added deployment strategy for pushgateway (#17107)

Signed-off-by: Jeff Thompson <jeff.r.thompson@gmail.com>

stable/prometheus/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: prometheus
-version: 9.4.1
+version: 9.5.0
 appVersion: 2.13.1
 description: Prometheus is a monitoring system and time series database.
 home: https://prometheus.io/

stable/prometheus/README.md

@@ -244,6 +244,7 @@ Parameter | Description | Default
 `pushgateway.service.loadBalancerSourceRanges` | list of IP CIDRs allowed access to load balancer (if supported) | `[]`
 `pushgateway.service.servicePort` | pushgateway service port | `9091`
 `pushgateway.service.type` | type of pushgateway service to create | `ClusterIP`
+`pushgateway.strategy.type` | Deployment strategy | `{ "type": "RollingUpdate" }`
 `rbac.create` | If true, create & use RBAC resources | `true`
 `server.enabled` | If false, Prometheus server will not be created | `true`
 `server.name` | Prometheus server container name | `server`

stable/prometheus/templates/pushgateway-deployment.yaml

@@ -13,6 +13,10 @@ spec:
     matchLabels:
       {{- include "prometheus.pushgateway.matchLabels" . | nindent 6 }}
   replicas: {{ .Values.pushgateway.replicaCount }}
+  {{- if .Values.pushgateway.strategy }}
+  strategy:
+{{ toYaml .Values.pushgateway.strategy | indent 4 }}
+  {{- end }}
   template:
     metadata:
     {{- if .Values.pushgateway.podAnnotations }}

stable/prometheus/values.yaml

@@ -986,6 +986,10 @@ pushgateway:
     servicePort: 9091
     type: ClusterIP
 
+  ## pushgateway Deployment Strategy type
+  # strategy:
+  #   type: Recreate
+
   persistentVolume:
     ## If true, pushgateway will create/use a Persistent Volume Claim
     ## If false, use emptyDir