CODEWITHSUNDEEP
rubychef-infra
Manuel Bernhardt
Manuel Bernhardt

Reputation: 3124

Iterating over an array of hashes in a Chef ERB template

I am trying to build a recipe for chef that has amongst others the following attribute:

default['web-server']['hosts'] = [ { host: "some-ip", server: "some-server", port: "9000" } ]

The idea is to iterate over it to create the config file (lighttpd in this case), like so:

<% if node['web-server']['hosts'].length > 0 -%>
<%   node['web-server']['hosts'].each do |host| -%>

  $HTTP["host"] =~ "<%= host.host %>" {
    proxy.balance = "round-robin" proxy.server = (
      "" => (
          "play" => (
             "host" => "<%= host.server %>",
             "port" => <%= host.port %>
           )
         )
     )
  }
<%   end -%>
<% else -%>
<% end -%>

However, upon running chef-client on the test node, I am greeted with:

FATAL: Chef::Mixin::Template::TemplateError: undefined method `host' for #<Mash:0x00000002b9a878>

What's the correct way of looping over an array of hashes?

Upvotes: 0

Views: 7078

Answers (1)

Manuel Bernhardt
Manuel Bernhardt

Reputation: 3124

Ok, I figured this out. The correct syntax is to access the hash keys via hash[:key], i.e.

$HTTP["host"] =~ "<%= host[:host] %>" {
    proxy.balance = "round-robin" proxy.server = (
         "" => (
             "play" => (
               "host" => "<%= host[:server] %>",
               "port" => <%= host[:port] %>
             )
         )
       )
  }
  <%   end -%>
  <% else -%>
  <% end -%>

Upvotes: 3

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