Prometheus operator添加报警规则及通知方式

青旅半醒 2022-11-28 13:39 315阅读 0赞

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# 配置报警 #

修改/root/kube-prometheus/manifests/alertmanager-service.yaml添加 type: NodePort，方便浏览器访问alertmanager页面  
kubectl get svc -n monitoring可以看到alertmanager地址端口信息 http://172.16.0.6:31568/\#/status  
在alertmanager的status页面可以查看到AlertManager的配置信息

Config
    global:
      resolve_timeout: 5m
      http_config: {}
      smtp_from: yunwei@hhotel.com
      smtp_hello: hhotel.com
      smtp_smarthost: smtp.qiye.aliyun.com:465
      smtp_auth_username: yunwei@hhotel.com
      smtp_auth_password: <secret>
      smtp_require_tls: true
      pagerduty_url: https://events.pagerduty.com/v2/enqueue
      hipchat_api_url: https://api.hipchat.com/
      opsgenie_api_url: https://api.opsgenie.com/
      wechat_api_url: https://qyapi.weixin.qq.com/cgi-bin/
      victorops_api_url: https://alert.victorops.com/integrations/generic/20131114/alert/
    route:
    ... ...

这些信息实际来自于/root/kube-prometheus/manifests/alertmanager-secret.yaml文件，名为alertmanager-main的secret

apiVersion: v1
    data:
      alertmanager.yaml: Imdsb2JhbCI6IAogICJyZXNvbHZlX3RpbWVvdXQiOiAiNW0iCiJyZWNlaXZlcnMiOiAKLSAibmFtZSI6ICJudWxsIgoicm91dGUiOiAKICAiZ3JvdXBfYnkiOiAKICAtICJqb2IiCiAgImdyb3VwX2ludGVydmFsIjogIjVtIgogICJncm91cF93YWl0IjogIjMwcyIKICAicmVjZWl2ZXIiOiAibnVsbCIKICAicmVwZWF0X2ludGVydmFsIjogIjEyaCIKICAicm91dGVzIjogCiAgLSAibWF0Y2giOiAKICAgICAgImFsZXJ0bmFtZSI6ICJEZWFkTWFuc1N3aXRjaCIKICAgICJyZWNlaXZlciI6ICJudWxsIg==
    kind: Secret
    metadata:
      name: alertmanager-main
      namespace: monitoring
    type: Opaque

可以将alertmanager.yaml对应的value值做一个base64解码：

echo Imdsb2JhbCI6IAogICJyZXNvbHZlX3RpbWVvdXQiOiAiNW0iCiJyZWNlaXZlcnMiOiAKLSAibmFtZSI6ICJudWxsIgoicm91dGUiOiAKICAiZ3JvdXBfYnkiOiAKICAtICJqb2IiCiAgImdyb3VwX2ludGVydmFsIjogIjVtIgogICJncm91cF93YWl0IjogIjMwcyIKICAicmVjZWl2ZXIiOiAibnVsbCIKICAicmVwZWF0X2ludGVydmFsIjogIjEyaCIKICAicm91dGVzIjogCiAgLSAibWF0Y2giOiAKICAgICAgImFsZXJ0bmFtZSI6ICJEZWFkTWFuc1N3aXRjaCIKICAgICJyZWNlaXZlciI6ICJudWxsIg== | base64 -d

我们如果想自定义接收器或者模板消息，可以重新生成这个名为alertmanager-main的secret  
vi alertmanager.yaml

global:
      resolve_timeout: 5m
      smtp_smarthost: 'smtp.qiye.aliyun.com:465'
      smtp_from: 'yunwei@hhotel.com'
      smtp_auth_username: 'yunwei@hhotel.com'
      smtp_auth_password: 'aRXjq9W1jto^7^Zb'
      smtp_hello: 'hhotel.com'
      smtp_require_tls: true
    templates:
      - "*.tmpl"
    route:
      group_by: ['job', 'severity']
      group_wait: 30s
      group_interval: 5m
      repeat_interval: 5m
      receiver: 'wechat'
      routes:
      - receiver: 'wechat'
        group_wait: 10s
        match:
          alertname: EtcdClusterUnavailable
    receivers:
    - name: 'default'
      email_configs:
      - to: 'yunwei@hhotel.com'
        send_resolved: true
    - name: 'wechat'
      wechat_configs:
      - corp_id: 'wx02f71fb3dea46c16'
        to_party: '1'
        to_user: "renzhenxin"
        agent_id: '1'
        api_secret: 'r4OGerF_p4UrIN6QERCefJRxzpI0SquNG5gHCxGxcOM'
        send_resolved: true
    inhibit_rules:
      - source_match:
          severity: 'critical'
        target_match:
          severity: 'warning'
        equal: ['alertname', 'dev', 'instance']

创建wechat报警模板 wechat.tmpl

{
        { define "wechat.default.message" }}
    {
        { range .Alerts }}
    ========start==========
    触发时间: {
        { .StartsAt.Format "2006-01-02 15:04:05" }}
    告警程序: prometheus_alert
    告警级别: {
        { .Labels.severity }}
    告警类型: {
        { .Labels.alertname }}
    故障主机: {
        { .Labels.instance }}
    告警主题: {
        { .Annotations.summary }}
    告警详情: {
        { .Annotations.description }}
    ========end==========
    {
        { end }}
    {
        { end }}

删除原来的secret，然后再创建

kubectl delete secret alertmanager-main -n monitoring
    kubectl create secret generic alertmanager-main --from-file=alertmanager.yaml --from-file=wechat.tmpl -n monitoring

查看alertmanegr微信报警模板

kubectl exec -it alertmanager-main-0 /bin/sh -n monitoring
    ls /etc/alertmanager/config
    cat /etc/alertmanager/config/wechat.tmpl

查看alertmanager的status页面config会显示修改变化

# 配置自动服务发现 #

想要让Prometheus Operator去自动发现并监控具有prometheus.io/scrape=true这个annotations的Service，需要对prometheus添加一个额外配置，相应的，Service要在annotation区域添加prometheus.io/scrape=true的声明  
vi prometheus-additional.yaml

- job_name: 'kubernetes-service-endpoints'
      kubernetes_sd_configs:
      - role: endpoints
      relabel_configs:
      - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape]
        action: keep
        regex: true
      - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scheme]
        action: replace
        target_label: __scheme__
        regex: (https?)
      - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_path]
        action: replace
        target_label: __metrics_path__
        regex: (.+)
      - source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_port]
        action: replace
        target_label: __address__
        regex: ([^:]+)(?::\d+)?;(\d+)
        replacement: $1:$2
      - action: labelmap
        regex: __meta_kubernetes_service_label_(.+)
      - source_labels: [__meta_kubernetes_namespace]
        action: replace
        target_label: kubernetes_namespace
      - source_labels: [__meta_kubernetes_service_name]
        action: replace
        target_label: kubernetes_name

使用这个文件创建一个secret对象

kubectl create secret generic additional-configs --from-file=prometheus-additional.yaml -n monitoring
    kubectl get secret additional-configs -n monitoring -o yaml

在prometheus资源对象中加入刚才创建的额外配置，在spec下添加

additionalScrapeConfigs:
        name: additional-configs
        key: prometheus-additional.yaml

完整配置cat /root/kube-prometheus/manifests/prometheus-prometheus.yaml

apiVersion: monitoring.coreos.com/v1
    kind: Prometheus
    metadata:
      labels:
        prometheus: k8s
      name: k8s
      namespace: monitoring
    spec:
      alerting:
        alertmanagers:
        - name: alertmanager-main
          namespace: monitoring
          port: web
      baseImage: quay.io/prometheus/prometheus
      nodeSelector:
        kubernetes.io/os: linux
      podMonitorSelector: {}
      replicas: 2
      secrets:
      - etcd-certs
      resources:
        requests:
          memory: 400Mi
      ruleSelector:
        matchLabels:
          prometheus: k8s
          role: alert-rules
      securityContext:
        fsGroup: 2000
        runAsNonRoot: true
        runAsUser: 1000
      additionalScrapeConfigs:
        name: additional-configs
        key: prometheus-additional.yaml
      serviceAccountName: prometheus-k8s
      serviceMonitorNamespaceSelector: {}
      serviceMonitorSelector: {}
      version: v2.11.0

kubectl apply -f prometheus-prometheus.yaml

过一会儿到prometheus查看配置已经生效,搜索关键词kubernetes-service-endpoints

kubectl logs -f prometheus-k8s-0 prometheus -n monitoring

可以看到有很多错误日志出现，都是xxx is forbidden，这说明是 RBAC 权限的问题，通过 prometheus 资源对象的配置可以知道 Prometheus 绑定了一个名为 prometheus-k8s 的 ServiceAccount 对象，而这个对象绑定的是一个名为 prometheus-k8s 的 ClusterRole  
修改prometheus-clusterRole.yaml

apiVersion: rbac.authorization.k8s.io/v1
    kind: ClusterRole
    metadata:
      name: prometheus-k8s
    rules:
    - apiGroups:
      - ""
      resources:
      - nodes
      - services
      - endpoints
      - pods
      - nodes/proxy
      verbs:
      - get
      - list
      - watch
    - apiGroups:
      - ""
      resources:
      - configmaps
      - nodes/metrics
      verbs:
      - get
    - nonResourceURLs:
      - /metrics
      verbs:
      - get

kubectl apply -f prometheus-clusterRole.yaml

从prometheus的targets可以看到已经自动发现了端口9153的服务，这是kube-dns

[root@k8s03 manifests]# kubectl describe svc kube-dns -n kube-system
    Name:              kube-dns
    Namespace:         kube-system
    Labels:            k8s-app=kube-dns
                       kubernetes.io/cluster-service=true
                       kubernetes.io/name=KubeDNS
    Annotations:       prometheus.io/port: 9153
                       prometheus.io/scrape: true
    Selector:          k8s-app=kube-dns
    Type:              ClusterIP
    IP:                10.96.0.10
    Port:              dns  53/UDP
    TargetPort:        53/UDP
    Endpoints:         192.168.73.66:53,192.168.73.67:53
    Port:              dns-tcp  53/TCP
    TargetPort:        53/TCP
    Endpoints:         192.168.73.66:53,192.168.73.67:53
    Port:              metrics  9153/TCP
    TargetPort:        9153/TCP
    Endpoints:         192.168.73.66:9153,192.168.73.67:9153
    Session Affinity:  None
    Events:            <none>

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[jenkins_kubernetes_harbor_gitlab_devops]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb638d2fcc14043990967471ba8a2aaf389ab483594fd81395b5afda1c23a9eff4371df6bca4&idx=1&mid=2247483962&scene=21&sn=595eac335f7fb523bbb60cbbede109ca#wechat_redirect
[kubernetes_-flannel]: http://mp.weixin.qq.com/s?__biz=MzIzOTQ3NDg1Mw%3D%3D&chksm=e928c005de5f4913b3e81d32cf98dc4f237be04b0c19e02f615650538a9aa0aabdc025604918&idx=1&mid=2247483855&scene=21&sn=26587a359cca53d129ab7e8a7fa394e0#wechat_redirect
[kubernetes_-calico]: http://mp.weixin.qq.com/s?__biz=MzIzOTQ3NDg1Mw%3D%3D&chksm=e928c073de5f49658fdaed40affb1a9ea3f059e7df3cc90ae24b194a8698a7f73089d3964cab&idx=1&mid=2247483833&scene=21&sn=c00c2b69db7d06eacaf6206805d2955a#wechat_redirect
[kubernetes 1]: http://mp.weixin.qq.com/s?__biz=MzIzOTQ3NDg1Mw%3D%3D&chksm=e928c05fde5f494917570591168d9e71f507c2d124312c51dfdb6cfb30eb03eb48b73a3e0d9b&idx=1&mid=2247483797&scene=21&sn=bc208ee075c41b81ffabaefe509538ba#wechat_redirect
[k8s 1]: http://mp.weixin.qq.com/s?__biz=MzIzOTQ3NDg1Mw%3D%3D&chksm=e928c0b4de5f49a2eef8cc91afa81095b71eb093e94dce6eddbc7059583e819b1ac51c596ebb&idx=1&mid=2247483774&scene=21&sn=dfc3babde045fe99da9fa168cc9f0595#wechat_redirect
[-]: http://mp.weixin.qq.com/s?__biz=MzIzOTQ3NDg1Mw%3D%3D&chksm=e928c0bfde5f49a9990c672e4434f5ae7b74004dc1982cc44801c524b58067d9b245e5ba5b71&idx=1&mid=2247483765&scene=21&sn=b8444e82a93535425349b509ded4e4b6#wechat_redirect
[Prometheus_MySQL]: http://mp.weixin.qq.com/s?__biz=MzIzOTQ3NDg1Mw%3D%3D&chksm=e928c0aade5f49bc7df29ecb2280ab9e1a8aa905b31e36856bf8dc19b05ef60c5e7be0333b88&idx=1&mid=2247483744&scene=21&sn=1035d73f8cf39caf8534766435497590#wechat_redirect
[Prometheus_Nginx]: http://mp.weixin.qq.com/s?__biz=MzIzOTQ3NDg1Mw%3D%3D&chksm=e928c095de5f4983c249b1b556fa6f8f60a0bb6991d2872079a9d5c28ce2ee17b8fc407eeb2c&idx=1&mid=2247483743&scene=21&sn=3ad15cd693685479dc7bf5dd628796d2#wechat_redirect
[Prometheus_Tomcat]: http://mp.weixin.qq.com/s?__biz=MzIzOTQ3NDg1Mw%3D%3D&chksm=e928c086de5f499011eb542c6da8ead32b538c0bf06340ebe56ad439e2649e0b63efbcb4a611&idx=1&mid=2247483724&scene=21&sn=dd390f05270c6ac7a9c2b51fdc22f0ee#wechat_redirect
[linux 1]: http://mp.weixin.qq.com/s?__biz=MzIzOTQ3NDg1Mw%3D%3D&chksm=e928c0dede5f49c878898e04329f08d8adf554397476283aaa3f2554f71a8bf20986755fbcc9&idx=1&mid=2247483668&scene=21&sn=a7d0768b7eb034ef2e2f23e25b1b1845#wechat_redirect
[storageclass_pv]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb638837cc140121578456f6a5d679ae481421f2f3f1d5099bb7f2c56d00174fe61b2016061d&idx=1&mid=2247485218&scene=21&sn=ba698d444a029a2659091bfd81133697#wechat_redirect
[k8s_yaml_gitlab]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb638814cc1401028c7ab321d2ac6579f5c6d2b029fadc5687874e41470bf95aa09c01c33d45&idx=1&mid=2247485185&scene=21&sn=2b5646119a008d69948c5a84d3724c95#wechat_redirect
[helm_-_helm_k8s]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb638bbbcc1402ad16d4b65b3db26cbd324c85819934077caa41969f0c9d573b71b21e2c51ff&idx=1&mid=2247484590&scene=21&sn=2c23098269c5df1e793aa47198a7b1e6#wechat_redirect
[k8s_Ingress-nginx]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb6385fdcc140ceb4a5cf902d24499ce3480f91aa97e0e0c7a1fb12a466865ff2f8dedc8be0c&idx=1&mid=2247486184&scene=21&sn=cccb2bc67ca74a01be7b4f79e05f8bec#wechat_redirect
[k8s_Pod]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb6385c3cc140cd57c41dcdd267f2bc0f0f6476d3a56e1fa88b23a7ad3f82799bad72cbdde93&idx=1&mid=2247486166&scene=21&sn=a40899007709d1a1f3e7b5be79ed6e49#wechat_redirect
[Prometheus Operator-_-]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb638626cc140f30c8d35e45239e6b559f7369b8c58bacd157a24e7b62313c826baec75f299f&idx=2&mid=2247485747&scene=21&sn=3da14a91d75f745b26c3aa8d10361d23#wechat_redirect
[Prometheus Operator-_]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb63865bcc140f4d8966d1c3745c8f69c6384337c43a1a8eda6e1ae488bd78f08e44c9553b19&idx=1&mid=2247485774&scene=21&sn=1b0301dadc4b737e19b1066219813db7#wechat_redirect
[kubeconfig_k8s_dashboard ui]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb638679cc140f6f4e024f2e7739b995fc235b6f4e97983a583bc9c7e82da88cf0fbf8736fe7&idx=1&mid=2247485804&scene=21&sn=c157f0596f130bd97ec745b278546c50#wechat_redirect
[token_k8s dashboard ui]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb638687cc140f918f04ca60ed188da26cd3ab37a79e6fdbf64531efd11ae60dac0a77788f7c&idx=2&mid=2247485842&scene=21&sn=163174142218e8dca3bb9a94ed173694#wechat_redirect
[kubernetes_etcd]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb63853bcc140c2d4c4da1b59a4865c193383392d92075cee80530866892d8a2a365e2b4e565&idx=1&mid=2247485998&scene=21&sn=9889882d1820ac005e5512eccb67c0f1#wechat_redirect
[Linux]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb638538cc140c2e581b8c673a9c529359042a2262ec112f8c3476c7408f25e04856f0b37bbd&idx=2&mid=2247485997&scene=21&sn=ac694beaf60cbf18d133eb6ebbc7a345#wechat_redirect
[kubernetes_EFK]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb63851fcc140c09d17fe6e270524da6c3ec3c5f3969f6f4f61a54c54724168801d93b2cda9d&idx=1&mid=2247485962&scene=21&sn=87dfde054f2ff489a1ffd28dfe02a435#wechat_redirect
[prometheus operator_k8s_haproxy]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb6386f0cc140fe6dea923cb07c2164db1c894c87d8c85d828aa269cdf4ae2d92eeb201adb67&idx=1&mid=2247485925&scene=21&sn=5ae9bc969963775e347c3a1f279d541c#wechat_redirect
[kubernetes ConfigMap]: http://mp.weixin.qq.com/s?__biz=MzU0NjEwMTg4Mg%3D%3D&chksm=fb63853acc140c2ca1dc3ca813b133ca7158c34df5cfe59cebf7621851ead91490eaabc74a1b&idx=1&mid=2247485999&scene=21&sn=f6b03745426149e498a8c7065b060e24#wechat_redirect
[format_png]: /images/20221124/e4e05bd8917b4c47b7b8d9062149f689.png
[format_png 1]: /images/20221124/dbd8f28c4dd34b8996593994b3987129.png