Backup of Kibana with a Cronjob

What is a cronjob?

CronJob is a periodic job creator. It is designed to execute regular scheduled actions such as backups, report generation, etc. It periodically executes a job according to a given schedule, written in Cron format. It periodically executes a job according to a given schedule, written in Cron format.

Persistent Volume & Persistent Volume Claim

• Before deploying our cronjob, we first need to prepare the ground by deploying a Persistent Volume and a Persistent Volume Claim. These will enable us to link our backup folder and our storage account.

1. Here’s the first yaml we’ll call fileshare-pv.yaml, which will be the Persistent Volume. :

apiVersion: v1
kind: PersistentVolume
metadata:
  annotations:
    pv.kubernetes.io/provisioned-by: file.csi.azure.com
  name: azurefilekibana
  namespace: <namespace-ou-est-déployé-kibana>
spec:
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  storageClassName: azurefile-csi
  csi:
    driver: file.csi.azure.com
    readOnly: false
    volumeHandle: unique-volumeid
    volumeAttributes:
      resourceGroup:
      shareName:
    nodeStageSecretRef:
      name: azure-secret
      namespace: <namespace-ou-est-déployé-kibana>
  mountOptions:
    - dir_mode=0777
    - file_mode=0777
    - uid=0
    - gid=0
    - mfsymlinks
    - cache=strict
    - nosharesock
    - nobrl

2. The second yaml, called fileshare-pvc.yaml, will be the Persistent Volume Claim. :

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: azurefilekibana
  namespace: <namespace-ou-est-déployé-kibana>
spec:
  accessModes:
    - ReadWriteMany
  storageClassName: azurefile-csi
  resources:
    requests:
      storage: 10Gi

3. And the last yaml will be the one containing the credentials to be able to link to our storage account, we will name it fileshare-secret.yaml :

apiVersion: v1
kind: Secret
metadata:
  name: azure-secret
  namespace: es
type: Opaque
data:
  azurestorageaccountkey: # must be encoded in base64
  azurestorageaccountname: # must be encoded in base64

To retrieve the azurestorageaccountkey, go to portal, then storage account, and finally Access keys.

Cronjob

• For our cronjob to work, it will need 3 components:

1. the dockerconfigjson which will be used to pull the docker image we’ve created and pushed into the azure container registry