Add periodic tasks chart (#600)

* Add periodic tasks chart

* Fix comments

charts/periodic-tasks/.helmignore

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

charts/periodic-tasks/Chart.yaml

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+apiVersion: v2
+name: periodic-tasks
+description: Periodic Tasks Scheduler
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.0.1
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+# It is recommended to use it with quotes.
+appVersion: "0.0.1"

charts/periodic-tasks/templates/_helpers.tpl

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+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+*/}}
+{{- define "periodic-tasks.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s" .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- end}}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "periodic-tasks.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "periodic-tasks.labels" -}}
+helm.sh/chart: {{ include "periodic-tasks.chart" . }}
+{{ include "periodic-tasks.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "periodic-tasks.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "periodic-tasks.fullname" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+repository: {{ .Values.repository | default "none" }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "periodic-tasks.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "periodic-tasks.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}
+

charts/periodic-tasks/templates/cronjob.yaml

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+{{ range $cronjob := .Values.cronJobs }}
+---
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: {{ $cronjob.name }}
+  labels:
+    {{- include "periodic-tasks.labels" $ | nindent 4 }}
+    component: "{{ $cronjob.name }}"
+spec:
+  schedule: {{ $cronjob.schedule | quote }}
+  {{- if $cronjob.timezone }}
+  timeZone: {{ $cronjob.timezone | quote }}
+  {{- end }}
+  {{- if $cronjob.concurrencyPolicy }}
+  concurrencyPolicy: {{ $cronjob.concurrencyPolicy | quote }}
+  {{- end }}
+  {{- if $cronjob.suspend }}
+  suspend: {{ $cronjob.suspend | quote }}
+  {{- end }}
+  startingDeadlineSeconds: 100
+  successfulJobsHistoryLimit: 1
+  failedJobsHistoryLimit: 1
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          {{- if $cronjob.volumes }}
+          volumes:
+            {{- tpl (toYaml $cronjob.volumes) . | nindent 12 }}
+          {{- end }}
+          {{- with $.Values.imagePullSecrets }}
+          imagePullSecrets:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+          {{- with $cronjob.affinity }}
+          affinity:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+          containers:
+          - name: {{ $cronjob.name }}
+            image: {{ $cronjob.image }}
+            imagePullPolicy: {{ $.Values.image.pullPolicy }}
+          {{- if $cronjob.arguments }}
+            args:
+            {{- range $arg := $cronjob.arguments }}
+              - {{ $arg }}
+            {{- end }}
+          {{- end }}
+            {{- with $.Values.env }}
+            env:
+              {{- toYaml . | nindent 14 }}
+            {{- end }}
+            {{- with $.Values.envFrom }}
+            envFrom:
+              {{- toYaml . | nindent 14 }}
+            {{- end }}
+            {{- if $cronjob.volumeMounts }}
+            volumeMounts:
+              {{- tpl (toYaml $cronjob.volumeMounts) . | nindent 12 }}
+            {{- end }}
+            resources:
+              {{- toYaml $cronjob.resources | nindent 14 }}
+          restartPolicy: OnFailure
+---
+{{- end }}

charts/periodic-tasks/templates/extra-configmaps.yaml

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+{{- $Global := . }}
+{{- range $configMapName, $configMapContent := .Values.extraConfigMaps }}
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ tpl $configMapName $Global | quote }}
+  labels:
+    {{- include "periodic-tasks.labels" $Global | nindent 4 }}
+    {{- if $configMapContent.labels }}
+      {{- toYaml $configMapContent.labels | nindent 4 }}
+    {{- end }}
+  annotations:
+    "helm.sh/hook": "pre-install,pre-upgrade"
+    "helm.sh/hook-delete-policy": "before-hook-creation"
+    "helm.sh/hook-weight": "0"
+    {{- if $configMapContent.annotations }}
+      {{- toYaml $configMapContent.annotations | nindent 4 }}
+    {{- end }}
+{{- if $configMapContent.data }}
+data:
+  {{- with $configMapContent.data }}
+    {{- tpl . $Global | nindent 2 }}
+  {{- end }}
+{{- end }}
+{{- end }}

charts/periodic-tasks/templates/serviceaccount.yaml

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+{{- if .Values.serviceAccount.create -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "periodic-tasks.serviceAccountName" . }}
+  labels:
+    {{- include "periodic-tasks.labels" . | nindent 4 }}
+  {{- with .Values.serviceAccount.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+{{- end }}

charts/periodic-tasks/values.yaml

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+# Default values for periodic-tasks.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+image:
+  pullPolicy: IfNotPresent
+
+imagePullSecrets: []
+nameOverride: ""
+fullnameOverride: ""
+
+## CronJobs
+## Example:
+## cronJobs:
+##   - name: cronjob
+##     image: busybox
+##     arguments:
+##       - /bin/sh
+##       - -c
+##       - "sleep 100"
+##     schedule: "*/1 * * * *"
+##     timeZone: "Europe/Moscow"
+##     concurrencyPolicy: Forbid
+##     suspend: false
+##
+cronJobs: {}
+
+serviceAccount:
+  # Specifies whether a service account should be created
+  create: true
+  # Annotations to add to the service account
+  annotations: {}
+  # The name of the service account to use.
+  # If not set and create is true, a name is generated using the fullname template
+  name: ""
+
+# Application Configuration
+env: []
+  # - name: KEY
+  #   value: value
+  # - name: TOKEN
+  #   valueFrom:
+  #     secretKeyRef:
+  #       name: my-secret
+  #       key: my_secret_value
+
+# Additional environment from configmap or secret
+envFrom: []
+  # - configMapRef:
+  #     name: env-configmap
+  # - secretRef:
+  #     name: env-secrets
+
+# Extra ConfigMaps that will be managed by the chart
+# (You can use them with EnvFrom or some of the extraContainerVolumes values).
+# The format for configmap data is "key/value" where
+#    * key (can be templated) is the name of the configmap that will be created
+#    * value: an object with the standard 'data' key.
+#          The value associated with this keys must be a string (can be templated)
+extraConfigMaps: {}
+# eg:
+# extraConfigMaps:
+#   custom-config:
+#     labels:
+#       my.custom.label/v2: my_custom_label_value_2
+#     data: |
+#       config.json: |
+#         {"key": "some data here in any format, e.g. json, yaml, toml, plaintext and so on"}
+#       data.csv: |
+#         column 1 name,column 2 name, column 3 name
+#         first row data 1,first row data 2,first row data 3
+#         second row data 1,second row data 2,second row data 3
+