I have no idea why backend is sick

[Abraham Cruz Sustaita]

I can see that's exact the problem... so now I have to figured it out why
two servers with the exact same configuration have different results...

Thanks to all for your help.

2012/7/18 Hugo Cisneiros (Eitch) <hugo.cisneiros at gmail.com>

> On Wed, Jul 18, 2012 at 8:55 PM, Abraham Cruz Sustaita
> <abraham.sustaita at buscacorp.com> wrote:
> > I have 8 servers, 7 of them are working as they supposed to be working.
> > However, I have app02, and it is not working. The first problem I noticed
> > was it was reporting errors even when I change the error reporting to
> off.
> > The second problem, and the one that is give me troubles, is that after I
> > reboot the server, it is not working. I have this in the log:
> >
> > varnishlog | grep app02
> >     0 Backend_health - app02 Still healthy 4--X-R- 3 3 5 0.000488
> 0.000000
> > HTTP/1.1 301 Moved Permanently
> [...]
> >     0 Backend_health - app02 Went sick 4--X-R- 2 3 5 0.000722 0.000000
> > HTTP/1.1 301 Moved Permanently
> [...]
> >     0 Backend_health - app02 Still sick 4--X-R- 0 3 5 0.000503 0.000000
> > HTTP/1.1 301 Moved Permanently
> >
> > But the problem is that the server is working ok. If I do wget app02 from
> > varnish, it returns what it is supposed to return! But varnish says that
> it
> > went sick... Is there anyway I can trace this?
>
> As Shibashish said in the thread, the two requests (varnish and wget)
> aren't the same, since Varnish does not specify the Host header and
> your wget does.
>
> Probably, your Apache configuration isn't catching Varnish's request
> because it's not in the correspondent VirtualHost, and it's using the
> default configuration. To simulate your varnish's probe, you have to
> do:
>
> wget -O /dev/null -S http://app02.domain.com/health-check.html
>
> *without* hosts or anything. It must return HTTP 200. Take a look at
> Apache's global configuration and see if it's redirecting. Use wget to
> help identify the redirects.
>
> --
> []'s
> Hugo
> www.devin.com.br
>
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>
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