агент домена простых показателей производительности (PMDA) (simple performance metrics domain agent (PMDA))
Имя (Name)
pmdasimple - simple performance metrics domain agent (PMDA)
Синопсис (Synopsis)
$PCP_PMDAS_DIR/simple/pmdasimple [-d domain] [-i port] [-l
logfile] [-p] [-u socket] [-U username]
Описание (Description)
pmdasimple is a simple Performance Metrics Domain Agent (PMDA)
which exports a small number of synthetic performance metrics.
The simple PMDA is shipped as source code and is designed to be
an aid for PMDA developers. In terms of code size and features,
it is more complex than the trivial PMDA, about the same as the
txmon PMDA and less complex than the sample PMDA. The source for
the simple PMDA is a good template from which production,
customized PMDAs can be developed.
A brief description of the pmdasimple command line options
follows:
-d It is absolutely crucial that the performance metrics domain
number specified here is unique and consistent. That is,
domain should be different for every PMDA on the one host,
and the same domain number should be used for the same PMDA
on all hosts.
-i Expect PMCD to connect to pmdasimple on the specified TCP/IP
port. port may be a port number or port name.
-l Location of the log file. By default, a log file named
simple.log is written in the current directory of pmcd(1)
when pmdasimple is started, i.e. $PCP_LOG_DIR/pmcd. If the
log file cannot be created or is not writable, output is
written to the standard error instead.
-p Expect PMCD to create a pipe and the connection to
pmdasimple is via standard input and standard output. This
is the default connection mode.
-u Expect PMCD to connect to pmdasimple on the Unix domain
socket named socket.
-U User account under which to run the agent. The default is
the unprivileged "pcp" account in current versions of PCP,
but in older versions the superuser account ("root") was
used by default.
At most one of the options -i, -p and -u may be specified.
Установка (Installation)
If you want access the names, help text and values for the simple
performance metrics, do the following as root:
# cd $PCP_PMDAS_DIR/simple
# ./Install
If you want to undo the installation, do the following as root:
# cd $PCP_PMDAS_DIR/simple
# ./Remove
pmdasimple is launched by pmcd(1) and should never be executed
directly. The Install and Remove scripts notify pmcd(1) when the
agent is installed or removed.
Файлы (Files)
$PCP_PMCDCONF_PATH
command line options used to launch pmdasimple
$PCP_PMDAS_DIR/simple/help
default help text file for the simple metrics
$PCP_PMDAS_DIR/simple/Install
installation script for the pmdasimple agent
$PCP_PMDAS_DIR/simple/Remove
undo installation script for the pmdasimple agent
$PCP_PMDAS_DIR/simple/simple.conf
configuration file for the dynamic instance domain that
underlies the simple.now performance metric. For a
description, refer to the help text file, or run the
command
$ pminfo -T simple.now
$PCP_PMDAS_DIR/simple/*.pmda_simple.so
The DSO version of the PMDA. The same source is used to
create both the DSO and the daemon versions of the simple
PMDA, and one or the other may be installed as part of the
dialog in the Install script.
$PCP_LOG_DIR/pmcd/simple.log
default log file for error messages and other information
from pmdasimple
Окружение PCP (PCP environment)
Environment variables with the prefix PCP_ are used to
parameterize the file and directory names used by PCP. On each
installation, the file /etc/pcp.conf contains the local values
for these variables. The $PCP_CONF variable may be used to
specify an alternative configuration file, as described in
pcp.conf(5).
Смотри также (See also)
PCPIntro(1), pmcd(1), pmdasample(1), pmdatrivial(1),
pmdatxmon(1), PMDA(3), pcp.conf(5) and pcp.env(5).
