Hi Joel,
On Tue, Jan 25, 2011 at 01:29:11PM -0800, Joel Krauska wrote:
> I'm not sure if people have asked for this, but I would love a custom
> field/column in the Stats Report web page.
>
> Specifically, I would like to be able to see my backend server
> version. This is a custom text string which I could provide a
> health-check-like URL to populate.
>
> Then the HAProxy stats page could be a one-stop page to watch during
> rolling upgrades of backends.
>
> Probably for easy customization, an external call to third party
> script would be ideal.
>
> Has anyone considered this before? Is there any way to hack existing
> features to do this?
You should take a look at "stats show-desc". You can already use it to
report a section-specific string. You can then have your upgrade script
fill it from a config template. For instance :
backend foo
stats show-desc @@foo.version@@
Then replace @@foo.version@@ with whatever you like.
Assuming you're in a secure enough environment to consider such things,
you should also take a look at "stats show-legends" which reports much
more information (eg: mode, IPs, cookie names, etc...). This is different
from what you asked for but will surely help troubleshoot issues if you
already feel concerned with the config version.
Cheers,
Willy
