feat(mastodon): Use operator-based redis cluster

This patch adjust the base deployment of mastodon to use a
redis-operator based setup of redis, which should reduce potential
Single-Points-Of-Failure keeping all redis-based operations nice and HA.

apps/base/mastodon/kustomization.yaml

@@ -6,9 +6,11 @@ resources:
   - ca.yaml
   - release.yaml
   - database.yaml
+  - redis.yaml
   - ../../../shared/networkpolicies/allow-from-same-namespace.yaml
   - ../../../shared/networkpolicies/allow-from-ingress.yaml
   - ../../../shared/networkpolicies/allow-from-database.yaml
   - ../../../shared/networkpolicies/allow-from-monitoring.yaml
+  - ../../../shared/networkpolicies/allow-from-redis.yaml
 patchesStrategicMerge:
   - networkpolicy.yaml

apps/base/mastodon/redis.yaml

+apiVersion: databases.spotahome.com/v1
+kind: RedisFailover
+metadata:
+  name: mastodon-redis
+  namespace: mastodon
+spec:
+  sentinel:
+    replicas: 3
+    resources:
+      requests:
+        cpu: 100m
+        memory: 128Mi
+      limits:
+        cpu: 200m
+        memory: 256Mi
+  redis:
+    replicas: 3
+    resources:
+      requests:
+        memory: 128Mi
+        cpu: 100m
+      limits:
+        memory: 256Mi
+        cpu: 200m

apps/base/mastodon/release.yaml

@@ -160,20 +160,7 @@ data:
     ingress:
       enabled: false
     redis:
-      master:
-        resources:
-          limits:
-            cpu: 100m
-            memory: 128Mi
-          requests:
-            cpu: 100m
-            memory: 128Mi
-      replica:
-        replicaCount: 1
-        resources:
-          limits:
-            cpu: 100m
-            memory: 128Mi
-          requests:
-            cpu: 100m
-            memory: 128Mi
+      enabled: false
+      redisUrl: redis+sentianal://rfs-mastodon-redis:26379/mymaster
+      auth:
+        enabled: false