Re: Error messages for postfix monitor

[Noel]

The most likely explanation is that all the postfix smtpd processes
are busy, in which case the solution is to configure more processes. 

Another possibility is that your DNS is occasionally having delays
-- either finding the IP for [localhost] or finding the hostname
that goes with the IP.  The first problem can be easily avoided by
using 127.0.0.1 rather than localhost.


  -- Noel Jones


On 5/11/2012 3:20 PM, Martin Pala wrote:
> Hello,
>
> it seems that there are sporadic errors and postfix doesn't respond fast 
> enough. If the situation is expected, you can set monit to alert only when 
> the error is more solid (few consecutive cycles):
>
>       if failed port 25 type tcp protocol smtp with timeout 15 seconds for 3 
> cycles then alert
>
> Regards,
> Martin
>
>
> On May 11, 2012, at 5:05 PM, Alexandre Carlos Vilarinho de Oliveira wrote:
>
>> Hello all,
>>  
>> I’m using monit to monit postfix services, but constantly I’m receiving 
>> alert messages that it cannot connect to postfix smtp port 25, as you can 
>> see the log message below.
>>  
>> failed protocol test [SMTP] at INET[localhost:25] via TCP -- SMTP: error 
>> receiving data -- Resource temporarily unavailable
>>  
>> connection succeeded to INET[localhost:25] via TCP
>>  
>> Is this normal? Why does it happen?
>>  
>> Follow the recent conf to monit postfix.
>>  
>> # postfix
>> check process postfix with pidfile /var/spool/postfix/pid/master.pid
>>     group mail
>>     start program = "/etc/init.d/postfix start"
>>     stop program  = "/etc/init.d/postfix stop"
>>     if cpu > 60% for 2 cycles then alert
>>     if cpu > 80% for 5 cycles then restart
>>     if totalmem > 200.0 MB for 5 cycles then restart
>>     if children > 250 then restart
>>     if loadavg(5min) greater than 10 for 8 cycles then stop
>>     if failed port 25 type tcp protocol smtp
>>        with timeout 15 seconds then alert
>>     if 3 restarts within 5 cycles then timeout
>>        depends on postfix_rc
>>  
>>  check file postfix_rc with path /etc/init.d/postfix
>>    group mail
>>    if failed checksum then unmonitor
>>    if failed permission 755 then unmonitor
>>    if failed uid root then unmonitor
>>    if failed gid root then unmonitor
>>  
>> Am I doing something wrong? I’ve base it on Monit’s wiki website conf.
>>  
>> Atenciosamente
>>
>> Alexandre Vilarinho 
>> Gerente de Engenharia de Rede IP/TI 
>> Tel.: (55 11) 3017-4683
>> Cel.: (55 11) 7757-8388
>> Fax: (55 11) 3017-4464
>> address@hidden 
>> www.neovia.com.br 
>> ----------------------------
>>
>>  
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