Your script prints the http response code to standard output - but monit checks
only the exist status, not the output.
You need to modify the script to return the http code like this:
--8<--
#!/bin/bash
exit `curl -sL -w "%{http_code}\\n" "http://www.mysite.com"; -o /dev/null`
--8<--
On Nov 8, 2012, at 12:57 PM, "Houssan A. Hijazi" <[email protected]> wrote:
> Hi,
>
>
> my monit configuration:
>
> check program webserverresponse with path /home/myhome/webserver_response.sh
> if status == 502 then exec "/etc/init.d/nginx restart"
> if status == 502 then alert
> depends on nginx
>
> webserver_response.sh content:
>
> #!/bin/bash
> curl -sL -w "%{http_code}\\n" "http://www.mysite.com"; -o /dev/null
> exit $?
>
> output:
> user@ps90700:~$ ./webserver_response.sh
> 502
> --
> user@ps90700:~$ ./webserver_response.sh echo $?
> 502
>
> and in log file:
>
> [PST Nov 8 03:53:29] debug : 'webserverresponse' status check succeeded
>
> thanks, Martin
>
>
>
>
>
>
> 2012/11/8 Martin Pala <[email protected]>
> It seems that the test script doesn't return the 502 then.
>
> Can you provide output of this?:
> --8<--
> /home/myhome/webserver_response.sh
> echo $?
> --8<--
>
>
>
> On Nov 6, 2012, at 12:55 PM, Houssan A. Hijazi <[email protected]> wrote:
>
>> Hi,
>>
>> in a logs i have always:
>>
>> [PST Nov 6 03:53:13] debug : 'nginx' zombie check succeeded
>> [status_flag=0000]
>> [PST Nov 6 03:53:13] debug : 'nginx' succeeded connecting to
>> INET[www.mysite.org:80] via TCP
>> [PST Nov 6 03:53:13] debug : 'nginx' succeeded testing protocol [HTTP]
>> at INET[www.mysite.org:80] via TCP
>> [PST Nov 6 03:53:13] debug : 'webserverresponse' status check succeeded
>>
>> is always succeded the status of webserverresponse. My configuration are ok?
>>
>>
>> Thanks
>> 2012/11/6 Martin Pala <[email protected]>
>> Hi,
>>
>> can you run monit in debug mode ("-v" option) and check the logs?
>>
>> Regards,
>> Martin
>>
>>
>> On Nov 5, 2012, at 6:09 PM, Houssan A. Hijazi <[email protected]> wrote:
>>
>>> Hi,
>>>
>>> my config file:
>>>
>>> check process nginx
>>> with pidfile /dh/nginx/servers/httpd-ps93737/var/logs/nginx.pid #Pid file
>>> for nginx in my case it located in /opt/nginx/logs/
>>> start program = "/etc/init.d/nginx start"
>>> stop program = "/etc/init.d/nginx stop"
>>> if failed host www.mysite.com port 80 protocol HTTP then restart #set
>>> your server IP that runs nginx
>>> if 5 restarts with 5 cycles then alert
>>> check program webserverresponse with path /home/myhome/webserver_response.sh
>>> # if status == 502 then restart
>>> if status == 502 then exec "/usr/local/bin/monit restart nginx"
>>> depends on nginx
>>>
>>> My /home/myhome/webserver_response.sh return 502, but not work, not restart
>>> nginx.
>>>
>>> I did something wrong?
>>>
>>> thanks
>>>
>>> 2012/11/2 Martin Pala <[email protected]>
>>> You can keep the "depends on nginx" as well (if the parent nginx service
>>> will be restarted, it will suppress the child service test during the
>>> restart).
>>>
>>>
>>> On Nov 2, 2012, at 10:16 PM, "Houssan A. Hijazi" <[email protected]>
>>> wrote:
>>>
>>>> Hi,
>>>>
>>>> thanks for your hint.
>>>>
>>>> i don't need put: depends on nginx ?
>>>>
>>>> Thanks
>>>>
>>>>
>>>>
>>>> 2012/11/2 Martin Pala <[email protected]>
>>>> I'm sorry i provided wrong hint - the child service restart action doesn't
>>>> trigger the parent's service restart (the action cascades from parents to
>>>> children but bot vice versa).
>>>>
>>>> The correct way to restart the nginx and prevent th race condition between
>>>> the two checks is:
>>>>
>>>> check program webserverresponse with path
>>>> /home/myhome/webserver_response.sh
>>>> if status == 502 then exec "/usr/bin/monit restart nginx"
>>>>
>>>> Regards,
>>>> Martin
>>>>
>>>>
>>>>
>>>> On Nov 1, 2012, at 6:19 PM, "Houssan A. Hijazi" <[email protected]>
>>>> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> this rule is not work:
>>>>>
>>>>> check program webserverresponse with path
>>>>> /home/myhome/webserver_response.sh
>>>>> if status == 502 then restart
>>>>> depends on nginx
>>>>>
>>>>> if i run /home/myhome/webserver_response.sh in terminal it print 502 but
>>>>> the monit not restart.
>>>>>
>>>>> Can you help me?
>>>>>
>>>>> thanks
>>>>>
>>>>> 2012/11/1 Houssan A. Hijazi <[email protected]>
>>>>> Thanks, Martin
>>>>>
>>>>>
>>>>> 2012/11/1 Martin Pala <[email protected]>
>>>>> Hi,
>>>>>
>>>>> the "check program" was added in Monit 5.3 ... you need to upgrade monit.
>>>>>
>>>>> Regards,
>>>>> Martin
>>>>>
>>>>>
>>>>> On Nov 1, 2012, at 2:59 PM, "Houssan A. Hijazi" <[email protected]>
>>>>> wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> i created the file like this:
>>>>>>
>>>>>> #!/bin/bash
>>>>>> curl -o /dev/null --silent --head --write-out '%{http_code}\n'
>>>>>> http://www.mysite.org
>>>>>>
>>>>>> it return the http response code.
>>>>>>
>>>>>> in monit configuration i do:
>>>>>>
>>>>>> check process nginx
>>>>>> with pidfile /dh/nginx/servers/httpd-myserver/var/logs/nginx.pid
>>>>>> start program = "/etc/init.d/nginx start"
>>>>>> stop program = "/etc/init.d/nginx stop"
>>>>>> if failed host www.mysite.org port 80 protocol HTTP then restart #set
>>>>>> your server IP that runs nginx
>>>>>> if 5 restarts with 5 cycles then alert
>>>>>> check program webserverresponse with path
>>>>>> /home/myhome/webserver_response.sh
>>>>>> if content == "502" then restart
>>>>>> depends on nginx
>>>>>>
>>>>>> When i try start monit:
>>>>>>
>>>>>> $ sudo /etc/init.d/monit start
>>>>>> Starting daemon monitor: Syntax error:
>>>>>> /etc/monit/conf.d/nginx.conf:7: Error: syntax error 'webserverresponse'
>>>>>>
>>>>>> Monit version: 1:5.1.1-1
>>>>>>
>>>>>> thanks
>>>>>>
>>>>>>
>>>>>> 2012/10/31 Martin Pala <[email protected]>
>>>>>> Hi,
>>>>>>
>>>>>> the default HTTP protocol test returns just failure if the HTTP code is
>>>>>> error.
>>>>>>
>>>>>> You can use the "check program" test with custom script and use
>>>>>> curl/wget to get the http response code, for example (not tested):
>>>>>> /usr/local/bin/myhttptest.sh:
>>>>>> --8<--
>>>>>> #!/bin/bash
>>>>>> exit `curl -sL -w "%{http_code}\\n" "http://mymachine"; -o /dev/null`
>>>>>> --8<--
>>>>>>
>>>>>> and then connect it to Monit like this:
>>>>>> --8<--
>>>>>> check process apache with pidfile /var/run/apache.pid
>>>>>> start program = ...
>>>>>> stop program = ...
>>>>>>
>>>>>> check program myhttptest with path /usr/local/bin/myhttptest.sh
>>>>>> if status == 502 then restart
>>>>>> depends on apache
>>>>>> --8<--
>>>>>>
>>>>>>
>>>>>>
>>>>>> Another option is to use the generic send/expect test to write simple
>>>>>> HTTP check and test the 502 response - generic example from the monit
>>>>>> manual:
>>>>>> --8<--
>>>>>> if failed host cave.persia.ir port 4040
>>>>>> send "Open, Sesame!\r\n"
>>>>>> expect "Please enter the cave\r\n"
>>>>>> send "Shut, Sesame!\r\n"
>>>>>> expect "See you later [A-Za-z ]+\r\n"
>>>>>> then restart
>>>>>> --8<--
>>>>>>
>>>>>>
>>>>>> Regards,
>>>>>> Martin
>>>>>>
>>>>>>
>>>>>> On Oct 30, 2012, at 1:57 PM, Houssan A. Hijazi <[email protected]>
>>>>>> wrote:
>>>>>>
>>>>>> > Hi,
>>>>>> >
>>>>>> > i am on dreamhost using nginx with fastcgi, i need use monit to
>>>>>> > monitoring the nginx error, if error is 502 so restart.
>>>>>> >
>>>>>> > in my monit.log i have:
>>>>>> >
>>>>>> > HTTP error: Server returned status 502
>>>>>> >
>>>>>> > How i can see if host returned 502 error ?
>>>>>> >
>>>>>> > Thanks
>>>>>> >
>>>>>> > --
>>>>>> > To unsubscribe:
>>>>>> > https://lists.nongnu.org/mailman/listinfo/monit-general
>>>>>>
>>>>>>
>>>>>> --
>>>>>> To unsubscribe:
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>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> --
>>>>>> Houssan A. Hijazi
>>>>>> Analista de Sistemas
>>>>>> www.lojasnoparaguai.com.br / www.libanovivo.org
>>>>>> --
>>>>>> To unsubscribe:
>>>>>> https://lists.nongnu.org/mailman/listinfo/monit-general
>>>>>
>>>>>
>>>>> --
>>>>> To unsubscribe:
>>>>> https://lists.nongnu.org/mailman/listinfo/monit-general
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> --
>>>>> Houssan A. Hijazi
>>>>> Analista de Sistemas
>>>>> www.lojasnoparaguai.com.br / www.libanovivo.org
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> --
>>>>> Houssan A. Hijazi
>>>>> Analista de Sistemas
>>>>> www.lojasnoparaguai.com.br / www.libanovivo.org
>>>>> --
>>>>> To unsubscribe:
>>>>> https://lists.nongnu.org/mailman/listinfo/monit-general
>>>>
>>>>
>>>> --
>>>> To unsubscribe:
>>>> https://lists.nongnu.org/mailman/listinfo/monit-general
>>>>
>>>>
>>>>
>>>> --
>>>> --
>>>> Houssan A. Hijazi
>>>> Analista de Sistemas
>>>> www.lojasnoparaguai.com.br / www.libanovivo.org
>>>> --
>>>> To unsubscribe:
>>>> https://lists.nongnu.org/mailman/listinfo/monit-general
>>>
>>>
>>> --
>>> To unsubscribe:
>>> https://lists.nongnu.org/mailman/listinfo/monit-general
>>>
>>>
>>>
>>> --
>>> --
>>> Houssan A. Hijazi
>>> Analista de Sistemas
>>> www.lojasnoparaguai.com.br / www.libanovivo.org
>>> --
>>> To unsubscribe:
>>> https://lists.nongnu.org/mailman/listinfo/monit-general
>>
>>
>> --
>> To unsubscribe:
>> https://lists.nongnu.org/mailman/listinfo/monit-general
>>
>>
>>
>> --
>> --
>> Houssan A. Hijazi
>> Analista de Sistemas
>> www.lojasnoparaguai.com.br / www.libanovivo.org
>> --
>> To unsubscribe:
>> https://lists.nongnu.org/mailman/listinfo/monit-general
>
>
> --
> To unsubscribe:
> https://lists.nongnu.org/mailman/listinfo/monit-general
>
>
>
> --
> --
> Houssan A. Hijazi
> Analista de Sistemas
> www.lojasnoparaguai.com.br / www.libanovivo.org
> --
> To unsubscribe:
> https://lists.nongnu.org/mailman/listinfo/monit-general
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