Merge pull request #456 from netgroup-polito/mio/kubedb

infrastructure/file-sharing/README.md

@@ -15,11 +15,17 @@ We can significantly improve our Nextcloud server performance with memory cachin
 Having multiple Nextcloud server instances a memory caching is indispensable in order to prevent conflicts when same file is requested by different users at the same time.
 
 **Redis** is an excellent modern memcache to use for distributed caching, and as a key-value store for Transactional File Locking because it guarantees that cached objects are available for as long as they are needed.
-To run a Redis cluster we need the [KubeDB Operator](https://kubedb.com). We can install it with a bash script or Helm. To keep it quick’n’easy we’ll use their bash script for that:
+
+To run a Redis cluster we need the [KubeDB Operator](https://kubedb.com), which can be installed using Helm after having obtained a [licence for the community edition](https://license-issuer.appscode.com/):
+
 ```bash
-curl -fsSL https://github.com/kubedb/installer/raw/v0.13.0-rc.0/deploy/kubedb.sh | bash -s -- --namespace=kubedb
+helm repo add appscode https://charts.appscode.com/stable/
+helm repo update
+helm install --create-namespace -namespace kubedb kubedb appscode/kubedb \
+  --values=manifests/kubedb-values.yaml\
+  --version v2021.04.16 \
+  --set-file global.license=<license-file>
 ```
-Here we decided to deploy the KubeDb Operator in a namespace called **kubedb**
 
 Then we install **redis** applying the [nextcloud-redis-cluster-manifest.yaml](manifests/nextcloud-redis-cluster-manifest.yaml):
 ```bash

infrastructure/file-sharing/manifests/kubedb-values.yaml

@@ -0,0 +1,48 @@
+# Default values for kubedb.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+global:
+  # License for the product.
+  # Get a license by following the steps from [here](https://kubedb.com/docs/latest/setup/install/enterprise#get-a-trial-license).
+  # Example:
+  # helm install appscode/kubedb \
+  #   --set-file global.license=/path/to/license/file
+  # or
+  # helm install appscode/kubedb \
+  #   --set global.license=<license file content>
+  license: ""
+
+  # Docker registry used to pull KubeDB related images
+  registry: ""
+
+  # Docker registry fqdn used to pull KubeDB related images.
+  # Set this to use docker registry hosted at ${registryFQDN}/${registry}/${image}
+  registryFQDN: ""
+
+  # Specify an array of imagePullSecrets.
+  # Secrets must be manually created in the namespace.
+  #
+  # Example:
+  # helm template charts/kubedb \
+  #   --set global.imagePullSecrets[0].name=sec0 \
+  #   --set global.imagePullSecrets[1].name=sec1
+  imagePullSecrets: []
+
+  # Skip generating cleaner job YAML
+  skipCleaner: false
+
+kubedb-catalog:
+  # If enabled, installs the kubedb-catalog chart
+  enabled: true
+kubedb-community:
+  # If enabled, installs the kubedb-community chart
+  enabled: true
+  enableAnalytics: false
+kubedb-enterprise:
+  # If enabled, installs the kubedb-enterprise chart
+  enabled: false
+kubedb-autoscaler:
+  # If enabled, installs the kubedb-autoscaler chart
+  enabled: false
+

infrastructure/file-sharing/manifests/nextcloud-redis-cluster-manifest.yaml

@@ -6,39 +6,69 @@ metadata:
     app.kubernetes.io/part-of: nextcloud
   name: redis-nextcloud
 spec:
-  version: "5.0.3-v1"
-  mode: Standalone
   cluster:
     master: 1
     replicas: 3
-  storage:
-    storageClassName: "rook-ceph-block"
-    accessModes:
-    - ReadWriteOnce
-    resources:
-      requests:
-        storage: 250Mi
+  configSecret:
+    name: redis-nextcloud
+  mode: Standalone
+  monitor:
+    agent: prometheus.io/operator
+    prometheus:
+      exporter:
+        port: 56790
+      serviceMonitor:
+        interval: 10s
+        labels:
+          app: kubedb
   podTemplate:
     spec:
+      affinity:
+        podAntiAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+          - podAffinityTerm:
+              labelSelector:
+                matchLabels:
+                  app.kubernetes.io/instance: redis-nextcloud
+                  app.kubernetes.io/managed-by: kubedb.com
+                  app.kubernetes.io/name: redises.kubedb.com
+              namespaces:
+              - nextcloud
+              topologyKey: kubernetes.io/hostname
+            weight: 100
+          - podAffinityTerm:
+              labelSelector:
+                matchLabels:
+                  app.kubernetes.io/instance: redis-nextcloud
+                  app.kubernetes.io/managed-by: kubedb.com
+                  app.kubernetes.io/name: redises.kubedb.com
+              namespaces:
+              - nextcloud
+              topologyKey: failure-domain.beta.kubernetes.io/zone
+            weight: 50
       resources:
-        requests:
-          memory: "128Mi"
-          cpu: "250m"
         limits:
-          memory: "256Mi"
-          cpu: "500m"
-  serviceTemplate:
+          cpu: 500m
+          memory: 256Mi
+        requests:
+          cpu: 250m
+          memory: 128Mi
+      serviceAccountName: redis-nextcloud
+  replicas: 1
+  serviceTemplates:
+  - alias: primary
     spec:
-      type: ClusterIP
       ports:
       - name: http
         port: 9200
-        targetPort: http
-        terminationPolicy: WipeOut
-  updateStrategy:
-    type: RollingUpdate
-  monitor:
-    agent: prometheus.io/coreos-operator
-    prometheus:
-      namespace: monitoring
-      interval: 10s
+      type: ClusterIP
+  storage:
+    accessModes:
+    - ReadWriteOnce
+    resources:
+      requests:
+        storage: 250Mi
+    storageClassName: rook-ceph-block
+  storageType: Durable
+  terminationPolicy: Halt
+  version: 5.0.3-v1