On Fri, Feb 24, 2012 at 07:08:54AM +0100, Baptiste wrote: > On Thu, Feb 23, 2012 at 8:34 AM, Willy Tarreau <[email protected]> wrote: > > On Sat, Feb 04, 2012 at 03:44:45PM +0100, Patrick Mézard wrote: > >> Le 04/02/12 15:01, Baptiste a écrit : > >> > Hi everybody, > >> > > >> > Please find in attachment a patch which provides IMAP health checking. > >> > > >> > Note that it provides also a clean application logout :) > >> > > >> > it applies on HAProxy HEAD git. > >> > > >> > I've tested it on my courier IMAP server and it works as expected. > >> > You can test it with the simple conf below: > >> > listen imap > >> > bind 0.0.0.0:1143 > >> > mode tcp > >> > option imapchk > >> > server imapserver <IP>:143 check > >> > > >> > Your feedback are welcome. > >> > >> Some remarks about the documentation : > >> - It would be great if Willy could pronounce on the options naming: *chk / > >> *-check / *-chk > > > > I agree with Patrick here. We're trying to get rid of shortened names which > > are too confusing even if shorter to type. Baptiste, could you please rename > > it "imap-check" so that it follows the new naming convention ? > > > > (...) > >> Sidenote: it would be great to unify all the health checks descriptions. > >> All > >> of them describe the check with more or less details, then sometimes add > >> consideration about logging and whatnots. > > > > Yes, I think we should have a full section dedicated to health checks and > > tracking in the doc. This would also reduce cross-references. Anyone > > volunteer > > for contributing this ? We need to address the following points in the check > > section : > > > > - health checks : introduction / why performing health checks. Some of > > this is already present in other sections. > > - describe the 4 (?) server states : UP, DOWN, NOLB, MAINT and their > > transistions > > - describe the slowstart mechanism > > - describe the disable-on-404 mechanism which introduces the NOLB state > > - describe the server tracking mechanism and possibilities > > - explain how timeout connect and timeout check influence the checks > > - describe the impacts of the global "spread-checks" setting > > - explain how a health check uses "source" and "port" parameters to > > establish a connection > > - reminder that checks are per-process > > - enumerate all the currently supported health checks methods with their > > parameters > > > > Right now, I *think* that all the text exists at other places in the doc > > and has to be moved. There will obviously have to be some glue to tie all > > this together, and to place reference to this section into places where > > the text ws stolen (at least to give pointers for full descriptions of > > some options). What is really missing right now are examples for all > > concepts and methods, but with a dedicated section it would be much more > > suited to provide them. > > > > If someone is interested in doing this work, it would be really great and > > I would be happy to help with it. > > > > Thanks, > > Willy > > > > Hi Willy, > > As discussed yesterday evening, I'll take care of the following: > 1. rewrite health check documentation in HAProxy
(more moves than rewrites please :-)) > 2. patch haproxy to rename all health checks to <protocol>-check (old > name will be kept for backward compatibility) > 3. patch haproxy to allow a health check to send a logout string > (usefull for POP and IMAP at least) > 4. patch haproxy to add a POP3 health check > 5. patch haproxy to add a IMAP4 health check Fine, thanks Baptiste! Willy
