Class: Stax::Cmd::Logs

Inherits:
SubCommand show all
Defined in:
lib/stax/mixin/logs.rb

Instance Method Summary collapse

Methods inherited from SubCommand

#info, stax_info, stax_info_tasks

Instance Method Details

#cleanup ⇒ Object

lambdas create their own log groups, and when we delete stack they are left behind; this task looks up their names by stack prefix, and deletes them



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# File 'lib/stax/mixin/logs.rb', line 165

desc 'cleanup', 'cleanup lambda log groups named for stack'

#events(stream = nil) ⇒ Object 



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# File 'lib/stax/mixin/logs.rb', line 70

def events(stream = nil)
  trap('SIGINT', 'EXIT')    # clean exit with ctrl-c
  group  = ((g = options[:group]) ? log_groups[g] : log_groups.values.first).log_group_name
  stream ||= latest_stream(group).log_stream_name

  debug("Log stream #{group}/#{stream}")
  token = nil
  loop do
    resp = Aws::Logs.client.get_log_events(
      log_group_name: group,
      log_stream_name: stream,
      limit: options[:numlines],
      next_token: token,
    )
    resp.events.each do |e|
      puts("#{set_color(human_time(e.timestamp).utc, :green)}  #{e.message}")
    end
    token = resp.next_forward_token
    options[:follow] ? sleep(options[:sleep]) : break
  end
end

#filter ⇒ Object 



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# File 'lib/stax/mixin/logs.rb', line 136

def filter
  trap('SIGINT', 'EXIT')    # clean exit with ctrl-c
  group = ((g = options[:group]) ? log_groups[g] : log_groups.values.first).log_group_name
  debug("Log group #{group}")

  start_time = options[:start] ? Time.parse(options[:start]).to_i*1000 : nil
  end_time   = options[:end]   ? Time.parse(options[:end]).to_i*1000   : nil
  token = nil
  loop do
    resp = Aws::Logs.client.filter_log_events(
      log_group_name: group,
      log_stream_names: options[:streams],
      next_token: token,
      start_time: start_time,
      end_time: end_time,
      filter_pattern: options[:pattern],
    )
    resp.events.each do |e|
      time   = set_color(human_time(e.timestamp).utc, :green)
      stream = set_color(e.log_stream_name, :blue)
      puts("#{time}  #{stream}  #{e.message}")
    end
    token = resp.next_token
    break unless token
  end
end

#groups ⇒ Object 



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# File 'lib/stax/mixin/logs.rb', line 41

def groups
  print_table log_groups.map { |id, g|
    [id, g.log_group_name, g.retention_in_days, human_time(g.creation_time), human_bytes(g.stored_bytes)]
  }
end

#streams ⇒ Object 



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# File 'lib/stax/mixin/logs.rb', line 50

def streams
  log_groups.each do |id, group|
    debug(group.log_group_name)
    streams = Aws::Logs.streams(
      log_group_name: group.log_group_name,
      order_by: options[:alpha] ? :LogStreamName : :LastEventTime,
      descending: !options[:alpha], # most recent first
      limit: options[:limit],
    )
    print_table streams.map { |s|
      [s.log_stream_name, human_time(s.last_event_timestamp), human_bytes(s.stored_bytes)]
    }
  end
end

#tail ⇒ Object 



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# File 'lib/stax/mixin/logs.rb', line 95

def tail
  trap('SIGINT', 'EXIT')    # clean exit with ctrl-c
  group  = ((g = options[:group]) ? log_groups[g] : log_groups.values.first).log_group_name

  debug("Log group #{group}")
  token = nil
  start_time = Time.now.to_i - 30 # start 30 sec ago

  loop do
    end_time = Time.now.to_i
    resp = Aws::Logs.client.filter_log_events(
      log_group_name: group,
      log_stream_names: options[:streams],
      start_time: start_time * 1000, # aws needs msec
      end_time: end_time * 1000,
      next_token: token,
      interleaved: true,
    )

    ## pretty-print the events
    resp.events.each do |e|
      puts("#{set_color(human_time(e.timestamp).utc, :green)}  #{set_color(e.log_stream_name, :blue)}  #{e.message}")
    end

    ## token means more data available from this request, so loop and get it right away
    token = resp.next_token

    ## no token, so sleep and start next request from end time of this one
    unless token
      start_time = end_time
      sleep 10
    end
  end
end