例如:可以使用部署向导扩展部署,启动滚动更新,重新启动 Pod 或部署新应用程序。仪表盘还提供有关集群中 Kubernetes 资源状态以及可能发生的任何错误的信息。
接上篇
Kubernetes 二进制方式集群部署(单/多 master)
[root@master01 ~]# mkdir /opt/k8s/dashboard
[root@master01 ~]# cd !$
cd /opt/k8s/dashboard
[root@master01 dashboard]# rz -E
#上传 Dashboard.zip 压缩包
rz waiting to receive.
[root@master01 dashboard]# unzip Dashboard.zip
#解压
Archive: Dashboard.zipinflating: dashboard-configmap.yaml inflating: dashboard-controller.yaml inflating: dashboard-rbac.yaml inflating: dashboard-secret.yaml inflating: dashboard-service.yaml inflating: k8s-admin.yaml inflating: dashboard-cert.sh
[root@master01 dashboard]# ls
dashboard-cert.sh dashboard-controller.yaml dashboard-secret.yaml Dashboard.zip
dashboard-configmap.yaml dashboard-rbac.yaml dashboard-service.yaml k8s-admin.yaml
核心文件 | 说明 |
---|---|
dashboard-rbac.yaml | 用于访问控制设置,配置各种角色的访问控制权限及角色绑定(绑定角色和服务账户),内容中包含对应各种角色所配置的规则(rules) |
dashboard-secret.yaml | 提供令牌,访问API服务器所用(个人理解为一种安全认证机制) |
dashboard-configmap.yaml | 配置模板文件,负责设置Dashboard的文件,ConfigMap提供了将配置数据注入容器的方式,保证容器中的应用程序配置从Image内容中解耦 |
dashboard-controller.yaml | 负责控制器即服务账户的创建,来管理pod副本 |
dashboard-service.yaml | 负责将容器中的服务提供出去,供外部访问 |
Dashboard一共有7个文件,其中包含5个构建该界面的核心文件,一个k8s-admin.yaml文件是自己写的,用来生成待会在浏览器中登录时所用的令牌;一个dashboard-cert.sh,用来快速生成解决谷歌浏览器加密通信所需的证书文件。 | |
核心文件官方下载资源地址: |
[root@master01 dashboard]# cat dashboard-rbac.yaml
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:labels:k8s-app: kubernetes-dashboardaddonmanager.kubernetes.io/mode: Reconcilename: kubernetes-dashboard-minimalnamespace: kube-system
rules:# 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-systemlabels:k8s-app: kubernetes-dashboardaddonmanager.kubernetes.io/mode: Reconcile
roleRef:apiGroup: rbac.authorization.k8s.iokind: Rolename: kubernetes-dashboard-minimal
subjects:
- kind: ServiceAccountname: kubernetes-dashboardnamespace: kube-system#主要参数说明:
#kind: ServiceAccount 创建service用户,k8s中有两种用户,一种是ServiceAccount(给集群中的pod来访问集群用的),还有一种是具体的user(给咱们用户使用)
#metadata 创建资源对象的一些元数据
#labels 标签信息
#name 资源对象名称
#namespace 命令空间
#kind: ClusterRoleBinding 创建用于集群绑定的角色,可以帮ServiceAccount绑定到具体的角色中、组中,使它有相应的访问权限
#kind: ClusterRole k8s中有两种角色,一种是ClusterRole(针对于整个集群的命名空间都起作用),还有一种是普通的角色(只对单个命名空间起作用)
[root@master01 dashboard]# cat dashboard-secret.yaml
apiVersion: v1
kind: Secret
metadata:labels:k8s-app: kubernetes-dashboard# Allows editing resource and makes sure it is created first.addonmanager.kubernetes.io/mode: EnsureExistsname: kubernetes-dashboard-certsnamespace: kube-system
type: Opaque
---
apiVersion: v1
kind: Secret
metadata:labels:k8s-app: kubernetes-dashboard# Allows editing resource and makes sure it is created first.addonmanager.kubernetes.io/mode: EnsureExistsname: kubernetes-dashboard-key-holdernamespace: kube-system
type: Opaque
[root@master01 dashboard]# cat dashboard-configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:labels:k8s-app: kubernetes-dashboard# Allows editing resource and makes sure it is created first.addonmanager.kubernetes.io/mode: EnsureExistsname: kubernetes-dashboard-settingsnamespace: kube-system
[root@master01 dashboard]# cat dashboard-controller.yaml
apiVersion: v1
kind: ServiceAccount
metadata:labels:k8s-app: kubernetes-dashboardaddonmanager.kubernetes.io/mode: Reconcilename: kubernetes-dashboardnamespace: kube-system
---
apiVersion: apps/v1
kind: Deployment
metadata:name: kubernetes-dashboardnamespace: kube-systemlabels:k8s-app: kubernetes-dashboardkubernetes.io/cluster-service: "true"addonmanager.kubernetes.io/mode: Reconcile
spec:selector:matchLabels:k8s-app: kubernetes-dashboardtemplate:metadata:labels:k8s-app: kubernetes-dashboardannotations:scheduler.alpha.kubernetes.io/critical-pod: ''seccomp.security.alpha.kubernetes.io/pod: 'docker/default'spec:priorityClassName: system-cluster-criticalcontainers:- name: kubernetes-dashboardimage: siriuszg/kubernetes-dashboard-amd64:v1.8.3resources:limits:cpu: 100mmemory: 300Mirequests:cpu: 50mmemory: 100Miports:- containerPort: 8443protocol: TCPargs:# PLATFORM-SPECIFIC ARGS HERE- --auto-generate-certificatesvolumeMounts:- name: kubernetes-dashboard-certsmountPath: /certs- name: tmp-volumemountPath: /tmplivenessProbe:httpGet:scheme: HTTPSpath: /port: 8443initialDelaySeconds: 30timeoutSeconds: 30volumes:- name: kubernetes-dashboard-certssecret:secretName: kubernetes-dashboard-certs- name: tmp-volumeemptyDir: {}serviceAccountName: kubernetes-dashboardtolerations:- key: "CriticalAddonsOnly"operator: "Exists"#主要参数说明:
#kind: Deployment 是整个集群中使用最频繁的对象,咱们应用服务一般都是使用Deployment来创建
#spec.selector.matchLabels 匹配某个标签
#plate.spec.serviceAccountName 指定创建的serviceAccount,使用该账户来访问集群
#sources 对容器使用资源限制
#ainerPort 指定暴露的端口
#ainers.livenessProbe 健康检查
#ainers.livenessProbe.initialDelaySeconds 检查间隔时间设置
#ainers.livenessProbe.timeoutSeconds 检查超时设置
[root@master01 dashboard]# cat dashboard-service.yaml
apiVersion: v1
kind: Service
metadata:name: kubernetes-dashboardnamespace: kube-systemlabels:k8s-app: kubernetes-dashboardkubernetes.io/cluster-service: "true"addonmanager.kubernetes.io/mode: Reconcile
spec:type: NodePortselector:k8s-app: kubernetes-dashboardports:- port: 443targetPort: 8443nodePort: 30001#主要参数说明:
#type: NodePort 可以通过在节点上使用nodeIP+端口访问服务
#spec.ports.port 为service在clusterIP暴露的端口
#spec.ports.targetPort 对应容器映射在pod上的端口
#dePort 为nodeIP暴露的端口
[root@master01 dashboard]# cat k8s-admin.yaml
apiVersion: v1
kind: ServiceAccount
metadata:name: dashboard-adminnamespace: kube-system
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:name: dashboard-admin
subjects:- kind: ServiceAccountname: dashboard-adminnamespace: kube-system
roleRef:kind: ClusterRolename: cluster-adminapiGroup: rbac.authorization.k8s.io
[root@master01 dashboard]# cat dashboard-cert.sh
#!/bin/bash
#examle: ./dashboard-cert.sh /opt/k8s/k8s-cert/cat > dashboard-csr.json <<EOF
{"CN": "Dashboard","hosts": [],"key": {"algo": "rsa","size": 2048},"names": [{"C": "CN","L": "BeiJing","ST": "BeiJing"}]
}
EOF#定义一个变量,使用位置变量赋值,作用是指定你证书(依赖证书)的位置
K8S_CA=$1
#根据指定位置的证书进行创建和自签操作
cfssl gencert -ca=$K8S_CA/ca.pem -ca-key=$K8S_CA/ca-key.pem -config=$K8S_CA/ca-config.json -profile=kubernetes dashboard-csr.json | cfssljson -bare dashboard#生成的文件:
#dashboard.csr:证书请求文件
#dashboard-key.pem:证书私钥
#dashboard.pem:数字签名证书#清空命名空间中的认证
kubectl delete secret kubernetes-dashboard-certs -n kube-system
#重新创建生成到指定的目录中(当前目录)
kubectl create secret generic kubernetes-dashboard-certs --from-file=./ -n kube-system
规定 kubernetes-dashboard-minimal 该角色的权限:例如其中具备获取更新删除等不同的权限
[root@master01 dashboard]# kubectl create -f dashboard-rbac.yaml
role.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
#有几个kind就会有几个结果被创建,格式为kind+apiServer/name
查看类型为 Role,RoleBinding 的资源对象 kubernetes-dashboard-minimal 是否生成
[root@master01 /opt/k8s/dashboard]# kubectl get role,rolebinding -n kube-system
# -n kube-system 表示查看指定命名空间中的 pod,缺省值为 default
NAME AGE
role.rbac.authorization.k8s.io/extension-apiserver-authentication-reader 38h
role.rbac.authorization.k8s.io/kubernetes-dashboard-minimal 47s
role.rbac.authorization.k8s.io/system::leader-locking-kube-controller-manager 38h
role.rbac.authorization.k8s.io/system::leader-locking-kube-scheduler 38h
role.rbac.authorization.k8s.io/system:controller:bootstrap-signer 38h
role.rbac.authorization.k8s.io/system:controller:cloud-provider 38h
role.rbac.authorization.k8s.io/system:controller:token-cleaner 38hNAME AGE
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard-minimal 47s
rolebinding.rbac.authorization.k8s.io/system::leader-locking-kube-controller-manager 38h
rolebinding.rbac.authorization.k8s.io/system::leader-locking-kube-scheduler 38h
rolebinding.rbac.authorization.k8s.io/system:controller:bootstrap-signer 38h
rolebinding.rbac.authorization.k8s.io/system:controller:cloud-provider 38h
rolebinding.rbac.authorization.k8s.io/system:controller:token-cleaner 38h
证书和密钥创建
[root@master01 dashboard]# kubectl create -f dashboard-secret.yaml
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-key-holder created
查看类型为 Secret 的资源对象 kubernetes-bashboard-crets,kubernetes-dashboard-key-holder 是否生成
[root@master01 /opt/k8s/dashboard]# kubectl get secret -n kube-system
NAME TYPE DATA AGE
default-token-5j96x kubernetes.io/service-account-token 3 38h
kubernetes-dashboard-certs Opaque 0 29s
kubernetes-dashboard-key-holder Opaque 0 29s
配置文件,对于集群 dashboard 设置的创建
[root@master01 dashboard]# kubectl create -f dashboard-configmap.yaml
configmap/kubernetes-dashboard-settings created
查看类型为 ConfigMap 的资源对象 kubernetes-dashboard-settings 是否生成
[root@master01 /opt/k8s/dashboard]# kubectl get configmap -n kube-system
NAME DATA AGE
extension-apiserver-authentication 1 38h
kubernetes-dashboard-settings 0 39s
创建容器需要的控制器以及服务账户
[root@master01 /opt/k8s/dashboard]# kubectl create -f dashboard-controller.yaml
serviceaccount/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
查看类型为 ServiceAccount,Deployment 的资源对象 kubernetes-dashboard-setting 是否生成
[root@master01 /opt/k8s/dashboard]# kubectl get serviceaccount,deployment -n kube-system
NAME SECRETS AGE
serviceaccount/default 1 38h
serviceaccount/kubernetes-dashboard 1 9sNAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
sions/kubernetes-dashboard 1 1 1 0 9s
将服务发布出去
[root@master01 /opt/k8s/dashboard]# kubectl create -f dashboard-service.yaml
service/kubernetes-dashboard created
查看创建在指定的 kube-system 命名空间下的 pod 和 service 状态信息
[root@master01 /opt/k8s/dashboard]# kubectl get pods,svc -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
pod/kubernetes-dashboard-65f974f565-tjj6b 0/1 ContainerCreating 0 77s <none> 192.168.10.102 <none>NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/kubernetes-dashboard NodePort 10.0.0.22 <none> 443:30001/TCP 8s k8s-app=kubernetes-dashboard
为提高速度,我这里已将 siriuszg/kubernetes-dashboard-amd64:v1.8.3 镜像压缩成 tar 包,在 node 节点释放该镜像。该步骤也可省略,node节点会通过kubernetes公有仓库去自动拉取该镜像。
[root@node01 ~]# cd /opt
[root@node01 opt]# rz -E
#上传镜像包 dashboard.tar
rz waiting to receive.
[root@node01 opt]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 87a94228f133 2 weeks ago 133MB
centos 7 eeb6ee3f44bd 6 weeks ago 204MB
nginx 1.14 295c7be07902 2 years ago 109MB
registry-hangzhou.aliyuncs/google-containers/pause-amd64 3.0 99e59f495ffa 5 years ago 747kB
[root@node01 opt]# docker load -i dashboard.tar
#载入该镜像
23ddb8cbb75a: Loading layer [==================================================>] 102.8MB/102.8MB
Loaded image: siriuszg/kubernetes-dashboard-amd64:v1.8.3
[root@node01 opt]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 87a94228f133 2 weeks ago 133MB
centos 7 eeb6ee3f44bd 6 weeks ago 204MB
nginx 1.14 295c7be07902 2 years ago 109MB
siriuszg/kubernetes-dashboard-amd64 v1.8.3 784cf2722f44 3 years ago 102MB
registry-hangzhou.aliyuncs/google-containers/pause-amd64 3.0 99e59f495ffa 5 years ago 747kB
不同浏览器的安全访问策略和防护级别是不同的,由于我们没有给 dashboard 做证书,因此使用不同的浏览器可能会出现不同的效果,本次使用我们最常用的 Edge/Chrome、火狐以及 360 浏览器进行测试。
由于 dashboard-service.yaml 定义的 nodePort:30001,因此我们的测试地址应该是 pod 所属 node 的 30001 端口。
无法访问,由于Edge使用的是Chrome内核,因此Google的Chrome也是相同效果,可通过以下步骤查看问题。
chrome浏览器在Security项下查看
发现问题是缺少证书,那么我们为其制作证书即可。
[root@master01 dashboard]# cd /opt/k8s/dashboard/
[root@master01 dashboard]# vim dashboard-controller.yaml ......args:# PLATFORM-SPECIFIC ARGS HERE
##在文件的第47行下面添加以下两行,指定加密(tls)的私钥和证书文件- --auto-generate-certificates- --tls-key-file=dashboard-key.pem- --tls-cert-file=dashboard.pem
[root@master01 dashboard]# cd /opt/k8s/dashboard/
[root@master01 dashboard]# chmod +x dashboard-cert.sh
[root@master01 dashboard]# ./dashboard-cert.sh /opt/k8s/k8s-cert/
2021/12/15 15:17:42 [INFO] generate received request
2021/12/15 15:17:42 [INFO] received CSR
2021/12/15 15:17:42 [INFO] generating key: rsa-2048
2021/12/15 15:17:43 [INFO] encoded CSR
2021/12/15 15:17:43 [INFO] signed certificate with serial number 696681652040737173254131939262711284615599431272
2021/12/15 15:17:43 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum ();
specifically, section 10.2.3 ("Information Requirements").
secret "kubernetes-dashboard-certs" deleted
secret/kubernetes-dashboard-certs created
[root@master01 dashboard]# ls *.pem
dashboard-key.pem dashboard.pem
注意:当 apply 不生效时,先使用 delete 清除资源,再 apply 创建资源
[root@master01 /opt/k8s/dashboard]# kubectl delete -f dashboard-controller.yaml
serviceaccount "kubernetes-dashboard" deleted
deployment.apps "kubernetes-dashboard" deleted[root@master01 /opt/k8s/dashboard]# kubectl apply -f dashboard-controller.yaml
serviceaccount/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
由于可能会更换所分配的节点,所以要再次查看一下分配的节点服务器地址和端口号
[root@master01 ~]# kubectl get pods,svc -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
pod/kubernetes-dashboard-7dffbccd68-thw4t 1/1 Running 0 63s 172.17.5.3 192.168.10.102 <none>NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/kubernetes-dashboard NodePort 10.0.0.22 <none> 443:30001/TCP 47m k8s-app=kubernetes-dashboard
到此页面,说明可以访问,保持该页面,测试下一个浏览器。
360 浏览器虽然显示证书风险,但未出现任何阻止浏览或风险提示窗口,直接可进入登录页面。
[root@master01 dashboard]# kubectl create -f k8s-admin.yaml
serviceaccount/dashboard-admin created
clusterrolebinding.rbac.authorization.k8s.io/dashboard-admin created
[root@master01 /opt/k8s/dashboard]# kubectl get secrets -n kube-system
NAME TYPE DATA AGE
dashboard-admin-token-r66j7 kubernetes.io/service-account-token 3 3s
default-token-5j96x kubernetes.io/service-account-token 3 39h
kubernetes-dashboard-certs Opaque 12 13m
kubernetes-dashboard-key-holder Opaque 2 65m
kubernetes-dashboard-token-t98m9 kubernetes.io/service-account-token 3 9m55s
[root@master01 /opt/k8s/dashboard]# kubectl describe secrets dashboard-admin-token-r66j7 -n kube-system
Name: dashboard-admin-token-r66j7
Namespace: kube-system
Labels: <none>
Annotations: kubernetes.io/service-account.name: dashboard-adminkubernetes.io/service-account.uid: 00618adf-5d79-11ec-99b8-000c29cc0667Type: kubernetes.io/service-account-tokenData
====
ca.crt: 1359 bytes
namespace: 11 bytes
token: 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.SpizbfuUueNA8G0T04f80x--lkGYSM-YJ9UqEmeT0fMswIk-OhJJd0hHyKxSq7xtjJVlSgpL5-UIiY4bbkLvS55mX7EivlHJxJ30CpxcHir27ZTHFalzRrl0ZpBe-vHfFlS1ylWhK12OYJR1Hr6ZZfqCRbGUeTBHKFl02yh9EeI1OxIVJzcfujqyTItXjiqmC41PpfnJAWHEksYdGbQAsOpXYmgM8g0yc9Mkn1B_ykz1vMoYCoYHSGiXQHZmi1BY31WH6JDB-v43SJVdKxVm9YTnu1ZGLP4PTXduI_4bPCidij50yYknvsHbI3xiUBjxqjLU06b7sqPbMuNeVejEmQ
将令牌序列号复制填入到浏览器页面中,点击登录
[root@node01 /opt]# curl 172.17.84.3
this is a test web
设定完成后,点击部署
完成部署,通过 master 节点查看
[root@master01 ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-01-5c7c59bcd8-26csj 1/1 Running 0 2m50s
nginx-01-5c7c59bcd8-m7xjg 1/1 Running 0 2m50s
nginx-01-5c7c59bcd8-xzlt2 1/1 Running 0 2m50s
nginx-test-7dc4f9dcc9-wj6d7 1/1 Running 0 23h
[root@master01 ~]# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
nginx-01-5c7c59bcd8-26csj 1/1 Running 0 2m54s 172.17.5.3 192.168.10.102 <none>
nginx-01-5c7c59bcd8-m7xjg 1/1 Running 0 2m54s 172.17.5.4 192.168.10.102 <none>
nginx-01-5c7c59bcd8-xzlt2 1/1 Running 0 2m54s 172.17.84.5 192.168.10.101 <none>
nginx-test-7dc4f9dcc9-wj6d7 1/1 Running 0 23h 172.17.84.3 192.168.10.101 <none>
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