do not enable cluster membership on Server B.
    1. Ensure that you are managing Server B. In the Cluster menu, select Join/Leave
    2. Click Edit in the Configuration panel.
    3. Specify the cluster configuration:
      1. Type the control address of Server B into the Control Address field.
      2. Ensure that the other cluster membership configuration parameters that are necessary for Server A and B to identify and connect to the other members of the cluster are set, for example, if Server A is using external addresses or ports. For more information about the parameters that you can set to configure cluster membership on a server, see Configuring the cluster membership of an Eclipse Amlen server.
    4. Click Save
    Note:

    You cannot update the values for the following fields on a Standby server:

    • Cluster Name
    • Cluster Membership
    • Discovery Server List
  3. Configure and enable cluster membership on Server A.
    1. Ensure that you are managing Server A. In the Cluster menu, select Join/Leave
    2. Click Edit in the Configuration panel.
    3. Specify the cluster configuration:
      1. Type the name of the cluster that Server A is to join in the Cluster Name field. This must be the same name as the name of the cluster that you specified for Server B to join.
      2. Type the control address of Server A into the Control Address field.
      3. Ensure that the other cluster membership configuration parameters that are necessary for Server A and B to identify and connect to the other members of the cluster are set, for example, if Server B is using external addresses or ports. For more information about the parameters that you can set to configure cluster membership on a server, see Configuring the cluster membership of an Eclipse Amlen server.
    4. Select the Enabled check box.
    5. Click Save
    6. Click Restart later
  4. Restart both servers.
    Restart Server B first.
    1. Ensure that you are managing Server B. In the Server menu, select Server Control
    2. Click Restart the server, and then click Restart
    3. Switch to managing Server A. In the Server menu, select Server Control
    4. Click Restart the server, and then click Restart
  5. After your servers have restarted, verify the status of your servers.
    If either server is in maintenance mode, repeat step 4.
    1. On Server A, check the Status drop-down list and verify that the status displays the values High Availability: Primary node and Cluster: Active
    2. In the Cluster menu, click Status
    3. In the Cluster Status Data pane, ensure that the other members of the cluster are visible in the table.
    4. On Server B, check the Status drop-down list and verify that the status displays the values High Availability: Standby node and Cluster: Standby