nagios4をdockerで動かしてメール通知

• jasonrivers/nagios
  • GitHub

設定

• ./objects/contacts.cfg
• ./conf.d/nw_office.cfg
• ./conf.d/custom-host.cfg

を作成する

./objects/contacts.cfg

define contact {
    contact_name            nagiosadmin             ; Short name of user
    use                     generic-contact         ; Inherit default values from generic-contact template (defined above)
    alias                   Nagios Admin            ; Full name of user
    email                   nagios@localhost ; <<***** CHANGE THIS TO YOUR EMAIL ADDRESS ******
}

define contactgroup {
    contactgroup_name       admins
    alias                   Nagios Administrators
    members                 nagiosadmin
}

• nagios@localhost を検知時受け取りたいメールアドレスに置換する。

./conf.d/nw_office.cfg

define host{
    use        custom-host
    host_name  host1
    address    192.168.0.4
}

define service{
    use                     generic-service
    service_description     check_ssh_host1
    host_name               host1
    check_command           check_ssh
    check_interval          1
}

• 監視の周期を短くするため以下作成

./conf.d/custom-host.cfg

define host{
	name                            custom-host
	notifications_enabled           1
	event_handler_enabled           1
	flap_detection_enabled          1
	#failure_prediction_enabled      1
	process_perf_data               1
	retain_status_information       1
	retain_nonstatus_information    1
	check_command                   check-host-alive
	max_check_attempts              2
	notification_interval           60
	notification_period             24x7
	notification_options            d,u,r
	contact_groups                  admins
	register                        0
}

起動

docker run \
 --name nagios4 \
 --restart=always \
 -p 0.0.0.0:8080:80 \
\
 -e MAIL_RELAY_HOST="リレーサーバー" \
 -e MAIL_INET_PROTOCOLS="ipv4" \
 -e NAGIOS_FQDN="FQDNを適当に設定" \
 -e NAGIOS_TIMEZONE="Asia/Tokyo" \
\
 -v /etc/localtime:/etc/localtime \
 -v $(pwd)/conf.d:/opt/nagios/etc/conf.d \
 -v $(pwd)/objects/contacts.cfg:/opt/nagios/etc/objects/contacts.cfg \
 jasonrivers/nagios:latest

• http://localhost:8080 にアクセス。

  • nagiosadmin / nagios

• swapが無くてcritical表示されるのが嫌な場合は、 objects/localhost.cfg を修正する。

実行コマンドの場所

• /opt/nagios/libexec/check_〜

グラフ表示

• graphed-service を付ける

 define service{
-   use                     generic-service
+   use                     generic-service,graphed-service
    service_description     check_ssh_host1
    host_name               host1
    check_command           check_ssh
    check_interval          1
 }