Add Helm chart for flyway

flyway/.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/

flyway/Chart.yaml

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+apiVersion: v2
+name: flyway
+description: A Helm chart for applying database migrations with Flyway
+
+# 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: 0.1.0
+
+# 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.
+appVersion: "9"

flyway/templates/_helpers.tpl

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+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "flyway.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+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).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "flyway.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "flyway.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "flyway.labels" -}}
+helm.sh/chart: {{ include "flyway.chart" . }}
+{{ include "flyway.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "flyway.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "flyway.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "flyway.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "flyway.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}
+
+
+{{- define "flyway.jobName" -}}
+{{ printf "%s-%s" (include "flyway.fullname" .) ((dict "repo" .Values.checkout.repository "command" .Values.flyway.command) | toJson | sha1sum | trunc 9) }}
+{{- end }}
+

flyway/templates/job.yaml

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+# vim: set filetype=helm:
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: {{ include "flyway.jobName" . }}
+  labels:
+    {{- include "flyway.labels" . | nindent 4 }}
+spec:  
+  backoffLimit: 1
+  completions: 1
+  parallelism: 1
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "flyway.selectorLabels" . | nindent 8 }}
+    spec:
+      restartPolicy: Never
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "flyway.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      volumes:
+      - name: work
+        emptyDir: {}
+      - name: ssh-key
+        secret:
+          secretName: {{ .Values.checkout.sshKey.secretName }}
+          defaultMode: 0600
+      - name: ssh-known-hosts
+        configMap:
+          name: {{ .Values.checkout.knownHosts.configMapName }}
+          defaultMode: 0660
+      initContainers:
+      - name: checkout
+        image: "{{ .Values.checkout.image.repository }}:{{ .Values.checkout.image.tag }}" 
+        imagePullPolicy: {{ .Values.checkout.image.pullPolicy }}
+        securityContext: 
+          {{- toYaml .Values.checkout.securityContext | nindent 10 }}
+        env:
+        - name: REPO_URL
+          value: {{ .Values.checkout.repository.url }}
+        - name: REPO_BRANCH
+          value: {{ .Values.checkout.repository.branch }}
+        - name: PATH_TO_CHECKOUT
+          value: {{ .Values.checkout.repository.path }}
+        - name: SSH_KEY_FILE
+          value: {{ .Values.checkout.homeDir }}/.ssh/key
+        - name: GIT_SSH_COMMAND
+          value: >-
+            ssh -i $(SSH_KEY_FILE) -o IdentitiesOnly=true
+        command:
+        - sh
+        - -eux
+        args:
+        - -c
+        - |-
+          git clone --sparse --depth 1 --branch ${REPO_BRANCH} ${REPO_URL} .
+          git sparse-checkout init --cone && git sparse-checkout set ${PATH_TO_CHECKOUT}
+        workingDir: {{ .Values.checkout.homeDir }}/code
+        volumeMounts:
+        - name: work
+          mountPath: {{ .Values.checkout.homeDir }}/code
+        - name: ssh-key
+          mountPath: {{ .Values.checkout.homeDir }}/.ssh/key
+          subPath: ssh-privatekey
+        - name: ssh-known-hosts
+          mountPath: {{ .Values.checkout.homeDir }}/.ssh/known_hosts
+          subPath: ssh_known_hosts
+      containers:
+      - name: flyway
+        image: "{{ .Values.flyway.image.repository }}:{{ .Values.flyway.image.tag }}"
+        imagePullPolicy: {{ .Values.flyway.image.pullPolicy }}
+        args:
+        - {{ .Values.flyway.command }}
+        env:
+        - name: PATH_TO_CHECKOUT
+          value: {{ .Values.checkout.repository.path }}
+        - name: FLYWAY_SCHEMAS
+          value: {{ .Values.flyway.schemas }}
+        - name: FLYWAY_DEFAULT_SCHEMA
+          value: {{ .Values.flyway.defaultSchema }}
+        - name: FLYWAY_TABLE
+          value: {{ .Values.flyway.table }}
+        - name: FLYWAY_BASELINE_VERSION
+          value: {{ .Values.flyway.baselineVersion | squote }}
+        - name: FLYWAY_BASELINE_ON_MIGRATE
+          value: {{ .Values.flyway.baselineOnMigrate | squote }}
+        - name: FLYWAY_URL
+          value: {{ .Values.flyway.url | squote }}
+        - name: FLYWAY_USER
+          value: {{ .Values.flyway.user }}
+        - name: FLYWAY_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: {{ .Values.flyway.password.secretName }}
+              key: password
+        volumeMounts:
+        - name: work
+          mountPath: /flyway/sql
+          subPathExpr: $(PATH_TO_CHECKOUT) 
+          readOnly: true
+        resources: {{- toYaml .Values.resources | nindent 10 }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}

flyway/templates/serviceaccount.yaml

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

flyway/values.yaml

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+
+imagePullSecrets: []
+nameOverride: ""
+fullnameOverride: ""
+
+serviceAccount:
+  create: false
+  annotations: {}
+  name: ""
+
+podAnnotations: {}
+
+podSecurityContext:
+  fsGroup: 1000
+
+securityContext: {}
+  # capabilities:
+  #   drop:
+  #   - ALL
+  # readOnlyRootFilesystem: true
+  # runAsNonRoot: true
+  # runAsUser: 1000
+
+resources: {}
+  # We usually recommend not to specify default resources and to leave this as a conscious
+  # choice for the user. This also increases chances charts run on environments with little
+  # resources, such as Minikube. If you do want to specify resources, uncomment the following
+  # lines, adjust them as necessary, and remove the curly braces after 'resources:'.
+  # limits:
+  #   cpu: 100m
+  #   memory: 128Mi
+  # requests:
+  #   cpu: 100m
+  #   memory: 128Mi
+
+nodeSelector: {}
+tolerations: []
+affinity: {}
+
+checkout:
+  image: 
+    repository: bitnami/git
+    pullPolicy: IfNotPresent
+    tag: 2.30.1
+  securityContext:
+    # uid of bitnami user
+    runAsUser: 1000
+    runAsGroup: 1000
+  # home of bitnami user
+  homeDir: /home/bitnami
+  # name of the secret holding the SSH key (as "ssh-privatekey") for the Git repository
+  sshKey: 
+    secretName: ssh-key
+  # name of the configmap holding a known-hosts file (as "ssh_known_hosts") for connecting to the Git host
+  knownHosts: 
+    configMapName: ssh-known-hosts
+  # target repository with SQL migrations
+  repository:
+    url: git@github.com:example/helloworld.git
+    branch: master
+    path: src/main/resources/db/migration
+
+flyway:
+  image:
+    repository: flyway/flyway
+    pullPolicy: IfNotPresent
+    tag: "9.15"
+  # Flyway subcommand to execute (info, migrate, validate)   
+  command: "info"
+  # Flyway configuration
+  schemas: "public"
+  defaultSchema: "public"
+  table: "_schema_version"
+  baselineVersion: "1_0_0"
+  baselineOnMigrate: true
+  # database connection URL
+  url: >-  
+    jdbc:postgresql://postgres.default.svc.cluster.local/helloworld?
+  # database user
+  user: postgres
+  # name of the secret holding the password (as "password") for the database user
+  password:
+    secretName: postgres-password