promtool says config is valid when it isn't

[davidmankin]

promtool told me that this (snippet of) config was valid but Prometheus crashed trying to read it.

    relabel_configs:
   - source_labels: [__address__]
      #regex: "(.+):10255"
      target_label: node
      # replacement: "${1}"

Promtool says SUCCESS

$ promtool check-config prometheus-config/prometheus.yml
Checking prometheus-config/prometheus.yml
  SUCCESS: 0 rule files found

Prometheus crashes:

time="2016-03-03T19:21:53Z" level=error msg="Couldn't load configuration (-config.file=/etc/prometheus/prometheus.yml): relabel configuration requires a regular expression" source="main.go:208"

Further it would be useful if the error message explained specifically that it was a 'regex' field that was missing on line 92.

[juliusv]

Are they both from the same Prometheus version? Relabel configs don't need an explicitly specified regex field anymore since Prometheus 0.17.0, so if your promtool is 0.17.0, but your Prometheus is older, you will hit this problem.

[juliusv]

(meaning, there is now a default regex of (.*) when nothing is specified)

[davidmankin]

Oops, nope. My prometheus is v0.16.2 and I just got promtool with "go get" so it's probably newer.

I can't tell what version my promtool is:

$ go-venv/bin/promtool version
prometheus, version  (branch: , revision: )
  build user:
  build date:
  go version:

[juliusv]

Yeah, the version information is only filled in when building Prometheus or promtool via make.

[lock]

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