[installer]: add backup command for in-cluster minio

Author: Simon Emms

install/installer/cmd/testdata/render/backup-labels/output.golden

@@ -8159,6 +8159,7 @@ spec:
         kots.io/backup: velero
       annotations:
         checksum/credentials-secret: 254e39ef7087b8d977946ed0027240eda9a1c7f64ae430fca5644a50b23cece3
+        backup.velero.io/backup-volumes: data
     spec:
 
       serviceAccountName: minio

install/installer/cmd/testdata/render/customization/output.golden

@@ -8535,6 +8535,7 @@ spec:
         hello: world
       annotations:
         checksum/credentials-secret: 254e39ef7087b8d977946ed0027240eda9a1c7f64ae430fca5644a50b23cece3
+        backup.velero.io/backup-volumes: data
         hello: world
     spec:
 

install/installer/cmd/testdata/render/external-registry/output.golden

@@ -7822,6 +7822,7 @@ spec:
         app.kubernetes.io/managed-by: Helm
       annotations:
         checksum/credentials-secret: 254e39ef7087b8d977946ed0027240eda9a1c7f64ae430fca5644a50b23cece3
+        backup.velero.io/backup-volumes: data
     spec:
 
       serviceAccountName: minio

install/installer/cmd/testdata/render/minimal/output.golden

@@ -8102,6 +8102,7 @@ spec:
         app.kubernetes.io/managed-by: Helm
       annotations:
         checksum/credentials-secret: 254e39ef7087b8d977946ed0027240eda9a1c7f64ae430fca5644a50b23cece3
+        backup.velero.io/backup-volumes: data
     spec:
 
       serviceAccountName: minio

install/installer/cmd/testdata/render/statefulset-customization/output.golden

@@ -8116,6 +8116,7 @@ spec:
         app.kubernetes.io/managed-by: Helm
       annotations:
         checksum/credentials-secret: 254e39ef7087b8d977946ed0027240eda9a1c7f64ae430fca5644a50b23cece3
+        backup.velero.io/backup-volumes: data
     spec:
 
       serviceAccountName: minio

install/installer/pkg/components/minio/incluster/minio.go

@@ -6,6 +6,7 @@ package incluster
 
 import (
 	"fmt"
+
 	"github.com/gitpod-io/gitpod/installer/pkg/cluster"
 	"github.com/gitpod-io/gitpod/installer/pkg/common"
 	"github.com/gitpod-io/gitpod/installer/pkg/helm"
@@ -35,6 +36,9 @@ var Helm = func(apiPort int32, consolePort int32, commonHelmValues []string) com
 							helm.KeyValue("minio.auth.rootPassword", cfg.Values.StorageSecretKey),
 							helm.KeyValue("minio.service.ports.api", fmt.Sprintf("%d", apiPort)),
 							helm.KeyValue("minio.service.ports.console", fmt.Sprintf("%d", consolePort)),
+
+							// Backup the volume
+							helm.KeyValue("minio.podAnnotations.backup\\.velero\\.io/backup-volumes", "data"),
 						},
 						commonHelmValues...,
 					),