kube-apiserver 位于何处 [英] Where is kube-apiserver located

问题描述

基本问题:当我尝试在主节点上使用 kube-apiserver 时，出现命令未找到错误.如何安装/配置 kube-apiserver?任何示例链接都会有所帮助.

Base question: When I try to use kube-apiserver on my master node, I get command not found error. How I can install/configure kube-apiserver? Any link to example will help.

$ kube-apiserver --enable-admission-plugins DefaultStorageClass
-bash: kube-apiserver: command not found

详细信息:我是 Kubernetes 和 Docker 的新手，正在尝试使用 volumeClaimTemplates 创建 StatefulSet.我的问题是没有创建自动 PV，我在 PVC 日志中收到此消息:persistentvolume-controller waiting for a volume to be created".我不确定是否需要定义 DefaultStorageClass，因此需要 kube-apiserver 来定义它.

Details: I am new to Kubernetes and Docker and was trying to create StatefulSet with volumeClaimTemplates. My problem is that the automatic PVs are not created and I get this message in the PVC log: "persistentvolume-controller waiting for a volume to be created". I am not sure if I need to define DefaultStorageClass and so needed kube-apiserver to define it.

Name:          nfs
Namespace:     default
StorageClass:  example-nfs
Status:        Pending
Volume:
Labels:        <none>
Annotations:   volume.beta.kubernetes.io/storage-provisioner=example.com/nfs
Finalizers:    [kubernetes.io/pvc-protection]
Capacity:
Access Modes:
Events:
  Type    Reason                Age                  From                         Message
  ----    ------                ----                 ----                         -------
  Normal  ExternalProvisioning  3m (x2401 over 10h)  persistentvolume-controller  waiting for a volume to be created, either by external provisioner "example.com/nfs" or manually created by system administrator

这里是得到 pvc 结果:

Here is get pvc result:

$ kubectl get pvc
NAME      STATUS    VOLUME    CAPACITY   ACCESS MODES   STORAGECLASS   AGE
nfs       Pending                                       example-nfs    10h

并获取存储类:

$ kubectl describe storageclass example-nfs
Name:                  example-nfs
IsDefaultClass:        No
Annotations:           <none>
Provisioner:           example.com/nfs
Parameters:            <none>
AllowVolumeExpansion:  <unset>
MountOptions:          <none>
ReclaimPolicy:         Delete
VolumeBindingMode:     Immediate
Events:                <none>

如何解决此问题(例如未创建存储的原因的日志)?

How can I troubleshoot this issue (e.g. logs for why the storage was not created)?

推荐答案

您在这里问了两个不同的问题，一个关于 kube-apiserver 配置，一个关于对 StorageClass 进行故障排除.

You are asking two different questions here, one about kube-apiserver configuration, one about troubleshooting your StorageClass.

这是您的第一个问题的答案:

Here's an answer for your first question:

kube-apiserver 在您的主节点上作为 Docker 容器运行.因此，二进制文件在容器内，而不是在您的主机系统上.它由 master 的 kubelet 从位于 /etc/kubernetes/manifests 的文件中启动.kubelet 正在监视此目录，并将启动此处定义为静态 Pod"的任何 Pod.

kube-apiserver is running as a Docker container on your master node. Therefore, the binary is within the container, not on your host system. It is started by the master's kubelet from a file located at /etc/kubernetes/manifests. kubelet is watching this directory and will start any Pod defined here as "static pods".

要配置 kube-apiserver 命令行参数，您需要修改 master 上的 /etc/kubernetes/manifests/kube-apiserver.yaml.

To configure kube-apiserver command line arguments you need to modify /etc/kubernetes/manifests/kube-apiserver.yaml on your master.

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