升级头盔模板后无效的规格选择器

Question

我已经升级了头盔模板（手工）

先前的片段depoloyment.yaml：

apiVersion: apps/v1beta2 kind: Deployment metadata:   name: {{ template "measurement-collector.fullname" . }}   labels:
    app: {{ template "measurement-collector.name" . }}
    chart: {{ template "measurement-collector.chart" . }}
    release: {{ .Release.Name }}
    heritage: {{ .Release.Service }} spec:   replicas: {{ .Values.replicaCount }}   selector:
    matchLabels:
      app: {{ template "measurement-collector.name" . }}
      release: {{ .Release.Name }}

新的一个：

apiVersion: apps/v1beta2
kind: Deployment
metadata:
  name: {{ include "measurement-collector.fullname" . }}
  labels:
    app.kubernetes.io/name: {{ include "measurement-collector.name" . }}
    helm.sh/chart: {{ include "measurement-collector.chart" . }}
    app.kubernetes.io/instance: {{ .Release.Name }}
    app.kubernetes.io/managed-by: {{ .Release.Service }}
spec:
  replicas: {{ .Values.replicaCount }}
  selector:
    matchLabels:
      app.kubernetes.io/name: {{ include "measurement-collector.name" . }}
      app.kubernetes.io/instance: {{ .Release.Name }}

新service.yaml：

  name: {{ include "measurement-collector.fullname" . }}
  labels:
    app.kubernetes.io/name: {{ include "measurement-collector.name" . }}
    helm.sh/chart: {{ include "measurement-collector.chart" . }}
    app.kubernetes.io/instance: {{ .Release.Name }}
    app.kubernetes.io/managed-by: {{ .Release.Service }}
spec:
  type: {{ .Values.service.type }}
  ports:
      protocol: TCP
      name: http
  selector:
    app.kubernetes.io/name: {{ include "measurement-collector.name" . }}
    app.kubernetes.io/instance: {{ .Release.Name }}

然后运行后： helm upgrade -i measurement-collector chart/measurement-collector --namespace prod --wait

我得到：

Error: UPGRADE FAILED: Deployment.apps "measurement-collector" is invalid: spec.selector: Invalid value: 
v1.LabelSelector{MatchLabels:map[string]string{"app.kubernetes.io/name":"measurement-collector", "app.kubernetes.io/instance":"measurement-collector"},         
MatchExpressions:[]v1.LabelSelectorRequirement(nil)}: field is immutable

Answer 1

虽然@TigerBear 的答案是正确的，但我想我需要更详细地解释一下。这个问题是由一个简单的原因引起的——选择器的不变性。您无法更新以下选择器（我不确定这是完整列表，请随时纠正我）：

1. 副本集
2. 部署
3. 守护进程集

换句话说，例如，如果您有一个'my-app: ABC'在选择器内带有标签的部署，那么您将选择器内的标签更新到此：'my-app: XYZ'，然后简单地应用此更改，例如如下所示：

kubectl apply -f deployment-file-name.yml

它不会工作 - 你必须重新创建部署。

相关的github k8s问题，在部署文档中也有一些关于它的注释

Answer 2

If you change the selector label, then you will need to purge the release first before deploying.