Rename AWS Parameter Store Values

rename-parameter-store-values.rb

require 'json'

# Rename parameter store paths. Takes:
# - parameter store json file path
# - old path
# - new path to use
old_path, new_path, _rest = ARGV
params = `aws ssm get-parameters-by-path --path #{old_path} --with-decryption`
params = JSON.parse(params, object_class: OpenStruct)

params.Parameters.each do |param|
  name = param.Name.gsub(old_path, new_path)
  value = param.Value.gsub(old_path, new_path)
  type = param.Type

  json_body = {"Name" => name, "Value" => value, "Type" => type }.to_json

  # Assumes default KMS key for 'SecureString' type.
  output = `aws ssm put-parameter --cli-input-json '#{json_body}'`
  puts output
end

# Run `aws ssm delete-parameters --names ...` to delete old version of parameters.