Emerson 4620 manual High Availability, HPI Daemon

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HPI Daemon	System Management Interfaces Overview

The single shelf library supports the communication with one HPI daemon only. Since it is only used internally and is not intended to be used by user applications, it will not be described any further in this manual. The multishelf library, on the other hand, supports the communication with one up to several HPI daemons. This becomes necessary if you wish to deploy redundancy in one HPI-B based shelf management system or if you wish to manage several shelves. The multishelf library is the library which you should build your applications on, it is the official interface to customer applications.

Details about supported combinations of CPU architecture/Linux distribution are given in Chapter 2, Software Installation and Configuration, on page 17.

1.3.2HPI Daemon

The HPI daemon within an Centellis 4620 system runs on the ATCA-F120 blades and its main tasks are:

zProvide a single access point to control and monitor hardware components in a shelf

zMap information provided by the underlying Shelf Manager to HPI

1.4High Availability

The Emerson HPI-B implementation described in this manual supports the following two redundancy options:

zActive/active

zCold-standby

The active/active option is the default configuration. Both HPI daemons in shelf are active and run simultaneously. Your application connects to one daemon and if the connection fails it connects to the second daemon. Note that the current HPI-B implementation does not replicate any data between the two daemons, this means data consistency is not guaranteed.

Alternatively you may choose to use the cold-standby redundancy option. In this configuration your application must make sure that only one HPI daemon is active at a time. If the daemon fails, your application starts up the second, previously inactive daemon and connects to it.

During start-up the HPI daemon scans the current system environment. This way it is ensured that the daemon reflects the current system configuration.

System Management Interface Based on HPI-B (Centellis 4620) User’s Guide (6806800D85A)

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Contents System Management Interface Based on HPI-B Centellis Contact Address Contents Related Documentation ContentsDefinition of Domain Management Resource List of TablesPage List of Figures Page Overview of Contents About this ManualAbbreviations Bold ConventionsAbout this Manual Abbreviation Description Notation DescriptionSummary of Changes Comments and SuggestionsAbout this Manual Notation Description Page Architecture System Management Interfaces OverviewIntroduction Standard CompliancesSystem Management Interfaces Overview HPI Library HPI LibraryHigh Availability HPI DaemonHPI Daemon Page RPM Files for HPI-B Clients and Daemons Software Installation and ConfigurationInstalling and Configuring the HPI-B Daemon OverviewDirectory Description Installing an HPI-B DaemonConfiguring an HPI Daemon Overview of HPI-B Directories and Files on ATCA-F120Setting Up HPI Clients Installing HPI ClientsOverview of HPI-B Directories and Files on Node Blades Entry Description Configuring HPI ClientsMultishelf Library Configuration File HPI Daemon Entries IP Addresses/Ports of HPI Daemons in a Centellis 4620 ShelfDevelopment RPMs Directory Structure Directory ContentDeveloping Applications Building the ApplicationPage Using HPI-B Limitations with Respect to HPI-B Base SpecificationLimitations Overview Working with the Multishelf LibraryAccessing HPI Domains Using HPI-B Accessing HPI DomainsHow Domains and Shelves are Represented Using HPI-B How Domains and Shelves are RepresentedHow Domains and Shelves are Represented Using HPI-B SaHpiRdrT Value Definition of Domain Management ResourceDomain Management Control RDR SaHpiRptEntryT ValueDomain Management Control Domain Management Control StateShelf Management Resource Connection State RDR Using HPI-BHow Domains and Shelves are RepresentedDomain Connection Sensor Events Discovering Shelves and DomainsDomain Connection Sensor Domain Connection Sensor ReadingUsing HPI-B Adding and Removing Shelves and Domains Adding and Removing Shelves and DomainsParameter Value Emerson Extensions Emerson Extensions Using HPI-BUsing HPI-B HPI Controls for Domain and Shelf Management Ipmi System Boot Options Support10 Boot Option RDR 11 Boot Option ControlSet operations 12 Boot Option StateIpmi System Boot Options SupportUsing HPI-B Get operations14 Post Type HPI Control Sate Values Post Type ControlHPI Logging Support 13 Post Type HPI Control RDRHPI Logging Support Using HPI-B 15 Log RDR16 Log Control 17 Log Control State Using HPI-BHPI Logging SupportExample Applications Example Application Source FilesList of Supported Example Applications Example Applications List of Supported Example Applications List of Supported Example ApplicationsExample Applications Display everything #------------------------------hpifumi #------------------------------ hpihotswap String Example Applications List of Supported Example Applications Option #------------------------------ hpishelf Value Display sensors Related Documentation Emerson Network Power Embedded Computing DocumentsRelated Specifications Table B-2 Related Specifications