Telegraf & InfluxDB:如何将PROCSTAT的pid从字段转换为标记？

Question

摘要：--我正在使用telegraf将procstat导入InfluxDB。我想把pid从一个整数字段转换成一个标签，这样我就可以在内流中对它进行分组。

详细信息:经过大量搜索后，我在某个站点上找到了以下内容，但它似乎在做相反的事情(将标记转换为字段)。我不知道如何从它推断相反的转换语法：

[processors]
[[processors.converter]]
namepass = [ "procstat",]

[processors.converter.tags]
string = [ "cmdline",]

我用的是1.7.9

Answer 1

要将pid转换为标记的正确处理器配置如下。

[processors]
  [[processors.converter]]
     namepass = [ "procstat"]

  [processors.converter.fields]
     tag = [ "pid"]

请参阅转换器处理器插件https://github.com/influxdata/telegraf/tree/master/plugins/processors/converter的文档。

在telegraf的最新版本中，可以通过在输入插件配置中指定pid作为标记存储它。这里不需要转换器处理器。

在配置中提到pid_tag = true。但是，当进程短暂存在时，请注意将pid作为标记对性能的影响。

P.S:你应该把你的telegraf版本升级到1.14.5。在这个版本中，procstat插件有一个性能改进补丁。

插件配置参考https://github.com/influxdata/telegraf/tree/master/plugins/inputs/procstat

样例配置

# Monitor process cpu and memory usage
[[inputs.procstat]]
  ## PID file to monitor process
  pid_file = "/var/run/nginx.pid"
  ## executable name (ie, pgrep <exe>)
  # exe = "nginx"
  ## pattern as argument for pgrep (ie, pgrep -f <pattern>)
  # pattern = "nginx"
  ## user as argument for pgrep (ie, pgrep -u <user>)
  # user = "nginx"
  ## Systemd unit name
  # systemd_unit = "nginx.service"
  ## CGroup name or path
  # cgroup = "systemd/system.slice/nginx.service"

  ## Windows service name
  # win_service = ""

  ## override for process_name
  ## This is optional; default is sourced from /proc/<pid>/status
  # process_name = "bar"

  ## Field name prefix
  # prefix = ""

  ## When true add the full cmdline as a tag.
  # cmdline_tag = false

  ## Add the PID as a tag instead of as a field.  When collecting multiple
  ## processes with otherwise matching tags this setting should be enabled to
  ## ensure each process has a unique identity.
  ##
  ## Enabling this option may result in a large number of series, especially
  ## when processes have a short lifetime.
  # pid_tag = false