HP OpenView Process & Files CS720H May, 24, 2000

POSTECH DP&NM Lab. (2)(2)CORBA-based Agent At startup

POSTECH DP&NM Lab. (3)(3)CORBA-based Agent ovstart, ovspmd ovstart –Start the various processes (daemon) –At first, check if ovspmd is running, if ovspmd is not running, starts ovspmd –When you reboot the system, boot script automatically execute ovstart –Ex) Solaris 2.X /etc/init.d/netmgt ovspmd –Maintains a communication channel for request from ovstart –Send status responses to ovstart –Starts background processes, pmd, ovwdb, ovactiond, snmpCollect, ovtopmd, ovrepld, ovlmd, ovtrapd and netmon according to the start-up configuration file ovsuf –Each process is a child of ovspmd and must run under the control of ovspmd –The ovspmd process maintains a communication channel with each process –The ovspmd uses this channel to send commands to the processes and to receive status responses from them

POSTECH DP&NM Lab. (4)(4)CORBA-based Agent $OV_CONF/ovsuf Contains the configuration information for ovspmd Each entry in ovsuf is created by ovaddobj from informaton in the LRF (Local Registration File). There is at least one LRF for each of the background processes ovsuf example 1:ovwdb:ovwdb:OVs_YES_START::-O:OVs_WELL_BEHAVED:15:PAUSE:: 0:pmd:pmd:OVs_YES_START:::OVs_WELL_BEHAVED:15:PAUSE:: LRF example netmon:netmon: OVs_YES_START:ovtopmd,pmd,ovwdb:-P -k segRedux=true:OVs_WELL_BEHAVED:15:PAUSE::

POSTECH DP&NM Lab. (5)(5)CORBA-based Agent During operation (Part 1)

POSTECH DP&NM Lab. (6)(6)CORBA-based Agent During operation (Part 2)

POSTECH DP&NM Lab. (7)(7)CORBA-based Agent Background Processes (1) netmon –Polls SNMP agents to initially discover network topology –Detects topology, configuration and status changes in the network –Uses a “seed file” containing a list of nodes to define the initial management region –Uses the oid_to_type and HPoid2type file to determine correct IP topology behavior and correct vendor and SNMP agent value –oid_to_type example :Micro Technology:MT LANCE/NMS agent –HPoid2type :Hewlett-Packard:HP 3000/XL:6

POSTECH DP&NM Lab. (8)(8)CORBA-based Agent Background Processes (2) ovtopmd –Maintains the network topology database –The topology database is a set of files in the $OV_DB/openview/topo –Initially reads it, if non exist, create and populate it –Controls and updates the topology database on information from netmon indicating that changes have occurred –Database files: binary file format Ininfo.dir, ininfo.pag, netinfo.dir, netinfo.pag, nodeinfo.dir, nodeinfo.pag Seginfo.dir, seginfo.pag, stationinfo.dir, stationinfo.pag, topoinfo.dir, topoinfo.pag

POSTECH DP&NM Lab. (9)(9)CORBA-based Agent Background Processes (3) ovwdb –Controls the object database –The object database stores information about the object that NNM uses for describe operations –ovwdb must be running for NM to work pmd –Receives and forwards events –Logs events to the files $OV_LOG/trapd.log and $OV_LOG/trapd.log.old –Forwards events from the network on to other applications that have connected to pmd using the SNMP API ovtrapd –Receives SNMP traps and forwards them to pmd –Responds to SNMPv2 inform requests

POSTECH DP&NM Lab. (10)CORBA-based Agent Background Processes (4) ovactiond –Receives events from pmd –Executes commands by trapd.conf –trapd.conf Ex) CATEGORY 0 "IGNORE" "IGNORE“ ACTION 60 "Print Alarms" printEvents SDESC OID_ALIAS snmpTraps ….. snmpCollect –Collects MIB data and store the data in the $OV_DB/snmpCollect directory –Perform threshold monitoring and sends threshold events to pmd Ovlmd –Coordinates communication between the license server and the NNM Ovrepld –Responsible for object replication

POSTECH DP&NM Lab. (11)CORBA-based Agent Foreground Processes (1) ovw –Provides map drawing, map editing and menu management ipmap –Runs under ovw to automatically draw IP topology maps representing network xnmevents –Display events that are being received by pmd xnmtrap –The process is invoked by the Option:Event Configuration menu –Define enterprise-specific events (traps) –You can customize the message displayed when a particular event arrives –You can specify a command or a script that should be executed when a particular event arrive

POSTECH DP&NM Lab. (12)CORBA-based Agent Foreground Processes (2) xnmsnmpconf –The process is invoked by the Option:SNMP Configuration menu –You can add,delete and modify SNMP configuration parameter (community name, number of retries, etc. ) –You can change the netmon status polling interval xnmloadminb –The process is invoked by the Option:Load/Unload MINs:SNMP menu –Load new Internet-standard or enterprise-specific MIBs into the loaded MIB database xnmbrowser –The process is invoked by the Misc:SNMP MIB Browser menu –Get and set MIB values for MIB objects xnmcollect –The process is invoked by the Options:Data Collection & Thresholds: SNMP menu –Configure the manager to collect MIB data from network object at regular intervals

POSTECH DP&NM Lab. (13)CORBA-based Agent Foreground Processes (3) xnmbuilder –The process is invoked by the Options:MIB Application Builder:SNMP menu –Build custom screens to manage multi-vendor MIB objects xnmgraph –Graph the results of monitoring operations for managed SNMP objects xnmappmon –Displays textual results of monitoring operations for managed SNMP objects xnmpolling –The process is invoked by the Options:Network Polling Configuration: IP menu –Updates the polling configuration mibform, mibtable, rnetstat,findroute,rdbf,rping –Monitor and diagnose problems in TCP/IP network

POSTECH DP&NM Lab. (14)CORBA-based Agent Databases The Map Database –Presentation information per map –Exact symbol placement, symbol association with each object and symbol labels The Object Database –Global object information –sysObjectId, vendor and SNMP Agent The Topology Database –Topology information and layout –Much of information of object database is duplicated in the toplology database

POSTECH DP&NM Lab. (15)CORBA-based Agent Implementation Issues Implementation Platform –OS –Language –… What can we reuse from previous work? Job assignment Schedule

POSTECH DP&NM Lab. (16)CORBA-based Agent PosView Level-0 Design

POSTECH DP&NM Lab. (17)CORBA-based Agent Level-1 Use case diagram: Set data

POSTECH DP&NM Lab. (18)CORBA-based Agent Level-1 Use case diagram: Discover agent

POSTECH DP&NM Lab. (19)CORBA-based Agent Level-1 Use case diagram: Notify alarm

POSTECH DP&NM Lab. (20)CORBA-based Agent Level-1 Use case diagram: Collect data