агент домена показателей производительности докеров (PMDA) (docker performance metrics domain agent (PMDA))
Имя (Name)
pmdadocker - docker performance metrics domain agent (PMDA)
Синопсис (Synopsis)
$PCP_PMDAS_DIR/pmdadocker [-d domain] [-l logfile]
Описание (Description)
pmdadocker is a docker Performance Metrics Domain Agent (PMDA)
which exposes performance metrics as reported from the Docker
Remote API.
A brief description of the pmdadocker 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.
-l Location of the log file. By default, a log file named
docker.log is written in the current directory of pmcd(1)
when pmdadocker is started, i.e. $PCP_LOG_DIR/pmcd. If the
log file cannot be created or is not writable, output is
written to the standard error instead.
Remote API metric requests are activated automatically and are
fetched on a timer. This timer is represented as a by pmdadocker
via the docker.control.timing. By default, pmdadocker will be
set to fetch on a 1 second interval.
pmdadocker will iterate over three different docker remote API
calls:
/containers/$ID/json
Container metrics regarding the current state of the
container. Such as PID, name or if the container is
running.
/version
Basic version metrics about the current docker deamon in
use.
/containers/$ID/stats?stream=0
More in depth memory and cpu metrics of the container.
Установка (Installation)
If you want access to the names, help text and values for the
docker performance metrics, do the following as root:
# cd $PCP_PMDAS_DIR/docker
# ./Install
If you want to undo the installation (and remove both PMDAs), do
the following as root:
# cd $PCP_PMDAS_DIR/docker
# ./Remove
pmdadocker 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 pmdadocker
$PCP_PMDAS_DIR/docker/help
default help text file for the docker metrics
$PCP_PMDAS_DIR/docker/Install
installation script for the pmdadocker agent
$PCP_PMDAS_DIR/docker/Remove
undo installation script for the pmdadocker agent
$PCP_LOG_DIR/pmcd/docker.log
default log file for error messages and other information
from pmdadocker
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). In particular, the $PCP_DOCKER_DIR may be set to
change the default directory from /var/lib/docker.
Смотри также (See also)
PCPIntro(1), pmcd(1), pcp.conf(5), pcp.env(5) and docker(1).
