Using chef array attribute within bash resource

Question

I am having node['server']['ipaddress'] attribute that includes 3 ip addresses as below:

node['server']['ipaddress']=["10.211.241.21", "10.211.241.20", "10.211.241.22"]

I am now trying to use the above values in a chef bash resource

bash 'configure_engine_discovery' do
  code <<-EOH
  echo `docker run --server ipaddress1 --server ipaddress2 --server ipaddress3 --update`
  EOH
end

There might be more than 3 ipaddresses and I want to make the above bash command more dynamic so that the I don't require to change the bash every time and it can accommodate any number of server ips

Keith Bennett · Accepted Answer · 2016-04-29 15:36:16Z

2

Try this:

server_specs = node['server']['ipaddress'].map { |s| "--server #{s}" }.join(' ')
command = "docker run #{server_specs} --update"
echo command

By the way, why isn't the key named in the plural, ipaddresses instead of ipaddress? That's confusing to readers.

answered Apr 29, 2016 at 15:36

Keith Bennett

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