:ACK events

Usage notes

ACK events are from the following two event sources:

• Application Real-Time Monitoring Service (ARMS)
  • You must install the ARMS Prometheus component in Kubernetes clusters. For more information, see Enable Prometheus Service.
  • These events are of the cs:k8s:K8s-event-via-arms type and are not classified into specific types.
• Node Problem Detector (NPD)
  • You must install the ack-node-problem-detector component in Kubernetes clusters and configure EventBridge as a sink. For more information, see Install the NPD component.
  • These events are classified by resource type. For example, events of the cs:k8s:PodRelatedEvent type are events related to pods.

Events

The following table describes the ACK events that can be published to EventBridge.

For more information about the parameters defined in the CloudEvents specification, see Overview.

ACK events collected by ARMS

The following sample code shows an ACK event collected by ARMS and received by EventBridge:

{
    "id":"4cf9678d-dfec-4d6e-9fd1-a9a2d205****",
    "source":"acs.cs",
    "time":"2020-11-19T21:04:41+08:00",
    "data":{
        "reason":"FailedCreatePodSandBox",
        "involvedObject":{
            "uid":"e0a7e4b6-5331-487f-bb0a-e69647a9****",
            "apiVersion":"v1",
            "kind":"Pod",
            "resourceVersion":"40326010",
            "namespace":"kube-system",
            "name":"alicloud-application-controller-798784bf49-v88hc"
        },
        "count":1,
        "source":{
            "component":"kubelet",
            "host":"cn-hangzhou.192.168.XX.XX"
        },
        "message":"Failed to create pod sandbox",
        "type":"Warning",
        "firstTimestamp":"2020-11-19T21:04:41Z",
        "lastTimestamp":"2020-11-19T21:04:41Z"
    },
    "specversion":"1.0",
    "datacontenttype":"application/json",
    "type":"cs:k8s:K8s-event-via-arms",
    "aliyunaccountid":"123456789098****",
    "aliyuneventbusname":"default",
    "aliyunpublishtime":"2020-11-19T21:04:42Z",
    "aliyunregionid":"cn-hangzhou",
    "aliyunpublishaddr":"172.25.XX.XX"
}

The following table describes the parameters in the data field.

ACK event related to a pod

The following sample code shows an ACK event related to a pod and received by EventBridge:

{
    "datacontenttype":"application/json",
    "aliyunaccountid":"123456789098****",
    "data":{
        "reason":"BackOff",
        "metadata":{
            "uid":"0a2d6413-ea4a-414b-a813-aa9b6a17****",
            "resourceVersion":"1163710",
            "creationTimestamp":"2021-01-08T07:11:52Z",
            "name":"oom-test",
            "namespace":"default"
        },
        "involvedObject":{
            "uid":"3438fea9-1e54-4f71-aec5-6e874136****",
            "apiVersion":"v1",
            "kind":"Pod",
            "resourceVersion":"425592514",
            "name":"oom-test-85b",
            "namespace":"default"
        },
        "reportingInstance":"",
        "count":197,
        "source":{
            "component":"kubelet",
            "host":"cn-hangzhou.172.16.XX.XX"
        },
        "message":"Back-off restarting failed container",
        "type":"Warning",
        "reportingComponent":"",
        "firstTimestamp":"2021-01-08T07:11:52Z",
        "lastTimestamp":"2021-01-08T07:56:41Z"
    },
    "subject":"acs:cs:cn-hangzhou:123456789098****:abc/apis/v1/namespaces/default/pods/oom-test-85b",
    "source":"acs.cs",
    "type":"cs:k8s:PodRelatedEvent",
    "aliyunpublishtime":"2021-01-18T09:43:58.785Z",
    "specversion":"1.0",
    "aliyuneventbusname":"default",
    "id":"af182bae-16b8-4327-bb3a-a972de72****",
    "time":"2021-01-08T15:57:00+08:00",
    "aliyunregionid":"cn-hangzhou",
    "aliyunpublishaddr":"172.25.XX.XX"
}

The following table describes the parameters in the data field.

Install the NPD component

1. Log on to the ACK console.
2. In the left-side navigation pane, choose Marketplace > Marketplace.
3. On the Marketplace page, click the App Catalog tab. In the search box, enter ack-node-problem-detector and click the icon.
4. Click the ack-node-problem-detector card. On the component details page, click Deploy.
5. In the Deploy panel, set the parameters and click OK.
   • In the Basic Information step, select a cluster and a namespace, and then click Next.
   • In the Parameters step, change the value of enabled to true for eventbridge in the Sink parameter in the code editor.