thanos fixes: set replica label and bump memory limits

k8s/monitoring/thanos.yaml

@@ -27,9 +27,11 @@ spec:
           - dnssrv+_grpc._tcp.prometheus-k8s-headless.monitoring.svc
           - --endpoint
           - dnssrv+_grpc._tcp.thanos-store.monitoring.svc
+          - --query.replica-label
+          - prometheus_replica
         resources:
           limits:
-            memory: "128Mi"
+            memory: 512Mi
             cpu: "500m"
         ports:
         - containerPort: 9090
@@ -142,7 +144,7 @@ spec:
           periodSeconds: 5
         resources:
           limits:
-            memory: "128Mi"
+            memory: 512Mi
             cpu: "500m"
         securityContext:
           allowPrivilegeEscalation: false
@@ -275,7 +277,7 @@ spec:
         resources:
           limits:
             cpu: 500m
-            memory: 500Mi
+            memory: 512Mi
           requests:
             cpu: 200m
             memory: 100Mi