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Info

Table of Contents

00. 사전조건

Info
iconfalse

Prerequisites

  • Kubernetes 1.16+
  • Helm 3+
  1. Kubernetes Cluster 구성
  2. kubectl 설치
  3. Kubernetes Config
  4. helm 설치

01. 개요

Info

Kubernetes-operator

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

02. Namespace 생성

Code Block
sansae@win10pro-worksp:$ kubectl create ns monitor-po

03. Install Chart of kube-prometheus-stack

  • 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

ServiceMonitor

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

02. 사전조건

Info
iconfalse

Prerequisites

  • Kubernetes 1.16+
  • Helm 3+
  1. Kubernetes Cluster 구성
  2. kubectl 설치
  3. Kubernetes Config
  4. helm 설치

03. Namespace 생성

Code Block
sansae@win10pro-worksp:$ kubectl create ns monitor-po

04. Install Chart of kube-prometheus-stack

Code Block
sansae@win10pro-worksp:$ helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
"prometheus-community" already exists with the same configuration, skipping
sansae@win10pro-worksp:$
sansae@win10pro-worksp:$ helm repo update
Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "ingress-nginx" chart repository
...Successfully got an update from the "elastic" chart repository
...Successfully got an update from the "dynatrace" chart repository
...Successfully got an update from the "prometheus-community" chart repository
Update Complete. ⎈Happy Helming!⎈
sansae@win10pro-worksp:$ helm install kube-prometheus-stack prometheus-community/kube-prometheus-stack -n monitor-po
NAME: kube-prometheus-stack
LAST DEPLOYED: Wed Mar 31 10:30:38 2021
NAMESPACE: monitor-po
STATUS: deployed
REVISION: 1
NOTES:
kube-prometheus-stack has been installed. Check its status by running:
  kubectl --namespace monitor-po get pods -l "release=kube-prometheus-stack"

Visit https://github.com/prometheus-operator/kube-prometheus for instructions on how to create & configure Alertmanager and Prometheus instances using the Operator.
sansae@win10pro-worksp:$ kubectl get all -n monitor-po
NAME                                                            READY   STATUS    RESTARTS   AGE
pod/alertmanager-kube-prometheus-stack-alertmanager-0           2/2     Running   0          91s
pod/kube-prometheus-stack-grafana-6b5c8fd86c-lwcv2              2/2     Running   0          93s
pod/kube-prometheus-stack-kube-state-metrics-7877f4cc7c-b2nnc   1/1     Running   0          93s
pod/kube-prometheus-stack-operator-5859b9c949-4n24x             1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-5f4pm        1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-5fbc7        1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-ggj8c        1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-h5cfj        1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-hvpsf        1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-mbt54        1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-s5zd9        1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-v7bsj        1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-v7sts        1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-vnmx5        1/1     Running   0          93s
pod/prometheus-kube-prometheus-stack-prometheus-0               2/2     Running   1          91s

NAME                                                     TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)
       AGE
service/alertmanager-operated                            ClusterIP   None           <none>        9093/TCP,9094/TCP,9094/UDP   91s
service/kube-prometheus-stack-alertmanager               ClusterIP   10.0.92.245    <none>        9093/TCP
       93s
service/kube-prometheus-stack-grafana                    ClusterIP   10.0.240.51    <none>        80/TCP
       93s
service/kube-prometheus-stack-kube-state-metrics         ClusterIP   10.0.47.252    <none>        8080/TCP
       93s
service/kube-prometheus-stack-operator                   ClusterIP   10.0.215.243   <none>        443/TCP
       93s
service/kube-prometheus-stack-prometheus                 ClusterIP   10.0.152.193   <none>        9090/TCP
       93s
service/kube-prometheus-stack-prometheus-node-exporter   ClusterIP   10.0.216.169   <none>        9100/TCP
       93s
service/prometheus-operated                              ClusterIP   None           <none>        9090/TCP
       91s

NAME                                                            DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR   AGE
daemonset.apps/kube-prometheus-stack-prometheus-node-exporter   10        10        10      10           10          <none>          93s

NAME                                                       READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/kube-prometheus-stack-grafana              1/1     1            1           93s
deployment.apps/kube-prometheus-stack-kube-state-metrics   1/1     1            1           93s
deployment.apps/kube-prometheus-stack-operator             1/1     1            1           93s

NAME                                                                  DESIRED   CURRENT   READY   AGE
replicaset.apps/kube-prometheus-stack-grafana-6b5c8fd86c              1         1         1       93s
replicaset.apps/kube-prometheus-stack-kube-state-metrics-7877f4cc7c   1         1         1       93s
replicaset.apps/kube-prometheus-stack-operator-5859b9c949             1         1         1       93s

NAME                                                               READY   AGE
statefulset.apps/alertmanager-kube-prometheus-stack-alertmanager   1/1     91s
statefulset.apps/prometheus-kube-prometheus-stack-prometheus       1/1     91s
sansae@win10pro-worksp:$

05. Volume 설정

05-01. StorageClass 확인

  • Prometheus Stacks에서 사용가능한 StorageClass는 AzureDisk이므로 'default 또는 managed-premium'을 사용해야 합니다.
Code Block
sansae@win10pro-worksp:/workspaces$ kubectl get sc
NAME                PROVISIONER                RECLAIMPOLICY   VOLUMEBINDINGMODE      ALLOWVOLUMEEXPANSION   AGE
azurefile           kubernetes.io/azure-file   Delete          Immediate              true                   65d
azurefile-premium   kubernetes.io/azure-file   Delete          Immediate              true                   65d
default (default)   kubernetes.io/azure-disk   Delete          Immediate              true                   65d
managed             kubernetes.io/azure-disk   Delete          WaitForFirstConsumer   true                   30d
managed-premium     kubernetes.io/azure-disk   Delete          Immediate              true                   65d

05-02. Prometheus Volume

  • Prometheus의 storage에 storageClassName: managed-premium를 추가 합니다.
  • storage 사이즈도 프로젝트스펙에 맞게 적절하게 수정 합니다.
Code Block
sansae@win10pro-worksp:/workspaces$ kubectl get prometheus -n monitor-pga
Code Block
sansae@win10pro-worksp:$ git clone https://github.com/prometheus-community/helm-charts.git
sansae@win10pro-worksp:$ mv helm-charts prometheus
sansae@win10pro-worksp:/prometheus$
sansae@win10pro-worksp:$ helm install kube-prometheus-stack/ -n monitor-po
NAME: kube-prometheus-stack
LAST DEPLOYED: Wed Mar 31 10:30:38 2021
NAMESPACE: monitor-po
STATUS: deployed
REVISION: 1
NOTES:
kube-prometheus-stack has been installed. Check its status by running:
  kubectl --namespace monitor-po get pods -l "release=kube-prometheus-stack"

Visit https://github.com/prometheus-operator/kube-prometheus for instructions on how to create & configure Alertmanager and Prometheus instances using the Operator.
sansae@win10pro-worksp:$ kubectl get all -n monitor-po
NAME                               VERSION                             READY   STATUS    RESTARTSREPLICAS   AGE
pod/alertmanager-kube-prometheus-stack-alertmanager-0prometheus   v2.24.0   1     2/2     Running   0          91s
pod/kube-prometheus-stack-grafana-6b5c8fd86c-lwcv2              2/2     Running   0          93s
pod/kube-prometheus-stack-kube-state-metrics-7877f4cc7c-b2nnc   1/1     Running   0 6d3h


sansae@win10pro-worksp:/workspaces$ kubectl edit prometheus kube-prometheus-stack-prometheus -n monitor-po
=============================================================
156   storage:
157     volumeClaimTemplate:
158       spec:
159         93s
pod/kube-prometheus-stack-operator-5859b9c949-4n24xaccessModes:
160         - ReadWriteOnce
161   1/1     Running resources:
162  0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-5f4pmrequests:
163        1/1     Running storage: 50Gi
164 0          93s
podstorageClassName: managed-premium
=============================================================

prometheus.monitoring.coreos.com/kube-prometheus-stack-prometheus-node-exporter-5fbc7        1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-ggj8c        1/1 edited


sansae@win10pro-worksp:/workspaces$ kubectl get pvc -n monitor-po
NAME         Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-h5cfj        1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-hvpsf        1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-mbt54        1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-s5zd9STATUS   VOLUME      1/1     Running   0          93s
pod/kube-prometheus-stack-prometheus-node-exporter-v7bsj        1/1     RunningCAPACITY   0ACCESS MODES   STORAGECLASS      93sAGE
pod/prometheus-kube-prometheus-stack-prometheus-nodedb-prometheus-exporter-v7sts        1/1kube-prometheus-stack-prometheus-0     Running   0   Bound       93s
pod/kube-prometheus-stack-prometheus-node-exporter-vnmx5pvc-64f88c7f-6fad-4d66-b6eb-xxxxxxxxx    50Gi    1/1   RWO  Running   0       managed-premium   93s
pod/prometheus-kube-prometheus-stack-prometheus-0               2/2     Running   16d2h

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             91s

NAME                    VERSION   REPLICAS   AGE
kube-prometheus-stack-alertmanager   v0.21.0   1          6d3h


sansae@win10pro-worksp:/workspaces$ kubectl edit alertmanager kube-prometheus-stack-alertmanager       TYPE   -n monitor-po
=============================================================
  storage:
    volumeClaimTemplate:
     CLUSTER-IP     EXTERNAL-IP spec:
   PORT(S)
       AGE
service/alertmanager-operatedaccessModes:
        - ReadWriteOnce
        resources:
          requests:
 ClusterIP   None        storage: 2Gi
  <none>        9093/TCP,9094/TCP,9094/UDP   91s
servicestorageClassName: managed-premium
=============================================================
alertmanager.monitoring.coreos.com/kube-prometheus-stack-alertmanager edited


sansae@win10pro-worksp:/workspaces$ kubectl get pvc -n monitor-po
NAME         ClusterIP      10.0.92.245    <none>        9093/TCP
       93s
service/kube-prometheus-stack-grafana                    ClusterIP   10.0.240.51    <none>        80/TCP
       93s
service/kube-prometheus-stack-kube-state-metrics            ClusterIP   10.0.47.252    <none>    STATUS    8080/TCP
VOLUME          93s
service/kube-prometheus-stack-operator                   ClusterIP   10.0.215.243   <none>  CAPACITY   ACCESS MODES  443/TCP
 STORAGECLASS      93s
service/AGE
alertmanager-kube-prometheus-stack-alertmanager-db-alertmanager-kube-prometheus-stack-stackalertmanager-prometheus0   Bound    pvc-5e7b02eb-7109-417d-9c14-xxxxxxxx   2Gi       ClusterIP RWO  10.0.152.193   <none>        9090/TCP
       93s
service/kube-prometheus-stack-prometheus-node-exporter   ClusterIP   10.0.216.169   <none>        9100/TCP
       93s
service/prometheus-operated                              ClusterIP   None           <none>        9090/TCP
       91s

NAME                          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                                  DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR   AGE
daemonset.apps/kube-prometheus-stack-prometheus-node-exportergrafana   10        10   1/1     101      10      1     10      6d3h


sansae@win10pro-worksp:/workspaces$ kubectl edit  <none>  deploy kube-prometheus-stack-grafana -n monitor-po
=============================================================
        93s

NAMEvolumeMounts:
       - mountPath: /var/lib/grafana
         name: grafana-persistent-storage
-------------------------------------------------------
       volumes:
       - name: grafana-persistent-storage
         persistentVolumeClaim:
            READY   UP-TO-DATE   AVAILABLE   AGEclaimName: grafana-pv-claim
=============================================================
deployment.apps/kube-prometheus-stack-grafana edited


sansae@win10pro-worksp:/workspaces$ kubectl get pvc -n monitor-po
NAME        1/1     1     STATUS   VOLUME    1           93s
deployment.apps/kube-prometheus-stack-kube-state-metrics   1/1     1          CAPACITY  1 ACCESS MODES   STORAGECLASS      93s
deployment.apps/kube-prometheus-stack-operatorAGE
grafana-pv-claim      Bound    pvc-a13463fa-ebda-4632-a9c0-xxxxxxxx   1/11Gi     1   RWO         1   managed-premium   6d2h

06. Service Connection

06-01. Prometheus Operated

Code Block
sansae@win10pro-worksp:$ kubectl get svc  93s
-n monitor-po
NAME                                             TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)     DESIRED   CURRENT   READY   AGE
replicaset.apps/kube-prometheus-stack-grafana-6b5c8fd86c           AGE
alertmanager-operated   1         1         1       93s
replicaset.apps/kube-prometheus-stack-kube-state-metrics-7877f4cc7cClusterIP   1None         1  <none>       1  9093/TCP,9094/TCP,9094/UDP      93s
replicaset.apps/30m
kube-prometheus-stack-operator-5859b9c949alertmanager             1  ClusterIP   10.0.92.245    1<none>        9093/TCP 1       93s

NAME             30m
kube-prometheus-stack-grafana                    ClusterIP   10.0.240.51    <none>        80/TCP               READY   AGE
statefulset.apps/alertmanager-kube-prometheus-stack-alertmanager   1/1     91s
statefulset.apps/prometheus-30m
kube-prometheus-stack-prometheuskube-state-metrics       1/1  ClusterIP   91s
sansae@win10pro-worksp:$

04. Service Connection

04-01. Prometheus Operated

Code Block
sansae@win10pro-worksp:$ kubectl get svc -n monitor-po
NAME10.0.47.252    <none>        8080/TCP                     30m
kube-prometheus-stack-operator                  TYPE ClusterIP   10.0.215.243   <none> CLUSTER-IP     EXTERNAL-IP   PORT(S)443/TCP                       AGE
alertmanager-operated30m
kube-prometheus-stack-prometheus                 ClusterIP   10.0.152.193   <none>     ClusterIP   None9090/TCP           <none>        9093/TCP,9094/TCP,9094/UDP   30m
kube-prometheus-stack-alertmanager            -prometheus-node-exporter   ClusterIP   10.0.92216.245169    <none>        90939100/TCP                     30m
kube-prometheus-stack-grafanaoperated                    ClusterIP   10.0.240.51    <none>   ClusterIP   None  80/TCP         <none>        9090/TCP      30m
kube-prometheus-stack-kube-state-metrics         ClusterIP   10.0.47.252    <none>        8080/TCP    30m

sansae@win10pro-worksp:$ kubectl port-forward service/prometheus-operated 9090 -n monitor-po
Forwarding from 127.0.0.1:9090 -> 9090
Forwarding from [::1]:9090 -> 9090

Image Added

06-02. Grafana

Code Block
sansae@win10pro-worksp:$ kubectl   30m
port-forward service/kube-prometheus-stack-operatorgrafana 8000:80 -n monitor-po
Forwarding                ClusterIP   10from 127.0.2150.2431:8000 -> 3000
Forwarding from [::1]:8000 -> 3000
Handling connection for 8000
  • default user/password is admin/prom-operator

Image Added

06-03. AlertManager

Code Block
sansae@win10pro-worksp:$ kubectl port-forward service/  <none>        443/TCP                      30m
kube-prometheus-stack-prometheusalertmanager                 ClusterIP   10.0.152.193   <none>        9090/TCP                     30m
kube-prometheus-stack-prometheus-node-exporter   ClusterIP   10.0.216.169   <none>        9100/TCP                     30m
prometheus-operated                              ClusterIP   None           <none>        9090/TCP                     30m

sansae@win10pro-worksp:$ kubectl port-forward service/prometheus-operated 9090 -n monitor-po
Forwarding from 127.0.0.1:9090 -> 9090
Forwarding from [::1]:9090 -> 9090

Image Removed

04-02. Grafana

Code Block
sansae@win10pro-worksp:$ kubectl port-forward service/kube-prometheus-stack-grafana 8000:80 -n monitor-po
Forwarding from 127.0.0.1:8000 -> 3000
Forwarding from [::1]:8000 -> 3000
Handling connection for 8000
  • default user/password is admin/prom-operator

Image Removed

04-03. AlertManager

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
9093:9093 -n monitor-po
Forwarding from 127.0.0.1:9093 -> 9093
Forwarding from [::1]:9093 -> 9093

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

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 kube-prometheus-stack-admission


참조:

Info

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

...