[Helm] grafana 설치하기

• 사전 준비

kubectl, minikube, docker desktop 사전 설치 필요

 

• Grafana 설치

1. https://artifacthub.io/ 접속
2. grafana 검색
3. grafana (Grafana) 클릭
4. Helm repo 추가

helm repo add {Repo Name} https://grafana.github.io/helm-charts
helm repo update

5. Repo Name 'grafana'로 설치하면 아래와 같은 설치 내용이 나온다.

"grafana" has been added to your repositories

6. 아래 명령어로 설치: Release Name은 개인적으로 설정

helm install {Release Name} grafana/grafana

7. Release Name 'my-grafana' 설치하면 아래와 같은 설치 내용이 나온다. (helm status {Release Name}으로 확인 가능)

NAME: my-grafana
LAST DEPLOYED: Sat Apr 29 17:47:23 2023
NAMESPACE: default
STATUS: deployed
REVISION: 1
NOTES:
1. Get your 'admin' user password by running:

   kubectl get secret --namespace default my-grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo


2. The Grafana server can be accessed via port 80 on the following DNS name from within your cluster:

   my-grafana.default.svc.cluster.local

   Get the Grafana URL to visit by running these commands in the same shell:
     export POD_NAME=$(kubectl get pods --namespace default -l "app.kubernetes.io/name=grafana,app.kubernetes.io/instance=my-grafana" -o jsonpath="{.items[0].metadata.name}")
     kubectl --namespace default port-forward $POD_NAME 3000

3. Login with the password from step 1 and the username: admin
#################################################################################
######   WARNING: Persistence is disabled!!! You will lose your data when   #####
######            the Grafana pod is terminated.                            #####
#################################################################################

8. kubectl get all 입력해보면 아래와 같이 service 및 pod가 실행되어 있는 것을 확인할 수 있다.

NAME                              READY   STATUS    RESTARTS   AGE
pod/my-grafana-6b4558754f-frdzh   1/1     Running   0          2m33s

NAME                                TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
service/kubernetes                  ClusterIP   10.96.0.1       <none>        443/TCP    8d
service/my-grafana                  ClusterIP   10.96.17.250    <none>        80/TCP     2m33s

NAME                         READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/my-grafana   1/1     1            1           2m33s

NAME                                    DESIRED   CURRENT   READY   AGE
replicaset.apps/my-grafana-6b4558754f   1         1         1       2m33s

9. 하지만, Grafana 서비스 접속을 위한 설정 변경이 필요하다. Helm Chart를 통해 변경한다.

git clone https://github.com/grafana/helm-charts.git
cd helm-charts/charts/grafana
vi values.yaml

10. 비밀번호 변경

# Administrator credentials when not using an existing secret (see below)
adminUser: admin
adminPassword: admin

11. Warning 이슈(PV) 해결

NAME: my-grafana
LAST DEPLOYED: Sat Apr 29 17:47:23 2023
NAMESPACE: default
STATUS: deployed
REVISION: 1
NOTES:
1. Get your 'admin' user password by running:

   kubectl get secret --namespace default my-grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo


2. The Grafana server can be accessed via port 80 on the following DNS name from within your cluster:

   my-grafana.default.svc.cluster.local

   Get the Grafana URL to visit by running these commands in the same shell:
     export POD_NAME=$(kubectl get pods --namespace default -l "app.kubernetes.io/name=grafana,app.kubernetes.io/instance=my-grafana" -o jsonpath="{.items[0].metadata.name}")
     kubectl --namespace default port-forward $POD_NAME 3000

3. Login with the password from step 1 and the username: admin
#################################################################################
######   WARNING: Persistence is disabled!!! You will lose your data when   #####
######            the Grafana pod is terminated.                            #####
#################################################################################

## Enable persistence using Persistent Volume Claims
## ref: http://kubernetes.io/docs/user-guide/persistent-volumes/
##
persistence:
  type: pvc
  enabled: true
  # storageClassName: default
  accessModes:
    - ReadWriteOnce

12. values.yaml 수정 완료
13. 해당 values.yaml 파일로 my-grafana를 업그레이드 해야한다.

helm upgrade my-grafana grafana/grafana -f values.yaml

14. 업그레이드 후 아래와 같은 내용이 나온다.

• 업그레이드가 성공적으로 마무리된 것을 확인할 수 있다.
  REVISION: 2로 변경되었고, Warning 또한 사라졌다.

Release "my-grafana" has been upgraded. Happy Helming!
NAME: my-grafana
LAST DEPLOYED: Sat Apr 29 18:18:22 2023
NAMESPACE: default
STATUS: deployed
REVISION: 2
NOTES:
1. Get your 'admin' user password by running:

   kubectl get secret --namespace default my-grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo


2. The Grafana server can be accessed via port 80 on the following DNS name from within your cluster:

   my-grafana.default.svc.cluster.local

   Get the Grafana URL to visit by running these commands in the same shell:
     export NODE_PORT=$(kubectl get --namespace default -o jsonpath="{.spec.ports[0].nodePort}" services my-grafana)
     export NODE_IP=$(kubectl get nodes --namespace default -o jsonpath="{.items[0].status.addresses[0].address}")
     echo http://$NODE_IP:$NODE_PORT

3. Login with the password from step 1 and the username: admin

helm history my-grafana

REVISION	UPDATED                 	STATUS    	CHART         	APP VERSION	DESCRIPTION     
1       	Sat Apr 29 17:47:23 2023	superseded	grafana-6.56.1	9.5.1      	Install complete
2       	Sat Apr 29 18:18:22 2023	deployed  	grafana-6.56.1	9.5.1      	Upgrade complete

# 비밀번호 변경 확인
kubectl get secret --namespace default my-grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo

15.  포트포워딩 설정

kubectl port-forward --namespace default svc/my-grafana 3000:80

16. Web UI 접속

http://localhost:3000/login