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@arangamani
arangamani / chef_attribute_converge.rb
Last active February 20, 2023 02:44
Dynamically update attribute of a Chef resource during converge phase (Node variable assignment in Compile vs Converge)
# In Chef, when a resource is defined all its variables are evaluated during
# compile time and the execution of the resource takes place in converge phase.
# So if the value of a particular attribute is changed in converge
# (and not in compile) the resource will be executed with the old value.
# Example problem:
# Let's consider this situation where there are two steps involved in a recipe
# Step 1 is a Ruby block that changes a node attribute. Rubyblocks get executed
# in converge phase
# Step 2 is a Chef resource that makes use of the node attribute that was
#!/usr/bin/env ruby
recipe_path = ARGV[0]
if recipe_path.nil?
STDERR.puts "usage: chef-apply RECIPE_FILE"
exit 1
end
recipe_path = File.expand_path(recipe_path)