class Ufo::Stack::Status

Attributes

events[R]
hide_time_took[W]

Public Class Methods

new(stack_name) click to toggle source
# File lib/ufo/stack/status.rb, line 33
def initialize(stack_name)
  @stack_name = stack_name
  reset
end

Public Instance Methods

completed() click to toggle source
# File lib/ufo/stack/status.rb, line 73
def completed
  last_event_status =~ /(_COMPLETE|_FAILED)$/ &&
  @events[0]["resource_type"] == "AWS::CloudFormation::Stack"
end
event_time(timestamp) click to toggle source

stackoverflow.com/questions/18000432/rails-12-hour-am-pm-range-for-a-day

# File lib/ufo/stack/status.rb, line 119
def event_time(timestamp)
  Time.parse(timestamp.to_s).localtime.strftime("%I:%M:%S%p")
end
find_index(name) click to toggle source
# File lib/ufo/stack/status.rb, line 135
def find_index(name)
  send("#{name}_index")
end
find_update_failed_event() click to toggle source
# File lib/ufo/stack/status.rb, line 161
def find_update_failed_event
  i = @events.find_index do |event|
    event["resource_type"] == "AWS::CloudFormation::Stack" &&
    event["resource_status_reason"] == "User Initiated"
  end

  @events[0..i].reverse.find do |e|
    e["resource_status"] == "UPDATE_FAILED"
  end
end
last_event_status() click to toggle source
# File lib/ufo/stack/status.rb, line 78
def last_event_status
  @events[0]["resource_status"]
end
last_shown_index() click to toggle source
# File lib/ufo/stack/status.rb, line 146
def last_shown_index
  @events.find_index do |event|
    event["event_id"] == @last_shown_event_id
  end
end
messages_map() click to toggle source
# File lib/ufo/stack/status.rb, line 188
def messages_map
  {
    /CloudFormation cannot update a stack when a custom-named resource requires replacing/ => "A workaround is to run ufo again with STATIC_NAME=0 and to switch to dynamic names for resources. Then run ufo again with STATIC_NAME=1 to get back to statically name resources. Note, there are caveats with the workaround.",
    /cannot be associated with more than one load balancer/ => "There's was an issue updating the stack. Target groups can only be associated with one load balancer at a time. The workaround for this is to use UFO_FORCE_TARGET_GROUP=1 and run the command again. This will force the recreation of the target group resource.",
    /SetSubnets is not supported for load balancers of type/ => "Changing subnets for Network Load Balancers is currently not supported. You can try workarouding this with UFO_FORCE_ELB=1 and run the command again. This will force the recreation of the elb resource."
  }
end
print_event(e) click to toggle source
print_events(i) click to toggle source
refresh_events() click to toggle source

refreshes the loaded events in memory

# File lib/ufo/stack/status.rb, line 124
def refresh_events
  resp = cloudformation.describe_stack_events(stack_name: @stack_name)
  @events = resp["stack_events"]
rescue Aws::CloudFormation::Errors::ValidationError => e
  if e.message =~ /Stack .* does not exis/
    @stack_deletion_completed = true
  else
    raise
  end
end
reset() click to toggle source
# File lib/ufo/stack/status.rb, line 38
def reset
  @events = [] # constantly replaced with recent events
  @last_shown_event_id = nil
  @stack_deletion_completed = nil
end
rollback_error_message() click to toggle source
# File lib/ufo/stack/status.rb, line 172
def rollback_error_message
  return unless update_rollback?

  event = find_update_failed_event
  return unless event

  reason = event["resource_status_reason"]
  messages_map.each do |pattern, message|
    if reason =~ pattern
      return message
    end
  end

  reason # default message is original reason if not found in messages map
end
show_events(final=false) click to toggle source

Only shows new events

# File lib/ufo/stack/status.rb, line 83
def show_events(final=false)
  if @last_shown_event_id.nil?
    i = find_index(:start)
    print_events(i)
  else
    i = find_index(:last_shown)
    # puts "last_shown index #{i}"
    print_events(i-1) unless i == 0
  end

  return if final
  sleep 5 unless ENV['TEST']
  refresh_events
end
start_index() click to toggle source
# File lib/ufo/stack/status.rb, line 139
def start_index
  @events.find_index do |event|
    event["resource_type"] == "AWS::CloudFormation::Stack" &&
    event["resource_status_reason"] == "User Initiated"
  end
end
success?() click to toggle source
# File lib/ufo/stack/status.rb, line 152
def success?
  resource_status = @events[0]["resource_status"]
  %w[CREATE_COMPLETE UPDATE_COMPLETE].include?(resource_status)
end
update_rollback?() click to toggle source
# File lib/ufo/stack/status.rb, line 157
def update_rollback?
  @events[0]["resource_status"] == "UPDATE_ROLLBACK_COMPLETE"
end
wait() click to toggle source

check for /(_COMPLETE|_FAILED)$/ status

# File lib/ufo/stack/status.rb, line 45
def wait
  start_time = Time.now

  refresh_events
  until completed || @stack_deletion_completed
    show_events
  end
  show_events(true) # show the final event

  if @stack_deletion_completed
    puts "Stack #{@stack_name} deleted."
    return
  end

  if last_event_status =~ /_FAILED/
    puts "Stack failed: #{last_event_status}".color(:red)
    puts "Stack reason #{@events[0]["resource_status_reason"]}".color(:red)
  elsif last_event_status =~ /_ROLLBACK_/
    puts "Stack rolled back: #{last_event_status}".color(:red)
  else # success
    puts "Stack success status: #{last_event_status}".color(:green)
  end

  return if @hide_time_took
  took = Time.now - start_time
  puts "Time took for stack deployment: #{pretty_time(took).color(:green)}."
end