Docker input: add container state metrics

[stanch]

Would be nice to have state metrics for each container, as exemplified by this JSON:

{
  "Running": 1,
  "Paused": 0,
  "Restarting": 0,
  "OOMKilled": 0,
  "Dead": 0
}

This information is available through docker inspect <container> (and I imagine through the API as well).

For the record, here's an abomination I'm using right now:

[[inputs.exec]]
  commands = [
    "sh -c \"docker inspect container1 | jq 'def b2i: if . then 1 else 0 end; .[] | { name: .Name, running: .State.Running | b2i, paused: .State.Paused | b2i, restarting: .State.Restarting | b2i }'\""
  ]

  data_format = "json"

  # measurement name suffix (for separating different commands)
  name_suffix = "_container1"

[jeromegn]

This would also make it possible to get display better charts for setups that don't cleanup dead containers so often.

[stanch]

Hi, I don’t think the issue should be closed. The merged commit only adds global container state metrics (see https://github.com/influxdata/telegraf/pull/1791/files#diff-691fdaed73e36497110e1ea47c1498f5R157), while the issue was about per-container metrics.

[prashanthjbabu]

Hi,I'd like to know if per container state metrics is supported now by any chance or if there's any plan to support it ?

[prashanthjbabu]

I've attempted to implement this in the following pull request #4259 . I hope this helps!

[GeorgeMac]

Delivered in #4259