HTTP targets for blackbox-exporter became invalid since 0.18.0rc1

[Bregor]

Hello!

Sorry in advance if this really isn't an issue.

After update to 0.18.0rc1 previously valid targets for blackbox-exporter became invalid.

Related config fragment:

metrics_path: /probe
params:
  module: [http_2xx]

target_groups:
  - targets:
    - https://somewebsite.ru/health
    - https://api.somewebsite.ru/global/health
    - https://m.somewebsite.ru/health

After update there are log records like:

ERRO[0002] Target update failed: "https://somewebsite.ru/health" is not a valid hostname  source=targetmanager.go:293 target_group=0

[brian-brazil]

That is an invalid configuration, try it with the relabel_config.

[Bregor]

relabel_configs section:

relabel_configs:
  - source_labels: [__address__]
    regex: (.*)(:80)?
    target_label: __param_target
    replacement: ${1}
  - source_labels: [__param_target]
    regex: ^https?://([^/]+).*$
    target_label: instance
    replacement: ${1}
  - source_labels: [__meta_consul_node]
    regex: (.+)
    target_label: __address__
    replacement: ${1}

Is it wrong?

[brian-brazil]

Yes, you're not overriding the __address__ label. Look at the example on https://github.com/prometheus/blackbox_exporter#prometheus-configuration

[Bregor]

__address__ label always should be equal to address of blackbox-exporter?

[brian-brazil]

Yes, __address__ is what Prometheus actually talks to.

[Bregor]

Thank you so much!
Works like a charm.

[lock]

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