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azure - 如何在service-node-port-range默认范围之外的NodePort上启动kubernetes服务?

转载 作者:行者123 更新时间:2023-12-05 00:52:43 27 4
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我一直在尝试在默认端口范围之外的 NodePort 上启动 kubernetes-dashboard(以及最终的其他服务),但收效甚微,这是我的设置:云提供商:Azure(不是Azure容器服务)操作系统:CentOS 7

这是我尝试过的:

更新主机

$ yum update

安装 kubeadm

$ cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://yum.kubernetes.io/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg
https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF
$ setenforce 0
$ yum install -y docker kubelet kubeadm kubectl kubernetes-cni
$ systemctl enable docker && systemctl start docker
$ systemctl enable kubelet && systemctl start kubelet

使用 kubeadm 启动集群

$ kubeadm init

允许在主节点上运行容器,因为我们有一个单节点集群

$ kubectl taint nodes --all dedicated-

安装 Pod 网络

$ kubectl apply -f https://git.io/weave-kube

我们的 kubernetes-dashboard 部署 (@ ~/kubernetes-dashboard.yaml

# Copyright 2015 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Configuration to deploy release version of the Dashboard UI.
#
# Example usage: kubectl create -f <this_file>

kind: Deployment
apiVersion: extensions/v1beta1
metadata:
labels:
app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kube-system
spec:
replicas: 1
selector:
matchLabels:
app: kubernetes-dashboard
template:
metadata:
labels:
app: kubernetes-dashboard
# Comment the following annotation if Dashboard must not be deployed on master
annotations:
scheduler.alpha.kubernetes.io/tolerations: |
[
{
"key": "dedicated",
"operator": "Equal",
"value": "master",
"effect": "NoSchedule"
}
]
spec:
containers:
- name: kubernetes-dashboard
image: gcr.io/google_containers/kubernetes-dashboard-amd64:v1.5.1
imagePullPolicy: Always
ports:
- containerPort: 9090
protocol: TCP
args:
# Uncomment the following line to manually specify Kubernetes API server Host
# If not specified, Dashboard will attempt to auto discover the API server and connect
# to it. Uncomment only if the default does not work.
# - --apiserver-host=http://my-address:port
livenessProbe:
httpGet:
path: /
port: 9090
initialDelaySeconds: 30
timeoutSeconds: 30
---
kind: Service
apiVersion: v1
metadata:
labels:
app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kube-system
spec:
type: NodePort
ports:
- port: 8880
targetPort: 9090
nodePort: 8880
selector:
app: kubernetes-dashboard

创建我们的部署

$ kubectl create -f ~/kubernetes-dashboard.yaml
deployment "kubernetes-dashboard" created
The Service "kubernetes-dashboard" is invalid: spec.ports[0].nodePort: Invalid value: 8880: provided port is not in the valid range. The range of valid ports is 30000-32767

我发现要更改有效端口的范围,我可以在 kube-apiserver 上设置 service-node-port-range 选项以允许不同的端口范围,所以我尝试了这个:

$ kubectl get po --namespace=kube-system
NAME READY STATUS RESTARTS AGE
dummy-2088944543-lr2zb 1/1 Running 0 31m
etcd-test2-highr 1/1 Running 0 31m
kube-apiserver-test2-highr 1/1 Running 0 31m
kube-controller-manager-test2-highr 1/1 Running 2 31m
kube-discovery-1769846148-wmbhb 1/1 Running 0 31m
kube-dns-2924299975-8vwjm 4/4 Running 0 31m
kube-proxy-0ls9c 1/1 Running 0 31m
kube-scheduler-test2-highr 1/1 Running 2 31m
kubernetes-dashboard-3203831700-qrvdn 1/1 Running 0 22s
weave-net-m9rxh 2/2 Running 0 31m

将“--service-node-port-range=8880-8880”添加到 kube-apiserver-test2-highr

$ kubectl edit po kube-apiserver-test2-highr --namespace=kube-system
{
"kind": "Pod",
"apiVersion": "v1",
"metadata": {
"name": "kube-apiserver",
"namespace": "kube-system",
"creationTimestamp": null,
"labels": {
"component": "kube-apiserver",
"tier": "control-plane"
}
},
"spec": {
"volumes": [
{
"name": "k8s",
"hostPath": {
"path": "/etc/kubernetes"
}
},
{
"name": "certs",
"hostPath": {
"path": "/etc/ssl/certs"
}
},
{
"name": "pki",
"hostPath": {
"path": "/etc/pki"
}
}
],
"containers": [
{
"name": "kube-apiserver",
"image": "gcr.io/google_containers/kube-apiserver-amd64:v1.5.3",
"command": [
"kube-apiserver",
"--insecure-bind-address=127.0.0.1",
"--admission-control=NamespaceLifecycle,LimitRanger,ServiceAccount,PersistentVolumeLabel,DefaultStorageClass,ResourceQuota",
"--service-cluster-ip-range=10.96.0.0/12",
"--service-node-port-range=8880-8880",
"--service-account-key-file=/etc/kubernetes/pki/apiserver-key.pem",
"--client-ca-file=/etc/kubernetes/pki/ca.pem",
"--tls-cert-file=/etc/kubernetes/pki/apiserver.pem",
"--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem",
"--token-auth-file=/etc/kubernetes/pki/tokens.csv",
"--secure-port=6443",
"--allow-privileged",
"--advertise-address=100.112.226.5",
"--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname",
"--anonymous-auth=false",
"--etcd-servers=http://127.0.0.1:2379"
],
"resources": {
"requests": {
"cpu": "250m"
}
},
"volumeMounts": [
{
"name": "k8s",
"readOnly": true,
"mountPath": "/etc/kubernetes/"
},
{
"name": "certs",
"mountPath": "/etc/ssl/certs"
},
{
"name": "pki",
"mountPath": "/etc/pki"
}
],
"livenessProbe": {
"httpGet": {
"path": "/healthz",
"port": 8080,
"host": "127.0.0.1"
},
"initialDelaySeconds": 15,
"timeoutSeconds": 15,
"failureThreshold": 8
}
}
],
"hostNetwork": true
},
"status": {}

$ :wq

以下是截断的响应

# pods "kube-apiserver-test2-highr" was not valid:
# * spec: Forbidden: pod updates may not change fields other than `containers[*].image` or `spec.activeDeadlineSeconds`

所以我尝试了一种不同的方法,我编辑了 kube-apiserver 的部署文件,并进行了与上述相同的更改并运行以下命令:

$ kubectl apply -f /etc/kubernetes/manifests/kube-apiserver.json --namespace=kube-system

得到了这样的回复:

The connection to the server localhost:8080 was refused - did you specify the right host or port?

现在我陷入困境,如何更改有效端口的范围?

最佳答案

您指定的 --service-node-port-range=8880-8880 错误。您仅将其设置为一个端口,将其设置为一个范围。

第二个问题:您将服务设置为使用 9090,但它不在范围内。

 ports:
- port: 80
targetPort: 9090
nodePort: 9090

API 服务器也应该有一个部署,尝试在部署本身中编辑端口范围并删除 api 服务器 pod,以便通过新配置重新创建它。

关于azure - 如何在service-node-port-range默认范围之外的NodePort上启动kubernetes服务?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/42440125/

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