CentOS 7.x nagios server and client configuration ansible playbook
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Home > CentOS > CentOS 7.x > Monitoring > Nagios > CentOS 7.x nagios server and client configuration ansible playbook
To configure nagios server and client use below playbook:
---
- name: Playbook for configuring nagios client(s)
hosts: nagios-client
remote_user: root
vars:
nagios_server: 192.168.<yambe:breadcrumb self="CentOS 7.x nagios server and client configuration ansible playbook">CentOS 7.x nagios|CentOS 7.x nagios</yambe:breadcrumb>122.147
tasks:
- name: Install epel-release repository
yum: name=epel-release state=present
- name: Install nrpe, nagios-plugins-all
yum: name={{item}} state=present
with_items:
- nrpe
- nagios-plugins-all
- openssl
- name: Configure nagios server IP in nrpe configuration file
lineinfile:
dest: /etc/nagios/nrpe.cfg
regexp: allowed_hosts=
line: allowed_hosts=127.0.0.1,{{nagios_server}}
- name: Start nrpe service and enable it on startup
service: name=nrpe state=restarted enabled=yes
- name: Playbook for configuring nagios server including clients and client services monitoring
hosts: nagios-server
remote_user: root
vars:
nagios_alert_email_id: barjatiya.saurabh@gmail.com
nagiosadmin_password: nagiosadmin
nagios_client_details:
- { hostname: "test1", alias: "test1", address: 192.168.122.210, services: [ "ping", "ssh" ] }
- { hostname: "web1", alias: "web1", address: 192.168.122.246, services: [ "ping", "ssh", "http", "nrpe_check_load" ] }
- { hostname: "windows10", alias: "windows10", address: 192.168.2.32, services: [ "ping", "nrpe_alias_cpu" ] }
tasks:
- name: Install epel-release repository
yum: name=epel-release state=present
- name: Install nagios, nagios-plugins-all and nrpe packages
yum: name={{item}} state=present
with_items:
- nagios
- nagios-plugins-all
- nrpe
- nagios-plugins-nrpe
- name: Configure desried email ID in contacts
lineinfile:
dest: /etc/nagios/objects/contacts.cfg
regexp: email
line: email {{nagios_alert_email_id}}
- name: Copy commands.cfg file with check_nrpe command
copy: src=commands.cfg dest=/etc/nagios/objects/commands.cfg owner=nagios group=nagios mode=755
- name: Create nagiosadmin user for httpd access
shell: htpasswd -cb /etc/nagios/passwd nagiosadmin {{nagiosadmin_password}}
- name: Make sure httpd is installed
yum: name=httpd state=present
- name: Start nagios, httpd services and enable them on startup
service: name={{item}} state=restarted enabled=yes
with_items:
- httpd
- nagios
- name: Set setuid permissions on /usr/bin/ping to allow nagios user to execute ping
file: dest=/usr/bin/ping mode=04755
- name: Configure nagios to use clients.conf file
lineinfile:
dest: /etc/nagios/nagios.cfg
insertafter: cfg_dir=.etc.nagios.conf.d
line: cfg_file=/etc/nagios/servers/clients.conf
- name: Create servers folder
file: dest=/etc/nagios/servers owner=nagios group=nagios mode=755 state=directory
- name: Configure server to monitor clients
template: src=nagios-clients.j2 dest=/etc/nagios/servers/clients.conf owner=nagios group=nagios mode=755
- name: Restart nagios on server to use new configuration
service: name=nagios state=restarted
The playbook requires 'commands.cfg' with following contents:
###############################################################################
# COMMANDS.CFG - SAMPLE COMMAND DEFINITIONS FOR NAGIOS 4.0.8
#
#
# NOTES: This config file provides you with some example command definitions
# that you can reference in host, service, and contact definitions.
#
# You don't need to keep commands in a separate file from your other
# object definitions. This has been done just to make things easier to
# understand.
#
###############################################################################
################################################################################
#
# SAMPLE NOTIFICATION COMMANDS
#
# These are some example notification commands. They may or may not work on
# your system without modification. As an example, some systems will require
# you to use "/usr/bin/mailx" instead of "/usr/bin/mail" in the commands below.
#
################################################################################
# 'notify-host-by-email' command definition
define command{
command_name notify-host-by-email
command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /usr/bin/mail -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" $CONTACTEMAIL$
}
# 'notify-service-by-email' command definition
define command{
command_name notify-service-by-email
command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$\n" | /usr/bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$
}
################################################################################
#
# SAMPLE HOST CHECK COMMANDS
#
################################################################################
# This command checks to see if a host is "alive" by pinging it
# The check must result in a 100% packet loss or 5 second (5000ms) round trip
# average time to produce a critical error.
# Note: Five ICMP echo packets are sent (determined by the '-p 5' argument)
# 'check-host-alive' command definition
define command{
command_name check-host-alive
command_line $USER1$/check_ping -H $HOSTADDRESS$ -w 3000.0,80% -c 5000.0,100% -p 5
}
################################################################################
#
# SAMPLE SERVICE CHECK COMMANDS
#
# These are some example service check commands. They may or may not work on
# your system, as they must be modified for your plugins. See the HTML
# documentation on the plugins for examples of how to configure command definitions.
#
# NOTE: The following 'check_local_...' functions are designed to monitor
# various metrics on the host that Nagios is running on (i.e. this one).
################################################################################
# 'check_local_disk' command definition
define command{
command_name check_local_disk
command_line $USER1$/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$
}
# 'check_local_load' command definition
define command{
command_name check_local_load
command_line $USER1$/check_load -w $ARG1$ -c $ARG2$
}
# 'check_local_procs' command definition
define command{
command_name check_local_procs
command_line $USER1$/check_procs -w $ARG1$ -c $ARG2$ -s $ARG3$
}
# 'check_local_users' command definition
define command{
command_name check_local_users
command_line $USER1$/check_users -w $ARG1$ -c $ARG2$
}
# 'check_local_swap' command definition
define command{
command_name check_local_swap
command_line $USER1$/check_swap -w $ARG1$ -c $ARG2$
}
# 'check_local_mrtgtraf' command definition
define command{
command_name check_local_mrtgtraf
command_line $USER1$/check_mrtgtraf -F $ARG1$ -a $ARG2$ -w $ARG3$ -c $ARG4$ -e $ARG5$
}
################################################################################
# NOTE: The following 'check_...' commands are used to monitor services on
# both local and remote hosts.
################################################################################
# 'check_ftp' command definition
define command{
command_name check_ftp
command_line $USER1$/check_ftp -H $HOSTADDRESS$ $ARG1$
}
# 'check_hpjd' command definition
define command{
command_name check_hpjd
command_line $USER1$/check_hpjd -H $HOSTADDRESS$ $ARG1$
}
# 'check_snmp' command definition
define command{
command_name check_snmp
command_line $USER1$/check_snmp -H $HOSTADDRESS$ $ARG1$
}
# 'check_http' command definition
define command{
command_name check_http
command_line $USER1$/check_http -I $HOSTADDRESS$ $ARG1$
}
# 'check_ssh' command definition
define command{
command_name check_ssh
command_line $USER1$/check_ssh $ARG1$ $HOSTADDRESS$
}
# 'check_dhcp' command definition
define command{
command_name check_dhcp
command_line $USER1$/check_dhcp $ARG1$
}
# 'check_ping' command definition
define command{
command_name check_ping
command_line $USER1$/check_ping -H $HOSTADDRESS$ -w $ARG1$ -c $ARG2$ -p 5
}
# 'check_pop' command definition
define command{
command_name check_pop
command_line $USER1$/check_pop -H $HOSTADDRESS$ $ARG1$
}
# 'check_imap' command definition
define command{
command_name check_imap
command_line $USER1$/check_imap -H $HOSTADDRESS$ $ARG1$
}
# 'check_smtp' command definition
define command{
command_name check_smtp
command_line $USER1$/check_smtp -H $HOSTADDRESS$ $ARG1$
}
# 'check_tcp' command definition
define command{
command_name check_tcp
command_line $USER1$/check_tcp -H $HOSTADDRESS$ -p $ARG1$ $ARG2$
}
# 'check_udp' command definition
define command{
command_name check_udp
command_line $USER1$/check_udp -H $HOSTADDRESS$ -p $ARG1$ $ARG2$
}
# 'check_nt' command definition
define command{
command_name check_nt
command_line $USER1$/check_nt -H $HOSTADDRESS$ -p 12489 -v $ARG1$ $ARG2$
}
################################################################################
#
# SAMPLE PERFORMANCE DATA COMMANDS
#
# These are sample performance data commands that can be used to send performance
# data output to two text files (one for hosts, another for services). If you
# plan on simply writing performance data out to a file, consider using the
# host_perfdata_file and service_perfdata_file options in the main config file.
#
################################################################################
# 'process-host-perfdata' command definition
define command{
command_name process-host-perfdata
command_line /usr/bin/printf "%b" "$LASTHOSTCHECK$\t$HOSTNAME$\t$HOSTSTATE$\t$HOSTATTEMPT$\t$HOSTSTATETYPE$\t$HOSTEXECUTIONTIME$\t$HOSTOUTPUT$\t$HOSTPERFDATA$\n" >> /var/log/nagios/host-perfdata.out
}
# 'process-service-perfdata' command definition
define command{
command_name process-service-perfdata
command_line /usr/bin/printf "%b" "$LASTSERVICECHECK$\t$HOSTNAME$\t$SERVICEDESC$\t$SERVICESTATE$\t$SERVICEATTEMPT$\t$SERVICESTATETYPE$\t$SERVICEEXECUTIONTIME$\t$SERVICELATENCY$\t$SERVICEOUTPUT$\t$SERVICEPERFDATA$\n" >> /var/log/nagios/service-perfdata.out
}
define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
The playbook also requires 'nagios-clients.j2' jinja2 script with following contents:
{% for nagios_client1 in nagios_client_details %}
define host{
use linux-server
host_name {{nagios_client1.hostname}}
alias {{nagios_client1.alias}}
address {{nagios_client1.address}}
max_check_attempts 5
check_period 24x7
notification_interval 30
notification_period 24x7
}
{% for service1 in nagios_client1.services %}
{% if service1=="ping" %}
define service{
use generic-service ; Name of service template to use
host_name {{nagios_client1.hostname}}
service_description PING
check_command check_ping!100.0,20%!500.0,60%
notifications_enabled 1
}
{% endif %}
{% if service1=="ssh" %}
define service {
use generic-service
host_name {{nagios_client1.hostname}}
service_description SSH
check_command check_ssh
notifications_enabled 1
}
{% endif %}
{% if service1=="http" %}
define service {
use generic-service
host_name {{nagios_client1.hostname}}
service_description HTTP
check_command check_http
notifications_enabled 1
}
{% endif %}
{% if service1=="nrpe_check_load" %}
define service {
use generic-service
host_name {{nagios_client1.hostname}}
service_description CPU Load
check_command check_nrpe!check_load
notifications_enabled 1
}
{% endif %}
{% if service1=="nrpe_alias_cpu" %}
define service {
use generic-service
host_name {{nagios_client1.hostname}}
service_description CPU Load
check_command check_nrpe!alias_cpu
notifications_enabled 1
}
{% endif %}
{% endfor %}
{% endfor %}
To run the playbook hosts file similar to one shown below is required:
[nagios-server] 192.168.122.147 [nagios-client] 192.168.122.210 192.168.122.246
Home > CentOS > CentOS 7.x > DevOps > Automated Configuration > Ansible > Ansible Playbooks > CentOS 7.x nagios server and client configuration ansible playbook
Home > CentOS > CentOS 7.x > Monitoring > Nagios > CentOS 7.x nagios server and client configuration ansible playbook
