Question

I am very new to ruby and chef. I am trying to create entries in an nginx.conf file based on the number of cores.

for i in <%= node["cpu"]["total"]%>
upstream frontends {
        server 127.0.0.1:805x;
    }

end

So..if 4 cores the file will look like this:

upstream frontends {
            server 127.0.0.1:8051;
            server 127.0.0.1:8052;
            server 127.0.0.1:8053;
            server 127.0.0.1:8054;
        }

Answer 1

Recipe

template "/etc/nginx/sites-available/my-site.conf" do
  variables :frontends_count => node["cpu"]["total"]
end

Template

upstream frontends {
<% @frontends_count.times do |i| %>
  server 127.0.0.1:805<%= i + 1 %>;
<% end %>
}