External Labels not accessible in alert rules.

[Sohaib Omar]

Hi,

I have set external labels as below in my Prometheus configuration.

externalLabels:

    deployment_env: dev

    org_id: myOrganization

...

and in my rules.yaml I am trying to access external labels like below.

- alert: ClusterCapacityWarning

annotations:

summary: "Available capacity of cluster on {{ $externalLabels.deployment_env }} is Low."

description: "Capacity of cluster {{ $externalLabels.org_id }} is less than 20%."

expr: |

(cluster_resource_capacity_available < 20)

for: 5m

labels:

severity: warning

but doing above I get the error function externalLabels.deployment_env not found

what am I doing wrong? Have anyone been in a similar situation before?

Even in Prometheus docs states that The configured external labels can be accessed via the $externalLabels variable.

Thanks

[Julius Volz]

Hi,

Are you using a recent version of Prometheus? Being able to access external labels from alert templates was added in https://github.com/prometheus/prometheus/pull/5463 a year ago (see https://github.com/prometheus/prometheus/blob/master/CHANGELOG.md#2100--2019-05-25).

Cheers,

Julius

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