support for Host header about apache_exporter

[roidelapluie]

just put the host in the status url.

http://myhost/

[ketzacoatl]

That would work if you ran 1 instance of apache. Let's say you have multiple instances of apache running, so you then run one instance of apache_exporter per instance of apache. Each apache_exporter is going to talk to exactly one instance of apache on a particular http://IP:port. The instances get tagged, and you want continuity in the metrics and where they originate from. You do not want it moving around. This is why we point apache_exporter at an IP:port, and then end up needing to include the Host header for applications that rely on that for routing through the vhost configuration.

[ketzacoatl]

When reviewing the HTTP client code, it seems easy to make a spot for the host header, but I'm not 100% sure I see how to do this correctly in the apache_exporter code base. Can anyone point me in the right direction to poke at this some more? Thanks :)

[Lusitaniae]

hi @ketzacoatl , have a look at

https://github.com/Lusitaniae/apache_exporter/blob/master/apache_exporter.go#L168

Just need to change this with new options for http client.

Then add new console flag at

https://github.com/Lusitaniae/apache_exporter/blob/master/apache_exporter.go#L27

[ketzacoatl]

Thanks for the info @Lusitaniae! I've got zero significant golang experience, but I'll see what I can work out :)

[Lusitaniae]

Merged PR should solve it.

[ketzacoatl]

yahoo! thanks!