Re: Check that text does not exist on a page on a name-based virtual host

[Martin Pala]

The send/expect supports posix regular expression, so it should be possible to 
define negative match.


On Oct 4, 2010, at 2:30 PM, Mark Feeney wrote:

> Hi, Martin.
> 
> Thank you for your reply.  I can probably find a way to make the
> second example work, but what would be ideal for my particular case
> would be a "negative expect".  i.e. something like this:
> 
> if failed host cave.persia.ir port 4040
>   send "Open, Sesame!\r\n"
>   expect anything but "sorry, the cave door is broken!"
> then restart
> 
> I didn't see anything in the docs supporting this idea with
> send/expect.  Wondering if I missed something.
> 
> Related question: does the regex library monit uses support
> negative-lookahead matching?
> 
> Thanks,
> 
> 
> Mark.
> 
> 
> 
> On Mon, Oct 4, 2010 at 6:51 AM, Martin Pala <address@hidden> wrote:
>> Hi,
>> 
>> you can use the "hostheader" option with the http protocol test (requires 
>> monit 5.1.1 or newer) - unfortunately this syntax doesn't support the 
>> "content" check.
>> 
>> Example:
>> --8<--
>> check host production with address 127.0.0.1
>>    if failed port 9999 protocol http request "/some_page" hostheader 
>> "foo.com" then alert
>> --8<--
>> 
>> We should consolidate the url test to support hostheader + the http protocol 
>> test to support content check.
>> 
>> 
>> As a workaround, you can define the whole HTTP request and expected response 
>> using generic send/expect test. Example:
>> --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 2, 2010, at 10:28 PM, Mark Feeney wrote:
>> 
>>> Greetings.
>>> 
>>> First: I love monit.  Excellent tool.  Very simple and effective.
>>> Thanks to all involved.
>>> 
>>> I have come up with something I can't figure out how to monitor,
>>> though:  I want to check that a web page does not contain certain text
>>> and the page is on a name-based virtual host.
>>> 
>>> This almost works for me:
>>> 
>>> check host production with address 127.0.0.1
>>>    if failed url
>>>        http://foo.com/some_page
>>>        and content != 'BAD'
>>>        then restart
>>> 
>>> However, it's incorrect for me to use "http://foo.com"; since it's a
>>> cluster, so restarting the current server isn't necessarily going to
>>> help.
>>> 
>>> What I want is something like:
>>> 
>>> check host production with address 127.0.0.1
>>>    if failed url
>>>        http://127.0.0.1:9999/some_page
>>>        use host header "foo.com" # not real syntax
>>>        and content != 'BAD'
>>>        then restart
>>> 
>>> Is there a way to achieve this?  proto http and SEND/EXPECT seemed a
>>> possibility, but I'm not sure how to write the EXPECT part.
>>> 
>>> I'm using monit 4.10.1.
>>> 
>>> Thanks,
>>> 
>>> 
>>> Mark.
>>> 
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>> 
>> 
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