Class: Awful::CloudWatchLogs

Inherits:
Cli show all
Defined in:
lib/awful/cloudwatch_logs.rb

Instance Method Summary collapse

Methods inherited from Cli

#initialize

Constructor Details

This class inherits a constructor from Awful::Cli

Instance Method Details

#create(name) ⇒ Object 



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# File 'lib/awful/cloudwatch_logs.rb', line 45

def create(name)
  logs.create_log_group(log_group_name: name)
end

#delete(name) ⇒ Object 



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# File 'lib/awful/cloudwatch_logs.rb', line 50

def delete(name)
  logs.delete_log_group(log_group_name: name)
end

#events(group, nth = 0) ⇒ Object 



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# File 'lib/awful/cloudwatch_logs.rb', line 113

def events(group, nth = 0)
  opt = options.dup
  opt[:stream] ||= latest_stream(group, nth).log_stream_name # use latest stream if none requested

  ## magical tail option returns up to requested number of last events
  if opt[:tail]
    opt[:head]  = false
    opt[:pages] = 1
    opt[:limit] = opt[:tail]
  end

  next_token = nil
  events = []
  pages = 0
  loop do
    response = logs.get_log_events(
      log_group_name:  group,
      log_stream_name: opt[:stream],
      start_from_head: opt[:head],
      limit:           opt[:limit],
      next_token:      next_token,
    )

    break if response.events.count == 0 # break on no results as token does not get to nil
    events = events + response.events

    pages += 1
    break if pages >= opt[:pages]

    next_token = response.next_backward_token
    break if next_token.nil? # not sure if this is ever set to nil
  end

  events.output do |ev|
    if options[:long]
      print_table ev.map { |e| [Time.at(e.timestamp.to_i/1000), e.message] }
    else
      puts ev.map(&:message)
    end
  end
end

#latest(group, n = 0) ⇒ Object 



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# File 'lib/awful/cloudwatch_logs.rb', line 100

def latest(group, n = 0)
  latest_stream(group, n).output do |stream|
    puts stream.log_stream_name
  end
end

#ls(prefix = nil) ⇒ Object 



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# File 'lib/awful/cloudwatch_logs.rb', line 17

def ls(prefix = nil)
  next_token = nil
  log_groups = []
  loop do
    response = logs.describe_log_groups(log_group_name_prefix: prefix, next_token: next_token)
    log_groups = log_groups + response.log_groups
    next_token = response.next_token
    break if next_token.nil?
  end

  ## return and output groups
  log_groups.output do |groups|
    if options[:long]
      print_table groups.map { |group|
        [
          group.log_group_name,
          group.retention_in_days,
          Time.at(group.creation_time.to_i/1000),
          group.stored_bytes,
        ]
      }
    else
      puts groups.map(&:log_group_name)
    end
  end
end

#streams(group, prefix = nil) ⇒ Object 



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# File 'lib/awful/cloudwatch_logs.rb', line 58

def streams(group, prefix = nil)
  next_token = nil
  log_streams = []
  loop do
    response = logs.describe_log_streams(
      log_group_name: group,
      log_stream_name_prefix: prefix,
      order_by: options[:alpha] ? 'LogStreamName' : 'LastEventTime',
      descending: (not options[:alpha]), # want desc order if by time for most recent first
      limit: options[:limit],
      next_token: next_token
    )
    log_streams = log_streams + response.log_streams
    next_token = response.next_token
    break if next_token.nil?
    break if log_streams.count >= options[:limit].to_i
  end
  log_streams.output do |streams|
    if options[:long]
      print_table streams.map { |s|
        [ s.log_stream_name, Time.at(s.creation_time.to_i/1000), Time.at(s.last_event_timestamp.to_i/1000) ]
      }
    else
      puts streams.map(&:log_stream_name)
    end
  end
end