Transcript HP OpenView Process & Files

HP OpenView
Process & Files
CS720H
May, 24, 2000
At startup
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ovstart, ovspmd
• ovstart
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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
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$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::
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During operation (Part 1)
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During operation (Part 2)
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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
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Background Processes (2)
• ovtopmd
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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
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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
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Background Processes (4)
• ovactiond
– Receives events from pmd
– Executes commands by trapd.conf
– trapd.conf Ex)
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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
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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
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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
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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
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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
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Implementation Issues
• Implementation Platform
– OS
– Language
– …
• What can we reuse from previous work?
• Job assignment
• Schedule
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PosView Level-0 Design
Level 0: Use-case diagram
Set data
Discover agent
Application Mgt
SNMP Agent
Notify alarm
Collect data
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Level-1 Use case diagram: Set data
Application Mgt
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Requst set(Request Handler)
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SNMP Agent
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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)
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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)
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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)
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Log mib data(logging)
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Storage
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