mirror of
https://github.com/ysoftdevs/gardener-extension-shoot-fleet-agent.git
synced 2026-05-19 13:27:18 +02:00
Initial v1.0.0 commit
This commit is contained in:
Jakub Vavřík
+448
@@ -0,0 +1,448 @@
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/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package chartutil
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"k8s.io/helm/pkg/proto/hapi/chart"
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)
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const (
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// ChartfileName is the default Chart file name.
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ChartfileName = "Chart.yaml"
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// ValuesfileName is the default values file name.
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ValuesfileName = "values.yaml"
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// TemplatesDir is the relative directory name for templates.
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TemplatesDir = "templates"
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// ChartsDir is the relative directory name for charts dependencies.
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ChartsDir = "charts"
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// IgnorefileName is the name of the Helm ignore file.
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IgnorefileName = ".helmignore"
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// IngressFileName is the name of the example ingress file.
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IngressFileName = "ingress.yaml"
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// DeploymentName is the name of the example deployment file.
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DeploymentName = "deployment.yaml"
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// ServiceName is the name of the example service file.
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ServiceName = "service.yaml"
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// NotesName is the name of the example NOTES.txt file.
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NotesName = "NOTES.txt"
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// HelpersName is the name of the example helpers file.
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HelpersName = "_helpers.tpl"
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// TemplatesTestsDir is the relative directory name for templates tests.
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TemplatesTestsDir = "templates/tests"
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// TestConnectionName is the name of the example connection test file.
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TestConnectionName = "test-connection.yaml"
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)
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const defaultValues = `# Default values for %s.
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# This is a YAML-formatted file.
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# Declare variables to be passed into your templates.
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replicaCount: 1
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image:
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repository: nginx
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tag: stable
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pullPolicy: IfNotPresent
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nameOverride: ""
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fullnameOverride: ""
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service:
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type: ClusterIP
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port: 80
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ingress:
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enabled: false
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annotations: {}
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# kubernetes.io/ingress.class: nginx
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# kubernetes.io/tls-acme: "true"
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hosts:
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- host: chart-example.local
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paths: []
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tls: []
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# - secretName: chart-example-tls
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# hosts:
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# - chart-example.local
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resources: {}
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# We usually recommend not to specify default resources and to leave this as a conscious
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# choice for the user. This also increases chances charts run on environments with little
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# resources, such as Minikube. If you do want to specify resources, uncomment the following
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# lines, adjust them as necessary, and remove the curly braces after 'resources:'.
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# limits:
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# cpu: 100m
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# memory: 128Mi
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# requests:
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# cpu: 100m
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# memory: 128Mi
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nodeSelector: {}
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tolerations: []
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affinity: {}
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`
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const defaultIgnore = `# Patterns to ignore when building packages.
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# This supports shell glob matching, relative path matching, and
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# negation (prefixed with !). Only one pattern per line.
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.DS_Store
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# Common VCS dirs
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.git/
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.gitignore
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.bzr/
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.bzrignore
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.hg/
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.hgignore
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.svn/
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# Common backup files
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*.swp
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*.bak
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*.tmp
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*~
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# Various IDEs
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.project
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.idea/
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*.tmproj
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.vscode/
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`
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const defaultIngress = `{{- if .Values.ingress.enabled -}}
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{{- $fullName := include "<CHARTNAME>.fullname" . -}}
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apiVersion: extensions/v1beta1
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kind: Ingress
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metadata:
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name: {{ $fullName }}
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labels:
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app.kubernetes.io/name: {{ include "<CHARTNAME>.name" . }}
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helm.sh/chart: {{ include "<CHARTNAME>.chart" . }}
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app.kubernetes.io/instance: {{ .Release.Name }}
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app.kubernetes.io/managed-by: {{ .Release.Service }}
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{{- with .Values.ingress.annotations }}
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annotations:
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{{- toYaml . | nindent 4 }}
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{{- end }}
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spec:
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{{- if .Values.ingress.tls }}
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tls:
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{{- range .Values.ingress.tls }}
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- hosts:
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{{- range .hosts }}
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- {{ . | quote }}
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{{- end }}
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secretName: {{ .secretName }}
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{{- end }}
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{{- end }}
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rules:
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{{- range .Values.ingress.hosts }}
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- host: {{ .host | quote }}
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http:
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paths:
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{{- range .paths }}
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- path: {{ . }}
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backend:
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serviceName: {{ $fullName }}
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servicePort: http
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{{- end }}
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{{- end }}
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{{- end }}
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`
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const defaultDeployment = `apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: {{ include "<CHARTNAME>.fullname" . }}
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labels:
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app.kubernetes.io/name: {{ include "<CHARTNAME>.name" . }}
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helm.sh/chart: {{ include "<CHARTNAME>.chart" . }}
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app.kubernetes.io/instance: {{ .Release.Name }}
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app.kubernetes.io/managed-by: {{ .Release.Service }}
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spec:
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replicas: {{ .Values.replicaCount }}
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selector:
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matchLabels:
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app.kubernetes.io/name: {{ include "<CHARTNAME>.name" . }}
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app.kubernetes.io/instance: {{ .Release.Name }}
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template:
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metadata:
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labels:
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app.kubernetes.io/name: {{ include "<CHARTNAME>.name" . }}
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app.kubernetes.io/instance: {{ .Release.Name }}
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spec:
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containers:
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- name: {{ .Chart.Name }}
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image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
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imagePullPolicy: {{ .Values.image.pullPolicy }}
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ports:
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- name: http
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containerPort: 80
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protocol: TCP
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livenessProbe:
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httpGet:
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path: /
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port: http
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readinessProbe:
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httpGet:
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path: /
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port: http
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resources:
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{{- toYaml .Values.resources | nindent 12 }}
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{{- with .Values.nodeSelector }}
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nodeSelector:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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{{- with .Values.affinity }}
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affinity:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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{{- with .Values.tolerations }}
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tolerations:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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`
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const defaultService = `apiVersion: v1
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kind: Service
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metadata:
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name: {{ include "<CHARTNAME>.fullname" . }}
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labels:
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app.kubernetes.io/name: {{ include "<CHARTNAME>.name" . }}
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helm.sh/chart: {{ include "<CHARTNAME>.chart" . }}
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app.kubernetes.io/instance: {{ .Release.Name }}
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app.kubernetes.io/managed-by: {{ .Release.Service }}
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spec:
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type: {{ .Values.service.type }}
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ports:
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- port: {{ .Values.service.port }}
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targetPort: http
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protocol: TCP
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name: http
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selector:
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app.kubernetes.io/name: {{ include "<CHARTNAME>.name" . }}
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app.kubernetes.io/instance: {{ .Release.Name }}
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`
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const defaultNotes = `1. Get the application URL by running these commands:
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{{- if .Values.ingress.enabled }}
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{{- range $host := .Values.ingress.hosts }}
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{{- range .paths }}
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http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ . }}
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{{- end }}
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{{- end }}
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{{- else if contains "NodePort" .Values.service.type }}
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export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "<CHARTNAME>.fullname" . }})
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export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
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echo http://$NODE_IP:$NODE_PORT
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{{- else if contains "LoadBalancer" .Values.service.type }}
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NOTE: It may take a few minutes for the LoadBalancer IP to be available.
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You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "<CHARTNAME>.fullname" . }}'
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export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "<CHARTNAME>.fullname" . }} -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
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echo http://$SERVICE_IP:{{ .Values.service.port }}
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{{- else if contains "ClusterIP" .Values.service.type }}
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export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "<CHARTNAME>.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
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echo "Visit http://127.0.0.1:8080 to use your application"
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kubectl port-forward $POD_NAME 8080:80
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{{- end }}
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`
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const defaultHelpers = `{{/* vim: set filetype=mustache: */}}
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{{/*
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Expand the name of the chart.
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*/}}
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{{- define "<CHARTNAME>.name" -}}
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{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
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{{- end -}}
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{{/*
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Create a default fully qualified app name.
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We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
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If release name contains chart name it will be used as a full name.
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*/}}
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{{- define "<CHARTNAME>.fullname" -}}
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{{- if .Values.fullnameOverride -}}
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{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
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{{- else -}}
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{{- $name := default .Chart.Name .Values.nameOverride -}}
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{{- if contains $name .Release.Name -}}
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{{- .Release.Name | trunc 63 | trimSuffix "-" -}}
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{{- else -}}
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{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
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{{- end -}}
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{{- end -}}
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{{- end -}}
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{{/*
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Create chart name and version as used by the chart label.
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*/}}
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{{- define "<CHARTNAME>.chart" -}}
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{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
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{{- end -}}
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`
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const defaultTestConnection = `apiVersion: v1
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kind: Pod
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metadata:
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name: "{{ include "<CHARTNAME>.fullname" . }}-test-connection"
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labels:
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app.kubernetes.io/name: {{ include "<CHARTNAME>.name" . }}
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helm.sh/chart: {{ include "<CHARTNAME>.chart" . }}
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app.kubernetes.io/instance: {{ .Release.Name }}
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app.kubernetes.io/managed-by: {{ .Release.Service }}
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annotations:
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"helm.sh/hook": test-success
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spec:
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containers:
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- name: wget
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image: busybox
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command: ['wget']
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args: ['{{ include "<CHARTNAME>.fullname" . }}:{{ .Values.service.port }}']
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restartPolicy: Never
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`
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// CreateFrom creates a new chart, but scaffolds it from the src chart.
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func CreateFrom(chartfile *chart.Metadata, dest string, src string) error {
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schart, err := Load(src)
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if err != nil {
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return fmt.Errorf("could not load %s: %s", src, err)
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}
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schart.Metadata = chartfile
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var updatedTemplates []*chart.Template
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for _, template := range schart.Templates {
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newData := Transform(string(template.Data), "<CHARTNAME>", schart.Metadata.Name)
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updatedTemplates = append(updatedTemplates, &chart.Template{Name: template.Name, Data: newData})
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}
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schart.Templates = updatedTemplates
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if schart.Values != nil {
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schart.Values = &chart.Config{Raw: string(Transform(schart.Values.Raw, "<CHARTNAME>", schart.Metadata.Name))}
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}
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return SaveDir(schart, dest)
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}
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// Create creates a new chart in a directory.
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//
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// Inside of dir, this will create a directory based on the name of
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// chartfile.Name. It will then write the Chart.yaml into this directory and
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// create the (empty) appropriate directories.
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//
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// The returned string will point to the newly created directory. It will be
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// an absolute path, even if the provided base directory was relative.
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//
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// If dir does not exist, this will return an error.
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// If Chart.yaml or any directories cannot be created, this will return an
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// error. In such a case, this will attempt to clean up by removing the
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// new chart directory.
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func Create(chartfile *chart.Metadata, dir string) (string, error) {
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path, err := filepath.Abs(dir)
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if err != nil {
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return path, err
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}
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if fi, err := os.Stat(path); err != nil {
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return path, err
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} else if !fi.IsDir() {
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return path, fmt.Errorf("no such directory %s", path)
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}
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n := chartfile.Name
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cdir := filepath.Join(path, n)
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if fi, err := os.Stat(cdir); err == nil && !fi.IsDir() {
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return cdir, fmt.Errorf("file %s already exists and is not a directory", cdir)
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}
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if err := os.MkdirAll(cdir, 0755); err != nil {
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return cdir, err
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}
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cf := filepath.Join(cdir, ChartfileName)
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if _, err := os.Stat(cf); err != nil {
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if err := SaveChartfile(cf, chartfile); err != nil {
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return cdir, err
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}
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}
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for _, d := range []string{TemplatesDir, TemplatesTestsDir, ChartsDir} {
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if err := os.MkdirAll(filepath.Join(cdir, d), 0755); err != nil {
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return cdir, err
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}
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}
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files := []struct {
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path string
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content []byte
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}{
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{
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// values.yaml
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path: filepath.Join(cdir, ValuesfileName),
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content: []byte(fmt.Sprintf(defaultValues, chartfile.Name)),
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},
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{
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// .helmignore
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path: filepath.Join(cdir, IgnorefileName),
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content: []byte(defaultIgnore),
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},
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{
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// ingress.yaml
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path: filepath.Join(cdir, TemplatesDir, IngressFileName),
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content: Transform(defaultIngress, "<CHARTNAME>", chartfile.Name),
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},
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{
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// deployment.yaml
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path: filepath.Join(cdir, TemplatesDir, DeploymentName),
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content: Transform(defaultDeployment, "<CHARTNAME>", chartfile.Name),
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},
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{
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// service.yaml
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path: filepath.Join(cdir, TemplatesDir, ServiceName),
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content: Transform(defaultService, "<CHARTNAME>", chartfile.Name),
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},
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{
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// NOTES.txt
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path: filepath.Join(cdir, TemplatesDir, NotesName),
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content: Transform(defaultNotes, "<CHARTNAME>", chartfile.Name),
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},
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{
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// _helpers.tpl
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path: filepath.Join(cdir, TemplatesDir, HelpersName),
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content: Transform(defaultHelpers, "<CHARTNAME>", chartfile.Name),
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},
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{
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// test-connection.yaml
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path: filepath.Join(cdir, TemplatesTestsDir, TestConnectionName),
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content: Transform(defaultTestConnection, "<CHARTNAME>", chartfile.Name),
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},
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}
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for _, file := range files {
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if _, err := os.Stat(file.path); err == nil {
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||||
// File exists and is okay. Skip it.
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continue
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||||
}
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||||
if err := ioutil.WriteFile(file.path, file.content, 0644); err != nil {
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||||
return cdir, err
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||||
}
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||||
}
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||||
return cdir, nil
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||||
}
|
||||
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