charts: make honorTimestamps configurable for linkerd-proxy PodMonitor

charts/linkerd-control-plane/templates/podmonitor.yaml

@@ -22,6 +22,9 @@ spec:
   podMetricsEndpoints:
     - interval: {{ $podMonitor.scrapeInterval }}
       scrapeTimeout: {{ $podMonitor.scrapeTimeout }}
+      {{- if not (kindIs "invalid" $podMonitor.controller.honorTimestamps) }}
+      honorTimestamps: {{ $podMonitor.controller.honorTimestamps }}
+      {{- end }}
       relabelings:
         - sourceLabels:
             - __meta_kubernetes_pod_container_port_name
@@ -60,6 +63,9 @@ spec:
   podMetricsEndpoints:
     - interval: {{ $podMonitor.scrapeInterval }}
       scrapeTimeout: {{ $podMonitor.scrapeTimeout }}
+      {{- if not (kindIs "invalid" $podMonitor.serviceMirror.honorTimestamps) }}
+      honorTimestamps: {{ $podMonitor.serviceMirror.honorTimestamps }}
+      {{- end }}
       relabelings:
         - sourceLabels:
             - __meta_kubernetes_pod_label_linkerd_io_control_plane_component
@@ -99,6 +105,9 @@ spec:
   podMetricsEndpoints:
     - interval: {{ $podMonitor.scrapeInterval }}
       scrapeTimeout: {{ $podMonitor.scrapeTimeout }}
+      {{- if not (kindIs "invalid" $podMonitor.proxy.honorTimestamps) }}
+      honorTimestamps: {{ $podMonitor.proxy.honorTimestamps }}
+      {{- end }}
       relabelings:
         - sourceLabels:
             - __meta_kubernetes_pod_container_name

charts/linkerd-control-plane/values.yaml

@@ -722,12 +722,22 @@ podMonitor:
       matchNames:
         - {{ .Release.Namespace }}
         - linkerd-viz
+    # -- Sets honorTimestamps for the control-plane PodMonitor endpoint. When set to false
+    # Prometheus uses scrape time instead of exporter-provided timestamps.
+    honorTimestamps: false
   serviceMirror:
     # -- Enables the creation of PodMonitor for the Service Mirror component
     enabled: true
+    # -- Sets honorTimestamps for the Service Mirror PodMonitor endpoint. When set to false,
+    # Prometheus uses scrape time instead of exporter-provided timestamps.
+    honorTimestamps: false
   proxy:
     # -- Enables the creation of PodMonitor for the data-plane
     enabled: true
+    # -- Sets honorTimestamps for the proxy PodMonitor endpoint. When set to false,
+    # Prometheus uses scrape time instead of exporter-provided timestamps,
+    # preventing duplicate timestamp drops in clusters with frequent pod restarts.
+    honorTimestamps: false
 
 
 # Egress related configuration