Prometheus

The Prometheus Check connects to the Prometheus host, performs the desired query, and displays the results.

apiVersion: canaries.flanksource.com/v1
kind: Canary
metadata:
  name: prometheus-check
spec:
  interval: 30
  prometheus:
    - url: http://prometheus-k8s.monitoring.svc:9090
      query: kubernetes_build_info{job!~"kube-dns|coredns"}
      display:
        template: "{{ (index .results 0).git_version }}"
      test:
        template: "true"

Field	Description	Scheme	Required
url	Address of the Prometheus server	string	Yes
query	PromQL query	string	Yes
name	Name of the check, must be unique within the canary	string	Yes
description	Description for the check	string
icon	Icon for overwriting default icon on the dashboard	string
labels	Labels for check	map[string]string
test	Evaluate whether a check is healthy	Expression
display	Expression to change the formatting of the display	Expression
transform	Transform data from a check into multiple individual checks	Expression
metrics	Metrics to export from	[]Metrics
connection	Path of existing connection e.g. connection://prometheus/instance Mutually exclusive with url	Connection
url	Redis hostname and port
username		EnvVar
password		EnvVar

Result Variables

Name	Description	Scheme
value		float
firstValue	Number of rows returned	int
results	A list of results	[]map[string]interface{ }