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Configuration Files


This appendix discusses the configuration files that are required for the Oracle Enterprise Manager and its components.

Configuration Files

The Oracle Enterprise Manager Console uses a daemon process for network communication with the Oracle Intelligent Agents on remote systems. The network communication is done using Oracle's SQL*Net product.

Job Scheduling, Event Management, Software Manager, Data Manager, Backup Manager, and Tablespace Manager rely on communication between the Console, agent, and daemon, and require SQL*Net.

SQL*Net requires a number of configuration files in order to work.

  1. snmp_ro.ora and snmp_rw.ora are created by the Intelligent Agent.
  2. listener.ora is required if a database is on the node. An agent can be installed on a machine without a database.

On both the Console and host node, the sqlnet.ora file, which contains items such as domain name and trace level, is needed:

On the host node where the Oracle database and agent reside, the following additional files are needed.

On the Console side of the connection, the topology file is required for releases previous to Enterprise Manager 1.3.6 and Intelligent Agent 7.3.4. This additional file is needed to populate the Navigator tree if the Intelligent Agent is not used with the Navigator Discovery feature.

Configuration for Console Machine

The following are examples of the configuration files needed on the machine where the Oracle Enterprise Manager Console is run:

sqlnet.ora

################
# File name......: sqlnet.ora
# Name..........: tcpcom.world
# Date..........: 13-AUG-97 10:09:52
################
AUTOMATIC_IPC = ON
TRACE_LEVEL_CLIENT = OFF
SQLNET.EXPIRE_TIME = 0
NAMES.DEFAULT_DOMAIN = world
NAME.DEFAULT_ZONE = world
SQLNET.CRYPTO_SEED = "2418306024240649"
SQLNET.AUTHENTICATION_SERVICES = (ALL)
DAEMON.TRACE_LEVEL = 15
DAEMON.TRACE_MASK = (106)
DAEMON.TRACE_DIRECTORY = c:\orant\net80\trace

Important things to note about this sqlnet.ora is that the domain name is world, which means any service name in tnsnames.ora should have world tagged onto it. Also, the three parameters which start with DAEMON control the tracing of the Daemon process. To switch off tracing set DAEMON.TRACE_LEVEL to the value OFF. Also make sure to change the trace directory to reflect the current ORACLE_HOME.

The above example assumes ORACLE_HOME is set to C:\ORANT. When tracing is switched on, a trace file called daemon.trc appears in the directory specified by the DAEMON.TRACE_DIRECTORY parameter.

tnsnames.ora

################
# Filename......: tnsnames.ora
# Name..........: LOCAL_REGION.world
# Date..........: 13-AUG-97 10:09:52
################
mydb.world =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = tcpcom.world)
(PROTOCOL = TCP)
(Host = myhost)
(Port = 1526)
)
)
(CONNECT_DATA =
(SID = mysid)
(GLOBAL_NAME = mydb.world)
)
)

Configuration for Remotely Managed Machines

The following are some of the example configuration files which may be needed for the machine where the Oracle database and the Oracle Intelligent agent run.

sqlnet.ora

################
# Filename......: sqlnet.ora
# Name..........: myhost.world
# Date..........: 13-AUG-97 10:09:52
################
AUTOMATIC_IPC = ON
TRACE_LEVEL_CLIENT = OFF
SQLNET.EXPIRE_TIME = 0
NAMES.DEFAULT_DOMAIN = world
NAME.DEFAULT_ZONE = world
SQLNET.CRYPTO_SEED = "2418306024240649"
SQLNET.AUTHENTICATION_SERVICES = (ALL)

The most important thing to note about this sqlnet.ora is that the domain name is world which means any service name in tnsnames.ora should have world tagged onto it.

tnsnames.ora

################
# Filename......: tnsnames.ora
# Name..........: LOCAL_REGION.world
# Date..........: 13-AUG-97 10:09:52
################
mydb.world =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = tcpcom.world)
(PROTOCOL = TCP)
(Host = myhost)
(Port = 1526)
)
)
(CONNECT_DATA =
(SID = mysid)
(GLOBAL_NAME = mydb.world)
)
)

listener.ora

################
# Filename......: listener.ora
# Name..........: myhost.world
# Date..........: 13-AUG-97 10:09:52
################
mylsnr =
(ADDRESS_LIST =
(ADDRESS=
(PROTOCOL=IPC)
(KEY= mydb.world)
)
(ADDRESS=
(PROTOCOL=IPC)
(KEY= mysid)
)
(ADDRESS =
(COMMUNITY = tcpcom.world)
(PROTOCOL = TCP)
(Host = myhost)
(Port = 1526)
)
)
STARTUP_WAIT_TIME_mylsnr = 0
CONNECT_TIMEOUT_mylsnr = 10
TRACE_LEVEL_mylsnr = OFF
SID_LIST_mylsnr =
(SID_LIST =
(SID_DESC =
(SID_NAME = mysid)
(ORACLE_HOME = /myoraclehome)
(PRESPAWN_MAX = 10)
)
)

This example of listener.ora defines the listening address for the SQL*Net Listener mylsnr and tells it about the Oracle Database mysid. To start this listener, enter the command:

$ lsnrctl start mylsnr

This command explicitly specifies the name of the SQL*Net listener.

snmp.ora for Pre-7.3.3 Agents Only

################
# Filename......: snmp.ora.sample
#################
snmp.visibleservices = (db_name.world, host_name_lsnr.world)
snmp.index.db_name.world = 1
snmp.index.host_name_lsnr.world = 2
snmp.contact.db_name.world = contact_info
snmp.contact.host_name_lsnr.world = contact_info
snmp.sid.db_name.world = server_id
snmp.oraclehome.db_name.world=$ORACLE_HOME
nmi.register_with_names=false
nmi.trace_level = 0
nmi.trace_directory = $ORACLE_HOME\network\trace
dbsnmp.address = (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=host_name)(PORT=1748)))
dbsnmp.spawnaddress = (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=host_name)(PORT=1754)))

This snmp.ora example is used by a pre-7.3.3 Intelligent Agent, or a 7.3.3 Intelligent Agent registering with the Names Server. Pre-7.3.3 Intelligent Agents can use any port number, as long as the numbers match the tnsnames.ora entries for the Agent.

The configuration files, snmp_ro.ora, and snmp_rw.ora, provide configuration parameters for the agent. These files are created by the 7.3.3 (and later) Intelligent Agent.

snmp_ro.ora

The snmp_ro.ora file is located in $ORACLE_HOME\network\admin on Windows NT platforms. This file is located in $ORACLE_HOME/network/admin on UNIX. Do not update this read-only file. It contains the following parameters:

SNMP.VISIBLESERVICES = (LISTENER, service_name1, service_name2, ...)
SNMP.SID.service_name = server_id
SNMP.ORACLEHOME.service_name = ORACLE_HOME_DIR

snmp_rw.ora

The snmp_rw.ora is located in $ORACLE_HOME\network\admin on Windows NT platforms. You can modify this read-write file, but this should be done carefully. It contains the following parameters:

SNMP.INDEX.service_name = index_number
SNMP.CONTACT.service_name.world = "contact_info"
NMI.REGISTER_WITH_NAMES = FALSE
NMI.TRACE_LEVEL = OFF | USER | ADMIN | nn

The 7.3.4 agent requires port address 1748 and 1754. TCP/IP protocol is required to automatically discover services with the 7.3.4 agent. The port address is automatically set.

The following parameters are not automatically generated, but may be added to the file:

SNMP.CONNECT.service_name.USER = user_name
SNMP.CONNECT.service_name.PASSWORD = password
SNMP.DBPOLLTIME = nn
NMI.TRACE_DIRECTORY = directory
NMI.TRACE_FILE = filename
NMI.LOG_DIRECTORY = directory
NMI.LOG_FILE = filename

services.ora

The services.ora file is created when the agent starts and is located in $ORACLE_HOME\network\agent on the Windows NT platform and $ORACLE_HOME/network/agent on UNIX. This file contains a list of the services, such as Oracle databases and listeners, on the node where the agent resides. This file is retrieved from the agent by Oracle Enterprise Manager through the Navigator Discovery menu options.

Parameters for snmp*.ora Files

These parameters are used in the snmp_ro.ora and snmp_rw.ora files, the configuration files for the 7.3.4 Intelligent Agent release. These parameters are also used in the snmp.ora file, the primary configuration file for Intelligent Agent releases prior to the 7.3.4 release.

In the following parameters, note these substitutions:

Note:

If .world is used in the sqlnet.ora file, then you must use .world in the snmp.ora and tnsnames.ora files. For example, service_name.world and host_name_lsnr.world.

SNMP.VISIBLESERVICES = (service_name1.world, service_name2.world, ...)

The name of the services that the agent is monitoring. Each database and each SNMP-manageable service must be listed. For a database, the service name is the name of the database as it appears in the tnsnames.ora file or in the Names Server.

SNMP.INDEX.service_name.world = index_number

The unique index number of the service that the agent is monitoring.

SNMP.SID.service_name.world = server_id

The server Id (SID) of the database service that the agent is monitoring.

SNMP.CONNECT.service_name.world.USER = user_name

The username that the subagent uses to connect to the database. The default is dbsnmp. This parameter is optional.

SNMP.CONNECT.service_name.world.PASSWORD = password

The password for the username that is used by the subagent to connect to the database. The default is dbsnmp. This parameter is optional.

SNMP.ORACLEHOME.service_name.world = ORACLE_HOME_DIR

The Oracle home directory of the database. A separate entry is required for each database even if ORACLE_HOME_DIR is the same for all services.

SNMP.CONTACT.service_name.world = "contact_info"

A string containing contact information, such as name, phone number, and email, of the administrator responsible for the service. This parameter is optional.

DBSNMP.POLLTIME = nn

The time interval (seconds) that the agent polls the database to check whether it is down. If the database has gone down or was never connected, this is the interval between retries. The default is 30 seconds.

NMI.TRACE_LEVEL = OFF | USER | ADMIN | nn

Turns on tracing at the specified level. Oracle recommends that you set the trace level to 13. Level 15 produces a deluge of information, which is only useful if a bug is being investigated. This parameter is optional.

NMI.TRACE_DIRECTORY = directory

Directory where trace file is written. The setting is only relevant in conjunction with nmi.trace_level. If omitted, trace files are written to $ORACLE_HOME\network\trace. This parameter is optional.

NMI.TRACE_FILE = filename

Filename of the trace file. This parameter is optional.

NMI.LOG_DIRECTORY = directory

Directory where log file is written. This parameter is optional.

NMI.LOG_FILE = filename

Filename of the log file. This parameter is optional. On Windows NT, the filename defaults to dbsnmp.

dbsnmp.address = (DESCRIPTION=(ADDRESS=(PROTOCOL=protocol) (HOST=host_name)(PORT=port_no)))

The TNS address that the agent uses to listen for incoming requests. There should be no space or return characters in the address. This parameter is the address that the Agent listens on for network connections.

TCP/IP is the only protocol supported by Oracle. TCP/IP is required to automatically discover services with the 7.3.4 agent.

The 7.3.4 agent requires PORT=1748. The port address 1748 is a registered TCP port granted to Oracle by the Internet Assigned Number Authority (IANA). The port address is automatically set. Changing this port makes the agent undetectable by the Enterprise Manager Console and forces a manual configuration setup.

For agent releases previous to the 7.3.4 release, this address must match exactly the entry for this agent in the tnsnames.ora file on the machine where the Oracle Enterprise Manager Console resides.

dbsnmp.spawnaddress = (DESCRIPTION=(ADDRESS= (PROTOCOL=protocol) (HOST=host_name)(PORT=spnport_no)))

The TNS address which the agent can use to accept RPC's. This address is used for file transfers. The spnport_no used in this parameter is different than port_no used in the DBSNMP.ADDRESS parameter.

The 7.3.4 agent PORT=1754. The port address 1754 is a registered TCP port granted to Oracle by the Internet Assigned Number Authority (IANA). Changing this port makes the agent undetectable by the Enterprise Manager Console and forces a manual configuration setup.




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