[influxdb2] add init scripts support (#456)

charts/influxdb2/Chart.yaml

@@ -4,7 +4,7 @@ name: influxdb2
 description: A Helm chart for InfluxDB v2
 home: https://www.influxdata.com/products/influxdb/
 type: application
-version: 2.0.12
+version: 2.1.0
 maintainers:
   - name: rawkode
     email: rawkode@influxdata.com

charts/influxdb2/ci/default-values.yaml

+# Default values only, no overrides

charts/influxdb2/ci/init-scripts-values.yaml

+initScripts:
+  enabled: true
+
+persistence:
+  enabled: false

charts/influxdb2/templates/_helpers.tpl

@@ -36,12 +36,12 @@ Common labels
 */}}
 {{- define "influxdb.labels" -}}
 app.kubernetes.io/name: {{ include "influxdb.name" . }}
-helm.sh/chart: {{ include "influxdb.chart" . }}
 app.kubernetes.io/instance: {{ .Release.Name }}
 {{- if .Chart.AppVersion }}
 app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
 {{- end }}
 app.kubernetes.io/managed-by: {{ .Release.Service }}
+helm.sh/chart: {{ include "influxdb.chart" . }}
 {{- end -}}
 
 {{/*

charts/influxdb2/templates/init-config.yaml

+{{- if .Values.initScripts.enabled -}}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "influxdb.fullname" . }}-init
+  labels:
+    {{- include "influxdb.labels" . | nindent 4 }}
+data:
+{{ toYaml .Values.initScripts.scripts | indent 2 }}
+{{- end -}}

charts/influxdb2/templates/service.yaml

@@ -30,10 +30,11 @@ spec:
       port: {{ .Values.service.port }}
       protocol: TCP
       targetPort: {{ .Values.service.targetPort }}
-{{ if (and (eq .Values.service.type "NodePort") (not (empty .Values.service.nodePort))) }}
-      nodePort: {{.Values.service.nodePort}}
-{{ end }}
+{{- if (and (eq .Values.service.type "NodePort") (not (empty .Values.service.nodePort))) }}
+      nodePort: {{ .Values.service.nodePort }}
+{{- end }}
   {{- if .Values.extraExposePorts }}
   {{- tpl (toYaml .Values.extraExposePorts) . | indent 4 }}
   {{- end }}
-  selector: {{- include "influxdb.selectorLabels" . | nindent 4 }}
+  selector:
+    {{- include "influxdb.selectorLabels" . | nindent 4 }}

charts/influxdb2/templates/statefulset.yaml

@@ -3,7 +3,7 @@ kind: StatefulSet
 metadata:
   name: {{ template "influxdb.fullname" . }}
   labels:
-    {{ include "influxdb.labels" . | nindent 4 }}
+    {{- include "influxdb.labels" . | nindent 4 }}
 spec:
   replicas: 1
   selector:
@@ -14,8 +14,13 @@ spec:
     metadata:
       labels:
       {{- include "influxdb.selectorLabels" . | nindent 8 }}
+      {{- if .Values.podLabels }}
+{{ toYaml .Values.podLabels | indent 8 }}
+      {{- end }}
+      {{- if .Values.podAnnotations }}
       annotations:
-      {{- toYaml .Values.podAnnotations | nindent 8 }}
+{{ toYaml .Values.podAnnotations | indent 8 }}
+      {{- end }}
     spec:
       volumes:
         - name: data
@@ -30,6 +35,15 @@ spec:
         {{- else }}
           emptyDir: {}
         {{- end }}
+        {{- if .Values.initScripts.enabled }}
+        - name: init
+          configMap:
+            name: {{ include "influxdb.fullname" . }}-init
+            defaultMode: 0744
+        {{- end }}
+        {{- if .Values.volumes }}
+          {{- toYaml .Values.volumes | nindent 8 }}
+        {{- end }}
       serviceAccountName: {{ include "influxdb.serviceAccountName" . }}
       containers:
         - name: {{ .Chart.Name }}
@@ -76,22 +90,19 @@ spec:
                   name: {{ template "influxdb.fullname" . }}-auth
                   {{- end }}
                   key: admin-token
-
             # Path to the BoltDB database.
             - name: INFLUXD_BOLT_PATH
               value: {{ .Values.persistence.mountPath }}/influxd.bolt
             # Path to persistent storage engine files where InfluxDB stores all Time-Structure Merge Tree (TSM) data on disk.
             - name: INFLUXD_ENGINE_PATH
               value: {{ .Values.persistence.mountPath }}
-
-            # Extra environment variables from .Values.env
             {{- with .Values.env }}
+            # Extra environment variables from .Values.env
             {{- toYaml . | nindent 12 }}
             {{- end }}
-
           {{- if .Values.securityContext }}
           securityContext:
-            {{ toYaml .Values.securityContext | nindent 12 }}
+            {{- toYaml .Values.securityContext | nindent 12 }}
           {{- end }}
           livenessProbe:
             httpGet:
@@ -127,6 +138,13 @@ spec:
           - name: data
             mountPath: {{ .Values.persistence.mountPath }}
             subPath: {{ .Values.persistence.subPath }}
+          {{- if .Values.initScripts.enabled }}
+          - name: init
+            mountPath: /docker-entrypoint-initdb.d
+          {{- end }}
+          {{- if .Values.mountPoints }}
+            {{- toYaml .Values.mountPoints | nindent 10 }}
+          {{- end }}
           resources:
             {{ .Values.resources | toYaml | nindent 12 | trim }}
 

charts/influxdb2/values.yaml

@@ -3,8 +3,14 @@ image:
   tag: 2.2.0-alpine
   pullPolicy: IfNotPresent
 
+## Annotations to be added to InfluxDB pods
+##
 podAnnotations: {}
 
+## Labels to be added to InfluxDB pods
+##
+podLabels: {}
+
 nameOverride: ""
 fullnameOverride: ""
 
@@ -120,6 +126,30 @@ persistence:
   mountPath: /var/lib/influxdb2
   subPath: ""
 
+## Add custom volume and volumeMounts
+##
+# volumes:
+#   - name: influxdb2-templates
+#     hostPath:
+#       path: /data/influxdb2-templates
+#       type: Directory
+# mountPoints:
+#   - name: influxdb2-templates
+#     mountPath: /influxdb2-templates
+#     readOnly: true
+
+## Allow executing custom init scripts
+## If the container finds any files with the .sh extension inside of the
+## /docker-entrypoint-initdb.d folder, it will execute them.
+## When multiple scripts are present, they will be executed in lexical sort order by name.
+## For more details see Custom Initialization Scripts in https://hub.docker.com/_/influxdb
+initScripts:
+  enabled: false
+  scripts:
+    init.sh: |+
+      #!/bin/bash
+      influx apply --force yes -u https://raw.githubusercontent.com/influxdata/community-templates/master/influxdb2_operational_monitoring/influxdb2_operational_monitoring.yml
+
 ## Specify a service type
 ## ref: http://kubernetes.io/docs/user-guide/services/
 ##