rtgpoll(1)rtgpoll(1)NAMErtgpoll - RTG SNMP polling daemon
SYNOPSISrtgpoll-t file [options]
DESCRIPTIONrtgpoll queries SNMP-capable devices and inserts the results of these
queries into a MySQL database. The poller reads a fixed-format target
file, randomizes the targets and maintains a set number of queries in
flight. rtgpoll optionally reads a configuration file to modify run-
time parameters.
OPTIONS-t file
Target file. See target file section below for additional
details.
-c file
Configuration file. See configuration file section below for
additional details.
-d Disable database inserts.
-m Skip checking for multiple instances.
-p file
PID file. Process ID file.
-z Force database insertion of zero deltas.
-v Increase verbosity by one level. Four verbosity levels exist
(in increasing order): Off, Low, High, Debug.
CONFIGURATION FILE
All RTG programs attempt to find an rtg.conf file in the following path
order:
1. ./rtg.conf
2. /usr/local/rtg/etc/rtg.conf
3. /etc/rtg.conf
If rtgpoll or rtgplot cannot find an rtg.conf file in any of these
paths, it will attempt to create one in the current working directory.
Most users maintain a master rtg.conf file customized for their envi‐
ronment. rtg.conf contains the following configurable fields:
Interval 300
HighSkewSlop 3.0
LowSkewSlop 0.5
OutOfRange 93750000000
SNMP_Ver 1
SNMP_Port 161
DB_Host localhost
DB_Database rtg
DB_User snmp
DB_Pass rtgdefault
Threads 5
Interval is the time between successive polls of the target list,
default is 300 seconds (5 minutes). HighSkewSlop defines the maximum
number of Intervals allowed between two consecutive poll values before
the time in seconds between said points is deemed too large to calcu‐
late a valid rate. With the default Interval and HighSkewSlop values,
that time would be 300 * 3 (15 minutes). LowSkewSlop defines the mini‐
mum number of Intervals alloweed between two consecutive poll values
before the time in seconds between said points is deemed two low to
calculate a valid rate. With the default Interval and LowSkewSlop val‐
ues, that time would be 300 * 0.5 (2.5 minutes). OutOfRange defines an
upper bound above which rtgpoll will never attempt an insert into the
database. OutOfRange should be a multiple of the maximum number of
bytes possible in the defined Interval for your highest speed link.
The default OutOfRange value will suffice in most installations.
SNMP_Ver specifies the SNMP version the poller will use. The number of
threads rtgpoll will use is defined in the variable Threads.
Variables in rtg.conf must match the names above exactly. Comments and
blank lines are allowed and the ordering of variables in rtg.conf does
not matter.
TARGET FILE
The target file specifies the objects to be SNMP polled. Comments must
be preceded with a '#' sign. Elements in the target file are tab
delimited. The format of the target file is fixed:
# Host OID 64/32 Community Table ID Description
where
Host = IP or hostname of target
OID = Full SNMP OID, e.g. .1.3.6.1.2.1.31.1.1.1.10.19
64/32/0 = Specify 64/32 bit objects or 0 for gauge objects
Community = SNMP Community
Table = MySQL table in the database to use
ID = A unique ID that is used with each insert
Description = Text
RTG can monitor OIDs that return a gauge value allowing one to monitor
items such as temperature, CPU, users, etc. If an entry in the target
file has 0 (zero) specified as the OID bit width instead of 64 or 32,
the poller assumes that it is monitoring a gauge and does not attempt
to calculate an interval delta value.
rtgpoll first reads the configuration file, then the target file. For
each SNMP poll, rtgpoll will attempt an SQL INSERT of the form:
INSERT INTO Table VALUES (ID, NOW(), bigint)
Where Table is the name of the database table and ID is an integer.
Both Table and ID come from the target list, NOW() is the current time‐
stamp and bigint is the delta value between successive SNMP polls.
SIGNALSrtgpoll accepts a number of signals. SIGHUP forces a reload of the
target file. If rtgpoll is actively polling, the target file is
reloaded when rtgpoll becomes idle. This is useful when automating the
target list creation based on your active network. SIGUSR1 increases
the verbosity of a running rtgpoll; SIGUSR2 decreases the verbosity.
SEE ALSOrtgplot(1)VERSION
This manual page documents rtgpoll version 0.7.4
AUTHOR
(c) 2002-2003 by Robert Beverly
Manual page for rtgpoll August 2003 rtgpoll(1)
