Quiz: alerts

Question 1 of 9

An alert rule from the file to firing: rule_files, an expression with a threshold, for, promtool check rules and rereading the configuration; Alertmanager: group_by and the timers, an amtool silence, the routing tree. The questions follow the lessons “An alert rule: threshold and duration” and “Alertmanager: to whom and how many times”.

9 questions · threshold 70%

Read the output

The /etc/prometheus/rules/disk.yml file with the rule is in place and passes `promtool check rules`. What makes Prometheus check it?

$ grep -A1 rule_files /etc/prometheus/prometheus.yml
rule_files:
  # - "first.rules"
$ curl -s localhost:9090/api/v1/rules | jq .data
{
  "groups": []
}

Restart node_exporter so it serves the metrics again.
Rename the file to first.rules, as in the package example.
Wait: rules get picked up at the next scrape.
Put the file or a directory pattern into rule_files and make Prometheus reread its configuration.

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Quiz: alerts

The /etc/prometheus/rules/disk.yml file with the rule is in place and passes promtool check rules. What makes Prometheus check it?

The /etc/prometheus/rules/disk.yml file with the rule is in place and passes `promtool check rules`. What makes Prometheus check it?