使用单个 Helm Chart 部署多个服务

Question

我是 helm 和 kubernetes 的新手。

我当前的要求是使用通用舵图设置多个服务。

这是场景。

1. 我有一个适用于所有服务的通用 docker 映像

2. 对于每个服务，都需要运行不同的命令。总共有40多项服务。

   例子

pipenv run python serviceA.py 
pipenv run python serviceB.py 
pipenv run python serviceC.py  
and so on...

我的舵图当前状态是

demo-helm
|- Chart.yaml
|- templates
   |- deployment.yaml
   |- _helpers.tpl
|- values
   |- values-serviceA.yaml
   |- values-serviceB.yaml
   |- values-serviceC.yaml
    and so on ...

现在，因为我想使用相同的 Helm Chart 并部署多个服务。我该怎么做呢？

我使用了以下命令helm install demo-helm . -f values/values-serviceA.yaml -f values-serviceB.yaml，但它只对最后提供的值文件进行部署。

这是我的deployment.yaml文件

apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ include "helm.fullname" . }}
  labels:
    {{- include "helm.labels" . | nindent 4 }}
spec:
  replicas: {{ .Values.replicaCount }}
  selector:
    matchLabels:
      {{- include "helm.selectorLabels" . | nindent 6 }}
  template:
    metadata:
    {{- with .Values.podAnnotations }}
      annotations:
        {{- toYaml . | nindent 8 }}
    {{- end }}
      labels:
        {{- include "helm.selectorLabels" . | nindent 8 }}
    spec:
      {{- with .Values.imagePullSecrets }}
      imagePullSecrets:
        {{- toYaml . | nindent 8 }}
      {{- end }}
      containers:
        - name: {{ .Chart.Name }}
          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
          imagePullPolicy: {{ .Values.image.pullPolicy }}
          command: {{- toYaml .Values.command |nindent 12}} 
          resources:
            {{- toYaml .Values.resources | nindent 12 }}
          volumeMounts:
            - name: secrets
              mountPath: "/usr/src/app/config.ini"
              subPath: config.ini
      {{- with .Values.nodeSelector }}
      nodeSelector:
        {{- toYaml . | nindent 8 }}
      {{- end }}
      {{- with .Values.affinity }}
      affinity:
        {{- toYaml . | nindent 8 }}
      {{- end }}
      {{- with .Values.tolerations }}
      tolerations:
        {{- toYaml . | nindent 8 }}
      {{- end }}
      volumes:
        - name: secrets
          secret:
            secretName: sample-application
            defaultMode: 0400

更新。

由于我的要求已更新为在单个文件中添加服务的所有值，我可以通过以下方式来完成此操作。

deployment.yaml

{{- range $service, $val := .Values.services }}
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ $service }}
  labels:
    app: {{ .nameOverride }}
spec:
  replicas: {{ .replicaCount }}
  selector:
    matchLabels:
      app: {{ .nameOverride }}
  template:
    metadata:
      labels:
        app: {{ .nameOverride }}
    spec:
      imagePullSecrets:
        - name: aws-ecr
      containers:
        - name: {{ $service }}
          image: "image-latest-v3"
          imagePullPolicy: IfNotPresent
          command: {{- toYaml .command |nindent 12}}
          resources:
            {{- toYaml .resources | nindent 12 }}
          volumeMounts:
            - name: secrets
              mountPath: "/usr/src/app/config.ini"
              subPath: config.ini
      volumes:
        - name: secrets
          secret:
            secretName: {{ .secrets }}
            defaultMode: 0400
{{- end }}

和values.yaml

services:
  #Services for region1
  serviceA-region1:
    nameOverride: "serviceA-region1"
    fullnameOverride: "serviceA-region1"
    command: ["bash", "-c", "python serviceAregion1.py"]
    secrets: vader-search-region2
    resources: {}
    replicaCount: 5

  #Services for region2
  serviceA-region2:
    nameOverride: "serviceA-region2"
    fullnameOverride: "serviceA-region2"
    command: ["bash", "-c", "python serviceAregion2.py"]
    secrets: vader-search-region2
    resources: {}
    replicaCount: 5

现在我想知道以下配置是否适用于我在下面发布的更改values.yaml

services:
  region:
  #Services for region1
    serviceA-region1:
      nameOverride: "serviceA-region1"
      fullnameOverride: "serviceA-region1"
      command: ["bash", "-c", "python serviceAregion1.py"]
      secrets: vader-search-region2
      resources: {}
      replicaCount: 5
   
  region:2
  #Services for region2
    serviceA-region2:
      nameOverride: "serviceA-region2"
      fullnameOverride: "serviceA-region2"
      command: ["bash", "-c", "python serviceAregion2.py"]
      secrets: vader-search-region2
      resources: {}
      replicaCount: 5

和deployment.yaml

{{- range $region, $val := .Values.services.region }}
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ $region }}-{{ .nameOverride }}
  labels:
    app: {{ .nameOverride }}
spec:
  replicas: {{ .replicaCount }}
  selector:
    matchLabels:
      app: {{ .nameOverride }}
  template:
    metadata:
      labels:
        app: {{ .nameOverride }}
    spec:
      imagePullSecrets:
        - name: aws-ecr
      containers:
        - name: {{ $region }}-{{ .nameOverride }}
          image: "image-latest-v3"
          imagePullPolicy: IfNotPresent
          command: {{- toYaml .command |nindent 12}}
          resources:
            {{- toYaml .resources | nindent 12 }}
          volumeMounts:
            - name: secrets
              mountPath: "/usr/src/app/config.ini"
              subPath: config.ini
      volumes:
        - name: secrets
          secret:
            secretName: {{ .secrets }}
            defaultMode: 0400
{{- end }}

Answer 1

helm install demo-helm . -f values/values-serviceA.yaml -f values-serviceB.yaml

当您这样做时，serviceB 值将覆盖 serviceA 值。您需要使用不同的版本名称单独运行命令，如下所示：

helm install demo-helm-A . -f values/values-serviceA.yaml
helm install demo-helm-B . -f values/values-serviceB.yaml