【发布时间】：2020-06-17 06:11:33
【问题描述】：
希望能得到一点帮助，我的 Google-Fu 并没有让我更接近。我正在尝试为我的 fedora-coreos kubernetes 4 节点集群安装指标服务器，如下所示：
kubectl apply -f deploy/kubernetes/
clusterrole.rbac.authorization.k8s.io/system:aggregated-metrics-reader created
clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator created
rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader created
apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io created
serviceaccount/metrics-server created
deployment.apps/metrics-server created
service/metrics-server created
clusterrole.rbac.authorization.k8s.io/system:metrics-server created
clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created
服务似乎永远不会启动
kubectl describe apiservice v1beta1.metrics.k8s.io
Name: v1beta1.metrics.k8s.io
Namespace:
Labels: <none>
Annotations: kubectl.kubernetes.io/last-applied-configuration:
{"apiVersion":"apiregistration.k8s.io/v1beta1","kind":"APIService","metadata":{"annotations":{},"name":"v1beta1.metrics.k8s.io"},"spec":{"...
API Version: apiregistration.k8s.io/v1
Kind: APIService
Metadata:
Creation Timestamp: 2020-03-04T16:53:33Z
Resource Version: 1611816
Self Link: /apis/apiregistration.k8s.io/v1/apiservices/v1beta1.metrics.k8s.io
UID: 65d9a56a-c548-4d7e-a647-8ce7a865a266
Spec:
Group: metrics.k8s.io
Group Priority Minimum: 100
Insecure Skip TLS Verify: true
Service:
Name: metrics-server
Namespace: kube-system
Port: 443
Version: v1beta1
Version Priority: 100
Status:
Conditions:
Last Transition Time: 2020-03-04T16:53:33Z
Message: failing or missing response from https://10.3.230.59:443/apis/metrics.k8s.io/v1beta1: bad status from https://10.3.230.59:443/apis/metrics.k8s.io/v1beta1: 403
Reason: FailedDiscoveryCheck
Status: False
Type: Available
Events: <none>
我在谷歌上搜索了一下：
kubectl get deploy,svc -n kube-system |egrep metrics-server
deployment.apps/metrics-server 1/1 1 1 8m7s
service/metrics-server ClusterIP 10.3.230.59 <none> 443/TCP 8m7s
kubectl get --raw "/apis/metrics.k8s.io/v1beta1/nodes"
Error from server (ServiceUnavailable): the server is currently unable to handle the request
kubectl get all --all-namespaces | grep -i metrics-server
kube-system pod/metrics-server-75b5d446cd-zj4jm 1/1 Running 0 9m11s
kube-system service/metrics-server ClusterIP 10.3.230.59 <none> 443/TCP 9m11s
kube-system deployment.apps/metrics-server 1/1 1 1 9m11s
kube-system replicaset.apps/metrics-server-75b5d446cd 1 1 1 9m11s
kubectl logs -f metrics-server-75b5d446cd-zj4jm -n kube-system
I0304 16:53:36.475657 1 serving.go:312] Generated self-signed cert (/tmp/apiserver.crt, /tmp/apiserver.key)
W0304 16:53:38.229267 1 authentication.go:296] Cluster doesn't provide requestheader-client-ca-file in configmap/extension-apiserver-authentication in kube-system, so request-header client certificate authentication won't work.
I0304 16:53:38.267760 1 secure_serving.go:116] Serving securely on [::]:4443
kubectl get -n kube-system deployment metrics-server -o yaml | grep -i args -A 10
{"apiVersion":"apps/v1","kind":"Deployment","metadata":{"annotations":{},"labels":{"k8s-app":"metrics-server"},"name":"metrics-server","namespace":"kube-system"},"spec":{"selector":{"matchLabels":{"k8s-app":"metrics-server"}},"template":{"metadata":{"labels":{"k8s-app":"metrics-server"},"name":"metrics-server"},"spec":{"containers":[{"args":["--cert-dir=/tmp","--secure-port=4443","--kubelet-insecure-tls","--kubelet-preferred-address-types=InternalIP"],"image":"k8s.gcr.io/metrics-server-amd64:v0.3.6","imagePullPolicy":"IfNotPresent","name":"metrics-server","ports":[{"containerPort":4443,"name":"main-port","protocol":"TCP"}],"securityContext":{"readOnlyRootFilesystem":true,"runAsNonRoot":true,"runAsUser":1000},"volumeMounts":[{"mountPath":"/tmp","name":"tmp-dir"}]}],"nodeSelector":{"beta.kubernetes.io/os":"linux","kubernetes.io/arch":"amd64"},"serviceAccountName":"metrics-server","volumes":[{"emptyDir":{},"name":"tmp-dir"}]}}}}
creationTimestamp: "2020-03-04T16:53:33Z"
generation: 1
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
resourceVersion: "1611810"
selfLink: /apis/apps/v1/namespaces/kube-system/deployments/metrics-server
uid: 006e758e-bd33-47d7-8378-d3a8081ee8a8
spec:
--
- args:
- --cert-dir=/tmp
- --secure-port=4443
- --kubelet-insecure-tls
- --kubelet-preferred-address-types=InternalIP
image: k8s.gcr.io/metrics-server-amd64:v0.3.6
imagePullPolicy: IfNotPresent
name: metrics-server
ports:
- containerPort: 4443
name: main-port
最后是我的部署配置：
spec:
selector:
matchLabels:
k8s-app: metrics-server
template:
metadata:
name: metrics-server
labels:
k8s-app: metrics-server
spec:
serviceAccountName: metrics-server
volumes:
# mount in tmp so we can safely use from-scratch images and/or read-only containers
- name: tmp-dir
emptyDir: {}
containers:
- name: metrics-server
image: k8s.gcr.io/metrics-server-amd64:v0.3.6
command:
- /metrics-server
- --kubelet-insecure-tls
- --kubelet-preferred-address-types=InternalIP
args:
- --cert-dir=/tmp
- --secure-port=4443
- --kubelet-insecure-tls
- --kubelet-preferred-address-types=InternalIP
ports:
- name: main-port
containerPort: 4443
protocol: TCP
securityContext:
readOnlyRootFilesystem: true
runAsNonRoot: true
runAsUser: 1000
imagePullPolicy: IfNotPresent
volumeMounts:
- name: tmp-dir
mountPath: /tmp
hostNetwork: true
nodeSelector:
beta.kubernetes.io/os: linux
kubernetes.io/arch: "amd64"
我不知道它可以让指标服务启动什么，只是让基本的 kubectl 顶级节点显示我得到的任何信息
Error from server (ServiceUnavailable): the server is currently unable to handle the request (get pods.metrics.k8s.io)
我已经搜索了互联网并尝试添加 args: 和 command: 行但没有运气
command:
- /metrics-server
- --kubelet-insecure-tls
- --kubelet-preferred-address-types=InternalIP
args:
- --cert-dir=/tmp
- --secure-port=4443
- --kubelet-insecure-tls
- --kubelet-preferred-address-types=InternalIP
谁能解释一下如何解决这个问题？谢谢
Pastebin 日志文件 Log File
【问题讨论】：
-
我猜你正在使用
kubeadm。你能提供 kubeadm、kubectl、docker 等的版本吗？还有你用的是什么CNI？我已经在这里遇到过类似的问题：stackoverflow.com/questions/60101398/… 您能否将hostNetwork: true添加到您的部署中？你试过用weave netCNI吗？ -
系统信息：操作系统镜像：Fedora CoreOS 31.20200210.3.0 操作系统：linux 架构：amd64 容器运行时版本：docker://18.9.8 Kubelet 版本：v1.17.3 Kube-Proxy 版本：v1。 17.3
-
CNI 呢？您是否尝试使用
hostNetwork: true运行 metrics-server 部署？ -
我还从我的部署文件中取消了 hostNetwork: true 的注释并且没有变化。
-
您是否也取消了
- --kubelet-preferred-address-types=InternalIP和- --kubelet-insecure-tls的注释？这 2 个标志和hostNetwork: true不能评论