additional longhorn docu

README.md

@@ -10,6 +10,8 @@
   * [Rancher Local (k3s default)](#pv-local)
   * [NFS](#pv-nfs)
   * [Rancher Longhorn (distributed in local cluster) - MY FAVOURITE :-)](#pv-longhorn)
+    * [Custom StorageClass](#pv-longhorn-custom-storageclass)
+    * [Volume backups with S3 (compatible) storage](#pv-longhorn-s3-backup)
 * [Ingress controller](#ingress-controller)
   * [Disable Traefik-ingress](#disable-traefik-ingress)
   * [Enable NGINX-ingress with OCSP stapling](#enable-nginx-ingress)
@@ -214,6 +216,57 @@ spec:
   * Debian: `apt install open-iscsi`
 * Install: https://rancher.com/docs/k3s/latest/en/storage/
 
+### Custom StorageClass <a name="user-content-pv-longhorn-custom-storageclass"></a>
+The following storageClass `longhorn-2r` will define 2 `replicas`, no `dataLocality` and EXT4 as filesystem:
+```
+allowVolumeExpansion: true
+apiVersion: storage.k8s.io/v1
+kind: StorageClass
+metadata:
+  annotations:
+    longhorn.io/last-applied-configmap: |
+      kind: StorageClass
+      apiVersion: storage.k8s.io/v1
+      metadata:
+        name: longhorn-2r
+        annotations:
+          storageclass.kubernetes.io/is-default-class: "true"
+      provisioner: driver.longhorn.io
+      allowVolumeExpansion: true
+      reclaimPolicy: "Delete"
+      volumeBindingMode: Immediate
+      parameters:
+        numberOfReplicas: "2"
+        staleReplicaTimeout: "30"
+        fromBackup: ""
+        fsType: "ext4"
+        dataLocality: "disabled"
+    storageclass.kubernetes.io/is-default-class: "true"
+  name: longhorn-2r
+parameters:
+  fromBackup: ""
+  fsType: ext4
+  numberOfReplicas: "2"
+  staleReplicaTimeout: "30"
+  dataLocality: "disabled"
+provisioner: driver.longhorn.io
+reclaimPolicy: Delete
+volumeBindingMode: Immediate
+```
+### Volume backups with S3 (compatible) storage <a name="user-content-pv-longhorn-s3-backup"></a>
+If you do not want to expose your volume backups to public cloud (e.g. AWS), you need to provide a local S3 storage server. This can be easily done with [minio](https://longhorn.io/docs/1.2.2/snapshots-and-backups/backup-and-restore/set-backup-target/#set-up-a-local-testing-backupstore):
+```
+apiVersion: v1
+kind: Secret
+metadata:
+  name: s3-backup-secret
+  namespace: longhorn-system
+type: Opaque
+data:
+  AWS_ACCESS_KEY_ID: bG9uZ2hvcm4= # Base64: <THE access key ID>
+  AWS_SECRET_ACCESS_KEY: Qmx1YmIxMjM0IQ== # Base64: <THE acces key secret>
+  AWS_ENDPOINTS: aHR0cHM6Ly95b3VyLnMzLmVuZHBvaW50 # Base64: <https://your.s3.endpoint>
+```
 
 # Ingress controller <a name="user-content-ingress-controller"></a>
 ## Disable Traefik-ingress <a name="user-content-disable-traefik-ingress"></a>