Docker Kubernetes(Mac)-自动缩放器无法找到指标 [英] Docker Kubernetes (Mac) - Autoscaler unable to find metrics

问题描述

我已经在Mac上通过Docker安装了Kubernetes的本地实例.

I have installed a local instance of Kubernetes via Docker on my Mac.

按照演练进行激活在部署上自动缩放我遇到了一个问题.自动缩放器无法读取指标.

Following the walkthrough on how to activate autoscaling on a deployment I have experienced an issue. The autoscaler can't read the metrics.

当我运行kubectl describe hpa时，当前的CPU使用率以未知/50％的形式返回并显示警告:

When I am running kubectl describe hpa the current cpu usage comes back as unknown / 50% with the warnings:

警告失败GetResourceMetric: horizo​​ntal-pod-autoscaler无法获取资源cpu的指标: 无法从API获取指标:服务器找不到 请求的资源(获取pods.metrics.k8s.io)

Warning FailedGetResourceMetric: horizontal-pod-autoscaler unable to get metrics for resource cpu: unable to fetch metrics from API: the server could not find the requested resource (get pods.metrics.k8s.io)

警告失败的计算指标重复 horizo​​ntal-pod-autoscaler无法获得cpu利用率:无法 获取资源cpu的指标:无法从API获取指标: 服务器找不到请求的资源(获取pods.metrics.k8s.io)

Warning FailedComputeMetricsReplicas horizontal-pod-autoscaler failed to get cpu utilization: unable to get metrics for resource cpu: unable to fetch metrics from API: the server could not find the requested resource (get pods.metrics.k8s.io)

我已经通过git clone https://github.com/kubernetes-incubator/metrics-server.git安装了指标服务器，并通过kubectl create -f deploy/1.8+

I have installed the metrics-server via git clone https://github.com/kubernetes-incubator/metrics-server.gitand installed it with kubectl create -f deploy/1.8+

推荐答案

我终于使它工作了. 这是我为使事情正常运行所采取的全部步骤:

I finally got it working.. Here are the full steps I took to get things working:

1. Kubernetes在Docker中运行

1. Have Kubernetes running within Docker

使用kubectl delete -n kube-system deployments.apps metrics-server

使用git clone https://github.com/kubernetes-incubator/metrics-server.git

编辑文件 deploy/1.8 +/metrics-server-deployment.yaml ，通过添加不存在的 command 部分来覆盖默认命令前.新部分将指示metrics-server允许进行不安全的通信会话(不要验证所涉及的证书).仅对Docker执行此操作，而不对metrics-server的生产部署执行此操作:

Edit the file deploy/1.8+/metrics-server-deployment.yaml to override the default command by adding a command section that didn't exist before. The new section will instruct metrics-server to allow for an insecure communications session (don't verify the certs involved). Do this only for Docker, and not for production deployments of metrics-server:

containers:
- name: metrics-server
    image: k8s.gcr.io/metrics-server-amd64:v0.3.1
    command:
      - /metrics-server
      - --kubelet-insecure-tls

使用kubectl create -f deploy/1.8+将metrics-server添加到您的Kubernetes实例(如果.yaml出现错误，请改写为:kubectl apply -f deploy/1.8+)

Add metrics-server to your Kubernetes instance with kubectl create -f deploy/1.8+ (if errors with the .yaml, write this instead: kubectl apply -f deploy/1.8+)

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