上篇文章中,已经完成了基于kubeadm安装的kubernetes集群,本文将基于上述的集群环境,搭建dashboard组件。

安装环境及版本
kubernetes版本及基础组件版本可参考前一篇安装集群环境的文章

dashboard组件:kubernetes-dashboard-v1.10.1

需准备的镜像:

k8s.gcr.io/kubernetes-dashboard-amd64:v1.10.1           
k8s.gcr.io/heapster-amd64:v1.5.4                        
k8s.gcr.io/heapster-influxdb-amd64:v1.5.2               
k8s.gcr.io/heapster-grafana-amd64:v5.0.4

#!/bin/bash
DASHDOARD_VERSION=v1.10.1
HEAPSTER_VERSION=v1.5.4
GRAFANA_VERSION=v5.0.4
INFLUXDB_VERSION=v1.5.2
username=registry.cn-hangzhou.aliyuncs.com/google_containers
images=(kubernetes-dashboard-amd64:${DASHDOARD_VERSION}heapster-grafana-amd64:${GRAFANA_VERSION}heapster-amd64:${HEAPSTER_VERSION}heapster-influxdb-amd64:${INFLUXDB_VERSION})
for image in ${images[@]}
do
docker pull ${username}/${image}
docker tag ${username}/${image} k8s.gcr.io/${image}
docker rmi ${username}/${image}
done

主节点与个node节点均需要以上镜像:

k8s.gcr.io/kubernetes-dashboard-amd64 v1.10.1    f9aed6605b81 3 months ago 122MB
k8s.gcr.io/heapster-amd64 v1.5.4                 72d68eecf40c 8 months ago 75.3MB
k8s.gcr.io/heapster-influxdb-amd64 v1.5.2        eb180058aee0 8 months ago 16.5MB
k8s.gcr.io/heapster-grafana-amd64 v5.0.4         25e1da333f76 8 months ago 171MB

在主节点上准备部署所需的yaml文件:

dashboard项目官方地址:https://github.com/kubernetes/dashboard/releases

这是作者自己修改过的yaml文件: https://github.com/chopperchan/k8s-dashboard.git

包含有:

kubernetes-dashboard.yaml

# Copyright 2017 The Kubernetes Authors.
#
# 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 compatible with
# Kubernetes 1.8.
#
# Example usage: kubectl create -f <this_file># ------------------- Dashboard Secret ------------------- #apiVersion: v1
kind: Secret
metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard-certsnamespace: kube-system
type: Opaque---
# ------------------- Dashboard Service Account ------------------- #apiVersion: v1
kind: ServiceAccount
metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kube-system---
# ------------------- Dashboard Role & Role Binding ------------------- #kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:name: kubernetes-dashboard-minimalnamespace: kube-system
rules:# Allow Dashboard to create 'kubernetes-dashboard-key-holder' secret.
- apiGroups: [""]resources: ["secrets"]verbs: ["create"]# Allow Dashboard to create 'kubernetes-dashboard-settings' config map.
- apiGroups: [""]resources: ["configmaps"]verbs: ["create"]# Allow Dashboard to get, update and delete Dashboard exclusive secrets.
- apiGroups: [""]resources: ["secrets"]resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs"]verbs: ["get", "update", "delete"]# Allow Dashboard to get and update 'kubernetes-dashboard-settings' config map.
- apiGroups: [""]resources: ["configmaps"]resourceNames: ["kubernetes-dashboard-settings"]verbs: ["get", "update"]# Allow Dashboard to get metrics from heapster.
- apiGroups: [""]resources: ["services"]resourceNames: ["heapster"]verbs: ["proxy"]
- apiGroups: [""]resources: ["services/proxy"]resourceNames: ["heapster", "http:heapster:", "https:heapster:"]verbs: ["get"]---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:name: kubernetes-dashboard-minimalnamespace: kube-system
roleRef:apiGroup: rbac.authorization.k8s.iokind: Rolename: kubernetes-dashboard-minimal
subjects:
- kind: ServiceAccountname: kubernetes-dashboardnamespace: kube-system---
# ------------------- Dashboard Deployment ------------------- #kind: Deployment
apiVersion: apps/v1beta2
metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kube-system
spec:replicas: 1revisionHistoryLimit: 10selector:matchLabels:k8s-app: kubernetes-dashboardtemplate:metadata:labels:k8s-app: kubernetes-dashboardspec:containers:- name: kubernetes-dashboardimage: k8s.gcr.io/kubernetes-dashboard-amd64:v1.10.1ports:- containerPort: 9090protocol: TCPargs:#- --auto-generate-certificates# 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://10.0.1.168:8080
        volumeMounts:- name: kubernetes-dashboard-certsmountPath: /certs# Create on-disk volume to store exec logs- mountPath: /tmpname: tmp-volumelivenessProbe:httpGet:scheme: HTTPpath: /port: 9090initialDelaySeconds: 30timeoutSeconds: 30volumes:- name: kubernetes-dashboard-certssecret:secretName: kubernetes-dashboard-certs- name: tmp-volumeemptyDir: {}serviceAccountName: kubernetes-dashboard-admin# Comment the following tolerations if Dashboard must not be deployed on mastertolerations:- key: node-role.kubernetes.io/mastereffect: NoSchedule---
# ------------------- Dashboard Service ------------------- #kind: Service
apiVersion: v1
metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kube-system
spec:ports:- port: 9090targetPort: 9090selector:k8s-app: kubernetes-dashboard# ------------------------------------------------------------
kind: Service
apiVersion: v1
metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard-externalnamespace: kube-system
spec:ports:- port: 9090targetPort: 9090nodePort: 31666type: NodePortselector:k8s-app: kubernetes-dashboard

kubernetes-dashboard-admin.rbac.yaml

---
apiVersion: v1
kind: ServiceAccount
metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard-adminnamespace: kube-system---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:name: kubernetes-dashboard-adminlabels:k8s-app: kubernetes-dashboard
roleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: cluster-admin
subjects:
- kind: ServiceAccountname: kubernetes-dashboard-adminnamespace: kube-system

heapster.yaml

apiVersion: v1
kind: ServiceAccount
metadata:name: heapsternamespace: kube-system
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:name: heapsternamespace: kube-system
spec:replicas: 1template:metadata:labels:task: monitoringk8s-app: heapsterspec:serviceAccountName: heapstercontainers:- name: heapsterimage: k8s.gcr.io/heapster-amd64:v1.5.4imagePullPolicy: IfNotPresentcommand:- /heapster- --source=kubernetes:https://kubernetes.default- --sink=influxdb:http://monitoring-influxdb.kube-system.svc:8086
---
apiVersion: v1
kind: Service
metadata:labels:task: monitoring# For use as a Cluster add-on (https://github.com/kubernetes/kubernetes/tree/master/cluster/addons)# If you are NOT using this as an addon, you should comment out this line.kubernetes.io/cluster-service: 'true'kubernetes.io/name: Heapstername: heapsternamespace: kube-system
spec:ports:- port: 80targetPort: 8082selector:k8s-app: heapster

heapster-rbac.yaml

kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:name: heapster
roleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: system:heapster
subjects:
- kind: ServiceAccountname: heapsternamespace: kube-system

官方的文件中只包含了kubernetes-dashboard.yaml,且kubernetes在1.6版本以后启用了RBAC访问控制策略,直接使用官方版会出现访问权限不足的报错

此问题可使用kubectl或Kubernetes API进行配置。使用RBAC可以直接授权给用户,让用户拥有授权管理的权限,这样就不再需要直接触碰Master Node。

相关修改为:

kubernetes-dashboard.yaml 中修改 serviceAccountName,外部访问dashboard的方式(本文为token访问)

kubernetes-dashboard-admin(默认为kubernetes-dashboard)

kind: Service
apiVersion: v1
metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard-externalnamespace: kube-system
spec:ports:- port: 9090targetPort: 9090nodePort: 31666type: NodePortselector:k8s-app: kubernetes-dashboard

在kubernetes-dashboard-admin.rbac.yaml中则是执行了创建kubernetes-dashboard-admin用户并赋予所有权限的命令

PS:yaml中涉及的image版本请根据自己实际情况调整

安装dashboard及相关组件

ll
#以下内容其中grafana和influxdb是作者自己增加的,读者可不用部署
-rw-r--r-- 1 root root 2314 4月   3 10:02 grafana.yaml
-rw-r--r-- 1 root root  264 11月 23 15:19 heapster-rbac.yaml
-rw-r--r-- 1 root root 1100 4月   3 09:52 heapster.yaml
-rw-r--r-- 1 root root  998 4月   3 10:02 influxdb.yaml
-rw-r--r-- 1 root root  504 4月   3 10:13 kubernetes-dashboard-admin.rbac.yaml
-rw-r--r-- 1 root root 5132 4月   3 12:40 kubernetes-dashboard.yaml#执行安装
kubectl apply -n kube-system -f .#执行完成后查看pod是否正常运行
kubectl get pod -n kube-system |grep kubernetes-dashboardkubernetes-dashboard-6cfdc589c7-krfmk   1/1     Running   0          164m#查看服务暴露的端口号
kubectl get service  -n kube-system |grep kubernetes-dashboard
kubernetes-dashboard-external   NodePort    10.98.178.105    <none>        9090:31666/TCP           168m

Running状态说明运行正常,直接可通过masterip:端口号访问ui界面。

读者可根据需要修改nodePort参数来修改访问端口。

可能会遇到的问题
访问时出现权限不足

解决方法:

执行本文中的kubernetes-dashboard-admin.rbac.yaml,或读者自行创建serviceAccount,并修改kubernetes-dashboard.yml中serviceAccount参数为你创建的用户名称

转载于:https://www.cnblogs.com/ling-yu-amen/p/10955094.html

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