add longhorn operator

k8s/operators/kustomization.yaml

@@ -1,5 +1,7 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
+  - longhorn
   - postgres-operator
   - cert-manager
+  - kube-prometheus

k8s/operators/longhorn/backup.yaml

@@ -0,0 +1,12 @@
+apiVersion: longhorn.io/v1beta2
+kind: RecurringJob
+metadata:
+  name: backup-nightly
+  namespace: longhorn-system
+spec:
+  concurrency: 1
+  cron: '0 0 * * *'
+  groups: [default]
+  name: backup-nightly
+  retain: 2
+  task: backup

k8s/operators/longhorn/config.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: longhorn-default-setting
+  labels:
+    app.kubernetes.io/name: longhorn
+    app.kubernetes.io/instance: longhorn
+    app.kubernetes.io/version: v1.6.0
+data:
+  default-setting.yaml: |- # reference: https://longhorn.io/docs/1.6.2/advanced-resources/deploy/customizing-default-settings/#using-the-longhorn-deployment-yaml-file
+    backup-target: s3://k8s-volume-backups@us-sea-1/k8s-volume-backups
+    priority-class: longhorn-critical
+    backup-target-credential-secret: minio-backup-credentials
+    concurrent-automatic-engine-upgrade-per-node-limit: 1

k8s/operators/longhorn/kustomization.yaml

@@ -0,0 +1,10 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: longhorn-system
+resources:
+  - namespace.yaml
+  - config.yaml
+  - longhorn.yaml
+  - secrets.yaml
+  - storage-class.yaml
+  - backup.yaml

k8s/operators/longhorn/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: longhorn-system

k8s/operators/longhorn/storage-class.yaml

@@ -0,0 +1,28 @@
+kind: StorageClass
+apiVersion: storage.k8s.io/v1
+metadata:
+  name: longhorn
+provisioner: driver.longhorn.io
+allowVolumeExpansion: true
+parameters:
+  numberOfReplicas: "1"
+  staleReplicaTimeout: "2880" # 48 hours in minutes
+  fromBackup: ""
+  recurringJobs: |
+    [
+      {
+        "name":"snap",
+        "task":"snapshot",
+        "cron":"*/1 * * * *",
+        "retain":1
+      },
+      {
+        "name":"backup",
+        "task":"backup",
+        "cron":"*/2 * * * *",
+        "retain":1,
+        "labels": {
+          "interval":"2m"
+        }
+      }
+    ]