grafana: account for long backup jobs in Prom. hyperv. disk rw rate al.

resources/chaosknoten/grafana/docker_compose/prometheus_alerts.rules.yaml

@@ -166,7 +166,7 @@ groups:
       # Longer intervals to account for disk intensive hypervisor tasks (backups, moving VMs, etc.).
       - alert: HypervisorHostUnusualDiskReadRate
         expr: (sum by (instance) (rate(node_disk_read_bytes_total[2m])) / 1024 / 1024 > 50) * on(instance) group_left (nodename) node_uname_info{nodename="chaosknoten"}
-        for: 30m
+        for: 60m
         labels:
           severity: warning
         annotations:
@@ -174,7 +174,7 @@ groups:
           description: "Disk is probably reading too much data (> 50 MB/s)\n  VALUE = {{ $value }}"
       - alert: HypervisorHostUnusualDiskWriteRate
         expr: (sum by (instance) (rate(node_disk_written_bytes_total[2m])) / 1024 / 1024 > 50) * on(instance) group_left (nodename) node_uname_info{nodename="chaosknoten"}
-        for: 20m
+        for: 60m
         labels:
           severity: warning
         annotations: