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Configure advanced SnapCenter options for SAP HANA

Contributors netapp-nbauer
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Configure advanced SnapCenter settings for SAP HANA environments, including suppressing VMware warning messages for in-guest NFS mounts, disabling automated log backup housekeeping, and enabling SSL encryption for HANA database connections.

Warning message with virtualized environments and in-guest mounts

When using for example VMware with NFS in-guest mounts, SnapCenter will issue a warning message, that the SnapCenter VMware plug-in should be used. Since the VMWare plug-in is not required for in-guest mounts the warning message can be ignored and switched off. To configure SnapCenter to suppress this warning, the following configuration must be applied:

  1. From the Settings tab, select Global Settings.

  2. For the hypervisor settings, select VMs Have iSCSI Direct Attached Disks or NFS For All the Hosts and update the settings.

hana sc generic image 134

Deactivate automated log backup housekeeping

Log backup housekeeping is enabled by default and can be disabled on the HANA plug-in host level. Use the PowerShell command:

The command Set- SmConfigSettings -Plugin - HostName <pluginhostname> - PluginCode hana - configSettings @{"LOG_CLEANUP_DISABLE" = "Y"} disables the log backup housekeeping for this SAP HANA host.

Enable secure communication to HANA database

If the HANA databases are configured with secure communication, the hdbsql command that is executed by SnapCenter must use additional command-line options.

There are various options to configure the SSL communication. By default, SnapCenter uses the -e ssltrustcert hdbsql command-line option. With this option SSL communication without server certificate validation is done and this option also works for HANA systems where SSL is not enabled.

If certificate validation on server and/or client side is required, different hdbsql command line options are needed, and you must configure the PSE environment accordingly as described in the SAP HANA Security Guide.

This can be achieved by using a wrapper script which calls hdbsql with the required options. Instead of configuring the hdbsql executable in the hana.properties files, the wrapper script is added.

HANA_HDBSQL_CMD = /usr/sap/SM1/HDB12/exe/hdbsqls

The wrapper script hdbsqls calls hdbsql with the required command-line options.

#/bin/bash
/usr/sap/SM1/HDB12/exe/hdbsql <command line options> $*

Disable auto discovery on the HANA plug-in host

To disable auto discovery on the HANA plug-in host, complete the following steps:

  1. On the SnapCenter Server, open PowerShell. Connect to the SnapCenter Server by running the Open- SmConnection command and specify the username and password in the opening login window.

  2. To disable auto discovery, run the Set- SmConfigSettings command.

For a HANA host hana-2, the command is as follows:

PS C:\Users\administrator.SAPCC> Set-SmConfigSettings -Agent -Hostname hana-2 -configSettings @{"DISABLE_AUTO_DISCOVERY"="true"}

Name Value

---- -----

DISABLE_AUTO_DISCOVERY true

PS C:\Users\administrator.SAPCC>

Verify the configuration by running the Get- SmConfigSettings command.

PS C:\Users\administrator.SAPCC> Get-SmConfigSettings -Agent -Hostname hana-2 -key all

Key: CUSTOMPLUGINS_OPERATION_TIMEOUT_IN_MSEC Value: 3600000 Details: Plug-in API operation Timeout

Key: CUSTOMPLUGINS_HOSTAGENT_TO_SERVER_TIMEOUT_IN_SEC Value: 1800 Details: Web Service API Timeout

Key: CUSTOMPLUGINS_ALLOWED_CMDS Value: *; Details: Allowed Host OS Commands

Key: DISABLE_AUTO_DISCOVERY Value: true Details:

Key: PORT Value: 8145 Details: Port for server communication

PS C:\Users\administrator.SAPCC>

The configuration is written to the agent configuration file on the host and is still available after a plug-in upgrade with SnapCenter.

hana-2:/opt/NetApp/snapcenter/scc/etc # cat /opt/NetApp/snapcenter/scc/etc/agent.properties | grep DISCOVERY
DISABLE_AUTO_DISCOVERY = true
hana-2:/opt/NetApp/snapcenter/scc/etc #