[Blue-devel] [blue - Developers] RE: NRPE in Blue

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https://sourceforge.net/forum/message.php?msg_id=4216461
By: rob_blake

All,

As discussed on the mailing list, there is now an initial version of an NRPE-esque
daemon checked in. It is part of the Blue Agent code and can be started either
as an individual service on the remote host, or can be used in conjunction with
dynamic registration to allow for execution of plugins on dynamically registered
hosts.

NRPE in Blue follows the same stance as NRPE in Nagios. The first of the components
is a plugin called check_remote. The plugin has the following options:

-H  = remote host to check
-P  = Port of remote host to connect to.
-C  = Name of check to execute
-T  = transport to use to connect to remote host (currently socket only)
args = anything further is assumed to be args to the remote check.

The plugin is executed as with any other in blue, java -jar check-remote.jar
and command defintions within Blue should be reflective of their distributed
nature i.e.

define command{
 command_name   check_remote_time
 command_line   java -jar blue-check-remote.jar -H $HOSTADDRESS$ -C
check_remote_time
}

With regards to how the command is configured on the remote host, currently
it makes use of the configuration files that are associated with the Blue Agent.
The configuration of commands is in the following format:

command[check_remote_time]=java -jar blue-check-local-time.jar -H europe.pool.ntp.org
-w 30 -c 50

when receiving a request to execute a command, the agent will consult it's list
of pre-registered commands and then execute them accordingly.

The user also has the ability to pass command arguments to the remote command,
so the above command definition could be refactored as follows:

command[check_remote_time]=java -jar blue-check-local-time.jar -H $ARG1$ -w
$ARG2$ -c $ARG3$.

For this to work, the user must enabled allow_command_arguments in the configuration
file of the Blue Agent.

Rob


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