Unattended install (upgrade) of cassandra via chef

Question

I'm creating a cassandra upgrade/install recipe with chef.

package "cassandra" do
  version "2.1.8"
  action :install
end

When I install over the top of an existing version I get prompted about new config files.

        Configuration file '/etc/cassandra/cassandra.yaml'
        ...
        *** cassandra.yaml (Y/I/N/O/D/Z) [default=N] ?

Chef barfs because apt is waiting for input.

Answer 1

Just found this post on ask ubuntu:

The following appears to do what I need

package "cassandra" do
  version "2.1.8"
  action :install
  options '-o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold"'
end