Kubernetes Events 绑定指南
详细介绍 Kubernetes Events 绑定组件的文档
组件格式
为了配置 Kubernetes Events 绑定,需要创建一个类型为 bindings.kubernetes
的组件。请参考本指南了解如何创建和应用绑定配置。
apiVersion: dapr.io/v1alpha1
kind: Component
metadata:
name: <NAME>
spec:
type: bindings.kubernetes
version: v1
metadata:
- name: namespace
value: "<NAMESPACE>"
- name: resyncPeriodInSec
value: "<seconds>"
- name: direction
value: "input"
元数据字段说明
字段 | 必需 | 绑定支持 | 详情 | 示例 |
---|---|---|---|---|
namespace |
是 | 输入 | 要读取事件的 Kubernetes 命名空间 | "default" |
resyncPeriodInSec |
否 | 输入 | 从 Kubernetes API 服务器刷新事件列表的时间间隔,默认为 "10" 秒 |
"15" |
direction |
否 | 输入 | 绑定的方向 | "input" |
kubeconfigPath |
否 | 输入 | kubeconfig 文件的路径。如果未指定,将使用默认的集群内配置 | "/path/to/kubeconfig" |
绑定支持
此组件支持输入绑定接口。
输出格式
从绑定接收到的输出格式为 bindings.ReadResponse
,其中 Data
字段包含以下结构:
{
"event": "",
"oldVal": {
"metadata": {
"name": "hello-node.162c2661c524d095",
"namespace": "kube-events",
"selfLink": "/api/v1/namespaces/kube-events/events/hello-node.162c2661c524d095",
...
},
"involvedObject": {
"kind": "Deployment",
"namespace": "kube-events",
...
},
"reason": "ScalingReplicaSet",
"message": "Scaled up replica set hello-node-7bf657c596 to 1",
...
},
"newVal": {
"metadata": { "creationTimestamp": "null" },
"involvedObject": {},
"source": {},
"firstTimestamp": "null",
"lastTimestamp": "null",
"eventTime": "null",
...
}
}
事件类型有三种:
- Add : 只有
newVal
字段有值,oldVal
字段为空的v1.Event
,event
为add
- Delete : 只有
oldVal
字段有值,newVal
字段为空的v1.Event
,event
为delete
- Update :
oldVal
和newVal
字段都有值,event
为update
所需权限
要从 Kubernetes 获取 events
,需要通过 Kubernetes 的 [RBAC 授权] 机制为用户/组/服务账户分配权限。
角色
需要以下形式的规则之一来授予 get, watch
和 list
events
的权限。API 组可以根据需要进行限制。
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
name: <ROLENAME>
rules:
- apiGroups: [""]
resources: ["events"]
verbs: ["get", "watch", "list"]
角色绑定
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: <NAME>
subjects:
- kind: ServiceAccount
name: default # 或根据需要更改
roleRef:
kind: Role
name: <ROLENAME> # 与上面相同
apiGroup: ""
相关链接
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