Nagios Support Forum

Hello @hbouma

Thanks for sending the info over, what do you get when you send it via email event handler? Here is a raw example from 'sendmail':

--b1_c8db6785341588857ce41a6c635c1852
Content-Type: text/html; charset=us-ascii

***** Nagios XI Alert *****<br />
<br />
Nagios has detected a problem with this service.<br />
<br />
Notification Type: PROBLEM<br />
<br />
Service: Plugin check_files.ps1<br />
Host: xxx.xxx.xxx.xxx<br />
Address: xxx.xxx.xxx.xxx<br />
State: CRITICAL<br />
Info:<br />
Files modified in the last 9999 minutes. Files are:<br />
Date/Time: 2021-10-25 15:48:41<br />
<br />
Respond: http://xxx.xxx.xxx.xxx/nagiosxi/rr.php? ... 1851b31<br />
Nagios URL: http://xxx.xxx.xxx.xxx/nagiosxi/<br />
Add: C:\temp\New Text Document (4) - Copy - Copy.txt\nC:\temp\this_is_new_file - Copy (2).txt\nC:\temp\this_is_new_file - Copy (3).txt\nC:\temp\this_is_new_file - Copy (4).txt\nC:\temp\this_is_new_file - Copy.txt\nC:\temp\this_is_new_file.txt\n\n\t<br />

Thanks,
Perry

Things did not turn out as expected. I have sent you a PM.

Hello @hbouma

Which event_handler did you select for the 'check_files' Event Handler pull-down list?[

Example that I utilized for testing:

xi_service_event_handler /usr/bin/php /usr/local/nagiosxi/scripts/handle_nagioscore_event.php --handler-type=service --host="$HOSTNAME$" --service="$SERVICEDESC$" --hostaddress="$HOSTADDRESS$" --hoststate=$HOSTSTATE$ --hoststateid=$HOSTSTATEID$ --hosteventid=$HOSTEVENTID$ --hostproblemid=$HOSTPROBLEMID$ --servicestate=$SERVICESTATE$ --servicestateid=$SERVICESTATEID$ --lastservicestate=$LASTSERVICESTATE$ --lastservicestateid=$LASTSERVICESTATEID$ --servicestatetype=$SERVICESTATETYPE$ --currentattempt=$SERVICEATTEMPT$ --maxattempts=$MAXSERVICEATTEMPTS$ --serviceeventid=$SERVICEEVENTID$ --serviceproblemid=$SERVICEPROBLEMID$ --serviceoutput="$SERVICEOUTPUT$" --longserviceoutput="$LONGSERVICEOUTPUT$" --servicedowntime=$SERVICEDOWNTIME$

Please verify that the line '--longserviceoutput="$LONGSERVICEOUTPUT$"' correlates with that Event Handler associated with the check_files service check.

Thanks,
Perry

I think there is some confusion here. The Event Handler is never used to send the emails, and the problem we are having is with emails sent by Nagios XI.

To answer your question, I created a new command by cloning the notify-service-by-email check and altering the clone to have the following command:

/usr/bin/printf "%b" "***** Nagios Monitor XI Alert *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\n Info:\n\n$SERVICEOUTPUT$ Additional line2Info: \n$LONGSERVICEOUTPUT$" | /bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ $LONGDATETIME$ **" $CONTACTS$

I will send you an PM with a manual run of this command and the email I receive.

Hello @hbouma

Thanks for following up with the PM.

Here are the following can be used for formating:

• \r represents the carriage return
• \n the newline (linefeed)
• \t for tab

I tested with \r\n; to initate carriage return and follow up with newline.

Thanks,
Perry

PM sent

Hello @hbouma

Thanks for following up, in looking into the email formating the 'sendmail' is using the postfix backend. There are some options or aka mta alternatives that we can set.

alternatives --config mta

There is 1 program that provides 'mta'.

Selection Command
-----------------------------------------------
*+ 1 /usr/sbin/sendmail.postfix
2 /usr/sbin/sendmail.ssmtp

Please test email formatting for your 'check_files' service check.

Thanks,
Perry

hbouma wrote:Subject: Email of multiline output

pbroste wrote:Hello @hbouma

Thanks for following up with the PM.

Here are the following can be used for formating:

• \r represents the carriage return
• \n the newline (linefeed)
• \t for tab

I tested with \r\n; to initate carriage return and follow up with newline.

Thanks,
Perry

Command being sent using \n and \r for new line.

Email output.

ATT00001.txt

FYI, the \f in the path is actually turning into ASCII character 12 in the email message.

I am curious, is Nagios using /bin/mail when it sends the mail? We are not sending the mail ourselves with any special characters being selected by us. Instead, we are using the default notifications built into Nagios XI.

We only have the postfix sendmail option.


$ alternatives --config mta

There is 1 program that provides 'mta'.

Selection Command
-----------------------------------------------
*+ 1 /usr/sbin/sendmail.postfix

Enter to keep the current selection[+], or type selection number:

Hello @hbouma

I will do further testing on this to see if there are any workarounds and follow up. It does appear that we are limited on formatting options available for postfix.

Regards,
Perry

pbroste wrote:Hello @hbouma

I will do further testing on this to see if there are any workarounds and follow up. It does appear that we are limited on formatting options available for postfix.

Regards,
Perry

Hi, I just wanted to followup on this and see if anything was found.