免登录只读访问 kubernetes dashboard

配置

基于 v2.7.0 的配置文件,修改了 ClusterRoleClusterRoleBinding,使得 dashboard 只能以只读的方式访问 kubernetes 集群。

首先需要修改 dashboard 启动 args,移除 --auto-generate-certificates,添加 --enable-insecure-login--enable-skip-login

然后修改 Service 端口为 9090,并修改 Deployment 健康检查,根据权限修改 ClusterRole

最后通过访问 kubernetes-dashboard.kubernetes-dashboard.svc.cluster.local:9090 即可。

完整配置

注意:以下配置中禁用了对 secret 的访问权限

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apiVersion: v1
kind: Namespace
metadata:
name: kubernetes-dashboard

---

apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard

---

apiVersion: v1
kind: Service
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
spec:
ports:
- port: 9090
targetPort: 9090
selector:
k8s-app: kubernetes-dashboard

---

apiVersion: v1
kind: Secret
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard-certs
namespace: kubernetes-dashboard
type: Opaque

---

apiVersion: v1
kind: Secret
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard-csrf
namespace: kubernetes-dashboard
type: Opaque
data:
csrf: ""

---

apiVersion: v1
kind: Secret
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard-key-holder
namespace: kubernetes-dashboard
type: Opaque

---

apiVersion: v1
kind: ConfigMap
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard-settings
namespace: kubernetes-dashboard

---

apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
rules:
- apiGroups: [""]
resources: ["secrets"]
resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs", "kubernetes-dashboard-csrf"]
verbs: ["get", "update", "delete"]
- apiGroups: [""]
resources: ["configmaps"]
resourceNames: ["kubernetes-dashboard-settings"]
verbs: ["get", "update"]
- apiGroups: [""]
resources: ["services"]
resourceNames: ["heapster", "dashboard-metrics-scraper"]
verbs: ["proxy"]
- apiGroups: [""]
resources: ["services/proxy"]
resourceNames: ["heapster", "http:heapster:", "https:heapster:", "dashboard-metrics-scraper", "http:dashboard-metrics-scraper"]
verbs: ["get"]

---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
rules:
- apiGroups: [""]
resources: ["configmaps", "endpoints", "persistentvolumes", "persistentvolumeclaims", "persistentvolumeclaims/status", "pods", "replicationcontrollers", "replicationcontrollers/scale", "serviceaccounts", "services", "services/status"]
verbs: ["get", "list", "watch"]
- apiGroups: [""]
resources: ["bindings", "events", "limitranges", "namespaces/status", "pods/log", "pods/status", "replicationcontrollers/status", "resourcequotas", "resourcequotas/status"]
verbs: ["get", "list", "watch"]
- apiGroups: [""]
resources: ["namespaces", "nodes"]
verbs: ["get", "list", "watch"]
- apiGroups: ["apps"]
resources: ["daemonsets", "daemonsets/status", "deployments", "deployments/scale", "deployments/status", "replicasets", "replicasets/scale", "replicasets/status", "statefulsets", "statefulsets/scale", "statefulsets/status"]
verbs: ["get", "list", "watch"]
- apiGroups: ["autoscaling"]
resources: ["horizontalpodautoscalers", "horizontalpodautoscalers/status"]
verbs: ["get", "list", "watch"]
- apiGroups: ["batch"]
resources: ["cronjobs", "cronjobs/status", "jobs", "jobs/status"]
verbs: ["get", "list", "watch"]
- apiGroups: ["extensions"]
resources: ["daemonsets", "daemonsets/status", "deployments", "deployments/scale", "deployments/status", "ingresses", "ingresses/status", "networkpolicies", "replicasets", "replicasets/scale", "replicasets/status", "replicationcontrollers/scale"]
verbs: ["get", "list", "watch"]
- apiGroups: ["policy"]
resources: ["poddisruptionbudgets", "poddisruptionbudgets/status"]
verbs: ["get", "list", "watch"]
- apiGroups: ["networking.k8s.io"]
resources: ["networkpolicies", "ingresses", "ingresses/status", "ingressclasses"]
verbs: ["get", "list", "watch"]
- apiGroups: ["storage.k8s.io"]
resources: ["storageclasses", "volumeattachments"]
verbs: ["get", "list", "watch"]
- apiGroups: ["metrics.k8s.io"]
resources: ["pods", "nodes"]
verbs: ["get", "list", "watch"]
- apiGroups: ["rbac.authorization.k8s.io"]
resources: ["clusterrolebindings", "clusterroles", "roles", "rolebindings"]
verbs: ["get", "list", "watch"]
- apiGroups: ["apiextensions.k8s.io"]
resources: ["customresourcedefinitions"]
verbs: ["get", "list", "watch"]
- apiGroups: ["networking.istio.io"]
resources: ["gateways", "envoyfilters", "virtualservices"]
verbs: ["get", "list", "watch"]

---

apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: kubernetes-dashboard
subjects:
- kind: ServiceAccount
name: kubernetes-dashboard
namespace: kubernetes-dashboard

---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: kubernetes-dashboard
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: kubernetes-dashboard
subjects:
- kind: ServiceAccount
name: kubernetes-dashboard
namespace: kubernetes-dashboard

---

apiVersion: apps/v1
kind: Deployment
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
spec:
replicas: 1
revisionHistoryLimit: 10
selector:
matchLabels:
k8s-app: kubernetes-dashboard
template:
metadata:
labels:
k8s-app: kubernetes-dashboard
spec:
securityContext:
seccompProfile:
type: RuntimeDefault
containers:
- name: kubernetes-dashboard
image: kubernetesui/dashboard:v2.7.0
imagePullPolicy: Always
ports:
- containerPort: 9090
protocol: TCP
args:
- --namespace=kubernetes-dashboard
- --enable-insecure-login
- --enable-skip-login
volumeMounts:
- name: kubernetes-dashboard-certs
mountPath: /certs
- mountPath: /tmp
name: tmp-volume
livenessProbe:
httpGet:
scheme: HTTP
path: /
port: 9090
initialDelaySeconds: 30
timeoutSeconds: 30
securityContext:
allowPrivilegeEscalation: false
readOnlyRootFilesystem: true
runAsUser: 1001
runAsGroup: 2001
volumes:
- name: kubernetes-dashboard-certs
secret:
secretName: kubernetes-dashboard-certs
- name: tmp-volume
emptyDir: {}
serviceAccountName: kubernetes-dashboard
nodeSelector:
"kubernetes.io/os": linux
tolerations:
- key: node-role.kubernetes.io/master
effect: NoSchedule

---

apiVersion: v1
kind: Service
metadata:
labels:
k8s-app: dashboard-metrics-scraper
name: dashboard-metrics-scraper
namespace: kubernetes-dashboard
spec:
ports:
- port: 8000
targetPort: 8000
selector:
k8s-app: dashboard-metrics-scraper

---

apiVersion: apps/v1
kind: Deployment
metadata:
labels:
k8s-app: dashboard-metrics-scraper
name: dashboard-metrics-scraper
namespace: kubernetes-dashboard
spec:
replicas: 1
revisionHistoryLimit: 10
selector:
matchLabels:
k8s-app: dashboard-metrics-scraper
template:
metadata:
labels:
k8s-app: dashboard-metrics-scraper
spec:
securityContext:
seccompProfile:
type: RuntimeDefault
containers:
- name: dashboard-metrics-scraper
image: kubernetesui/metrics-scraper:v1.0.8
ports:
- containerPort: 8000
protocol: TCP
livenessProbe:
httpGet:
scheme: HTTP
path: /
port: 8000
initialDelaySeconds: 30
timeoutSeconds: 30
volumeMounts:
- mountPath: /tmp
name: tmp-volume
securityContext:
allowPrivilegeEscalation: false
readOnlyRootFilesystem: true
runAsUser: 1001
runAsGroup: 2001
serviceAccountName: kubernetes-dashboard
nodeSelector:
"kubernetes.io/os": linux
tolerations:
- key: node-role.kubernetes.io/master
effect: NoSchedule
volumes:
- name: tmp-volume
emptyDir: {}

Ref

  • https://github.com/kubernetes/dashboard/tree/v2.7.0
  • https://github.com/kubernetes/dashboard/blob/v2.7.0/docs/common/dashboard-arguments.md
  • https://gist.github.com/karthik101/201374aee2ebea25ddf6c723858568be