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amazon-web-services - 如果将 kubeadm init 与 --cloud-provider=aws 标志一起使用，则 kubernetes 控制器管理器错误

问题描述

k8s 控制器管理器无法启动（通过更改 AWS EC2 标签解决）

我有与这篇文章类似的问题：kube-controller-manager don't start when using "cloud-provider=aws" with kubeadm，但这并没有提供任何解决问题的解决方案。下面是来自kubernetes 控制器管理器的日志统计信息。

I0705 17:59:05.941049       1 controllermanager.go:116] Version: v1.10.3
W0705 17:59:05.941983       1 authentication.go:55] Authentication is disabled
I0705 17:59:05.942004       1 insecure_serving.go:44] Serving insecurely on 127.0.0.1:10252
I0705 17:59:05.942450       1 leaderelection.go:175] attempting to acquire leader lease  kube-system/kube-controller-manager...
I0705 17:59:22.823671       1 leaderelection.go:184] successfully acquired lease kube-system/kube-controller-manager
I0705 17:59:22.823945       1 event.go:218] Event(v1.ObjectReference{Kind:"Endpoints", Namespace:"kube-system", Name:"kube-controller-manager", UID:"ec7f1208-807c-11e8-bc66-0e594759e784", APIVersion:"v1", ResourceVersion:"289", FieldPath:""}): type: 'Normal' reason: 'LeaderElection' k8s_1bbcc7bc-807d-11e8-859d-0e594759e784 became leader
I0705 17:59:22.849017       1 aws.go:1026] Building AWS cloudprovider
I0705 17:59:22.849064       1 aws.go:988] Zone not specified in configuration file; querying AWS metadata service
F0705 17:59:22.851606       1 controllermanager.go:159] error building controller context: cloud provider could not be initialized: could not init cloud provider "aws": error finding instance i-07df027cffda674bc: "error listing AWS instances: \"NoCredentialProviders: no valid providers in chain. Deprecated.\\n\\tFor verbose messaging see aws.Config.CredentialsChainVerboseErrors\""

该/etc/kubernetes/aws.conf文件。

apiVersion: kubeadm.k8s.io/v1alpha1
kind: MasterConfiguration
cloudProvider: aws
kubernetesVersion: 1.10.3

该/etc/kubernetes/cloud-config.conf文件。

[Global]
KubernetesClusterTag=k8s
KubernetesClusterID=k8s

解决方案

更改EC2实例标签，KEY= KubernetesCluster，VALUE= k8s（在我的例子中）。

标签： amazon-web-serviceskubernetes

解决方案

由于 weave 网络崩溃，kube-dns 始终处于挂起状态

修复cgroups设置。

  • 添加Environment="KUBELET_CGROUP_ARGS=--cgroup-driver=cgroupfs"到/etc/systemd/system/kubelet.service.d/10-kubeadm.conf.
  • 重启kubelet服务。 
    sudo systemctl deamon-reload
sudo systemctl restart kubelet

在创建kubernetes集群之前安装 weave net 并启动。

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