Remove Kube*Overcommit alerts

Author: vulkoingim

Diff for: .github/CODEOWNERS

@@ -88,6 +88,7 @@
 /dev/loadgen @gitpod-io/engineering-workspace
 /dev/preview @gitpod-io/devx
 /operations/observability/mixins @gitpod-io/engineering-delivery-operations-experience
+/operations/observability/mixins/platform @gitpod-io/devx
 /operations/observability/mixins/IDE @gitpod-io/engineering-ide
 /operations/observability/mixins/meta @gitpod-io/engineering-webapp
 /operations/observability/mixins/workspace @gitpod-io/engineering-workspace

Diff for: operations/observability/mixins/platform/rules/kubernetes/kubernetes.yaml

@@ -49,32 +49,6 @@ spec:
       labels:
         severity: warning
         team: platform
-    - alert: KubeCPUOvercommit
-      annotations:
-        description: Cluster has overcommitted CPU resource requests for Pods by {{ $value }} CPU shares and cannot tolerate node failure.
-        summary: Cluster has overcommitted CPU resource requests.
-        dashboard_url: https://grafana.gitpod.io/d/efa86fd1d0c121a26444b636a3f509a8
-      expr: |
-        sum(namespace_cpu:kube_pod_container_resource_requests:sum{}) - (sum(kube_node_status_allocatable{resource="cpu"}) - max(kube_node_status_allocatable{resource="cpu"})) > 0
-        and
-        (sum(kube_node_status_allocatable{resource="cpu"}) - max(kube_node_status_allocatable{resource="cpu"})) > 0
-      for: 60m
-      labels:
-        severity: warning
-        team: platform
-    - alert: KubeMemoryOvercommit
-      annotations:
-        description: Cluster has overcommitted memory resource requests for Pods by {{ $value | humanize }} bytes and cannot tolerate node failure.
-        summary: Cluster has overcommitted memory resource requests.
-        dashboard_url: https://grafana.gitpod.io/d/efa86fd1d0c121a26444b636a3f509a8
-      expr: |
-        sum(namespace_memory:kube_pod_container_resource_requests:sum{}) - (sum(kube_node_status_allocatable{resource="memory"}) - max(kube_node_status_allocatable{resource="memory"})) > 0
-        and
-        (sum(kube_node_status_allocatable{resource="memory"}) - max(kube_node_status_allocatable{resource="memory"})) > 0
-      for: 60m
-      labels:
-        severity: warning
-        team: platform
     - alert: KubePersistentVolumeFillingUp
       annotations:
         description: The PersistentVolume claimed by {{ $labels.persistentvolumeclaim }} in Namespace {{ $labels.namespace }} is only {{ $value | humanizePercentage }} free.