升级 helm 模板后规格选择器无效

Question

我已经升级了 helm 模板（手动）

前一个 depoloyment.yaml 的片段：

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：

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 }}

然后在运行之后：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

如果更改选择器标签，则需要在部署前先清除发布。

Answer 2

虽然@TigerBear的回答是正确的，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。您不能更新选择器（我不确定这是完整列表，请随时纠正我）：

副本集
部署
DaemonSets

换句话说，例如，如果您在选择器中有一个带有标签 'my-app: ABC' 的部署，之后您将选择器中的标签更新到此：'my-app: XYZ'，然后简单地应用此更改，例如像这样：

kubectl apply -f deployment-file-name.yml

它不会工作 - 您必须重新创建部署。

Related github k8s issue, also there is a little note about it in the Deployment doc

升级 helm 模板后规格选择器无效

Invalid spec selector after upgrading helm template

kubernetes

kubernetes-helm