Class: MCollective::Util::Playbook::Tasks

Inherits:
Object
  • Object
show all
Includes:
TemplateUtil
Defined in:
lib/mcollective/util/playbook/tasks.rb,
lib/mcollective/util/playbook/tasks/base.rb,
lib/mcollective/util/playbook/tasks/shell_task.rb,
lib/mcollective/util/playbook/tasks/slack_task.rb,
lib/mcollective/util/playbook/tasks/webhook_task.rb,
lib/mcollective/util/playbook/tasks/mcollective_task.rb,
lib/mcollective/util/playbook/tasks/graphite_event_task.rb

Defined Under Namespace

Classes: Base, Graphite_eventTask, McollectiveTask, ShellTask, SlackTask, WebhookTask

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from TemplateUtil

#__template_process_string, #__template_resolve, #t

Constructor Details

#initialize(playbook) ⇒ Tasks

Returns a new instance of Tasks.



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# File 'lib/mcollective/util/playbook/tasks.rb', line 17

def initialize(playbook)
  @playbook = playbook

  reset
end

Instance Attribute Details

#results ⇒ Object (readonly)

Returns the value of attribute results.



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# File 'lib/mcollective/util/playbook/tasks.rb', line 15

def results
  @results
end

#tasks ⇒ Object (readonly)

Returns the value of attribute tasks.



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# File 'lib/mcollective/util/playbook/tasks.rb', line 15

def tasks
  @tasks
end

Instance Method Details

#from_hash(data) ⇒ Object 



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# File 'lib/mcollective/util/playbook/tasks.rb', line 181

def from_hash(data)
  case data
  when Array
    load_tasks(data, "tasks")
  when Hash
    data.each do |set, tasks|
      load_tasks(tasks, set)
    end
  end

  self
end

#load_tasks(data, set) ⇒ Object 



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# File 'lib/mcollective/util/playbook/tasks.rb', line 151

def load_tasks(data, set)
  data.each_with_index do |task, idx|
    task.each do |type, props|
      Log.debug("Loading task %d of type %s into %s" % [idx, type, set])

      runner = runner_for(type)
      runner.description = props.fetch("description", "%s task" % [type])

      task_data = {
        :description => runner.description,
        :type => type,
        :runner => runner,
        :properties => {
          "tries" => 1,
          "try_sleep" => 10,
          "fail_ok" => false
        }.merge(props)
      }

      runner.fail_ok = task_data[:properties]["fail_ok"]

      task_data[:result] = TaskResult.new(task_data)

      @tasks[set] << task_data
    end
  end

  @tasks[set]
end

#prepare ⇒ Object 



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# File 'lib/mcollective/util/playbook/tasks.rb', line 36

def prepare; end

#reset ⇒ Object 



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# File 'lib/mcollective/util/playbook/tasks.rb', line 23

def reset
  @results = []
  @tasks = {
    "tasks" => [],
    "pre_task" => [],
    "post_task" => [],
    "on_fail" => [],
    "on_success" => [],
    "pre_book" => [],
    "post_book" => []
  }
end

#run ⇒ Object 



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# File 'lib/mcollective/util/playbook/tasks.rb', line 125

def run
  @playbook.in_context("running") do
    unless run_set("pre_book")
      Log.warn("Playbook pre_book hook failed to run, failing entire playbook")
      return false
    end

    success = run_set("tasks")

    Log.info("Finished running main tasks in playbook: success: %s" % success)

    if success
      success = run_set("on_success")
    else
      run_set("on_fail")
    end

    unless run_set("post_book")
      Log.warn("Playbook post_book hook failed to run, failing entire playbookbook")
      return false
    end

    success
  end
end

#run_set(set) ⇒ Boolean

Runs a specific task set

Parameters:

  • set (String) —

    one of the known task sets

Returns:

  • (Boolean) —

    true if all tasks and all their hooks passed



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# File 'lib/mcollective/util/playbook/tasks.rb', line 103

def run_set(set)
  set_tasks = @tasks[set]

  return true if set_tasks.empty?

  @playbook.in_context(set) do
    Log.info("About to run task set %s with %d task(s)" % [set, set_tasks.size])

    # would typically use map here but you cant break out of a map and keep the thus far built up array
    # so it's either this or a inject loop
    passed = set_tasks.take_while do |task|
      @playbook.in_context("%s.%s" % [set, task[:type]]) { run_task(task, set, set == "tasks") }
    end

    set_success = passed.size == set_tasks.size

    Log.info("Done running task set %s with %d task(s): success: %s" % [set, set_tasks.size, set_success])

    set_success
  end
end

#run_task(task, set, hooks = true) ⇒ Boolean

Runs a specific task

Parameters:

  • task (Hash) —

    a task entry

  • set (String) —

    the set the task is running in

  • hooks (Boolean) (defaults to: true) —

    indicates if hooks should be run

Returns:

  • (Boolean) —

    indicating task success



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# File 'lib/mcollective/util/playbook/tasks.rb', line 53

def run_task(task, set, hooks=true)
  properties = task[:properties]
  result = task[:result]
  task_runner = task[:runner]

  Log.info("About to run task: %s" % t(task[:runner].description))
  result.description = t(task[:runner].description)

  if hooks && !run_set("pre_task")
    Log.warn("Failing task because a critical pre_task hook failed")
    return false
  end

  if properties["pre_sleep"]
    Log.info("Sleeping %d seconds before check" % [properties["pre_sleep"]])
    sleep(Integer(properties["pre_sleep"]))
  end

  (1..properties["tries"]).each do |try|
    task_runner.from_hash(t(properties))
    task_runner.validate_configuration!

    @results << result.timed_run(set)

    if result.success?
      Log.info(result.msg)
    else
      Log.error(result.msg)
    end

    if try != properties["tries"] && !result.success
      Log.warn("Task failed on try %d/%d, sleeping %ds: %s" % [try, properties["tries"], properties["try_sleep"], result.msg])
      sleep(Integer(properties["try_sleep"]))
    end

    break if result.success
  end

  if hooks && !run_set("post_task")
    Log.warn("Failing task because a critical post_task hook failed")
    return false
  end

  result.success
end

#runner_for(type) ⇒ Object

TODO:

support types of runner



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# File 'lib/mcollective/util/playbook/tasks.rb', line 39

def runner_for(type)
  klass_name = "%sTask" % type.capitalize

  Tasks.const_get(klass_name).new(@playbook)
rescue NameError
  raise("Cannot find a handler for Task type %s" % type)
end