Info

Kubernetes-operator

https://kubernetes.io/ko/docs/concepts/extend-kubernetes/operator/

Info

Operator는 특정 애플리케이션 컨트롤러 인 Kubernetes API를 확장하기 위해 회사에서 개발 한 CoreOS에 의해 생성됩니다 .

데이터베이스, 캐싱 및 모니터링 시스템과 같은 복잡한 상태 저장 애플리케이션을 생성, 구성 및 관리하는 데 사용됩니다.

Operator는 Kubernetes의 리소스 및 컨트롤러 개념을 기반으로하지만 일부 애플리케이션 별 전문 지식도 포함합니다.

예를 들어 데이터베이스 운영자를 생성하려면 생성 된 데이터베이스의 다양한 운영 및 유지 관리 방법에 매우 익숙해야합니다.

Operator를 만드는 열쇠는 CRD (custom resources)의 디자인입니다.

Image Added

https://github.com/prometheus-operator/kube-prometheus

ServiceMonitor

ServiceMonitor란 CRD(CustomResourceDefinition) 방식으로 Operator (코어OS 최초 시작)를 이용하여 Metric을 관리하는 방법 입니다.
Metric 추가 작업 시 prometheus.yml 파일에 manual하게 추가하는 것이 아니고 별도의 Kubernetes Object Servicemonitor (마치 configmap, deployment 처럼)를 이용합니다.
https://www.fatalerrors.org/a/rapid-deployment-of-kubernetes-monitoring-system-kube-prometheus.html

Summary

kube-prometheus-stack collects Kubernetes manifests, Grafana dashboards, and Prometheus rules combined with documentation and scripts to provide easy to operate end-to-end Kubernetes cluster monitoring with Prometheus using the Prometheus Operator.
Installs the kube-prometheus stack, a collection of Kubernetes manifests, Grafana dashboards, and Prometheus rules combined with documentation and scripts to provide easy to operate end-to-end Kubernetes cluster monitoring with Prometheus using the Prometheus Operator.

Dependencies

By default this chart installs additional, dependent charts:

Guide for kube-prometheus-stack with Helm3.x

https://artifacthub.io/packages/helm/prometheus-community/kube-prometheus-stack

...

Prometheus Stacks에서 사용가능한 StorageClass는 AzureDisk이므로 'default 또는 managed-premium'을 사용해야 합니다.

...

Code Block

sansae@win10pro-worksp:/workspaces$ kubectl editget prometheus -n monitor-pga
NAME                               VERSION   REPLICAS   AGE
kube-prometheus-stack-prometheus -n monitor-po

  v2.24.0   1          6d3h


sansae@win10pro-worksp:/workspaces$ kubectl edit prometheus kube-prometheus-stack-prometheus -n monitor-po
=============================================================
156   storage:
157     volumeClaimTemplate:
158       spec:
159         accessModes:
160         - ReadWriteOnce
161         resources:
162           requests:
163             storage: 50Gi
164         storageClassName: managed-premium
=============================================================

prometheus.monitoring.coreos.com/kube-prometheus-stack-prometheus edited

05-03. Alertmanager Volume

Alertmanager의 storage에 storageClassName: managed-premium를 추가 합니다.
storage 사이즈도 프로젝트스펙에 맞게 적절하게 수정 합니다.

Code Block




sansae@win10pro-worksp:/workspaces$ kubectl editget alertmanagerpvc kube-prometheus-stack-alertmanager -n monitor-po
=============================================================
 85   storage:
 86NAME          volumeClaimTemplate:
 87       spec:
 88                                    storageClassName: managed-premium
 89         accessModes: ["ReadWriteOnce"]
 90         resources:
 91           requests:
 92          STATUS   storage: 2Gi
=============================================================
alertmanager.monitoring.coreos.com/kube-prometheus-stack-alertmanager edited

05-04. Grafana Volume

Grafana는 Prometheus-operator로 구성된 리소스가 아닙니다.
따라서, PVC를 수동으로 생성하고, Deployment에 PVC를 사용하도록 수정해 줍니다.

VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS      AGE
prometheus-kube-prometheus-stack-prometheus-db-prometheus-kube-prometheus-stack-prometheus-0           Bound    pvc-64f88c7f-6fad-4d66-b6eb-xxxxxxxxx   50Gi       RWO            managed-premium   6d2h

05-03. Alertmanager Volume

Alertmanager의 storage에 storageClassName: managed-premium를 추가 합니다.
storage 사이즈도 프로젝트스펙에 맞게 적절하게 수정 합니다.

Code Block

sansae@win10pro-worksp:/workspaces$ kubectl get alertmanager -n monitor-po
NAME                                 VERSION   REPLICAS   AGE
kube-prometheus-stack-alertmanager   v0.21.0   1          6d3h


sansae@win10pro-worksp:/workspaces$ kubectl edit alertmanager kube-prometheus-stack-alertmanager -n monitor-po
=============================================================
  storage:
    volumeClaimTemplate:
      spec:
        accessModes:
        - ReadWriteOnce
        resources:
          requests:
            storage: 2Gi
        storageClassName: managed-premium
=============================================================
alertmanager.monitoring.coreos.com/kube-prometheus-stack-alertmanager edited


sansae@win10pro-worksp:/workspaces$ kubectl get pvc -n monitor-po
NAME                                                                                                   STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS      AGE
alertmanager-kube-prometheus-stack-alertmanager-db-alertmanager-kube-prometheus-stack-alertmanager-0   Bound    pvc-5e7b02eb-7109-417d-9c14-xxxxxxxx   2Gi        RWO            managed-premium   6d2h

05-04. Grafana Volume

Grafana는 Prometheus-operator로 구성된 리소스가 아닙니다.
따라서, PVC를 수동으로 생성하고, Deployment에 PVC를 사용하도록 수정해 줍니다.

Code Block

sansae@win10pro-worksp:/workspaces$ vim grafana-pvc.yaml
=============================================================
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: grafana-pv-claim
  labels:
    app: grafana
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: managed-premium
=============================================================
sansae@win10pro-worksp:/workspaces$ kubectl create -f grafana-pvc.yaml
create pvc!!!



sansae@win10pro-worksp:/workspaces$ kubectl get deploy -n monitor-pga
NAME                                       READY   UP-TO-DATE   AVAILABLE   AGE
kube-prometheus-stack-grafana              1/1     1            1           6d3h


sansae@win10pro-worksp:/workspaces$ kubectl edit deploy kube-prometheus-stack-grafana -n monitor-po
=

Code Block

sansae@win10pro-worksp:/workspaces$ cat grafana-pvc.yaml
=============================================================
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: grafana-pv-claim
  labels:
    app: grafana
spec:
  accessModes:
=======
       volumeMounts:
       - mountPath: /var/lib/grafana
         name: grafana-persistent-storage
-------------------------------------------------------
       volumes:
       - ReadWriteOnce
  resources:name: grafana-persistent-storage
    requests:
      storagepersistentVolumeClaim: 1Gi
  storageClassName: managed-premium
=============================================================
sansae@win10pro-worksp:/workspaces$ kubectl create -f grafana-pvc.yaml
create pvc!!!

sansae@win10pro-worksp:/workspaces$ kubectl edit deploy kube-prometheus-stack-grafana -n monitor-po

           claimName: grafana-pv-claim
==============================================================
400==========
deployment.apps/kube-prometheus-stack-grafana edited


sansae@win10pro-worksp:/workspaces$ kubectl get pvc -n monitor-po
NAME                  STATUS   VOLUME                                - mountPath: /var/lib/grafana
401CAPACITY   ACCESS MODES   STORAGECLASS     name: AGE
grafana-persistent-storage
-------------------------------------------------------
453pv-claim      Bound  - name: grafana-persistent-storage
454 pvc-a13463fa-ebda-4632-a9c0-xxxxxxxx   1Gi      persistentVolumeClaim:
455  RWO         claimName: grafana-pv-claim
=============================================================
deployment.apps/kube-prometheus-stack-grafana edited     managed-premium   6d2h

06. Service Connection

06-01. Prometheus Operated

...

Code Block

sansae@win10pro-worksp:$ kubectl port-forward service/kube-prometheus-stack-alertmanager 9093:9093 -n monitor-po
Forwarding from 127.0.0.1:9093 -> 9093
Forwarding from [::1]:9093 -> 9093 -> 9093
Forwarding from [::1]:9093 -> 9093

Image Removed

참고: 삭제할 경우 namespace이외에 삭제 해야할 리소스

Image Added

참고: 삭제할 경우 namespace이외에 삭제 해야할 리소스

Code Block

for n in $(kubectl get namespaces -o jsonpath={..metadata.name}); do
  kubectl delete --all --namespace=$n prometheus,servicemonitor,podmonitor,alertmanager
done

Code Block

kubectl delete crd alertmanagerconfigs.monitoring.coreos.com
kubectl delete crd alertmanagers.monitoring.coreos.com
kubectl delete crd podmonitors.monitoring.coreos.com
kubectl delete crd probes.monitoring.coreos.com
kubectl delete crd prometheuses.monitoring.coreos.com
kubectl delete crd prometheusrules.monitoring.coreos.com
kubectl delete crd servicemonitors.monitoring.coreos.com
kubectl delete crd thanosrulers.monitoring.coreos.com

kubectl delete clusterrole kube-prometheus-stack-grafana-clusterrole
kubectl delete clusterrole kube-prometheus-stack-kube-state-metrics
kubectl delete clusterrole kube-prometheus-stack-operator
kubectl delete clusterrole kube-prometheus-stack-operator-psp
kubectl delete clusterrole kube-prometheus-stack-prometheus
kubectl delete clusterrole kube-prometheus-stack-prometheus-psp
kubectl delete clusterrole psp-kube-prometheus-stack-kube-state-metrics
kubectl delete clusterrole psp-kube-prometheus-stack-prometheus-node-exporter

kubectl delete clusterrolebinding kube-prometheus-stack-grafana-clusterrolebinding
kubectl delete clusterrolebinding kube-prometheus-stack-kube-state-metrics
kubectl delete clusterrolebinding kube-prometheus-stack-operator
kubectl delete clusterrolebinding kube-prometheus-stack-operator-psp
kubectl delete clusterrolebinding kube-prometheus-stack-prometheus
kubectl delete clusterrolebinding kube-prometheus-stack-prometheus-psp
kubectl delete clusterrolebinding psp-kube-prometheus-stack-kube-state-metrics
kubectl delete clusterrolebinding psp-kube-prometheus-stack-prometheus-node-exporter

kubectl delete svc kube-prometheus-stack-coredns -n kube-system
kubectl delete svc kube-prometheus-stack-kube-controller-manager -n kube-system
kubectl delete svc kube-prometheus-stack-kube-etcd -n kube-system
kubectl delete svc kube-prometheus-stack-kube-proxy -n kube-system
kubectl delete svc kube-prometheus-stack-kube-scheduler -n kube-system
kubectl delete svc kube-prometheus-stack-kubelet -n kube-system
kubectl delete svc prometheus-kube-prometheus-kubelet -n kube-system

kubectl delete MutatingWebhookConfiguration kube-prometheus-stack-admission
kubectl delete ValidatingWebhookConfiguration kubekube-prometheus-stack-admission

참조:

Info
https://containerjournal.com/topics/container-management/cluster-monitoring-with-prometheus- stack-admission

참조:

operator/

https://kangwoo.kr/2020/06/20/kubernetes-monitoring-3-kube-prometheus-%ec%84%a4%ec%b9%98-%ed%9b%84-%ed%95%b4%ec%95%bc-%ed%95%a0%ec%9d%bc/

https://waspro.tistory.com/588

https://strange-developer.tistory.com/53

https://docs.syseleven.de/metakube/de/metakube-accelerator/building-blocks/observability-monitoring/kube-prometheus-stack

https://kangwoo.kr/2020/06/13/kubernetes-monitoring-1-kube-prometheus-%EC%84%A4%EC%B9%98%ED%95%98%EA%B8%B0/

Page tree

Versions Compared

Old Version 22

New Version Current

Key

Kubernetes-operator

ServiceMonitor

Summary

Dependencies

Guide for kube-prometheus-stack with Helm3.x

05-03. Alertmanager Volume

05-04. Grafana Volume

05-03. Alertmanager Volume

05-04. Grafana Volume

06. Service Connection

06-01. Prometheus Operated

참고: 삭제할 경우 namespace이외에 삭제 해야할 리소스

참고: 삭제할 경우 namespace이외에 삭제 해야할 리소스

참조:

참조:

Page tree

Page History

Versions Compared

Old Version 22

New Version Current

Key

Kubernetes-operator

ServiceMonitor

Summary

Dependencies

Guide for kube-prometheus-stack with Helm3.x

05-03. Alertmanager Volume

05-04. Grafana Volume

05-03. Alertmanager Volume

05-04. Grafana Volume

06. Service Connection

06-01. Prometheus Operated

참고: 삭제할 경우 namespace이외에 삭제 해야할 리소스

참고: 삭제할 경우 namespace이외에 삭제 해야할 리소스

참조:

참조: