Class: EY::SnapshotMinder

Inherits:
Object
  • Object
show all
Defined in:
lib/ey-flex/snapshot_minder.rb

Defined Under Namespace

Classes: Backend

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ SnapshotMinder

Returns a new instance of SnapshotMinder.



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# File 'lib/ey-flex/snapshot_minder.rb', line 104

def initialize(opts={})
  @opts = opts
end

Class Method Details

.backend ⇒ Object 



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# File 'lib/ey-flex/snapshot_minder.rb', line 96

def self.backend
  @backend ||= Backend::Real.new
end

.enable_mock! ⇒ Object 



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# File 'lib/ey-flex/snapshot_minder.rb', line 100

def self.enable_mock!
  @backend = Backend::Mock.new
end

.run(args) ⇒ Object 



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# File 'lib/ey-flex/snapshot_minder.rb', line 60

def self.run(args)
  options = {:command => :list_snapshots}
  # Build a parser for the command line arguments
  opts = OptionParser.new do |opts|
    opts.version = "0.0.1"

    opts.banner = "Usage: ey-snapshots [-flag] [argument]"
    opts.define_head "ey-snapshots: managing your snapshots..."
    opts.separator '*'*80

    opts.on("-l", "--list-snapshots", "list snapshots") do
      options[:command] = :list_snapshots
    end

    opts.on("-c", "--config CONFIG", "DEPRECATED, does nothing") do |config|
      STDERR.puts "WARNING: --config is DEPRECATED and has no effect"
    end

    opts.on("-i", "--instance-id ID", "DEPRECATED, does nothing") do |iid|
      STDERR.puts "WARNING: --instance-id is DEPRECATED and has no effect"
    end

    opts.on("--snapshot", "request a snapshot of the volumes attached to this instance") do
      options[:command] = :snapshot_volumes
    end

    opts.on("-q", "--quiet", "Supress output to STDOUT") do
      options[:quiet] = true
    end

  end

  opts.parse!(args)
  new(options).send(options[:command])
end

Instance Method Details

#backoff(nth_time) ⇒ Object 



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# File 'lib/ey-flex/snapshot_minder.rb', line 126

def backoff(nth_time)
  60*nth_time + rand((60 / (nth_time+1)) + 5) #see tests
end

#list_snapshots ⇒ Object 



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# File 'lib/ey-flex/snapshot_minder.rb', line 130

def list_snapshots
  snapshots = SnapshotMinder.backend.list
  say "#{snapshots.size} Snapshots available:"
  snapshots.each do |s|
    say "#{s.id} - #{s.volume} #{s.state} #{s.progress} #{s.created_at}"
  end
end

#snapshot_volumes ⇒ Object 



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# File 'lib/ey-flex/snapshot_minder.rb', line 108

def snapshot_volumes
  retry_count = 0
  begin
    SnapshotMinder.backend.snapshot
    say "Snapshot requested."
  rescue EY::InstanceAPIClient::Connection::UnexpectedStatus => e
    retry_count += 1
    if retry_count <= 10
      retry_in = backoff(retry_count)
      say "failed with #{e.inspect}, retrying in #{retry_in} seconds"
      SnapshotMinder.backend.wait(retry_in)
      retry
    else
      raise e
    end
  end
end