Prometheus cannot unmarshal !!map into []*config.FileSDConfig

[aali1]

Environment

• System information:
  Linux 3.10.0-327.36.3.el7.x86_64 x86_64

• Prometheus version:

prometheus, version 1.4.1 (branch: master, revision: 2a89e87)
build user: root@e685d23d8809
build date: 20161128-09:59:22
go version: go1.7.3

• Prometheus configuration file:

global:
  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).

  # Attach these labels to any time series or alerts when communicating with
  # external systems (federation, remote storage, Alertmanager).
  external_labels:
      monitor: 'codelab-monitor'

# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  # - "first.rules"
  # - "second.rules"

# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  - job_name: 'prometheus'

    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.
    file_sd_configs:
      names:
        - 'tgconf.json'
      job_name: 'file_sd'

• I also tried

    file_sd_configs:
      names: ['tgconf.json']
      job_name: 'file_sd'

• tgconf.json

[
  {
    "targets": ["localhost:9090", "reporting-01.lab.aws:9100"],
    "labels": {
      "job": "my_servers"
    }
  }
]

• Logs:

INFO[0000] Starting prometheus (version=1.4.1, branch=master, revision=2a89e8733f240d3cd57a6520b52c36ac4744ce12)  source=main.go:77
INFO[0000] Build context (go=go1.7.3, user=root@e685d23d8809, date=20161128-09:59:22)  source=main.go:78
INFO[0000] Loading configuration file prometheus.yml     source=main.go:250
ERRO[0000] Error loading config: couldn't load configuration (-config.file=prometheus.yml): yaml: unmarshal errors:
  line 25: cannot unmarshal !!map into []*config.FileSDConfig  source=main.go:152

[juliusv]

That's not a valid file_sd_configs section (it's a single item, not a list, and the field names are off). Take a look at a valid file-SD config section here: https://github.com/prometheus/prometheus/blob/master/config/testdata/conf.good.yml#L32-L39

[aali1]

Thanks @juliusv it worked! By the way, when to use dash (-) and when not to?

[lock]

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