Attaching a Shared Disk and Binding a Floating IP Address (Distributed HA Deployment)

Scenarios

In the distributed HA deployment scenario, the active and standby ASCS nodes synchronize data using the shared disk. This section provides guidance for you to bind the data disk of the active ASCS node to the standby ASCS node and bind the floating IP address to the active and standby ASCS nodes.

Prerequisites

The SSH switching between the active and standby SAP ASCS nodes has been allowed.

Procedure

Binding to a Shared Disk

1. On the management console, choose Compute > Elastic Cloud Server. The page showing the ECS list is displayed.
2. Click the name of the active ASCS ECS.
4. On the displayed page, click Attachments and then Attach. The Attach Disk page is displayed.
5. On the Attach Disk page, select the target standby ASCS ECS, ensure that its Mount Point is the same as the Device Name in 4, and click OK.

Creating a Floating IP Address and Binding it to the ECS

6. On the ECS list page, click the name of the active ASCS ECS.
8. Click Assign Virtual IP Address, select the assignment mode as required, and click OK. Assign two virtual IP addresses for the switchover between the active and standby ASCS ECSs.
9. After virtual IP addresses are assigned, bind each virtual IP address to both the active and standby ASCS ECSs.
10. Log in to the active ASCS ECS and write the mapping between all IP addresses and hostnames of all SAP NetWeaver ECSs to the /etc/hosts file. The following uses the active and standby ASCS nodes as an example.

    10.0.3.52       netweaver-0001
    10.0.3.196      netweaver-0002
    10.0.3.52       ascsha
    10.0.3.196      ersha

    

    • ascsha indicates the virtual hostname of the active ASCS node and ersha indicates the virtual hostname of the standby ASCS node. The virtual hostname can be customized.
    • You do not need to write the mapping between the virtual IP addresses and virtual hostnames. The virtual IP addresses take effect only after the HA is configured. Do not bind virtual IP addresses to virtual hostnames before the virtual IP addresses take effect. After the ASCS and ERS instances are installed, write the mapping between the virtual IP addresses and virtual hostnames to the hosts file.

11. Copy the hosts file to other SAP NetWeaver ECSs.