chore: add helm charts (#606)

* add helm charts

* update README

deploy/helm/charts/linux-command/.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/

deploy/helm/charts/linux-command/Chart.yaml

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+apiVersion: v2
+name: linux-command
+description: A Helm chart for Kubernetes
+# 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.
+# It is recommended to use it with quotes.
+appVersion: "0.1.0"

deploy/helm/charts/linux-command/README.md

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+# linux-command
+
+linux-command 的 Helm 图表。该图表使用 Helm 软件包管理器在 Kubernetes 集群上引导部署 linux-command。
+
+## 安装 Chart
+
+```
+$ helm install linux-command ./linux-command --namespace linux-command --create-namespace
+```
+
+## 卸载 Chart
+
+```
+$ helm -n linux-command uninstall linux-command
+```
+
+这会删除与图表相关的所有 Kubernetes 组件，并删除发布。
+
+## 配置参数
+
+下表列出了 linux-command 图表的可配置参数及其默认值。
+
+| Key                                                          | Type   | Default                   | Description |
+| ------------------------------------------------------------ | ------ | ------------------------- | ----------- |
+| linuxCommand.linuxCommandContainer.image.repository          | string | `"wcjiang/linux-command"` |             |
+| linuxCommand.linuxCommandContainer.image.tag                 | string | `"latest"`                |             |
+| linuxCommand.linuxCommandContainer.imagePullPolicy           | string | `"IfNotPresent"`          |             |
+| linuxCommand.linuxCommandContainer.resources.limits.cpu      | string | `"100m"`                  |             |
+| linuxCommand.linuxCommandContainer.resources.limits.memory   | string | `"50Mi"`                  |             |
+| linuxCommand.linuxCommandContainer.resources.requests.cpu    | string | `"100m"`                  |             |
+| linuxCommand.linuxCommandContainer.resources.requests.memory | string | `"50Mi"`                  |             |
+| linuxCommand.replicas                                        | int    | `1`                       |             |
+| service.ports[0].port                                        | int    | `9665`                    |             |
+| service.ports[0].protocol                                    | string | `"TCP"`                   |             |
+| service.ports[0].targetPort                                  | int    | `3000`                    |             |
+| service.type                                                 | string | `"NodePort"`              |             |
+
+使用`-set key=value[,key=value]`参数为`helm install`指定每个参数。
+
+或者，也可以在安装图表时提供指定参数值的 YAML 文件。例如
+
+```
+helm install <release-name> -f values.yaml ./linux-command
+```

deploy/helm/charts/linux-command/templates/_helpers.tpl

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+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "linux-command.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 "linux-command.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 "linux-command.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "linux-command.labels" -}}
+helm.sh/chart: {{ include "linux-command.chart" . }}
+{{ include "linux-command.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "linux-command.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "linux-command.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "linux-command.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "linux-command.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

deploy/helm/charts/linux-command/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "linux-command.fullname" . }}-linux-command
+  labels:
+    app: linux-command
+  {{- include "linux-command.labels" . | nindent 4 }}
+spec:
+  replicas: {{ .Values.linuxCommand.replicas }}
+  selector:
+    matchLabels:
+      app: linux-command
+    {{- include "linux-command.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      labels:
+        app: linux-command
+      {{- include "linux-command.selectorLabels" . | nindent 8 }}
+    spec:
+      containers:
+      - env:
+        - name: KUBERNETES_CLUSTER_DOMAIN
+          value: {{ quote .Values.kubernetesClusterDomain }}
+        image: {{ .Values.linuxCommand.linuxCommandContainer.image.repository }}:{{ .Values.linuxCommand.linuxCommandContainer.image.tag
+          | default .Chart.AppVersion }}
+        imagePullPolicy: {{ .Values.linuxCommand.linuxCommandContainer.imagePullPolicy
+          }}
+        name: linux-command-container
+        ports:
+        - containerPort: 3000
+        resources: {{- toYaml .Values.linuxCommand.linuxCommandContainer.resources | nindent
+          10 }}

deploy/helm/charts/linux-command/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "linux-command.fullname" . }}-service
+  labels:
+  {{- include "linux-command.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.service.type }}
+  selector:
+    app: linux-command
+  {{- include "linux-command.selectorLabels" . | nindent 4 }}
+  ports:
+    {{- .Values.service.ports | toYaml | nindent 2 }}

deploy/helm/charts/linux-command/values.yaml

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+linuxCommand:
+  linuxCommandContainer:
+    image:
+      repository: wcjiang/linux-command
+      tag: latest
+    imagePullPolicy: IfNotPresent
+    resources:
+      limits:
+        cpu: 100m
+        memory: 50Mi
+      requests:
+        cpu: 100m
+        memory: 50Mi
+  replicas: 1
+service:
+  ports:
+  - port: 9665
+    protocol: TCP
+    targetPort: 3000
+  type: NodePort