max_idle_duration could not be parsed as a time.Duration: 'time: unknown unit d in duration 1d

[kenwoodjw]

Describe the bug

Version

1. loki version 1.6.1
2. promtail version 1.6.1

Expected behavior

cat /etc/promtail/promtail.yml
 pipeline_stages:
  - match:
      selector: '{app="geoserver"} |~ ".*(error|ERROR|panic|PANIC|Exception).*"'
      stages:
      - regex: {expression: '.*(?P<error>(error|ERROR|Exception)).*'}
      - regex: {expression: '.*(?P<panic>(panic|PANIC)).*'}
      - metrics:
          error_total:
            config: {action: inc}
            description: total count of error
            max_idle_duration: 1d  
            source: error
            type: Counter

systemctl restart promtail
 promtail.service - Promtail service
   Loaded: loaded (/etc/systemd/system/promtail.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since 三 2021-01-06 10:21:27 CST; 1s ago
  Process: 868644 ExecStart=/usr/local/bin/promtail -config.file /etc/promtail/promtail.yml (code=exited, status=1/FAILURE)
 Main PID: 868644 (code=exited, status=1/FAILURE)

1月 06 10:21:26 localhost systemd[1]: Started Promtail service.
1月 06 10:21:27 localhost promtail[868644]: level=error ts=2021-01-06T02:21:27.084879466Z caller=main.go:106 msg="error creating promtail" error="failed to make file target manager: invalid match stage config: match stage failed to create pipeline from config: map[selector:{app=\"geoserver\"} |~ \".*(error|ERROR|panic|PANIC|Exception).*\" stages:[map[regex:map[expression:.*(?P<error>(error|ERROR|Exception)).*]] map[regex:map[expression:.*(?P<panic>(panic|PANIC)).*]] map[metrics:map[error_total:map[config:map[action:inc] description:total count of error max_idle_duration:1d source:error type:Counter]]] map[metrics:map[panic_total:map[config:map[action:inc] description:total count of panic max_idle_duration:1d source:panic type:Counter]]]]]: invalid metrics stage config: max_idle_duration could not be parsed as a time.Duration: 'time: unknown unit \"d\" in duration \"1d\"'"
1月 06 10:21:27 localhost systemd[1]: promtail.service: main process exited, code=exited, status=1/FAILURE
1月 06 10:21:27 localhost systemd[1]: Unit promtail.service entered failed state.
1月 06 10:21:27 localhost systemd[1]: promtail.service failed.

Source code:
https://github.com/grafana/loki/blob/c4faa579e33b33afa2c15bca72796d000e6b79fb/pkg/logentry/stages/metrics.go#L67```
use ParseDuration function
https://golang.org/pkg/time/#ParseDuration

ParseDuration parses a duration string. A duration string is a possibly signed sequence of decimal numbers, each with optional fraction and a unit suffix, such as "300ms", "-1.5h" or "2h45m". Valid time units are "ns", "us" (or "µs"), "ms", "s", "m", "h".

Question
Why document use 1d
#2335

[owen-d]

Good catch, this shouldn't use an unregistered unit.
fixed in #3124