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Release Notes IBM PowerHA SystemMirror for Linux Version 7.2.2 Release Notes IBM Note Before using this information and the product it supports, read the information in “Notices” on page 7 . Third edition (June 2018) This edition applies to IBM® PowerHA® SystemMirror® 7.2.2 for Linux and to all subsequent releases and modifications until otherwise indicated in new editions. © Copyright International Business Machines Corporation 2017, 2018. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents About this document..............................................................................................v Highlighting...................................................................................................................................................v Case-sensitivity in Linux...............................................................................................................................v ISO 9000.......................................................................................................................................................v PowerHA SystemMirror Version 7.2.2 for Linux Release Notes................................ 1 New functions and features.........................................................................................................................1 Software requirements................................................................................................................................ 3 Installation................................................................................................................................................... 4 Additional information................................................................................................................................. 5 Notices..................................................................................................................7 Privacy policy considerations...................................................................................................................... 8 Trademarks.................................................................................................................................................. 9 iii iv About this document The Release Notes topics include late technical information that is not included in other topics, and they highlights new functions for the PowerHA SystemMirror Version 7.2.2 for Linux licensed program. Highlighting The following highlighting conventions are used in this document: Bold Identifies commands, subroutines, keywords, files, structures, directories, and other items whose names are predefined by the system. Bold highlighting also identifies graphical objects, such as buttons, labels, and icons that the you select. Italics Identifies parameters for actual names or values that you supply. Identifies examples of specific data values, examples of text similar to what you Monospace might see displayed, examples of portions of program code similar to what you might write as a programmer, messages from the system, or text that you must type. Case-sensitivity in Linux Everything in the Linux operating system is case-sensitive, which means that it distinguishes between uppercase and lowercase letters. For example, you can use the ls command to list files. If you type LS, the system responds that the command is not found. Likewise, FILEA, FiLea, and filea are three distinct file names, even if they reside in the same directory. To avoid causing undesirable actions to be performed, always ensure that you use the correct case. ISO 9000 ISO 9000 registered quality systems were used in the development and manufacturing of this product. © Copyright IBM Corp. 2017, 2018 v vi IBM PowerHA SystemMirror for Linux Version 7.2.2: Release Notes PowerHA SystemMirror Version 7.2.2 for Linux Release Notes New functions and features PowerHA support on RHEL 7.5 PowerHA SystemMirror Version 7.2.2 for Linux is supported on RHEL 7.5. Note: Support for SAP HANA 2.0 on RHEL for SAP Application 7.5 is not yet tested with PowerHA Linux. Support for ext4 file systems PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 2, or later, supports ext4 type of file systems also in addition to ext3 and xfs. Support for PowerHA upgrade PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 2, or later, support PowerHA upgrade and this is possible with OFFLINE migration. • User can migrate PowerHA to a higher version while keeping the cluster configuration intact. • During offline migration, the cluster is not available so all the resource groups need to be stopped. Enhancements in Smart Assist PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 2, or later, supports below enhancements: 1. Smart Assist delete operation is now specific to Application (SAP_HANA etc.). 2. FQDN support for SAP HANA nodes is added. PowerHA SystemMirror GUI The following updates are new in PowerHA SystemMirror GUI with Service Pack 2: • Add new clusters as a non-root user. A non-root user will be able to add cluster from PowerHA System Mirror graphical user interface (GUI). For more information, see the Discovering a cluster as a non-root user topic. • A secure, single access point to all clusters • A health-at-a-glance dashboard that highlights any problems that you need to be aware of • Cluster zoning provides unprecedented organization and security • High Availability of GUI • Snapshot support from GUI • Application Monitoring Suspend and Resume feature • A clean view of critical cluster and system logs • Cluster Modify along with the modification of Resource Group, resources including Service IP, Application or Filesystem • The option to authenticate by using an SSH key is now available. SSH authentication is now supported both by private key and passphrase along with password support earlier. SAP HANA and SAP NetWeaver on same cluster PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 1, or later, can run ABAP Central services instance (ASCS) and also database (SAP HANA) on same nodes (2 or 3 nodes). SAP NetWeaver and the database server can be separated into different nodes (4 nodes) when SAP HANA and SAP NetWeaver are running on same cluster. SAP HANA and SAP NetWeaver can be configured in © Copyright IBM Corp. 2017, 2018 1 same the cluster, which can create the StartAfter relationship between SAP Application server resource groups and SAP HANA primary resource group. Support for SAP HANA on RHEL In PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 1, or later, the Smart Assist application supports making SAP HANA highly available on RHEL for the SAP solutions. Support for LDAP PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 1, or later, supports OpenLDAP to manage LDAP users and user groups across all PowerHA SystemMirror clusters. For using OpenLDAP with PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 1, or later, the following prerequisites are required: • OpenLDAP Server must be installed, configured, and must be accessible from all cluster nodes. • OpenLDAP Client must be installed and configured on all cluster nodes. In PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 1, or later, the user groups provide an additional level of security and enable the system administrators to change the configuration settings of a group of users as a single entity. Users and user groups can be managed by using the clmgr command from any node in a cluster. The clmgr command sends new and updated information to all of the other nodes in the cluster. Support for file system on shared storage PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 1, or later, supports both the ext3 and xfs type of file systems. PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 1, or later, allows to add or delete a file system in PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 1, or later, or system configuration and resource group. The resource group that consist of only file systems as resources supports startup policy to come online on any node in the node list and does not support fallback policy. Support for resource group reset If one or more resources in a resource group are in error state (FAILED OFFLINE or STUCK ONLINE), PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 1, or later, allows to reset all concerned resources currently in error state within same resource group by using the clmgr command to reset a specific resource group. The resource group must be reset only after the actual issue leading to resource being in an error state is fixed or resolved by user or concerned technical expert. Support to resource group deletion forcefully If a resource group cannot be deleted automatically then PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 1, or later, deletes it forcefully. However, the deletion of resource group forcefully is not recommended because if any resources in that resource group such as an application or a service_IP are in an error state STUCK ONLINE, then those resources are deleted with an exception of file system. Updated verification checks for cluster In PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 1, or later, the verification process runs the following check: • In PowerHA SystemMirror Version 7.2.2 for Linux with Service Pack 1, or later, specific modifications to the Linux system files are correct. • The cluster
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