Nagios Linux Host SSH

Nagios Server

SSH Key Paar erstellen

• docker exec -it nagios_nagios_1 /bin/bash

root@2a778a71f039:/# su -s /bin/bash nagios
root@2a778a71f039:/# ssh-keygen -N  -f  /opt/nagios/etc/id_rsa

Nagios Client

Nagios Plugins installieren

• apt install nagios-plugins

User anlegen und andere Dinge

• useradd -m -s /bin/bash nagios
• su - nagios
• mkdir .ssh
• nano .ssh/authorized_keys

Nun den Inhalt der Datei /opt/nagios/etc/id_rsa.pub an .ssh/authorized_keys anfügen und abspeichern

Nagios Server

Nun vom Server aus die Vebindung testen

per ssh

root@2a778a71f039:/# ssh -i /opt/nagios/etc/id_rsa nagios@10.0.10.202

per check_by_ssh Plugin

• root@2a778a71f039:/# /opt/nagios/libexec/check_by_ssh -H 10.0.10.202 -C "/usr/lib/nagios/plugins/check_disk -w 10% -c 5% -p /"

DISK OK - free space: / 19078 MB (80% inode=94%);| /=4692MB;22560;23813;0;2506

Raus aus dem Container

• exit
• exit

Konfiguration

define command {
        command_name    check_ssh_disk
        command_line    /opt/nagios/libexec/check_by_ssh  -H $HOSTADDRESS$ -o -o StrictHostKeyChecking=no -i /opt/nagios/etc/id_rsa -C "/usr/lib/nagios/plugins/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$"
}

define service{
        host_name               ubuntu20-2
        service_description     check-FS
        check_command           check_ssh_disk!10%!5%!/
        use  generic-service
        }

define host{
        use             linux-server
        host_name       ubuntu20-2
        alias           ubuntu20-2
        address         10.0.10.202
        }

Neu starten

• docker-compose down ; docker-compose up -d