来自 Graylog2 的电子邮件通知

Question

我的客户设置了 Greylog2 服务器来汇总我们的日志文件。我们定义了几个流。

我希望每天发送电子邮件通知 - 至少“系统在过去 24 小时内收到 x 个错误”，最好是前十个最常见错误的列表。

以前有没有人实现过类似的东西 - 你能提供任何提示或建议吗？我在一些论坛帖子中看到提到了 REST api，但找不到更多信息...

Answer 1

在我的工作场所，我们配置了基于 rake 任务 + crontab 的警报任务。这是在 graylog2-server 中的警报 API 可用之前 (plugin directory)。我们仍然使用 rake 任务，因为它们让我们可以使用 rails 模型和控制器。

将以下内容添加到general.yaml中，以便我们可以找到流ID。

# section in general.yaml

streamalarms:
  error_stream: 50ef145471de3516b900000d

以下是实际的rake任务：

namespace :gl2rake

    # Helper method for recording how long jobs took, which is used to debug / tune the jobs.
    def monitoring_wrapper(task)
    btime = Time.now
    task_name = task.name
    task_starting(task_name)

    if block_given?
      yield
    else 
      puts "No block given to monitoring_wrapper!"
    end

    etime = Time.now
    duration = (etime - btime)
    puts "Time elapsed: #{duration} seconds"
    task_completed(task_name, duration)
  end

    desc "Send an email if a job is written to the error queue. If there are more than 5 errored jobs in the last 6 minutes then send sms"
  task :error_queue => :environment do |task|
    monitoring_wrapper(task) do

      # the streams to check
      # I have customised the configuration class so that all of the stream ids are available. This can be automated.
      streams = Configuration.streamalarm_config('error_stream', '')

      # this method has been added to app/models/configuration.rb as a convenience.
      # def self.streamalarm_config(key, default)
      #   nested_general_config :streamalarms, key, default
      # end

      # get unix epoch time of 6 minutes ago
      six_mins_ago = 6.minutes.ago

      filters = {
        # optionally apply a message filter to the stream
        :message => "\"Writing job to error queue.\"",
        :date => "from #{six_mins_ago}" 
      }

      # get the stream
      stream = Stream.find_by_id(stream_id)

      if !stream
        $stderr.puts "Invalid stream id #{stream_id}"
        next
      end

      messages = MessageGateway.all_by_quickfilter(filters, nil, {:stream_id => stream_id})

      if messages.size > 0

        #alert - jobs written to error queue
        if messages.size > 5
            # send_sms_for_stream is a custom method we wrote that hooks into an sms api.
          send_sms_for_stream("There are #{messages.size} errored job(s) in the last 6 minutes. Check email for details", 'error_queue', stream.title)
        end

        message = "There are #{messages.size} errored job(s) in the last 6 minutes. (Stream #{stream.title})\n"

        messages.each do |m|
          message += "\t#{m.message}\n"
        end

        # sends an email to our designated alerting email
        send_mail("There are  #{messages.size} errored job(s)", message, 'error_queue', stream.title)
      end
    end
  end
end

现在可以通过 cron 作业调用它：例如

3-59/5 * * * * sudo rake -f /opt/graylog2-web-interface/Rakefile gl2rake:error_queue RAILS_ENV=production