Re: [capistrano] Abort capistrano deploy if no puppet exists

[Lee Hambley]

Just call out to puppet, when it fails, then your deploy will bail out too.

Essentially this is the best way, beware that it will break if more than one server is involved and some have puppet, and some don't. 

For that reason people often implement a run() with a longer chunk of bash script, so that the script will do the right thing (pull down puppet, then install) or just install if it's already there.

Good luck

Lee Hambley

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On 28 February 2013 16:28, Peter M Souter <p.mo...@gmail.com> wrote:

Hi guys,

Quick question: What would be the best way of making sure a service is installed on the remote server, and then aborting if it's not?

Right now I have something like this: http://pastie.org/6354736

it seems a bit messy, but that's how I've seen it done in other capistrano recipes that run a command that has an exit code.

Thanks!

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[Donovan Bray]

That actually only works if you have one server. If you have more than one you risk raising a positive when a different box doesn't have what you are which'ing. 

'which' will set an exit code > 0 if the executable is not found. Cap will abort on a failed command so all you need is

run "which puppet"

Better:

Test and see if it can respond with a more significant request. 

run "puppet agent --fingerprint"

Block deploys:

before :deploy do

   run "puppet agent --fingerprint"

end

YMMV as I don't use puppet. 

[Peter M Souter]

It's a weird edge case with what I'm doing, as it's an extension of capistrano, it downloads puppet manifests to the remote server then runs them.

I'll add a before step as recomended by dbray! Thanks