Add support for passing extra command-line args to the operator via Helm values

This change introduces the ability to specify additional command-line arguments for the Postgres Operator via the "extraArgs" field in values.yaml. Documentation has been updated with details on new arguments "-kubeqps" and "-kubeburst" added before: zalando#2667. The chart version is bumped to 1.14.1 to reflect these changes.

Author: k.s.petrov

charts/postgres-operator/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: postgres-operator
-version: 1.14.0
+version: 1.14.1
 appVersion: 1.14.0
 home: https://github.com/zalando/postgres-operator
 description: Postgres Operator creates and manages PostgreSQL clusters running in Kubernetes

charts/postgres-operator/templates/deployment.yaml

@@ -37,6 +37,10 @@ spec:
       - name: {{ .Chart.Name }}
         image: "{{ .Values.image.registry }}/{{ .Values.image.repository }}:{{ .Values.image.tag }}"
         imagePullPolicy: {{ .Values.image.pullPolicy }}
+        {{- if .Values.extraArgs }}
+        args:
+{{ toYaml .Values.extraArgs | indent 8 }}
+        {{- end }}
         env:
       {{- if .Values.enableJsonLogging }}
         - name: ENABLE_JSON_LOGGING

charts/postgres-operator/values.yaml

@@ -18,6 +18,9 @@ configTarget: "OperatorConfigurationCRD"
 # JSON logging format
 enableJsonLogging: false
 
+# Command-line options for the operator
+extraArgs: []
+
 # general configuration parameters
 configGeneral:
   # the deployment should create/update the CRDs

docs/reference/command_line_and_environment.md

@@ -23,6 +23,12 @@ The following command-line options are supported for the operator:
   off can can be overridden by the aforementioned operator configuration
   option.
 
+* **-kubeqps**
+  set the maximum number of Kubernetes API requests per second. Default is 10.
+
+* **-kubeburst**
+  set the burst limit for Kubernetes API requests, allowing temporary spikes beyond the configured QPS. Default is 20.
+
 In addition to that, standard [glog
 flags](https://godoc.org/github.com/golang/glog) are also supported. For
 instance, one may want to add `-alsologtostderr` and `-v=8` to debug the