Prometheus Helm Chart ConfigMap override for alertmanager and server #1310 (#1311)

* Prometheus Helm Chart ConfigMap override for alertmanager and server (#1310)

* Bump chart version

stable/prometheus/Chart.yaml

@@ -1,5 +1,5 @@
 name: prometheus
-version: 4.1.1
+version: 4.3.0
 description: Prometheus is a monitoring system and time series database.
 home: https://prometheus.io/
 icon: https://raw.githubusercontent.com/prometheus/prometheus.github.io/master/assets/prometheus_logo-cb55bb5c346.png

stable/prometheus/README.md

@@ -50,6 +50,7 @@ Parameter | Description | Default
 `alertmanager.image.tag` | alertmanager container image tag | `v0.5.1`
 `alertmanager.image.pullPolicy` | alertmanager container image pull policy | `IfNotPresent`
 `alertmanager.extraArgs` | Additional alertmanager container arguments | `{}`
+`alertmanager.configMapOverrideName` | Prometheus alertmanager ConfigMap override where full-name is `{{.Release.Name}}-{{.Values.alertmanager.configMapOverrideName}}` and setting this value will prevent the default alertmanager ConfigMap from being generated | `""`
 `alertmanager.ingress.enabled` | If true, alertmanager Ingress will be created | `false`
 `alertmanager.ingress.annotations` | alertmanager Ingress annotations | `{}`
 `alertmanager.ingress.hosts` | alertmanager Ingress hostnames | `[]`
@@ -141,6 +142,7 @@ Parameter | Description | Default
 `server.alertmanagerURL` | (optional) alertmanager URL; only used if alertmanager.enabled = false | `""`
 `server.extraArgs` | Additional Prometheus server container arguments | `{}`
 `server.extraHostPathMounts` | Additional Prometheus server hostPath mounts | `[]`
+`server.configMapOverrideName` | Prometheus server ConfigMap override where full-name is `{{.Release.Name}}-{{.Values.server.configMapOverrideName}}` and setting this value will prevent the default server ConfigMap from being generated | `""`
 `server.ingress.enabled` | If true, Prometheus server Ingress will be created | `false`
 `server.ingress.annotations` | Prometheus server Ingress annotations | `[]`
 `server.ingress.hosts` | Prometheus server Ingress hostnames | `[]`

stable/prometheus/templates/alertmanager-configmap.yaml

@@ -1,4 +1,4 @@
-{{- if .Values.alertmanager.enabled -}}
+{{- if and .Values.alertmanager.enabled (empty .Values.alertmanager.configMapOverrideName) -}}
 apiVersion: v1
 kind: ConfigMap
 metadata:

stable/prometheus/templates/alertmanager-deployment.yaml

@@ -73,7 +73,7 @@ spec:
       volumes:
         - name: config-volume
           configMap:
-            name: {{ template "prometheus.alertmanager.fullname" . }}
+            name: {{ if .Values.alertmanager.configMapOverrideName }}{{ .Release.Name }}-{{ .Values.alertmanager.configMapOverrideName }}{{- else }}{{ template "prometheus.alertmanager.fullname" . }}{{- end }}
         - name: storage-volume
         {{- if .Values.alertmanager.persistentVolume.enabled }}
           persistentVolumeClaim:

stable/prometheus/templates/server-configmap.yaml

@@ -1,3 +1,4 @@
+{{- if (empty .Values.server.configMapOverrideName) -}}
 apiVersion: v1
 kind: ConfigMap
 metadata:
@@ -10,3 +11,4 @@ metadata:
   name: {{ template "prometheus.server.fullname" . }}
 data:
 {{ toYaml .Values.serverFiles | indent 2 }}
+{{- end }}

stable/prometheus/templates/server-deployment.yaml

@@ -82,7 +82,7 @@ spec:
       volumes:
         - name: config-volume
           configMap:
-            name: {{ template "prometheus.server.fullname" . }}
+            name: {{ if .Values.server.configMapOverrideName }}{{ .Release.Name }}-{{ .Values.server.configMapOverrideName }}{{- else }}{{ template "prometheus.server.fullname" . }}{{- end }}
         - name: storage-volume
         {{- if .Values.server.persistentVolume.enabled }}
           persistentVolumeClaim:

stable/prometheus/values.yaml

@@ -23,6 +23,12 @@ alertmanager:
   ##
   extraEnv: {}
 
+  ## ConfigMap override where fullname is {{.Release.Name}}-{{.Values.alertmanager.configMapOverrideName}}
+  ## Defining configMapOverrideName will cause templates/alertmanager-configmap.yaml
+  ## to NOT generate a ConfigMap resource
+  ##
+  configMapOverrideName: ""
+
   ingress:
     ## If true, alertmanager Ingress will be created
     ##
@@ -307,6 +313,12 @@ server:
     #   hostPath: /etc/kubernetes/certs
     #   readOnly: true
 
+  ## ConfigMap override where fullname is {{.Release.Name}}-{{.Values.server.configMapOverrideName}}
+  ## Defining configMapOverrideName will cause templates/server-configmap.yaml
+  ## to NOT generate a ConfigMap resource
+  ##
+  configMapOverrideName: ""
+
   ingress:
     ## If true, Prometheus server Ingress will be created
     ##