Add extravolumes and extravolumemounts

README.md

@@ -163,6 +163,37 @@ app.kubernetes.io/part-of
 redisfailovers.databases.spotahome.com/name
 ```
 
+
+### ExtraVolumes and ExtraVolumeMounts
+
+If the user choose to have extra volumes creates and mounted, he could use the `extraVolumes` and `extraVolumeMounts`, in `spec.redis` of the CRD. This allows users to mount the extra configurations, or secrets to be used. A typical use case for this might be
+- Secrets that sidecars might use to backup of RDBs
+- Extra users and their secrets and acls that could used the initContainers to create multiple users
+- Extra Configurations that could merge on top the existing configurations
+
+```
+apiVersion: databases.spotahome.com/v1
+kind: RedisFailover
+metadata:
+  name: redisfailover
+spec:
+  sentinel:
+    replicas: 3
+  redis:
+    replicas: 3
+    extraVolumes:
+    - name: foo_user
+      secret:
+        secretName: mysecret
+        optional: false
+    exraVolumeMounts:
+    - name: foo
+      mountPath: "/etc/foo"
+      readOnly: true
+```
+
+
+
 ## Connection to the created Redis Failovers
 
 In order to connect to the redis-failover and use it, a [Sentinel-ready](https://redis.io/topics/sentinel-clients) library has to be used. This will connect through the Sentinel service to the Redis node working as a master.

api/redisfailover/v1/types.go

@@ -64,6 +64,8 @@ type RedisSettings struct {
 	PriorityClassName             string                            `json:"priorityClassName,omitempty"`
 	ServiceAccountName            string                            `json:"serviceAccountName,omitempty"`
 	TerminationGracePeriodSeconds int64                             `json:"terminationGracePeriod,omitempty"`
+	ExtraVolumes                  []corev1.Volume                   `json:"extraVolumes,omitempty"`
+	ExtraVolumeMounts             []corev1.VolumeMount              `json:"extraVolumeMounts,omitempty"`
 }
 
 // SentinelSettings defines the specification of the sentinel cluster

example/redisfailover/extravolumes-mounts.yaml

+apiVersion: databases.spotahome.com/v1
+kind: RedisFailover
+metadata:
+  name: redisfailover
+spec:
+  sentinel:
+    replicas: 3
+  redis:
+    replicas: 3
+    extraVolumes:
+    - name: foo_user
+      secret:
+        secretName: mysecret
+        optional: false
+    exraVolumeMounts:
+    - name: foo
+      mountPath: "/etc/foo"
+      readOnly: true
\ No newline at end of file

operator/redisfailover/service/generator.go

@@ -781,6 +781,10 @@ func getRedisVolumeMounts(rf *redisfailoverv1.RedisFailover) []corev1.VolumeMoun
 		},
 	}
 
+	if rf.Spec.Redis.ExtraVolumeMounts != nil {
+		volumeMounts = append(volumeMounts, rf.Spec.Redis.ExtraVolumeMounts...)
+	}
+
 	return volumeMounts
 }
 
@@ -830,6 +834,10 @@ func getRedisVolumes(rf *redisfailoverv1.RedisFailover) []corev1.Volume {
 		volumes = append(volumes, *dataVolume)
 	}
 
+	if rf.Spec.Redis.ExtraVolumes != nil {
+		volumes = append(volumes, rf.Spec.Redis.ExtraVolumes...)
+	}
+
 	return volumes
 }