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k8s 建prometheus、alertmanager、prometheus-operator 教學

k8s prometheus alertmanager prometheus-operator 教學
yanchen 2021-05-31 23:28:06 ‧ 4227 瀏覽

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【YC的尋路青春】

大概要做的事情有這些

建一個自己的 - namespace

  • yc

蓋接線生 - prometheus-operator

  • ServiceAccount
  • ClusterRoleBinding
  • Deployment
  • Service

蓋alertmanager

  • ServiceAccount
  • Secret
  • Alertmanager
  • Service
  • Ingress

蓋prometheus

  • ServiceAccount
  • ClusterRole
  • ClusterRoleBinding
  • Prometheus
  • Service
  • Ingress

蓋serviceMonitor

  • Prometheus
  • Alertmanager
  • prometheus-operator

像是kinds: Prometheus、Alertmanager、serviceMonitor
我的寫法就是vi Prometheus.yaml
然後把要的內容複製貼上
然後:wq
你就可以在ls裡面看到你剛剛建立的yaml檔囉
然後
kubectl apply -f Prometheus.yaml
https://ithelp.ithome.com.tw/upload/images/20210601/20111603NyRCctNZrx.png
這張順序圖畫的很讚

參考來源 :　https://dbaplus.cn/news-134-3247-1.html

建一個自己的 - namespace

  • yc
kind: Namespace
apiVersion: v1
metadata:
  name: yc
spec:
  finalizers:
    - kubernetes

蓋接線生 - prometheus-operator

  • ServiceAccount
  • ClusterRoleBinding
  • Deployment
  • Service
apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/name: prometheus-operator
    app.kubernetes.io/version: v0.44.1
  name: prometheus-operator-yc
  namespace: yc

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/name: prometheus-operator
    app.kubernetes.io/version: v0.44.1
  name: prometheus-operator-yc
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: prometheus-operator
subjects:
- kind: ServiceAccount
  name: prometheus-operator
  namespace: yc

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/name: prometheus-operator
    app.kubernetes.io/version: v0.44.1
  name: prometheus-operator
  namespace: yc
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/component: controller
      app.kubernetes.io/name: prometheus-operator
  template:
    metadata:
      labels:
        app.kubernetes.io/component: controller
        app.kubernetes.io/name: prometheus-operator
        app.kubernetes.io/version: v0.44.1
    spec:
      containers:
      - args:
        - --kubelet-service=kube-system/kubelet
        - --prometheus-config-reloader=quay.io/prometheus-operator/prometheus-config-reloader:v0.44.1
        image: quay.io/prometheus-operator/prometheus-operator:v0.44.1
        name: prometheus-operator
        ports:
        - containerPort: 8080
          name: http
        resources:
          limits:
            cpu: 200m
            memory: 200Mi
          requests:
            cpu: 100m
            memory: 100Mi
        securityContext:
          allowPrivilegeEscalation: false
      - args:
        - --logtostderr
        - --secure-listen-address=:8443
        - --tls-cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305
        - --upstream=http://127.0.0.1:8080/
        image: quay.io/brancz/kube-rbac-proxy:v0.8.0
        name: kube-rbac-proxy
        ports:
        - containerPort: 8443
          name: https
        securityContext:
          runAsGroup: 65532
          runAsNonRoot: true
          runAsUser: 65532
      nodeSelector:
        beta.kubernetes.io/os: linux
      securityContext:
        runAsNonRoot: true
        runAsUser: 65534
      serviceAccountName: prometheus-operator-yc

apiVersion: v1
kind: Service
metadata:
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/name: prometheus-operator
    app.kubernetes.io/version: v0.44.1
  name: prometheus-operator
  namespace: yc
spec:
  clusterIP: None
  ports:
  - name: https
    port: 8443
    targetPort: https
  selector:
    app.kubernetes.io/component: controller
    app.kubernetes.io/name: prometheus-operator

蓋一個
ServiceAccount : prometheus-operator-yc
ClusterRoleBinding : prometheus-operator-yc
所以Deployment裡面有一行
serviceAccountName: prometheus-operator-yc

蓋alertmanager

  • ServiceAccount
  • Secret
  • Alertmanager
  • Service
  • Ingress
apiVersion: v1
kind: ServiceAccount
metadata:
  name: alertmanager-main
  namespace: yc

apiVersion: v1
kind: Secret
metadata:
  name: alertmanager-main
  namespace: yc
stringData:
  alertmanager.yaml: |-
    "global":
      "resolve_timeout": "5m"
      "slack_api_url": "https://hooks.slack.com/services/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"
    "receivers":
    - "name": "slack-notifications"
      "slack_configs":
      - "channel": "456"
    "route":
      "receiver": "slack-notifications"
      "repeat_interval": "12h"  
type: Opaque

apiVersion: monitoring.coreos.com/v1
kind: Alertmanager
metadata:
  labels:
    alertmanager: main
  name: main
  namespace: yc
spec:
  externalUrl: https://自己填/alertmanager-test-yc
  image: quay.io/prometheus/alertmanager:v0.21.0
  nodeSelector:
    kubernetes.io/os: linux
  replicas: 3
  securityContext:
    fsGroup: 2000
    runAsNonRoot: true
    runAsUser: 1000
  serviceAccountName: alertmanager-main
  version: v0.21.0

apiVersion: v1
kind: Service
metadata:
  labels:
    alertmanager: main
  name: alertmanager-main
  namespace: yc
spec:
  ports:
  - name: web
    port: 9093
    targetPort: web
  selector:
    alertmanager: main
    app: alertmanager
  sessionAffinity: ClientIP

kind: Ingress
apiVersion: networking.k8s.io/v1beta1
metadata:
  name: alertmanager
  namespace: yc
  annotations:
    appgw.ingress.kubernetes.io/backend-path-prefix: /
    appgw.ingress.kubernetes.io/connection-draining: 'true'
    appgw.ingress.kubernetes.io/connection-draining-timeout: '30'
    appgw.ingress.kubernetes.io/cookie-based-affinity: 'true'
    appgw.ingress.kubernetes.io/ssl-redirect: 'true'
    cert-manager.io/cluster-issuer: letsencrypt-production
    kubernetes.io/ingress.allow-http: 'false'
    kubernetes.io/ingress.class: azure/application-gateway
spec:
  tls:
    - hosts:
        - 自己填
      secretName: 自己填 記得要去蓋secret
  rules:
    - host: 自己填
      http:
        paths:
          - path: /alertmanager-test-yc/*
            pathType: ImplementationSpecific
            backend:
              serviceName: alertmanager-main
              servicePort: 9093

蓋prometheus

  • ServiceAccount
  • ClusterRole
  • ClusterRoleBinding
  • Prometheus
  • Service
  • Ingress
apiVersion: v1
kind: ServiceAccount
metadata:
  name: prometheus-k8s-test
  namespace: yc

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

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: prometheus-k8s-test-yc
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: prometheus-k8s-test-yc
subjects:
- kind: ServiceAccount
  name: prometheus-k8s-test
  namespace: yc

apiVersion: monitoring.coreos.com/v1
kind: Prometheus
metadata:
  labels:
    prometheus: k8s
  name: k8s
  namespace: yc
spec:
  externalUrl: https://自己填/prometheus-test-yc
  alerting:
    alertmanagers:
    - name: alertmanager-main
      namespace: yc
      port: web
  image: quay.io/prometheus/prometheus:v2.22.1
  nodeSelector:
    kubernetes.io/os: linux
  podMonitorNamespaceSelector: {}
  podMonitorSelector: {}
  probeNamespaceSelector: {}
  probeSelector: {}
  replicas: 2
  resources:
    requests:
      memory: 400Mi
  ruleSelector:
    matchLabels:
      prometheus: k8s
      role: alert-rules
  securityContext:
    fsGroup: 2000
    runAsNonRoot: true
    runAsUser: 1000
  serviceAccountName: prometheus-k8s-test
  serviceMonitorNamespaceSelector: {}
  serviceMonitorSelector: {}
  version: v2.22.1

apiVersion: v1
kind: Service
metadata:
  labels:
    prometheus: k8s
  name: prometheus-k8s-test
  namespace: yc
spec:
  ports:
  - name: web
    port: 9090
    targetPort: web
  selector:
    app: prometheus
    prometheus: k8s
  sessionAffinity: ClientIP

kind: Ingress
apiVersion: networking.k8s.io/v1beta1
metadata:
  name: prometheus
  namespace: yc
  annotations:
    appgw.ingress.kubernetes.io/backend-path-prefix: /
    appgw.ingress.kubernetes.io/connection-draining: 'true'
    appgw.ingress.kubernetes.io/connection-draining-timeout: '30'
    appgw.ingress.kubernetes.io/cookie-based-affinity: 'true'
    appgw.ingress.kubernetes.io/ssl-redirect: 'true'
    cert-manager.io/cluster-issuer: letsencrypt-production
    kubernetes.io/ingress.allow-http: 'false'
    kubernetes.io/ingress.class: azure/application-gateway
spec:
  tls:
    - hosts:
        - 自己填
      secretName: 自己填
  rules:
    - host: 自己填
      http:
        paths:
          - path: /prometheus-test-yc/*
            pathType: ImplementationSpecific
            backend:
              serviceName: prometheus-k8s-test
              servicePort: 9090

方便測試 推薦

serviceMonitorSelector: {}

先改成

serviceMonitorSelector: 
    matchLabels:
        k8s-app: yc

如果你是按著我步驟走到這邊
恭喜你 改一下ls的yaml檔案吧
首先
kubectl delete Prometheus k8s -n yc
然後改寫
vi Prometheus.yaml
按a進入編輯模式,就修完之後按esc退出然後輸入:wq

這樣就只會抓到k8s-app為yc的service monitoring了

ServiceMonitors如下

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  labels:
    k8s-app: prometheus
  name: prometheus
  namespace: yc
spec:
  endpoints:
  - interval: 30s
    port: web
  selector:
    matchLabels:
      prometheus: k8s


apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  labels:
    k8s-app: yc
  name: alertmanager
  namespace: yc
spec:
  endpoints:
  - interval: 30s
    port: web
  selector:
    matchLabels:
      alertmanager: main

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/name: prometheus-operator
    app.kubernetes.io/version: v0.44.1
    k8s-app: yc
  name: prometheus-operator
  namespace: yc
spec:
  endpoints:
  - bearerTokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
    honorLabels: true
    port: https
    scheme: https
    tlsConfig:
      insecureSkipVerify: true
  selector:
    matchLabels:
      app.kubernetes.io/component: controller
      app.kubernetes.io/name: prometheus-operator
      app.kubernetes.io/version: v0.44.1

然後你就可以看到這樣啦https://ithelp.ithome.com.tw/upload/images/20210601/20111603iQaJiZFDDR.png

架大概這樣,測的部分下集待續,謝謝

然後會生成一個.gz的秘密 可以這樣進去看
kubectl get secret -n yc prometheus-k8s -o json | jq -r '.data."prometheus.yaml.gz"' | base64 -d | gzip -d


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1 則留言

0
smallwhitetw
iT邦新手 5 級 ‧ 2021-07-01 22:57:08

版主牛逼，一點精美的圖片，一小段簡潔的說明，即可讓人融會貫通。水啦

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