Nagios: Difference between revisions
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= Slack Notifications = |
= Slack Notifications = |
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{{UC}} |
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Refer: https://github.com/obaarne/Nagios2Slack/archive/master.zip |
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sudo nano /etc/nagios3/commands.cfg |
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<pre> |
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# 'notify-host-by-slack' command definition |
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define command { |
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command_name notify-host-by-slack |
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command_line /usr/local/bin/nagios_slack_host_alert.py -nt "$NOTIFICATIONTYPE$" -ha "$HOSTALIAS$" -hs "$HOSTSTATE$" -had "$HOSTADDRESS$" -ho "$HOSTOUTPUT$" |
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} |
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# 'notify-service-by-slack' command definition |
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define command { |
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command_name notify-service-by-slack |
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command_line /usr/local/bin/nagios_slack_service_alert.py -nt "$NOTIFICATIONTYPE$" -ha "$HOSTALIAS$" -sd "$SERVICEDESC$" -ss "$SERVICESTATE$" -had "$HOSTADDRESS$" |
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} |
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</pre> |
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sudo nano /etc/nagios3/conf.d/contacts_nagios2.cfg |
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<pre> |
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define contact{ |
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contact_name root |
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alias Root |
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service_notification_period 24x7 |
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host_notification_period 24x7 |
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service_notification_options w,u,c,r,f,s |
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host_notification_options d,u,r,f,s |
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service_notification_commands notify-service-by-slack |
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host_notification_commands notify-host-by-slack |
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email root@localhost |
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} |
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</pre> |
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sudo nano /usr/local/bin/nagios_slack_service_alert.py |
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sudo nano /usr/local/bin/nagios_slack_host_alert.py |
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sudo chown nagios:nagios /usr/local/bin/nagios_slack_service_alert.py |
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sudo chown nagios:nagios /usr/local/bin/nagios_slack_host_alert.py |
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sudo chmod +x /usr/local/bin/nagios_slack_service_alert.py |
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sudo chmod +x /usr/local/bin/nagios_slack_host_alert.py |
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Revision as of 19:05, 23 November 2018
Versions
[Nagios]------------[NRPE] Ubuntu CentOS Server (to be monitored)
Ubuntu 16.04.5 LTS Nagios Core 3.5.1 CentOS 7.5.1804 (Core) NRPE 3.2.1
Paths
Nagios Server
Path for config files:
ls /etc/nagios3/ nagios.cfg commands.cfg
Path for Devices config files:
ls /etc/nagios3/conf.d/ client01.cfg hostgroups.cfg services.cfg
Path for Monitor Plugins
ls /usr/lib/nagios/plugins/ check_procs check_http check_load check_users
Monitored Client
NRPE Config file:
ls /etc/nagios/ nrpe.cfg
Nagios Plugins:
/usr/lib64/nagios/plugins/ check_procs check_disk check_load check_users check_nrpe
Installation
Update System:
sudo apt update -y sudo apt upgrade -y
Install Dependencies:
sudo apt install php php-cgi libapache2-mod-php php-common php-pear php-mbstring apache2
Install Nagios3:
sudo apt install nagios3 nagios-plugins-basic nagios-nrpe-plugin
Edit Config:
sudo nano /etc/nagios3/nagios.cfg check_external_commands=1
Adding a Host
sudo nano /etc/nagios3/conf.d/aman-client1.cfg
define host { use generic-host ; Inherit default values from a template host_name PROD_aman-client1 ; The name we're giving to this host alias XYZ_aman-client1 ; A longer name associated with the host address 10.10.30.81 ; IP address of the host #hostgroups allhosts ; Host groups this host is associated with }
sudo service nagios3 restart
Hostgroup
This section is under construction. |
Monitoring python process
Checking output using cli
/usr/lib/nagios/plugins/check_procs -c 1: -C python3 -a watchdog.py
Add a Custom Command for monitoring local Python Script:
sudo nano /etc/nagios3/commands.cfg
################# # Check_Python ################# define command{ command_name check_python command_line /usr/lib/nagios/plugins/check_procs -c 1: -C '$ARG1$' -a '$ARG2$' }
Define a Service for monitoring local Python Script:
sudo nano /etc/nagios3/conf.d/aman-client1.cfg
## Check Watchdog Script define service { use generic-service ; Inherit default values from a template host_name localhost service_description Watchdog Script check_command check_python!python3!watchdog.py }
Monitor HTTP Site
Checking output using cli
/usr/lib/nagios/plugins/check_http -H localhost -u /aviwiki/index.php/Main_Page
Adding a Service for the above monitor
sudo nano /etc/nagios3/conf.d/aman-client1.cfg
## Check Mediawiki Site define service { use generic-service ; Inherit default values from a template host_name localhost service_description MediaWiki Server check_command check_http!-H localhost!-u /aviwiki/index.php/Main_Page }
NRPE
Installation on CentOS Client
Installation on Client:
yum install nrpe nagios-plugins yum install nagios-plugins-users nagios-plugins-load nagios-plugins-swap nagios-plugins-disk nagios-plugins-procs
Check Config File:
egrep -v '^#|^$' /etc/nagios/nrpe.cfg
Edit Config File:
sudo nano nrpe.cfg
dont_blame_nrpe=1 # Allow arguments allowed_hosts=127.0.0.1, <ip_of_nagios_server> # Permit nagios server to connect to this client
sudo systemctl restart nrpe
Verify Connection to NRPE from Nagios Server
/usr/lib/nagios/plugins/check_nrpe -H 192.168.1.11 NRPE v2.15
Installation on Ubuntu Client
This section is under construction. |
Configuration
On client to be monitored
Test the monitor command:
/usr/lib64/nagios/plugins/check_procs -c 1: -C 'python3.6' -a 'watchdog.py' -p
Add the custom command:
sudo nano /etc/nagios/nrpe.cfg command[check_watchdog]=/usr/lib64/nagios/plugins/check_procs -c 1: -C 'python3.6' -a 'watchdog.py' sudo systemctl restart nrpe
On Nagios Server
First test the above custom command:
/usr/lib/nagios/plugins/check_nrpe -H 10.10.30.81 -c check_watchdog
Add a Custom Monitor Command:
sudo nano /etc/nagios3/commands.cfg
############################################################################### # NRPE CHECK COMMAND # # Command to use NRPE to check remote host systems ############################################################################### define command{ command_name check_nrpe_args command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ }
Create a Service for the host:
sudo nano /etc/nagios3/conf.d/host01.cfg
## Check Watchdog Script define service { use generic-service ; Inherit default values from a template host_name PROD_aman-client1 service_description Watchdog Script check_command check_nrpe_args!check_watchdog
Slack Notifications
Refer: https://github.com/obaarne/Nagios2Slack/archive/master.zip
sudo nano /etc/nagios3/commands.cfg
# 'notify-host-by-slack' command definition define command { command_name notify-host-by-slack command_line /usr/local/bin/nagios_slack_host_alert.py -nt "$NOTIFICATIONTYPE$" -ha "$HOSTALIAS$" -hs "$HOSTSTATE$" -had "$HOSTADDRESS$" -ho "$HOSTOUTPUT$" } # 'notify-service-by-slack' command definition define command { command_name notify-service-by-slack command_line /usr/local/bin/nagios_slack_service_alert.py -nt "$NOTIFICATIONTYPE$" -ha "$HOSTALIAS$" -sd "$SERVICEDESC$" -ss "$SERVICESTATE$" -had "$HOSTADDRESS$" }
sudo nano /etc/nagios3/conf.d/contacts_nagios2.cfg
define contact{ contact_name root alias Root service_notification_period 24x7 host_notification_period 24x7 service_notification_options w,u,c,r,f,s host_notification_options d,u,r,f,s service_notification_commands notify-service-by-slack host_notification_commands notify-host-by-slack email root@localhost }
sudo nano /usr/local/bin/nagios_slack_service_alert.py
sudo nano /usr/local/bin/nagios_slack_host_alert.py
sudo chown nagios:nagios /usr/local/bin/nagios_slack_service_alert.py sudo chown nagios:nagios /usr/local/bin/nagios_slack_host_alert.py sudo chmod +x /usr/local/bin/nagios_slack_service_alert.py sudo chmod +x /usr/local/bin/nagios_slack_host_alert.py
- References
{{#widget:DISQUS
|id=networkm
|uniqid=Nagios
|url=https://aman.awiki.org/wiki/Nagios
}}