IoT?邊緣集群Kubernetes?Events告警通知進(jìn)一步配置詳解

更新時間：2023年02月17日 11:24:03 作者：東風(fēng)微鳴

這篇文章主要為大家介紹了IoT?邊緣集群Kubernetes?Events告警通知進(jìn)一步配置詳解，有需要的朋友可以借鑒參考下，希望能夠有所幫助，祝大家多多進(jìn)步，早日升職加薪

目標(biāo)

上一篇文章

IoT 邊緣集群基于 Kubernetes Events 的告警通知實現(xiàn)

告警恢復(fù)通知 - 經(jīng)過評估無法實現(xiàn)

原因: 告警和恢復(fù)是單獨完全不相關(guān)的事件, 告警是 Warning 級別, 恢復(fù)是 Normal 級別, 要開啟恢復(fù), 就會導(dǎo)致所有 Normal Events 都會被發(fā)送, 這個數(shù)量是很恐怖的; 而且, 除非特別有經(jīng)驗和耐心, 否則無法看出哪條 Normal 對應(yīng)的是告警的恢復(fù).

未恢復(fù)進(jìn)行持續(xù)告警 - 默認(rèn)就帶的能力, 無需額外配置.
告警內(nèi)容顯示資源名稱，比如節(jié)點和pod名稱

可以設(shè)置屏蔽特定的節(jié)點和工作負(fù)載并可以動態(tài)調(diào)整

比如，集群001中的節(jié)點worker-1做計劃性維護(hù)，期間停止監(jiān)控，維護(hù)完成后重新開始監(jiān)控。

配置

告警內(nèi)容顯示資源名稱

典型的幾類 events:

apiVersion: v1
count: 101557
eventTime: null
firstTimestamp: "2022-04-08T03:50:47Z"
involvedObject:
  apiVersion: v1
  fieldPath: spec.containers{prometheus}
  kind: Pod
  name: prometheus-rancher-monitoring-prometheus-0
  namespace: cattle-monitoring-system
kind: Event
lastTimestamp: "2022-04-14T11:39:19Z"
message: 'Readiness probe failed: Get "http://10.42.0.87:9090/-/ready": context deadline
  exceeded (Client.Timeout exceeded while awaiting headers)'
metadata:
  creationTimestamp: "2022-04-08T03:51:17Z"
  name: prometheus-rancher-monitoring-prometheus-0.16e3cf53f0793344
  namespace: cattle-monitoring-system
reason: Unhealthy
reportingComponent: ""
reportingInstance: ""
source:
  component: kubelet
  host: master-1
type: Warning

apiVersion: v1
count: 116
eventTime: null
firstTimestamp: "2022-04-13T02:43:26Z"
involvedObject:
  apiVersion: v1
  fieldPath: spec.containers{grafana}
  kind: Pod
  name: rancher-monitoring-grafana-57777cc795-2b2x5
  namespace: cattle-monitoring-system
kind: Event
lastTimestamp: "2022-04-14T11:18:56Z"
message: 'Readiness probe failed: Get "http://10.42.0.90:3000/api/health": context
  deadline exceeded (Client.Timeout exceeded while awaiting headers)'
metadata:
  creationTimestamp: "2022-04-14T11:18:57Z"
  name: rancher-monitoring-grafana-57777cc795-2b2x5.16e5548dd2523a13
  namespace: cattle-monitoring-system
reason: Unhealthy
reportingComponent: ""
reportingInstance: ""
source:
  component: kubelet
  host: master-1
type: Warning

apiVersion: v1
count: 20958
eventTime: null
firstTimestamp: "2022-04-11T10:34:51Z"
involvedObject:
  apiVersion: v1
  fieldPath: spec.containers{lb-port-1883}
  kind: Pod
  name: svclb-emqx-dt22t
  namespace: emqx
kind: Event
lastTimestamp: "2022-04-14T11:39:48Z"
message: Back-off restarting failed container
metadata:
  creationTimestamp: "2022-04-11T10:34:51Z"
  name: svclb-emqx-dt22t.16e4d11e2b9efd27
  namespace: emqx
reason: BackOff
reportingComponent: ""
reportingInstance: ""
source:
  component: kubelet
  host: worker-1
type: Warning

apiVersion: v1
count: 21069
eventTime: null
firstTimestamp: "2022-04-11T10:34:48Z"
involvedObject:
  apiVersion: v1
  fieldPath: spec.containers{lb-port-80}
  kind: Pod
  name: svclb-traefik-r5p8t
  namespace: kube-system
kind: Event
lastTimestamp: "2022-04-14T11:44:59Z"
message: Back-off restarting failed container
metadata:
  creationTimestamp: "2022-04-11T10:34:48Z"
  name: svclb-traefik-r5p8t.16e4d11daf0b79ce
  namespace: kube-system
reason: BackOff
reportingComponent: ""
reportingInstance: ""
source:
  component: kubelet
  host: worker-1
type: Warning

{
  "metadata": {
    "name": "event-exporter-79544df9f7-xj4t5.16e5c540dc32614f",
    "namespace": "monitoring",
    "uid": "baf2f642-2383-4e22-87e0-456b6c3eaf4e",
    "resourceVersion": "14043444",
    "creationTimestamp": "2022-04-14T13:08:40Z"
  },
  "reason": "Pulled",
  "message": "Container image \"ghcr.io/opsgenie/kubernetes-event-exporter:v0.11\" already present on machine",
  "source": {
    "component": "kubelet",
    "host": "worker-2"
  },
  "firstTimestamp": "2022-04-14T13:08:40Z",
  "lastTimestamp": "2022-04-14T13:08:40Z",
  "count": 1,
  "type": "Normal",
  "eventTime": null,
  "reportingComponent": "",
  "reportingInstance": "",
  "involvedObject": {
    "kind": "Pod",
    "namespace": "monitoring",
    "name": "event-exporter-79544df9f7-xj4t5",
    "uid": "b77d3e13-fa9e-484b-8a5a-d1afc9edec75",
    "apiVersion": "v1",
    "resourceVersion": "14043435",
    "fieldPath": "spec.containers{event-exporter}",
    "labels": {
      "app": "event-exporter",
      "pod-template-hash": "79544df9f7",
      "version": "v1"
    }
  }
}

我們可以把更多的字段加入到告警信息中, 其中就包括:

節(jié)點: {{ Source.Host }}
Pod: {{ .InvolvedObject.Name }}

綜上, 修改后的event-exporter-cfg yaml 如下:

apiVersion: v1
kind: ConfigMap
metadata:
  name: event-exporter-cfg
  namespace: monitoring
  resourceVersion: '5779968'
data:
  config.yaml: |
    logLevel: error
    logFormat: json
    route:
      routes:
        - match:
            - receiver: "dump"      
        - drop:
            - type: "Normal"
          match:
            - receiver: "feishu"                     
    receivers:
      - name: "dump"
        stdout: {}
      - name: "feishu"
        webhook:
          endpoint: "https://open.feishu.cn/open-apis/bot/v2/hook/..."
          headers:
            Content-Type: application/json
          layout:
            msg_type: interactive
            card:
              config:
                wide_screen_mode: true
                enable_forward: true
              header:
                title:
                  tag: plain_text
                  content: xxx測試K3S集群告警
                template: red
              elements:
                - tag: div
                  text: 
                    tag: lark_md
                    content: "**EventID:**  {{ .UID }}\n**EventNamespace:**  {{ .InvolvedObject.Namespace }}\n**EventName:**  {{ .InvolvedObject.Name }}\n**EventType:**  {{ .Type }}\n**EventKind:**  {{ .InvolvedObject.Kind }}\n**EventReason:**  {{ .Reason }}\n**EventTime:**  {{ .LastTimestamp }}\n**EventMessage:**  {{ .Message }}\n**EventComponent:**  {{ .Source.Component }}\n**EventHost:**  {{ .Source.Host }}\n**EventLabels:**  {{ toJson .InvolvedObject.Labels}}\n**EventAnnotations:**  {{ toJson .InvolvedObject.Annotations}}"

屏蔽特定的節(jié)點和工作負(fù)載

比如，集群001中的節(jié)點worker-1做計劃性維護(hù)，期間停止監(jiān)控，維護(hù)完成后重新開始監(jiān)控。

繼續(xù)修改event-exporter-cfg yaml 如下:

apiVersion: v1
kind: ConfigMap
metadata:
  name: event-exporter-cfg
  namespace: monitoring
data:
  config.yaml: |
    logLevel: error
    logFormat: json
    route:
      routes:
        - match:
            - receiver: "dump"      
        - drop:
            - type: "Normal"
            - source:
                host: "worker-1"
            - namespace: "cattle-monitoring-system"
            - name: "*emqx*"
            - kind: "Pod|Deployment|ReplicaSet"
            - labels:
                version: "dev"
          match:
            - receiver: "feishu"                     
    receivers:
      - name: "dump"
        stdout: {}
      - name: "feishu"
        webhook:
          endpoint: "https://open.feishu.cn/open-apis/bot/v2/hook/..."
          headers:
            Content-Type: application/json
          layout:
            msg_type: interactive
            card:
              config:
                wide_screen_mode: true
                enable_forward: true
              header:
                title:
                  tag: plain_text
                  content: xxx測試K3S集群告警
                template: red
              elements:
                - tag: div
                  text: 
                    tag: lark_md
                    content: "**EventID:**  {{ .UID }}\n**EventNamespace:**  {{ .InvolvedObject.Namespace }}\n**EventName:**  {{ .InvolvedObject.Name }}\n**EventType:**  {{ .Type }}\n**EventKind:**  {{ .InvolvedObject.Kind }}\n**EventReason:**  {{ .Reason }}\n**EventTime:**  {{ .LastTimestamp }}\n**EventMessage:**  {{ .Message }}\n**EventComponent:**  {{ .Source.Component }}\n**EventHost:**  {{ .Source.Host }}\n**EventLabels:**  {{ toJson .InvolvedObject.Labels}}\n**EventAnnotations:**  {{ toJson .InvolvedObject.Annotations}}"

默認(rèn)的 drop 規(guī)則為: - type: "Normal", 即不對 Normal 級別進(jìn)行告警;

現(xiàn)在加入以下規(guī)則:

            - source:
                host: "worker-1"
            - namespace: "cattle-monitoring-system"
            - name: "*emqx*"
            - kind: "Pod|Deployment|ReplicaSet"
            - labels:
                version: "dev"

... host: "worker-1": 不對節(jié)點worker-1 做告警;
... namespace: "cattle-monitoring-system": 不對 NameSpace: cattle-monitoring-system 做告警;
... name: "*emqx*": 不對 name(name 往往是 pod name) 包含 emqx 的做告警
kind: "Pod|Deployment|ReplicaSet": 不對 Pod Deployment ReplicaSet 做告警(也就是不關(guān)注應(yīng)用, 組件相關(guān)的告警)
...version: "dev": 不對 label 含有 version: "dev" 的做告警(可以通過它屏蔽特定的應(yīng)用的告警)