【K8S運維知識彙總】第7天2：交付Exporters至k8s叢集

就叫一片白紙發表於2020-10-23

交付kube-state-metrics

準備基礎映象

kube-state-metrics官方quay.io地址 https://quay.io/repository/coreos/kube-state-metrics?tab=info

[root@k8s7-200.host.com /opt/src]# docker image tag 91599517197a harbor.od.com/public/kube-state-metrics:v1.5.0
[root@k8s7-200.host.com /opt/src]# docker push harbor.od.com/public/kube-state-metrics:v1.5.0

準備資源配置清單

1.rbac.yaml
[root@k8s7-200.host.com /data/k8s-yaml/kube-state-metrics]# cat rbac.yaml 
apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    addonmanager.kubernetes.io/mode: Reconcile
    kubernetes.io/cluster-service: "true"
  name: kube-state-metrics
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  labels:
    addonmanager.kubernetes.io/mode: Reconcile
    kubernetes.io/cluster-service: "true"
  name: kube-state-metrics
rules:
- apiGroups:
  - ""
  resources:
  - configmaps
  - secrets
  - nodes
  - pods
  - services
  - resourcequotas
  - replicationcontrollers
  - limitranges
  - persistentvolumeclaims
  - persistentvolumes
  - namespaces
  - endpoints
  verbs:
  - list
  - watch
- apiGroups:
  - extensions
  resources:
  - daemonsets
  - deployments
  - replicasets
  verbs:
  - list
  - watch
- apiGroups:
  - apps
  resources:
  - statefulsets
  verbs:
  - list
  - watch
- apiGroups:
  - batch
  resources:
  - cronjobs
  - jobs
  verbs:
  - list
  - watch
- apiGroups:
  - autoscaling
  resources:
  - horizontalpodautoscalers
  verbs:
  - list
  - watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  labels:
    addonmanager.kubernetes.io/mode: Reconcile
    kubernetes.io/cluster-service: "true"
  name: kube-state-metrics
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: kube-state-metrics
subjects:
- kind: ServiceAccount
  name: kube-state-metrics
  namespace: kube-system

2.deployment.yaml
[root@k8s7-200.host.com /data/k8s-yaml/kube-state-metrics]# cat deployment.yaml 
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  annotations:
    deployment.kubernetes.io/revision: "2"
  labels:
    grafanak8sapp: "true"
    app: kube-state-metrics
  name: kube-state-metrics
  namespace: kube-system
spec:
  selector:
    matchLabels:
      grafanak8sapp: "true"
      app: kube-state-metrics
  strategy:
    rollingUpdate:
      maxSurge: 25%
      maxUnavailable: 25%
    type: RollingUpdate
  template:
    metadata:
      creationTimestamp: null
      labels:
        grafanak8sapp: "true"
        app: kube-state-metrics
    spec:
      containers:
      - image: harbor.od.com/public/kube-state-metrics:v1.5.0
        name: kube-state-metrics
        ports:
        - containerPort: 8080
          name: http-metrics
          protocol: TCP
        readinessProbe:
          failureThreshold: 3
          httpGet:
            path: /healthz
            port: 8080
            scheme: HTTP
          initialDelaySeconds: 5
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 5
        imagePullPolicy: IfNotPresent
      imagePullSecrets:
      - name: harbor
      restartPolicy: Always
      serviceAccount: kube-state-metrics
      serviceAccountName: kube-state-metrics

應用資源配置清單

[root@k8s7-22.host.com ~]# kubectl apply -f http://k8s-yaml.od.com/kube-state-metrics/rbac.yaml
serviceaccount/kube-state-metrics created
clusterrole.rbac.authorization.k8s.io/kube-state-metrics created
clusterrolebinding.rbac.authorization.k8s.io/kube-state-metrics created
[root@k8s7-22.host.com ~]# kubectl apply -f http://k8s-yaml.od.com/kube-state-metrics/deployment.yaml
deployment.extensions/kube-state-metrics created

檢查驗證

[root@k8s7-22.host.com ~]# curl 172.7.21.16:8080/healthz
ok

交付node-exporter

準備基礎映象

[root@k8s7-200.host.com /opt/src]# docker load -i node-exporter-v0.15.0.tar 
[root@k8s7-200.host.com /opt/src]# docker image tag 12d51ffa2b22 harbor.od.com/public/node-exporter:v0.15.0
[root@k8s7-200.host.com /opt/src]# docker push harbor.od.com/public/node-exporter:v0.15.0

準備資源配置清單

[root@k8s7-200.host.com /data/k8s-yaml/node-exporter]# cat daemonset.yaml 
kind: DaemonSet
apiVersion: extensions/v1beta1
metadata:
  name: node-exporter
  namespace: kube-system
  labels:
    daemon: "node-exporter"
    grafanak8sapp: "true"
spec:
  selector:
    matchLabels:
      daemon: "node-exporter"
      grafanak8sapp: "true"
  template:
    metadata:
      name: node-exporter
      labels:
        daemon: "node-exporter"
        grafanak8sapp: "true"
    spec:
      volumes:
      - name: proc
        hostPath: 
          path: /proc
          type: ""
      - name: sys
        hostPath:
          path: /sys
          type: ""
      containers:
      - name: node-exporter
        image: harbor.od.com/public/node-exporter:v0.15.0
        args:
        - --path.procfs=/host_proc
        - --path.sysfs=/host_sys
        ports:
        - name: node-exporter
          hostPort: 9100
          containerPort: 9100
          protocol: TCP
        volumeMounts:
        - name: sys
          readOnly: true
          mountPath: /host_sys
        - name: proc
          readOnly: true
          mountPath: /host_proc
      imagePullSecrets:
      - name: harbor
      restartPolicy: Always
      hostNetwork: true

應用資源配置清單

[root@k8s7-22.host.com ~]# kubectl apply -f http://k8s-yaml.od.com/node-exporter/daemonset.yaml
daemonset.extensions/node-exporter created

檢查驗證

[root@k8s7-21.host.com ~]# netstat -lntup|grep 9100
tcp6       0      0 :::9100                 :::*                    LISTEN      84172/node_exporter 

[root@k8s7-21.host.com ~]# kubectl get pods -n kube-system -l daemon="node-exporter" -o wide
NAME                  READY   STATUS    RESTARTS   AGE     IP          NODE               NOMINATED NODE   READINESS GATES
node-exporter-kbkt4   1/1     Running   0          2m46s   10.4.7.22   k8s7-22.host.com   <none>           <none>
node-exporter-p7gsp   1/1     Running   0          2m46s   10.4.7.21   k8s7-21.host.com   <none>           <none>

[root@k8s7-21.host.com ~]# curl -s 10.4.7.21:9100/metrics |head
# HELP go_gc_duration_seconds A summary of the GC invocation durations.
# TYPE go_gc_duration_seconds summary
go_gc_duration_seconds{quantile="0"} 0
go_gc_duration_seconds{quantile="0.25"} 0
go_gc_duration_seconds{quantile="0.5"} 0
go_gc_duration_seconds{quantile="0.75"} 0
go_gc_duration_seconds{quantile="1"} 0
go_gc_duration_seconds_sum 0
go_gc_duration_seconds_count 0
# HELP go_goroutines Number of goroutines that currently exist.

交付cadvisor

準備基礎映象

[root@k8s7-200.host.com /opt/src]# docker load -i cadvisor-v0.28.3.tar
[root@k8s7-200.host.com /opt/src]# docker image tag 75f88e3ec333 harbor.od.com/public/cadvisor-v0.28.3
[root@k8s7-200.host.com /opt/src]# docker push harbor.od.com/public/cadvisor-v0.28.3

準備資源配置清單

[root@k8s7-200.host.com /data/k8s-yaml/cadvisor]# cat daemonset.yaml 
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: cadvisor
  namespace: kube-system
  labels:
    app: cadvisor
spec:
  selector:
    matchLabels:
      name: cadvisor
  template:
    metadata:
      labels:
        name: cadvisor
    spec:
      hostNetwork: true
      tolerations:
      - key: node-role.kubernetes.io/master
        effect: NoSchedule
      containers:
      - name: cadvisor
        image: harbor.od.com/public/cadvisor:v0.28.3
        imagePullPolicy: IfNotPresent
        volumeMounts:
        - name: rootfs
          mountPath: /rootfs
          readOnly: true
        - name: var-run
          mountPath: /var/run
        - name: sys
          mountPath: /sys
          readOnly: true
        - name: docker
          mountPath: /var/lib/docker
          readOnly: true
        ports:
          - name: http
            containerPort: 4194
            protocol: TCP
        readinessProbe:
          tcpSocket:
            port: 4194
          initialDelaySeconds: 5
          periodSeconds: 10
        args:
          - --housekeeping_interval=10s
          - --port=4194
      terminationGracePeriodSeconds: 30
      volumes:
      - name: rootfs
        hostPath:
          path: /
      - name: var-run
        hostPath:
          path: /var/run
      - name: sys
        hostPath:
          path: /sys
      - name: docker
        hostPath:
          path: /data/docker

其它知識：

      tolerations:
      - key: node-role.kubernetes.io/master
        effect: NoSchedule
汙點容忍（可以容忍）
打汙點
[root@k8s7-22.host.com ~]# kubectl taint node k8s7-21.host.com node-role.kubernetes.io/master=master:NoSchedule
node/k8s7-21.host.com tainted

在這裡插入圖片描述

修改運算節點軟連線

[root@hdss7-21 ~]# mount -o remount,rw /sys/fs/cgroup/
[root@hdss7-21 ~]# ln -s /sys/fs/cgroup/cpu,cpuacct /sys/fs/cgroup/cpuacct,cpu
[root@hdss7-21 ~]# ll /sys/fs/cgroup/ | grep cpu
total 0
lrwxrwxrwx 1 root root 11 Jan 28 22:41 cpu -> cpu,cpuacct
lrwxrwxrwx 1 root root 11 Jan 28 22:41 cpuacct -> cpu,cpuacct
lrwxrwxrwx 1 root root 27 May  5 11:15 cpuacct,cpu -> /sys/fs/cgroup/cpu,cpuacct/
drwxr-xr-x 8 root root  0 Apr 26 11:06 cpu,cpuacct
drwxr-xr-x 7 root root  0 Jan 28 22:41 cpuset


刪除汙點
[root@k8s7-21.host.com ~]# kubectl taint node k8s7-21.host.com node-role.kubernetes.io/master-

在這裡插入圖片描述

應用資源配置清單

[root@k8s7-22.host.com ~]# kubectl apply -f http://k8s-yaml.od.com/cadvisor/daemonset.yaml
daemonset.apps/cadvisor created

檢查驗證

在這裡插入圖片描述

交付blackbox-exporter

準備基礎映象

https://hub.docker.com/r/prom/blackbox-exporter
https://github.com/prometheus/blackbox_exporter

[root@k8s7-200.host.com /opt/src]# docker image tag 81b70b6158be harbor.od.com/public/blackbox-exporter:v0.15.1
[root@k8s7-200.host.com /opt/src]# docker push harbor.od.com/public/blackbox-exporter:v0.15.1

準備資源配置清單

[root@k8s7-200.host.com /data/k8s-yaml/blackbox-exporter]# cat configmap.yaml 
apiVersion: v1
kind: ConfigMap
metadata:
  labels:
    app: blackbox-exporter
  name: blackbox-exporter
  namespace: kube-system
data:
  blackbox.yml: |-
    modules:
      http_2xx:
        prober: http
        timeout: 2s
        http:
          valid_http_versions: ["HTTP/1.1", "HTTP/2"]
          valid_status_codes: [200,301,302]
          method: GET
          preferred_ip_protocol: "ip4"
      tcp_connect:
        prober: tcp
        timeout: 2s

[root@k8s7-200.host.com /data/k8s-yaml/blackbox-exporter]# cat deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: blackbox-exporter
  namespace: kube-system
  labels:
    app: blackbox-exporter
  annotations:
    deployment.kubernetes.io/revision: 1
spec:
  replicas: 1
  selector:
    matchLabels:
      app: blackbox-exporter
  template:
    metadata:
      labels:
        app: blackbox-exporter
    spec:
      volumes:
      - name: config
        configMap:
          name: blackbox-exporter
          defaultMode: 420
      containers:
      - name: blackbox-exporter
        image: harbor.od.com/public/blackbox-exporter:v0.15.1
        imagePullPolicy: IfNotPresent
        args:
        - --config.file=/etc/blackbox_exporter/blackbox.yml
        - --log.level=info
        - --web.listen-address=:9115
        ports:
        - name: blackbox-port
          containerPort: 9115
          protocol: TCP
        resources:
          limits:
            cpu: 200m
            memory: 256Mi
          requests:
            cpu: 100m
            memory: 50Mi
        volumeMounts:
        - name: config
          mountPath: /etc/blackbox_exporter
        readinessProbe:
          tcpSocket:
            port: 9115
          initialDelaySeconds: 5
          timeoutSeconds: 5
          periodSeconds: 10
          successThreshold: 1
          failureThreshold: 3

[root@k8s7-200.host.com /data/k8s-yaml/blackbox-exporter]# cat service.yaml
# 沒有指定targetPort是因為Pod中暴露埠名稱為 blackbox-port
apiVersion: v1
kind: Service
metadata:
  name: blackbox-exporter
  namespace: kube-system
spec:
  selector:
    app: blackbox-exporter
  ports:
    - name: blackbox-port
      protocol: TCP
      port: 9115

[root@k8s7-200.host.com /data/k8s-yaml/blackbox-exporter]# cat ingress.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: blackbox-exporter
  namespace: kube-system
spec:
  rules:
  - host: blackbox.od.com
    http:
      paths:
      - path: /
        backend:
          serviceName: blackbox-exporter
          servicePort: blackbox-port

應用資源配置清單

[root@k8s7-22.host.com ~]# kubectl apply -f http://k8s-yaml.od.com/blackbox-exporter/configmap.yaml
configmap/blackbox-exporter created
[root@k8s7-22.host.com ~]# kubectl apply -f http://k8s-yaml.od.com/blackbox-exporter/deployment.yaml
deployment.extensions/blackbox-exporter created
[root@k8s7-22.host.com ~]# kubectl apply -f http://k8s-yaml.od.com/blackbox-exporter/service.yaml
service/blackbox-exporter created
[root@k8s7-22.host.com ~]# kubectl apply -f http://k8s-yaml.od.com/blackbox-exporter/ingress.yaml
ingress.extensions/blackbox-exporter created

DNS解析

[root@k8s7-11.host.name ~]# tail /var/named/od.com.zone 
blackbox	   A	10.4.7.10

檢查驗證

在這裡插入圖片描述

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【K8S運維知識彙總】第7天2：交付Exporters至k8s叢集

文章目錄

交付kube-state-metrics

準備基礎映象

準備資源配置清單

應用資源配置清單

檢查驗證

交付node-exporter

準備基礎映象

準備資源配置清單

應用資源配置清單

檢查驗證

交付cadvisor

準備基礎映象

準備資源配置清單

修改運算節點軟連線

應用資源配置清單

檢查驗證

交付blackbox-exporter

準備基礎映象

準備資源配置清單

應用資源配置清單

DNS解析

檢查驗證

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