Re: FEATURE: Add range iterator item variable for server-template and zero-padding converter

[Aleksandar Lazic]

Hi.

Am 29.03.2019 um 09:34 schrieb Matous Jan Fialka:
> Hello,
> 
> please consider adding range iterator item variable (say `rng.iteritem`) for
> the `server-template` directive so that it can be expanded in the 
> `:`
> part of the statement or anywhere else where applicable (see in the example 
> snippet
> below).
> 
> Also to have general zero-padding converter (say `zeropad()`) to pad 
> values
> with zeroes would be splendid for use with `server-template` or elsewhere 
> (therefor
> I aggregated both things into single feature request).


Please can you open a issue for that Feature Request, thanks.
https://github.com/haproxy/haproxy/issues

Regards
Aleks

> -snip-
> 
>     zeropad()
>   Performs a zero-padding of preceding expression to the given .
> 
>   Example:
>     server-template s 3 "svc-%[rng.iteritem,zeropad(3)].domain.tld:80" 
> check
> 
>     # would be equivalent to:
>     server s1 svc-001.domain.tld:80 check
>     server s2 svc-002.domain.tld:80 check
>     server s3 svc-003.domain.tld:80 check
> 
> -snip-
> 
> I am not sure how hard it would be to implemented it but it could be very 
> helpful
> in case you use many backend servers with consistent sequential naming as 
> shown in
> the example snippet.
> 
> Many thanks for providing us wich such an excellent piece of software which
> *HAProxy*
> truly is!
> 
> Sincerely,
> 

FEATURE: Add range iterator item variable for server-template and zero-padding converter

[Matous Jan Fialka]

Hello,

please consider adding range iterator item variable (say 
`rng.iteritem`) for
the `server-template` directive so that it can be expanded in the 
`:`
part of the statement or anywhere else where applicable (see in the 
example snippet

below).

Also to have general zero-padding converter (say `zeropad()`) to 
pad values
with zeroes would be splendid for use with `server-template` or 
elsewhere (therefor

I aggregated both things into single feature request).

-snip-

zeropad()
  Performs a zero-padding of preceding expression to the given 
.


  Example:
server-template s 3 
"svc-%[rng.iteritem,zeropad(3)].domain.tld:80" check


# would be equivalent to:
server s1 svc-001.domain.tld:80 check
server s2 svc-002.domain.tld:80 check
server s3 svc-003.domain.tld:80 check

-snip-

I am not sure how hard it would be to implemented it but it could be 
very helpful
in case you use many backend servers with consistent sequential naming 
as shown in

the example snippet.

Many thanks for providing us wich such an excellent piece of software 
which *HAProxy*

truly is!

Sincerely,

--
mjf