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add cAdvisor and document detailed alert queries in README

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Add cAdvisor container to the monitoring stack for container-level
metrics. Configure Alloy to scrape cAdvisor. Expand the README
Recommended Alerts section with exact PromQL/LogQL queries, thresholds,
and Grafana alert rule configuration for all five alerts.
This commit is contained in:
Thomas Gräfenstein
2026-03-22 22:51:22 +01:00
parent c736c23e9a
commit 926766346c
3 changed files with 114 additions and 8 deletions
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12
monitoring/config.alloy
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@@ -54,6 +54,18 @@ prometheus.scrape "node" {
scrape_interval = "60s"
}
// ============================================================
// cAdvisor container metrics -> Grafana Cloud Prometheus
// ============================================================
prometheus.scrape "cadvisor" {
targets = [{"__address__" = "cadvisor:8080"}]
forward_to = [prometheus.remote_write.grafana_cloud.receiver]
scrape_interval = "60s"
metrics_path = "/metrics"
}
prometheus.remote_write "grafana_cloud" {
endpoint {
url = env("GRAFANA_CLOUD_PROMETHEUS_URL")