Fluentd從tag字段分割提取新字段

• "_index": "logstash-2016.10.19",
• "_type": "fluentd",
• "_id": "AVfcB42cEKo1rP0QdbCf",
• "_version": 1,
• "_score": 1,
• "_source": {
  • "message": "test31",
  • "pod_name": "test",
  • "namespace_name": "default",
  • "container_name": "test",
  • "container_id": "286ca6a92d26b46342860b19cbba3406f7e9d3d8df41e3497d7f09d055495424",
  • "logdir": "3.log",
  • "tag":"k8s.applog.test_default.test.286ca6a92d26b46342860b19cbba3406f7e9d3d8df41e3497d7f09d055495424.log.3.log",
  • "@timestamp": "2016-10-19T16:21:03+08:00"
  }

<source>  type tail
  format none
  path /var/log/containers/applog*/*
  pos_file /var/log/es-containers-app.log.pos
  time_format %Y-%m-%dT%H:%M:%S.%NZ
  tag reform.*
  read_from_head true
</source>


<match reform.**>
  type record_reformer
  renew_record false
  enable_ruby true
  tag k8s.${tag_suffix[4]}
  <record>
    pod_name ${tag_suffix[5].split('_')[0]}
    namespace_name ${tag_suffix[5].split('_')[1].split('.')[0]}
    container_name ${tag_suffix[6].split('.')[0]}
    container_id ${tag_suffix[7].split('.')[0]}
    logdir ${tag_suffix[9]}
  </record>

</match>

    //軟鏈接/var/lib/kubelet/pods 獲取容器的pod名，用於Elasticsearch日誌蒐集服務

    // /var/lib/kubelet/pods/+podUID+/volumes/kubernetes.io~empty-dir/logdir ->/var/log/containers/applog_podName_containerName_id.log

    //glog.Errorf("pod.Spec.Volumes[0] :%s", len(pod.Spec.Volumes))

    for i := 0; i < len(pod.Spec.Volumes); i++ {

        if pod.Spec.Volumes[i].EmptyDir != nil {

            emptydirname := pod.Spec.Volumes[i].Name

            cname := container.Name

            str := "logdir" + cname

            if emptydirname == str && cname != "POD" {

                podUID := kubecontainer.GetPodUID(pod)

                containerLogFile_emptdir := path.Join("/var/lib/kubelet/pods", podUID, "volumes/kubernetes.io~empty-dir", emptydirname)

                symlinkFile_emptdir := LogSymlink_emptdir(dm.containerLogsDir, kubecontainer.GetPodFullName(pod), container.Name, id.ID)

                if err = dm.os.Symlink(containerLogFile_emptdir, symlinkFile_emptdir); err != nil {

                    glog.Errorf("Failed to create symbolic link to the application's log file of pod %q container %q: %v", format.Pod(pod), container.Name, err)

                }

            }

        }

    }