helper for making kubernetes secrets yaml files. Supports key/val strings and file contents

k8s-secrets.rb

#!/usr/bin/env ruby
#
# helper for making kubernetes secrets yaml files. Supports key/val strings and file contents
#
# Example:
# --------
#
#    $ echo 'top secret stuff right here' >secret.txt
#    $ ./k8s-secrets.rb secret-volume @secret.txt foo=bar biz=bop
#
#     ---
#     apiVersion: v1
#     kind: Secret
#     metadata:
#         name: secret-volume
#     type: Opaque
#     data:
#       secret.txt: |
#         dG9wIHNlY3JldCBzaGl0IHJpZ2h0IGhlcmUK
#       foo: |
#         YmFy
#       biz: |
#         Ym9w
#
# Author: joe miller / https://github.com/joemiller

require 'base64'
require 'yaml'

secret_spec = {
  'apiVersion' => 'v1',
  'kind' => 'Secret',
  'metadata' => {
    'name' => ''
  },
  'type' => 'Opaque',
  'data' => {}
}

if ARGV.length < 2
  puts "Usage: k8s-secrets <secret-vol-name> <key1=val1> <@file1> ..."
  exit(1)
end

secret_spec['metadata']['name'] = ARGV.shift

ARGV.each do |i|
  case i
  when /^@/
    key = i[1..-1]
    data = File.open(key).read()
  when /=/
    key, data = i.split(/=/)
  else
    puts "Unrecognized format '#{i}'. Should be either 'key=value' or '@filename'."
    exit(1)
  end
  secret_spec['data'][key] = Base64.encode64(data)
end

puts YAML.dump(secret_spec)