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HP OpenView Process & Files CS720H May, 24, 2000 At startup CORBA-based Agent (2) POSTECH DP&NM Lab. 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 CORBA-based Agent (3) POSTECH DP&NM Lab. $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.lrf netmon:netmon: OVs_YES_START:ovtopmd,pmd,ovwdb:-P -k segRedux=true:OVs_WELL_BEHAVED:15:PAUSE:: CORBA-based Agent (4) POSTECH DP&NM Lab. During operation (Part 1) CORBA-based Agent (5) POSTECH DP&NM Lab. During operation (Part 2) CORBA-based Agent (6) POSTECH DP&NM Lab. 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 • 1.3.6.1.4.1.4.1.1:Micro Technology:MT LANCE/NMS agent – HPoid2type • 1.3.6.1.4.1.11.2.3.4.1:Hewlett-Packard:HP 3000/XL:6 CORBA-based Agent (7) POSTECH DP&NM Lab. 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 CORBA-based Agent (8) POSTECH DP&NM Lab. 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 CORBA-based Agent (9) POSTECH DP&NM Lab. 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 .1.3.6.1.6.3.1.1.5 ….. • 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 CORBA-based Agent (10) POSTECH DP&NM Lab. 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 CORBA-based Agent (11) POSTECH DP&NM Lab. 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 CORBA-based Agent (12) POSTECH DP&NM Lab. 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 CORBA-based Agent (13) POSTECH DP&NM Lab. 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 CORBA-based Agent (14) POSTECH DP&NM Lab. Implementation Issues • Implementation Platform – OS – Language – … • What can we reuse from previous work? • Job assignment • Schedule CORBA-based Agent (15) POSTECH DP&NM Lab. PosView Level-0 Design Level 0: Use-case diagram Set data Discover agent Application Mgt SNMP Agent Notify alarm Collect data CORBA-based Agent (16) POSTECH DP&NM Lab. Level-1 Use case diagram: Set data Application Mgt CORBA-based Agent Requst set(Request Handler) (17) SNMP Agent POSTECH DP&NM Lab. Level-1 Use case diagram: Discover agent Check host alive(Ping Checker) Application Mgt Find agents(Discovery Engine) SNMP Agent Check Agent alive(Request Handler) Log agent data(Logging) CORBA-based Agent (18) POSTECH DP&NM Lab. Level-1 Use case diagram: Notify alarm Application Mgt Generate notification(Alarm Handler) Filter trap(Event Handler) Receive Trap(Trap handler) SNMP Agent Log event data(logging) CORBA-based Agent (19) POSTECH DP&NM Lab. Level-1 Use case diagram: Collect data Request data(Data Collector) poll data(Polling Engine) Request mib data(Request handler) SNMP Agent Application Mgt Retrieve data(Data Collector) CORBA-based Agent Log mib data(logging) (20) Storage POSTECH DP&NM Lab.