Help with looping in 1.4

[D. Christopher Dale]

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I am trying to auto generate my host file for a grid deployment.

The following works well if I actually put a number in the of the for
loop.  I have tried quite a few variations on this theme but cannot seem
to identify a working solution.  Any ideas?

b_grid=$grid
let b_grid_size=$grid_size
let b_final_oct=$first_grid_node_final_oct
let b_grid_size=$grid_size
b_pub_sub_net=$pub_sub_net
b_priv_sub_net=$priv_sub_net

#for $cur_node in $range( $b_grid_size )

  let b_vip=$b_final_oct+20
  awk -v pub_sub_net="$b_pub_sub_net" -v cur_oct="$b_final_oct" -v
grid="$b_grid" -v cur_node="$cur_node" 'BEGIN {printf("%s%s
%s%02s.%s.gesi  %s%02s\n", pub_sub_net, cur_oct, grid, cur_node, grid,
grid, cur_node)}' >> /etc/hosts
  awk -v pub_sub_net="$b_pub_sub_net" -v grid="$b_grid" -v
vip="$b_vip"
- -v cur_node="$cur_node" 'BEGIN {printf("%s%s    %s%02s-vip\n",
pub_sub_net, vip, grid, cur_node)}' >> /etc/hosts
  awk -v priv_sub_net="$b_priv_sub_net" -v grid="$b_grid" -v
cur_oct="$b_final_oct" -v cur_node="$cur_node" 'BEGIN
{printf("%s%s
%s%02s-priv\n", priv_sub_net, cur_oct, grid, cur_node)}' >> /etc/hosts
  let b_final_oct+=1

#end for
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[Dale Reagan]

Greetings,
At 09:12 AM 12/31/2008, you wrote:
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> I am trying to auto generate my host file for a grid deployment.
>
> The following works well if I actually put a number in the of the for
> loop.  I have tried quite a few variations on this theme but cannot seem
> to identify a working solution.  Any ideas? 
Sorry - not clear to me - generate via Cheetah, Python or something else?

I converted a portion of this to a Bash script - what is your desired 
output?  The output from your script is non-standard for a /etc/hosts 
file..., i.e. I would expect an IP address followed by hostnames and 
aliases (as below).

aa.bb.cc.dd      hostname     hostname.alias1       hostname.alias2

Also note that the behavior of 'awk' using the '-v' option will vary 
depending upon the version of awk and/or OS (this may not be a problem but 
could make the solution less portable...)

Please provide a sample output line and I should be able to give you a 
bash/bash-awk solution...


:)
Dale

= = = = = = = = = = = = = = = = = = = =
Dale E. Reagan       | [phone]
Photographer / Consultant    | Dale(a)DaleReagan.Com
http://www.dalereagan.com/
PO Box 15336, Savannah, Ga 31416  USA

[Michael DeHaan]

D. Christopher Dale wrote:
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>  I am trying to auto generate my host file for a grid deployment.
>
>  The following works well if I actually put a number in the of the for
>  loop.  I have tried quite a few variations on this theme but cannot seem
>  to identify a working solution.  Any ideas?
>
>  b_grid=$grid
>  let b_grid_size=$grid_size
>  let b_final_oct=$first_grid_node_final_oct
>  let b_grid_size=$grid_size
>  b_pub_sub_net=$pub_sub_net
>  b_priv_sub_net=$priv_sub_net
>
>     
I'm not sure I grok the "let" stuff, but if the issue is you have a 
variable stored in Cobbler as a string and you want the Python range 
function to work, that should be easy enough.

Try something simple to cast the string back into an int and range 
should work fine.

#set $mysize = int($mysize)

In general, more of a Cheetah question, so you may also like to see 
cheetahtemplate.org for other docs/info.

--Michael

>  #for $cur_node in $range( $b_grid_size )
>
>    let b_vip=$b_final_oct+20
>    awk -v pub_sub_net="$b_pub_sub_net" -v cur_oct="$b_final_oct" -v
>  grid="$b_grid" -v cur_node="$cur_node" 'BEGIN {printf("%s%s
>  %s%02s.%s.gesi  %s%02s\n", pub_sub_net, cur_oct, grid, cur_node, grid,
>  grid, cur_node)}' >> /etc/hosts
>    awk -v pub_sub_net="$b_pub_sub_net" -v grid="$b_grid" -v
> vip="$b_vip"
>  - -v cur_node="$cur_node" 'BEGIN {printf("%s%s    %s%02s-vip\n",
>  pub_sub_net, vip, grid, cur_node)}' >> /etc/hosts
>    awk -v priv_sub_net="$b_priv_sub_net" -v grid="$b_grid" -v
>  cur_oct="$b_final_oct" -v cur_node="$cur_node" 'BEGIN
> {printf("%s%s
>  %s%02s-priv\n", priv_sub_net, cur_oct, grid, cur_node)}' >> /etc/hosts
>    let b_final_oct+=1
>
>  #end for
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