Send email alerts from Nagios

Nagiosで監視している機器がしきい値を超えてアラートが発生した場合に管理者にメールを通知する設定を行いました

Nagios
http://www.nagios.org/

• contacts.cfgの編集

設定ファイルの”/usr/local/nagios/etc/objects/contacts.cfg”を編集します
nagiosadmin@localhostの部分を実際の管理者のアドレスに変更します。

; html-script: false ] ############################################################################### # CONTACTS.CFG - SAMPLE CONTACT/CONTACTGROUP DEFINITIONS # # Last Modified: 05-31-2007 # # NOTES: This config file provides you with some example contact and contact # group definitions that you can reference in host and service # definitions. # # You don't need to keep these definitions in a separate file from your # other object definitions. This has been done just to make things # easier to understand. # ############################################################################### ############################################################################### ############################################################################### # # CONTACTS # ############################################################################### ############################################################################### # Just one contact defined by default - the Nagios admin (that's you) # This contact definition inherits a lot of default values from the 'generic-contact' # template which is defined elsewhere. 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 nagiosadmin@localhost ; << ***** CHANGE THIS TO YOUR EMAIL ADDRESS ****** } ############################################################################### ############################################################################### # # 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 nagiosadmin }

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; html-script: false ] ############################################################################### # CONTACTS.CFG - SAMPLE CONTACT/CONTACTGROUP DEFINITIONS # # Last Modified: 05-31-2007 # # NOTES: This config file provides you with some example contact and contact #        group definitions that you can reference in host and service #        definitions. # #        You don't need to keep these definitions in a separate file from your #        other object definitions.  This has been done just to make things #        easier to understand. # ###############################################################################   ############################################################################### ############################################################################### # # CONTACTS # ############################################################################### ###############################################################################   # Just one contact defined by default - the Nagios admin (that's you) # This contact definition inherits a lot of default values from the 'generic-contact' # template which is defined elsewhere.   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                           nagiosadmin@localhost   ; << ***** CHANGE THIS TO YOUR EMAIL ADDRESS ******         }   ############################################################################### ############################################################################### # # 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                 nagiosadmin         }

メールアドレスの設定としてはこの部分ですが、ただし使用するSMTPサーバはlocalhostになっています。その部分は下記のファイルに記述されています

• /usr/local/nagios/etc/objects/commands.cfg
; html-script: false ]################################################################################ # # 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" | /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" | /bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$ }

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; html-script: false ]################################################################################ # # 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" | /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" | /bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$         }

サンプルでは/bin/mailを使用してアラートメールを送信するようになっていますので、他のSMTPサーバを使用する場合はここの記述を変更する必要があります

この状態でアラートが発生すると下記のようなメールが管理者に届きます