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

Question

总结：我正在使用 telegraf 将 procstat 导入 InfluxDB。 我想将 pid 从整数字段转换为 TAG，以便在 Influx 中对其进行分组。

详情： 经过大量搜索后，我在某个站点上找到了以下内容，但它似乎正在做相反的事情（将标签转换为字段）。我不确定如何从中推断出相反的转换语法：

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

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

我正在使用 Influx 1.7.9

Answer 1

将pid转换为标签的正确处理器配置如下。

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

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

请参考转换器处理器插件的文档 https://github.com/influxdata/telegraf/tree/master/plugins/processors/converter

在最新版本的电报 pid 可以通过在输入插件配置中指定它来存储为标签。这里不需要转换器处理器。

在配置中提及pid_tag = true。但是请注意，当进程生命周期较短时，将 pid 作为标签对性能的影响。

P.S：您应该尝试将您的电报版本升级到 1.14.5。此版本中有针对 procstat 插件的性能改进修复。

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

示例配置。

# 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