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k8s service 负载均衡策略probability，深入解析Kubernetes Service负载均衡策略，probability详解与应用

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本文目录导读：

  1. probability负载均衡策略原理

在Kubernetes中，Service是用于暴露Pod的API对象，而负载均衡则是Service的核心功能之一，Kubernetes提供了多种负载均衡策略，其中probability策略因其独特的优势而备受关注，本文将深入解析probability负载均衡策略，探讨其原理、应用场景以及实现方法。

probability负载均衡策略原理

probability负载均衡策略是一种基于概率的负载均衡方式，它允许用户为Service中每个Pod分配不同的权重，从而实现负载均衡，在probability策略中，请求会被随机分配到具有更高权重的Pod上。

probability策略的原理如下：

1、每个Pod都会被分配一个权重值，权重值可以是0到1之间的任何数值。

k8s service 负载均衡策略probability，深入解析Kubernetes Service负载均衡策略，probability详解与应用

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2、当请求到达Service时，根据Pod的权重值计算一个概率值。

3、系统根据计算出的概率值，随机选择一个Pod来处理请求。

三、probability负载均衡策略应用场景

probability负载均衡策略适用于以下场景：

k8s service 负载均衡策略probability，深入解析Kubernetes Service负载均衡策略，probability详解与应用

图片来源于网络，如有侵权联系删除

1、Pod性能差异较大：当Service中的Pod性能存在明显差异时，可以使用probability策略为性能较好的Pod分配更高的权重，从而提高整体性能。

2、特定Pod功能需求：在需要优先保证某些Pod功能的情况下，可以使用probability策略为这些Pod分配更高的权重。

3、实验性部署：在测试或实验性部署过程中，可以使用probability策略对不同的Pod进行测试，观察其性能表现。

四、probability负载均衡策略实现方法

k8s service 负载均衡策略probability，深入解析Kubernetes Service负载均衡策略，probability详解与应用

图片来源于网络，如有侵权联系删除

1、创建Service对象

需要创建一个Service对象，并指定probability负载均衡策略，以下是一个示例YAML配置文件：

apiVersion: v1
kind: Service
metadata:
  name: example-service
spec:
  selector:
    app: example-app
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  type: LoadBalancer
  sessionAffinity: None
  loadBalancerIP: 10.0.0.10
  externalTrafficPolicy: Local
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: LoadBalancer
  externalTrafficPolicy: Local
  sessionAffinity: None
  loadBalancerSourceRanges:
    - 192.168.1.0/24
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  selector:
    app: example-app
  loadBalancerIP: 10.0.0.10
  type: Load

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