K8S——关于K8S控制台的yaml文件编写（基于上一章多节点K8S部署）

Posted 2021-06-29 小白的成功进阶之路

K8S——关于K8S控制台的yaml文件编写（基于上一章多节点K8S部署）

• 一、yaml文件编写流程
• 二、证书自签

一、yaml文件编写流程

rbac.yaml---->secret.yaml---->configmap.yaml---->controller.yaml----->dashboard.yaml

#dashboard-rbac.yaml文件
vim dashboard-rbac.yaml
kind: Role				#角色
apiVersion: rbac.authorization.k8s.io/v1	#api版本号（有专门的版本号控制）
metadata:			#源信息
  labels:
    k8s-app: kubernetes-dashboard
    addonmanager.kubernetes.io/mode: Reconcile
  name: kubernetes-dashboard-minimal	#创建的资源名称
  namespace: kube-system
rules:				#参数信息的传入
  # 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-minimal
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    addonmanager.kubernetes.io/mode: Reconcile
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: kubernetes-dashboard-minimal
subjects:
- kind: ServiceAccount
  name: kubernetes-dashboard
  namespace: kube-system	#名称空间的管理（默认为default）

#创建dashboard-rbac.yaml资源
kubectl create -f dashboard-rbac.yaml 

#使用-n 查看Role角色kube-system名称空间中的资源
kubectl get Role -n kube-system
------------------------------------------------------------------------
#dashboard-secret.yaml文件
vim dashboard-secret.yaml 
apiVersion: v1
kind: Secret		#角色
metadata:			#源信息
  labels:
    k8s-app: kubernetes-dashboard
    # Allows editing resource and makes sure it is created first.
    addonmanager.kubernetes.io/mode: EnsureExists
  name: kubernetes-dashboard-certs	#资源名称
  namespace: kube-system		#命名空间
type: Opaque
---						#--- 分段
apiVersion: v1
kind: Secret
metadata:
  labels:
    k8s-app: kubernetes-dashboard
    # Allows editing resource and makes sure it is created first.
    addonmanager.kubernetes.io/mode: EnsureExists
  name: kubernetes-dashboard-key-holder		#密钥
  namespace: kube-system
type: Opaque

#创建dashboard-secret.yaml 资源
kubectl create -f dashboard-secret.yaml
kubectl get Secret -n kube-system
------------------------------------------------------------------------
#dashboard-configmap.yaml 配置管理文件
vim 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: EnsureExists
  name: kubernetes-dashboard-settings
  namespace: kube-system

#创建dashboard-configmap.yaml资源
kubectl create -f dashboard-configmap.yaml
kubectl get Configmap -n kube-system
------------------------------------------------------------------------
#dashboard-controller.yaml 控制器文件
vim dashboard-controller.yaml
apiVersion: v1
kind: ServiceAccount			#控制器名称（服务访问）
metadata:
  labels:
    k8s-app: kubernetes-dashboard
    addonmanager.kubernetes.io/mode: Reconcile
  name: kubernetes-dashboard
  namespace: kube-system
---
apiVersion: apps/v1
kind: Deployment			#控制器名称
metadata:
  name: kubernetes-dashboard
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  selector:
    matchLabels:
      k8s-app: kubernetes-dashboard
  template:
    metadata:
      labels:
        k8s-app: kubernetes-dashboard
      annotations:
        scheduler.alpha.kubernetes.io/critical-pod: ''
        seccomp.security.alpha.kubernetes.io/pod: 'docker/default'
    spec:
      priorityClassName: system-cluster-critical			
      containers:			#资源指定的名称、镜像
      - name: kubernetes-dashboard
        image: siriuszg/kubernetes-dashboard-amd64:v1.8.3
        resources:			#设置了CPU和内存的上限
          limits:
            cpu: 100m
            memory: 300Mi
          requests:
            cpu: 50m
            memory: 100Mi
        ports:
        - containerPort: 8443	#8443提供对外的端口号（HTTPS协议）
          protocol: TCP
        args:
          # PLATFORM-SPECIFIC ARGS HERE
          - --auto-generate-certificates
        volumeMounts:			#容器卷
        - name: kubernetes-dashboard-certs
          mountPath: /certs
        - name: tmp-volume
          mountPath: /tmp
        livenessProbe:
          httpGet:
            scheme: HTTPS
            path: /
            port: 8443
          initialDelaySeconds: 30
          timeoutSeconds: 30
      volumes:
      - name: kubernetes-dashboard-certs
        secret:
          secretName: kubernetes-dashboard-certs
      - name: tmp-volume
        emptyDir: {}
      serviceAccountName: kubernetes-dashboard
      tolerations:
      - key: "CriticalAddonsOnly"
        operator: "Exists"

#创建 dashboard-controller.yaml 资源
kubectl create -f dashboard-controller.yaml
kubectl get ServiceAccount -n kube-system
kubectl get deployment -n kube-system
------------------------------------------------------------------------
#dashboard-service.yaml 服务
vim dashboard-service.yaml 
apiVersion: v1
kind: Service				#控制器名称
metadata:
  name: kubernetes-dashboard
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  type: NodePort			#提供的形式（访问node节点提供出来的端口，即nodeport
  selector:
    k8s-app: kubernetes-dashboard
  ports:
  - port: 443				#内部提供
    targetPort: 8443			#Pod内部端口
    nodePort: 30001			#节点对外提供的端口（映射端口）

#创建dashboard-service.yaml资源
kubectl create -f dashboard-service.yaml 
kubectl get service -n kube-system
------------------------------------------------------------------------
#查看pod资源
kubectl get pods,svc -n kube-system

#查看资源分配的位置
kubectl get pods -n kube-system -o wide

#查看此pod资源的日志
kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=system:anonymous
clusterrolebinding.rbac.authorization.k8s.io/cluster-system-anonymous created
kubectl logs kubernetes-dashboard-65f974f565-bh5zh -n kube-system

二、证书自签

vim dashboard-cert.sh
cat > dashboard-csr.json <<EOF	#创建json格式的csr签名文件
{
   "CN": "Dashboard",
   "hosts": [],
   "key": {
       "algo": "rsa",
       "size": 2048
   },
   "names": [
       {
           "C": "CN",
           "L": "BeiJing",
           "ST": "BeiJing"
       }
   ]
}
EOF

K8S_CA=$1
#以下产生CA证书
cfssl gencert -ca=$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

#删除原本的证书凭据
kubectl delete secret kubernetes-dashboard-certs -n kube-system
#重新创建一个证书凭据
kubectl create secret generic kubernetes-dashboard-certs --from-file=./ -n kube-system
------》wq

#生成证书
bash dashboard-cert.sh /root/k8s/k8s-cert/

#编辑dashboard-controller.yaml，指向证书位置，完成证书自签
vim dashboard-controller.yaml 
----47行左右添加/修改
        args:
          # PLATFORM-SPECIFIC ARGS HERE
          - --auto-generate-certificates
          - --tls-key-file=dashboard-key.pem
          - --tls-cert-file=dashboard.pem

#重新部署
kubectl apply -f dashboard-controller.yaml

#需要注意一个问题，在重新部署的时候，资源可能会分配到其他节点，再次查看pod资源位置
kubectl get pods -n kube-system -o wide

#生成令牌 k8s-admin.yaml
vim k8s-admin.yaml 
apiVersion: v1
kind: ServiceAccount
metadata:
  name: dashboard-admin		#创建dashboard-admin的资源，相当于一个管理员账户
  namespace: kube-system
---
kind: ClusterRoleBinding	#绑定群集用户角色
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: dashboard-admin		#群集用户角色其实就是管理员的身份
subjects:
  - kind: ServiceAccount
    name: dashboard-admin
    namespace: kube-system
roleRef:
  kind: ClusterRole
  name: cluster-admin
  apiGroup: rbac.authorization.k8s.io
 
#先查看secret(安全角色)的命名空间中的资源
kubectl get secret -n kube-system

#生成令牌
kubectl create -f k8s-admin.yaml 

#再次查看secret资源
kubectl get secret -n kube-system

#详细查看令牌信息
kubectl describe secret dashboard-admin-token-dpjdk -n kube-system
（最下方为token令牌，进行复制，登录web控制台需要使用）