5.8.2. 使用 Knative CLI 创建 API 服务器源

1. 以 YAML 文件形式,为事件源创建服务帐户、角色和角色绑定：

   apiVersion: v1
   kind: ServiceAccount
   metadata:
     name: events-sa
     namespace: default 

   1

   
   
   ---
   apiVersion: rbac.authorization.k8s.io/v1
   kind: Role
   metadata:
     name: event-watcher
     namespace: default 

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   rules:
     - apiGroups:
         - ""
       resources:
         - events
       verbs:
         - get
         - list
         - watch
   
   ---
   apiVersion: rbac.authorization.k8s.io/v1
   kind: RoleBinding
   metadata:
     name: k8s-ra-event-watcher
     namespace: default 

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   roleRef:
     apiGroup: rbac.authorization.k8s.io
     kind: Role
     name: event-watcher
   subjects:
     - kind: ServiceAccount
       name: events-sa
       namespace: default 

   4

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   1 2 3 4

   将这个命名空间更改为已选择安装事件源的命名空间。

2. 应用 YAML 文件：

   $ oc apply -f <filename>

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3. 创建具有事件 sink 的 API 服务器源。在以下示例中，sink 是一个代理：

   $ kn source apiserver create <event_source_name> --sink broker:<broker_name> --resource "event:v1" --service-account <service_account_name> --mode Resource

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4. 要检查 API 服务器源是否已正确设置，请创建一个 Knative 服务，在日志中转储传入的信息：

   $ kn service create <service_name> --image quay.io/openshift-knative/knative-eventing-sources-event-display:latest

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5. 如果您使用代理作为事件 sink，请创建一个触发器将事件从 default 代理过滤到服务：

   $ kn trigger create <trigger_name> --sink ksvc:<service_name>

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6. 通过在 default 命名空间中启动 pod 来创建事件：

   $ oc create deployment hello-node --image quay.io/openshift-knative/knative-eventing-sources-event-display:latest

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7. 通过检查以下命令生成的输出来检查是否正确映射了控制器：

   $ kn source apiserver describe <source_name>

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   输出示例

   Name:                mysource
   Namespace:           default
   Annotations:         sources.knative.dev/creator=developer, sources.knative.dev/lastModifier=developer
   Age:                 3m
   ServiceAccountName:  events-sa
   Mode:                Resource
   Sink:
     Name:       default
     Namespace:  default
     Kind:       Broker (eventing.knative.dev/v1)
   Resources:
     Kind:        event (v1)
     Controller:  false
   Conditions:
     OK TYPE                     AGE REASON
     ++ Ready                     3m
     ++ Deployed                  3m
     ++ SinkProvided              3m
     ++ SufficientPermissions     3m
     ++ EventTypesProvided        3m

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1. 获取 pod:

   $ oc get pods

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2. 查看 pod 的消息转储程序功能日志：

   $ oc logs $(oc get pod -o name | grep event-display) -c user-container

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   输出示例

   ☁️  cloudevents.Event
   Validation: valid
   Context Attributes,
     specversion: 1.0
     type: dev.knative.apiserver.resource.update
     datacontenttype: application/json
     ...
   Data,
     {
       "apiVersion": "v1",
       "involvedObject": {
         "apiVersion": "v1",
         "fieldPath": "spec.containers{hello-node}",
         "kind": "Pod",
         "name": "hello-node",
         "namespace": "default",
          .....
       },
       "kind": "Event",
       "message": "Started container",
       "metadata": {
         "name": "hello-node.159d7608e3a3572c",
         "namespace": "default",
         ....
       },
       "reason": "Started",
       ...
     }

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删除 API 服务器源

1. 删除触发器：

   $ kn trigger delete <trigger_name>

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2. 删除事件源：

   $ kn source apiserver delete <source_name>

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3. 删除服务帐户、集群角色和集群绑定：

   $ oc delete -f authentication.yaml

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