如何在Kubernetes中实现1个节点= 1个Pod

编程问答 2022-08-11

问题描述

我在一个群集中有5个节点（测试）。 我已将它们标记为以下内容：

节点：

  • namespace = A
  • namespace = A
  • namespace = B
  • namespace = B
  • namespace = C

我应用了污点和容差，nodeAffinity和podAntiAffinity。我们的节点已启用自动缩放。但是，我们的节点没有扩大规模，所有吊舱都在1个节点中进行。 我在此链接Kubernetes: Evenly distribute the replicas across the cluster中已读到，使用podAntiAffinity，节点亲和力，污点和公差不能保证这一要求。我们的要求是，应在节点上均匀部署1个pod，并相应地进行扩展。

我想念什么？

apiVersion: apps/v1
kind: StatefulSet
Metadata:
  name: prometheus
  labels:
    app: prometheus
spec:
  serviceName: "prometheus"
  selector:
    matchLabels:
      name: prometheus
  template:
    Metadata:
      labels:
        name: prometheus
        app: prometheus
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeselectorTerms:
            - matchExpressions:
              - key: namespace
                operator: In
                values:
                - A
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
          - podAffinityTerm:
              labelSelector:
                matchExpressions:
                - key: app
                  operator: In
                  values:
                  - prometheus
              topologyKey: kubernetes.io/hostname
            weight: 100
      containers:
      - name: prometheus
        image: quay.io/prometheus/prometheus:v2.6.0
        resources:
          limits:
            memory: 200Mi
          requests:
            cpu: 100m
            memory: 200Mi
      terminationGracePeriodSeconds: 30
      tolerations:
      - key: namespace
        operator: Equal
        value: A

解决方法

您是否尝试过nodeSelector，它将在您将标签附加到的节点上安排容器？

  nodeSelector:
    namespace: A
horizontalpodautoscalerkuberneteskubernetes-pod