nagios how to monitor remote host by shell scripts?

Question

Do not install nrpe, but want in the Nagios control server writing shell scripts to control the remote host,like a process, the database state. can achieve? How to write the script?

Answer 1

An alternative to nrpe is to use the [check_by_ssh][1] plugin. It will connect via SSH and execute the specified plugin (or script).

Example for the check_free_mem plugin

define command{
    command_name    check_ssh_mem
    command_line    $USER1$/check_by_ssh -H $HOSTADDRESS$ -C "$USER1$/check_free_mem -w $ARG1$ -c $ARG2$"
}