在 prometheus helm chart values.yaml 中配置 alertmanager 警报

Question

I want to connect prometheus to alertmanager and I'm facing a problem with configuring alertmanager alerting endpoints in values.yaml helm chart.
I tried it before with docker-compose and it worked but it's different with helm charts.

I downloaded the official helm chart for prometheus that includes alertmanager I configured the services and the targets to scrape but I can't find where to specify alertmanager to prometheus to try to forward the alerts and send it by slack.

Answer 1

The easiest configuration is set the configMapOverride: https://github.com/helm/charts/blob/da8b2fa27f81a4a4d44e1ac320f9081a5948224e/stable/prometheus/values.yaml#L68

After configuring this, you must create a configMap with all configuration like a usually alertmanager: https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/prometheus/alertmanager-configmap.yaml

Answer 2

If you already moved to kube-prometheus-stack , you could try the following steps:

1. create a values.yaml

    # values.yaml alertmanager: config: global: resolve_timeout: 5m # The API URL to use for Slack notifications. [ slack_api_url: <secret> ] [ slack_api_url_file: <filepath> ]

2. apply or upgrade your release

   helm install|upgrade [RELEASE] prometheus-community/kube-prometheus-stack -f values.yaml

REF:

• https://github.com/prometheus-operator/kube-prometheus#alertmanager-configuration
• https://github.com/prometheus-community/helm-charts/blob/main/charts/kube-prometheus-stack/values.yaml#L150-L170
• https://prometheus.io/docs/alerting/latest/configuration/#configuration-file