Module: CemAcpt::Utils::NodeUtils

Defined in:
lib/cem_acpt/utils.rb

Class Method Summary collapse

Class Method Details

.ephemeral_ssh_key(type: 'ecdsa', bits: '521', comment: nil, keydir: '/tmp') ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/cem_acpt/utils.rb', line 50

def self.ephemeral_ssh_key(type: 'ecdsa', bits: '521', comment: nil, keydir: '/tmp')
  raise ArgumentError, 'keydir does not exist' unless File.directory?(keydir)

  keyfile = "#{keydir}/#{SecureRandom.hex(16)}"
  keygen_cmd = [
    'ssh-keygen',
    "-t #{type}",
    "-b #{bits}",
    "-f #{keyfile}",
    '-N ""',
    '-q',
  ]
  keygen_cmd << "-C \"#{comment}\"" if comment
  _, stderr, status = Open3.capture3(keygen_cmd.join(' '))
  raise "Failed to generate ephemeral SSH key: #{stderr}" unless status.success?

  [keyfile, "#{keyfile}.pub"]
end

.random_instance_name(prefix: 'cem-acpt-', length: 24) ⇒ Object 



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# File 'lib/cem_acpt/utils.rb', line 45

def self.random_instance_name(prefix: 'cem-acpt-', length: 24)
  rand_length = length - prefix.length
  "#{prefix}#{SecureRandom.hex(rand_length)}"
end