CODEWITHSUNDEEP
javapuppet
ottercoder
ottercoder

Reputation: 862

Start the app through the puppet with params based on the fact

I have a part in init.pp, that starts my app:

systemd::service {'app':
    user => 'java',
    exec => "${java_home}/bin/java \
    -server \
    '-XX:OnOutOfMemoryError=\\'kill -9 %%p\\'' \
    -Dmw.config=/etc/app/app.config \
    -cp /usr/share/app/app.jar ru.app.main.Main app",
}

The newer version of the app.jar starts differently. There's a way, stop the puppet on the nodes, deregister the node from the consul, start the puppet with the new init.pp, and put that node back to the consul. But that just doesn't feel right.

Is there a way to put some "if" in there so I'd be able to make smooth transitions back and forth depending on my app's version or any other field?

Upvotes: 2

Views: 63

Answers (1)

ottercoder
ottercoder

Reputation: 862

found it

if $app_v2 == 'true' {
        systemd::service {'app':
            user => 'java',
            exec => "${java_home}/bin/java \
            -server \
            '-XX:OnOutOfMemoryError=\\'kill -9 %%p\\'' \
            -Dmw.config=/etc/app/app_new.config \
            -cp /usr/share/app/app.jar ru.app.main.App app",
        }
    } else {
        systemd::service {'app':
            user => 'java',
            exec => "${java_home}/bin/java \
            -server \
            '-XX:OnOutOfMemoryError=\\'kill -9 %%p\\'' \
            -Dmw.config=/etc/app/app.config \
            -cp /usr/share/app/app.jar ru.app.main.Main app",
        }
    }

and for getting app_v2 flag, add to /lib/facter/app_v2.rb

require 'facter'

Facter.add(:app_v2) do
  confine :kernel => :Linux
  setcode do
    result = false
    if Facter::Core::Execution.exec('dpkg -l | grep app|awk \'{print$3}\'| cut -c1') == '2'
      result = true
    end
    result
  end
end

Upvotes: 1

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