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Using conditional check for hosts in task definition
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Noman Amir Jamil  
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 More options Feb 8, 4:12 am
From: Noman Amir Jamil <n.amir.ja...@gmail.com>
Date: Wed, 8 Feb 2012 13:12:34 +0400
Local: Wed, Feb 8 2012 4:12 am
Subject: Using conditional check for hosts in task definition
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Hi All,

I was wondering if it is possible to include a conditional check in task
definition. For example, I have a task defined:

task :check_tomcat6_status, :roles => :app do
    sudo "/sbin/service tomcat6 status"
    run "sleep 15s"
end

I want to introduce a conditional hosts check in it, like:

if :hosts = host1 then
   sudo "/sbin/service tomcat5 status"
else
  sudo "/sbin/service tomcat6 status"
fi
 run "sleep 15s"
end

Can someone help me with the correct syntax for this scenario?

Thanks
Noman A.


 
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Lee Hambley  
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 More options Feb 8, 4:24 am
From: Lee Hambley <lee.hamb...@gmail.com>
Date: Wed, 8 Feb 2012 10:24:13 +0100
Local: Wed, Feb 8 2012 4:24 am
Subject: Re: [capistrano] Using conditional check for hosts in task definition
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That's not possible, as the task body runs in parallel on all hosts.


 
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Rafa García  
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 More options Feb 8, 6:10 am
From: Rafa García <conta...@rafagarcia.net>
Date: Wed, 8 Feb 2012 12:10:06 +0100
Local: Wed, Feb 8 2012 6:10 am
Subject: Re: [capistrano] Using conditional check for hosts in task definition
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Hi Noman,

  You can do it using shellscript:

task :check_tomcat_status, :roles => :app do
    run "#{sudo} /usr/local/sbin/check_tomcat_status.sh"
    run "sleep 15s"
end

Being check_tomcat_status.sh a shell script that check, i.e., if service
tomcat6 exists and do the work else do the work with tomcat5

   Another option could be define the role with tomcat5 and tomcat6
modifier:

role :app, "127.0.0.1", :tomcat5 => true
role :app, "127.0.0.2", :tomcat6 => true

   Later define the task:

task :check_tomcat_status, :roles => :app do
    run "#{sudo} /sbin/service tomcat5 status", :only => {:tomcat5 => true}
    run "#{sudo} /sbin/service tomcat6 status", :only => {:tomcat6 => true}
    run "sleep 15s"
end

Regards

Note: The sudo use as run command is deprecated, last
paragraph<https://github.com/capistrano/capistrano/wiki/2.x-DSL-Action-Invokati...>
[1]

[1]
https://github.com/capistrano/capistrano/wiki/2.x-DSL-Action-Invokati...

2012/2/8 Noman Amir Jamil <n.amir.ja...@gmail.com>


 
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Noman Amir Jamil  
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 More options Feb 8, 7:07 am
From: Noman Amir Jamil <n.amir.ja...@gmail.com>
Date: Wed, 8 Feb 2012 16:07:42 +0400
Local: Wed, Feb 8 2012 7:07 am
Subject: Re: [capistrano] Using conditional check for hosts in task definition
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Hi Garcia,

Thank you so much for the detailed input. I will give both the options a
shot and see which one gets my task done!

Regards
Noman A.


 
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