[stable/influxdb] Add support for Azure to backup job (#16722)

stable/influxdb/Chart.yaml

 apiVersion: v1
 name: influxdb
-version: 1.3.4
+version: 1.4.0
 appVersion: 1.7.6
 description: Scalable datastore for metrics, events, and real-time analytics.
 keywords:

stable/influxdb/templates/backup-cronjob.yaml

@@ -25,12 +25,14 @@ spec:
           volumes:
           - name: backups
             emptyDir: {}
+          {{- if and .Values.backup.gcs }}
           - name: google-cloud-key
             secret:
               secretName: {{ .Values.backup.gcs.serviceAccountSecret | quote }}
+          {{- end }}
           initContainers:
           - name: influxdb-backup
-            image: "{{ .Values.image.repo }}:{{ .Values.image.tag }}"
+            image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
             volumeMounts:
             - name: backups
               mountPath: /backups
@@ -41,6 +43,7 @@ spec:
             - |
               influxd backup -host {{ template "influxdb.fullname" . }}.{{ .Release.Namespace }}.svc:{{ .Values.config.rpc.bind_address }} -portable /backups/backup_$(date +%Y%m%d_%H%M%S)
           containers:
+          {{- if .Values.backup.gcs}}
           - name: gsutil-cp
             image: google/cloud-sdk:alpine
             command:
@@ -59,7 +62,34 @@ spec:
               - name: SRC_URL
                 value: /backups
               - name: DST_URL
-                value: {{ .Values.backup.destination}}
+                value: {{ .Values.gcs.backup.destination}}
               - name: KEY_FILE
                 value: /var/secrets/google/key.json
+          {{- end }}
+          {{- if .Values.backup.azure }}
+          - name: azure-cli
+            image: microsoft/azure-cli
+            command:
+            - /bin/sh
+            args:
+            - '-c'
+            - |
+              az storage container create --name "$DST_CONTAINER"
+              az storage blob upload-batch --destination "$DST_CONTAINER" --destination-path "$DST_PATH" --source "$SRC_URL"
+            volumeMounts:
+            - name: backups
+              mountPath: /backups
+            env:
+              - name: SRC_URL
+                value: /backups
+              - name: DST_CONTAINER
+                value: {{ .Values.backup.azure.destination_container }}
+              - name: DST_PATH
+                value: {{ .Values.backup.azure.destination_path }}
+              - name: AZURE_STORAGE_CONNECTION_STRING
+                valueFrom:
+                  secretKeyRef:
+                    name: {{ .Values.backup.azure.storageAccountSecret }}
+                    key: connection-string
+          {{- end }}
 {{- end }}

stable/influxdb/values.yaml

@@ -280,7 +280,17 @@ backup:
   enabled: false
   schedule: "0 0 * * *"
   annotations: {}
-  destination: gs://bucket/influxdb
-  # Google Cloud Storage
-  gcs:
-    serviceAccountSecret: influxdb-backup-key
+
+  ## Google Cloud Storage
+  ## Secret is expected to have key stored in `key.json` field
+  # gcs:
+  #    serviceAccountSecret: influxdb-backup-key
+  #    destination: gs://bucket/influxdb
+
+  ## Azure
+  ## Secret is expected to have connection string stored in `connection-string` field
+  ## Existing container will be used or private one withing storage account will be created.
+  # azure:
+  #   storageAccountSecret: influxdb-backup-azure-key
+  #   destination_container: influxdb-container
+  #   destination_path: ""