Append string to list items.

[Douglas Garstang]

I have an array:

$nodes = ['gfs01' ,'gfs02', 'gfs03', 'gfs04]

and a string variable:

$brick_store = "/var/bricks"

How can I append "/var/bricks" to each item in the array? Lack of a
looping construct makes this challenging in puppet.

Such that:

brick_array = ['gfs01:/var/bricks', 'gfs02:/var/bricks', ... ]

I also need to come up with a way to append a further sequence of
incrementing brick numbers to the items as well.

Doug

[Trevor Vaughan]

Try using regsubst:
http://docs.puppetlabs.com/references/stable/function.html#regsubst

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Trevor Vaughan
Vice President, Onyx Point, Inc
(410) 541-6699
tvau...@onyxpoint.com

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[Douglas Garstang]

Trevor,

Thanks. I'm getting 'bad target Array' with:

define glusterfs::volume_create ( $brick_store, $nodes, $replicas='1',
$transport='tcp' ) {
.....

$n2 = regsubst ($nodes, '$', ":$brick_store") # Bad target array here.
notice ("bricks = $n2")
}

On entering the define, $nodes = ['gfs01.us1.xxx.com',
'gfs02.us1.xxx.com'] and $brick_store="/var/bricks"

Doug.

Regards,

Douglas Garstang
http://www.linkedin.com/in/garstang
Email: doug.g...@gmail.com
Cell: +1-805-340-5627

[Ashley Penney]

You could give inline_template() from stdlib a try instead. You could do:

$nodes = ['gfs01' ,'gfs02', 'gfs03', 'gfs04]

$brick_store = "/var/bricks"
$new = inline_template('nodes.each {|n| etc etc etc')

I'm not 100% sure it'll work in this case but I've done other similar
evil things with inline_template.

On Mon, Aug 27, 2012 at 4:06 PM, Douglas Garstang

[jcbollinger]

On Monday, August 27, 2012 3:06:30 PM UTC-5, Douglas wrote:

Trevor,

Thanks. I'm getting 'bad target Array' with:

define glusterfs::volume_create ( $brick_store, $nodes, $replicas='1',
$transport='tcp' ) {
 .....

    $n2 = regsubst ($nodes, '$', ":$brick_store") # Bad target array here.
    notice ("bricks = $n2")
}

On entering the define, $nodes = ['gfs01.us1.xxx.com',
'gfs02.us1.xxx.com'] and $brick_store="/var/bricks"

I think I would have expected that to work as written, but perhaps Ruby objects to the pattern having only an anchor.  What about this:

$n2 = regsubst ($nodes, '^(.*)$', "\1:$brick_store")


John

[Krzysztof Wilczynski]

Hi,

You could try this:

matti@acrux ~ $ cat | puppet apply --noop
notice bracket_expansion('gfs[01-10]:/var/bricks')      
notice: Scope(Class[main]): gfs01:/var/bricks gfs02:/var/bricks gfs03:/var/bricks gfs04:/var/bricks gfs05:/var/bricks gfs06:/var/bricks gfs07:/var/bricks gfs08:/var/bricks gfs09:/var/bricks gfs10:/var/bricks
notice: Finished catalog run in 0.11 seconds

Not quite a loop, but will do the trick (and handles zero-padding).

https://github.com/kwilczynski/puppet-functions/blob/master/lib/puppet/parser/functions/bracket_expansion.rb

I will look into adding array-walking mode to join, prefix and join_with_prefix.

KW