query_log_file config is not effective

[Chari]

Hi All, 

We have below prometheus.yaml config for enabling query_log_file 

 global:
      scrape_interval: 1m
      scrape_timeout: 10s
      evaluation_interval: 2m
      query_log_file: /prometheus/query.log
      external_labels:
        prometheus: monitoring/k8s
        prometheus_replica: prometheus-k8s-0
    alerting:
      alert_relabel_configs:
      - separator: ;
        regex: prometheus_replica
        replacement: $1
        action: labeldrop
    remote_read:
    - url: http://influx.db?user=user&pwd=pwd
      read_recent: true
      remote_timeout: 1m

But no file with name `/prometheus/query.log` is created. 

Prometheus has write permission to this directory. Pls let me know what else I have to do to get query logs written to the configured file.

Regards,
Raghav 

[Julius Volz]

Hi Raghav,

It works for me, could you share which Prometheus version you are running? And are there any errors in the log output of Prometheus itself? Although Prometheus should not even start if that file cannot get created...

Btw., your pasted YAML doesn't seem to be indented correctly, at least starting at the "alerting" section, but I bet that's just a copy&paste issue.

Regards,

Julius

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Julius Volz

PromLabs - promlabs.com