Flagger MS Teams Alerting Not Working as Expected

[claudiu-albu]

@stefanprodan

We do have support for MS Teams by setting type: msteams in the AlertProvider, docs here: https://docs.flagger.app/usage/alerting#canary-configuration

I'm trying exactly this with following setup:

Flagger AlertProvider:

apiVersion: flagger.app/v1beta1
kind: AlertProvider
metadata:
  name: msteams-notifs
  namespace: flagger
spec:
  type: msteams
  secretRef:
    name: msteams-webhook

Flagger HelmRelease:

apiVersion: helm.toolkit.fluxcd.io/v2
kind: HelmRelease
metadata:
  name: flagger
  namespace: flagger
spec:
  interval: 5m
  chart:
    spec:
      chart: flagger
      version: 1.38.0
      sourceRef:
        kind: HelmRepository
        name: flagger
        namespace: flagger
      interval: 1m
  install:
    remediation:
      retries: 3
  upgrade:
    remediation:
      remediateLastFailure: false
  values:
    meshProvider: istio
    metricsServer: http://kube-prometheus-stack-prometheus.monitoring.svc.cluster.local:9090
    clusterName: "${project}-${environment_name}"

and added this bit to Flagger Canary, in spec.analysis:

    alerts:
      - name: "MS Teams Notifications"
        severity: info
        providerRef:
          name: msteams-notifs
          namespace: flagger

I may not be entirely clear about what documentation explains,
but I can't for the life of me make it send MS Teams notifications other than:

and:

(these might as well be generated by underlying FluxCD alerting given their title "FluxCD Alerts". not entirely sure at the moment.)

this is a typical output for my canary deployment testing:

but even when I make Canary fail altogether, I still don't get anything corresponding in MS Teams, like documentation shows here:

while using setup shown above, I don't get any errors in Flagger k8s pod either while Canary deployment is running.

in Flagger HelmRelease, in spec.values, I've also tried using:

    env:
    - name: MSTEAMS_URL
      valueFrom:
       secretKeyRef:
         name: msteams-webhook
         key: address

or:

    msteams:
      url: <MSTEAMS_WEBHOOK_URL>

but this only results in making error "Error sending event to webhook Summary or Text is required for MSTeams" show up in Flagger pod logs again.

so am I getting it wrong in terms of what Flagger MS Teams alerting does?
what can I actually make Flagger alert on in MS Teams notifications?

Additional context

• Flagger version: 1.38.0
• Kubernetes version: 1.28.11
• Service Mesh provider: Istio

any input would be greatly appreciated.
thanks in advance,
Claudiu

Originally posted by @claudiu-albu in #1140 (comment)