Using conditional check for hosts in task definition

[Noman Amir Jamil]

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.

[Lee Hambley]

That's not possible, as the task body runs in parallel on all hosts.

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[Rafa García]

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[1]

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

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

[Noman Amir Jamil]

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.