Normally you would probably want to use a separate tool for monitoring, independent of the load balancing system, that would notify you for failures.
This would allow you to health check the different back end servers, as well as the combined high availablity service that's offered by haproxy. You might want to consider nagios or zenoss. There are a multitude of other open and closed source monitoring options that could be considered. -JohnF > -----Original Message----- > From: Dawid Sieradzki / Gadu-Gadu [mailto:[email protected]] > Sent: January 8, 2009 8:55 AM > To: surachet ch.; [email protected] > Subject: Re: e-mail alert if backend down > > >HI , HAProxy users. > >i use haproxy for loadbalance backend pool , only status > page let i know > >which backend go down. > >anybody can help me to solve the way for haproxy alert when > backend going > >down by e-mail. > > You can try this: > 1. Create backend for stats for example like that: > > backend back_statystyki > mode http > stats uri / > stats refresh 5s > > balance roundrobin > 2. write (for example perl) script witch will make > connections every 1 min. > (cron) to the http://lb-address/your_stats;csv > You will get stats in csv format. Save "backend status" (it > is time how > long backend is UP) to file. > > next campare status before and after, and send notifi via > e-mail if there > was reset. > > > > > -- > > Dawid Sieradzki > Infrastruktura, Administrator > > Gadu-Gadu S.A. http://www.gadu-gadu.pl > Al. Stanów Zjednoczonych 61 04-028 Warszawa > tel.: +48 22 5146499 wew 79 fax.: +48 22 5146498 gg:16200 > > Spółka zarejestrowana w Sądzie Rejonowym dla m. st. Warszawy, XIII > Wydział Gospodarczy KRS pod numerem 0000264575, NIP 867-19-48-977. > Kapitał zakładowy: 1 758 461,10 zł - wpłacony w całości. > > >
