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18.4. 配置 Nagios

$ sudo vim /etc/nagios3/nagios.cfg

cfg_dir=/etc/nagios3/hosts
cfg_dir=/etc/nagios3/servers
cfg_dir=/etc/nagios3/switches
cfg_dir=/etc/nagios3/routers

admin_email=nagios, neo.chen@example.com
		

18.4.1. authorized

add user neo for nagios

$ sudo htpasswd /etc/nagios3/htpasswd.users neo
New password:
Re-type new password:
Adding password for user neo
			

# grep default_user_name cgi.cfg
#default_user_name=guest

# grep authorized cgi.cfg
authorized_for_system_information=nagiosadmin
authorized_for_configuration_information=nagiosadmin
authorized_for_system_commands=nagiosadmin
authorized_for_all_services=nagiosadmin
authorized_for_all_hosts=nagiosadmin
authorized_for_all_service_commands=nagiosadmin
authorized_for_all_host_commands=nagiosadmin
#authorized_for_read_only=user1,user2
			


$ sudo vim /etc/nagios3/cgi.cfg

authorized_for_all_services=nagiosadmin,neo
authorized_for_all_hosts=nagiosadmin,neo

			

18.4.2. contacts

$ sudo vim /etc/nagios3/conf.d/contacts_nagios2.cfg

###############################################################################
# contacts.cfg
###############################################################################

define contact{
        contact_name                    neo
        alias                           Neo
        service_notification_period     24x7
        host_notification_period        24x7
        service_notification_options    w,u,c,r
        host_notification_options       d,r
        service_notification_commands   notify-service-by-email
        host_notification_commands      notify-host-by-email
        email                           neo.chen@example.com
        }

###############################################################################
###############################################################################
#
# CONTACT GROUPS
#
###############################################################################
###############################################################################

# We only have one contact in this simple configuration file, so there is
# no need to create more than one contact group.

define contactgroup{
        contactgroup_name       admins
        alias                   Nagios Administrators
        members                 root, neo
        }

			

当服务出现w—报警(warning),u—未知(unkown),c—严重(critical),r—从异常恢复到正常,在这四种情况下通知联系人

当主机出现d-当机(down),u—返回不可达(unreachable),r—从异常情况恢复正常,在这3种情况下通知联系人

确认 contact_groups 已经设置

neo@monitor:/etc/nagios3$ grep admins conf.d/generic-host_nagios2.cfg
                contact_groups                  admins
neo@monitor:/etc/nagios3$ grep admins conf.d/generic-service_nagios2.cfg
                contact_groups                  admins
			

18.4.3. hostgroups

$ sudo vim /etc/nagios3/conf.d/hostgroups_nagios2.cfg

define hostgroup {
        hostgroup_name  mysql-servers
                alias           MySQL Servers
                members         *
        }

			

18.4.4. generic-service

$ cat /etc/nagios3/conf.d/generic-service_nagios2.cfg
# generic service template definition
define service{
        name                            generic-service ; The 'name' of this service template
        active_checks_enabled           1       ; Active service checks are enabled
        passive_checks_enabled          1       ; Passive service checks are enabled/accepted
        parallelize_check               1       ; Active service checks should be parallelized (disabling this can lead to major performance problems)
        obsess_over_service             1       ; We should obsess over this service (if necessary)
        check_freshness                 0       ; Default is to NOT check service 'freshness'
        notifications_enabled           1       ; Service notifications are enabled
        event_handler_enabled           1       ; Service event handler is enabled
        flap_detection_enabled          1       ; Flap detection is enabled
        failure_prediction_enabled      1       ; Failure prediction is enabled
        process_perf_data               1       ; Process performance data
        retain_status_information       1       ; Retain status information across program restarts
        retain_nonstatus_information    1       ; Retain non-status information across program restarts
                notification_interval           0               ; Only send notifications on status change by default.
                is_volatile                     0
                check_period                    24x7
                normal_check_interval           5
                retry_check_interval            1
                max_check_attempts              4
                notification_period             24x7
                notification_options            w,u,c,r
                contact_groups                  admins
        register                        0       ; DONT REGISTER THIS DEFINITION - ITS NOT A REAL SERVICE, JUST A TEMPLATE!
        }
			
  • notification_interval 报警发送间隔,单位分钟

  • normal_check_interval 间隔时间

  • retry_check_interval 重试间隔时间

  • max_check_attempts 检查次数,4次失败后报警

18.4.5. SOUND OPTIONS

发出警报声

			
$ sudo vim /etc/nagios3/cgi.cfg

# SOUND OPTIONS
# These options allow you to specify an optional audio file
# that should be played in your browser window when there are
# problems on the network.  The audio files are used only in
# the status CGI.  Only the sound for the most critical problem
# will be played.  Order of importance (higher to lower) is as
# follows: unreachable hosts, down hosts, critical services,
# warning services, and unknown services. If there are no
# visible problems, the sound file optionally specified by
# 'normal_sound' variable will be played.
#
#
# <varname>=<sound_file>
#
# Note: All audio files must be placed in the /media subdirectory
# under the HTML path (i.e. /usr/local/nagios/share/media/).

host_unreachable_sound=hostdown.wav
host_down_sound=hostdown.wav
service_critical_sound=critical.wav
service_warning_sound=warning.wav
service_unknown_sound=warning.wav
normal_sound=noproblem.wav
			
			

18.4.6. SMS 短信

vim /etc/nagios3/commands.cfg

# 'notify-host-by-sms' command definition
define command{
        command_name    notify-host-by-sms
        command_line    /srv/sms/sms $CONTACTPAGER$ "Host: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n"
        }

# 'notify-service-by-sms' command definition
define command{
        command_name    notify-service-by-sms
        command_line    /srv/sms/sms $CONTACTPAGER$ "Service: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$"
        }
			
sudo vim /etc/nagios3/conf.d/contacts_nagios2.cfg
define contact{
        contact_name                    neo
        alias                           Neo
        service_notification_period     24x7
        host_notification_period        24x7
        service_notification_options    w,u,c,r
        host_notification_options       d,r
        service_notification_commands   notify-service-by-email, notify-service-by-sms
        host_notification_commands      notify-host-by-email, notify-host-by-sms
        email                           neo.chen@example.com
        pager 							13113668899
        }

			

18.4.7. nrpe plugins

neo@monitor:/etc/nagios3/hosts$ sudo cat www.example.com.cfg

define host{
        use             generic-host            ; Inherit default values from a template
        host_name       www.example.com             ; The name we're giving to this host
        alias           Some Remote Host        ; A longer name associated with the host
        address         172.16.1.10              ; IP address of the host
        hostgroups      http-servers                    ; Host groups this host is associated with
        }

# NRPE disk check.
define service {
        use                             generic-service
        host_name                       www.example.com
        service_description             nrpe-disk
        check_command                   check_nrpe_1arg!check_all_disks!172.16.1.10
}
define service {
        use                             generic-service
        host_name                       www.example.com
        service_description             nrpe-users
        check_command                   check_nrpe_1arg!check_users!172.16.1.10
}
define service {
        use                             generic-service
        host_name                       www.example.com
        service_description             nrpe-swap
        check_command                   check_nrpe_1arg!check_swap!172.16.1.10
}
define service {
        use                             generic-service
        host_name                       www.example.com
        service_description             nrpe-procs
        check_command                   check_nrpe_1arg!check_total_procs!172.16.1.10
}
define service {
        use                             generic-service
        host_name                       www.example.com
        service_description             nrpe-load
        check_command                   check_nrpe_1arg!check_load!172.16.1.10
}
define service {
        use                             generic-service
        host_name                       www.example.com
        service_description             nrpe-zombie_procs
        check_command                   check_nrpe_1arg!check_zombie_procs!172.16.1.10
}

			
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