NOTE: This is an alpha-status project. We do regular tests on the code and functionality, but we can not assure a production-ready stability.
Redis Operator creates/configures/manages redis-failovers atop Kubernetes.
Redis Operator is meant to be run on Kubernetes 1.8+. All dependecies have been vendored, so there's no need to any additional download.
The image versions deployed by the operator can be found on the constants file for the RedisFailover service.
In order to create Redis failovers inside a Kubernetes cluster, the operator has to be deployed. It can be done with a deployment or with the provided Helm chart.
To create the operator, you can directly create it with kubectl:
kubectl create -f https://raw.githubusercontent.com/spotahome/redis-operator/master/example/operator.yaml
This will create a deployment named redisoperator.
From the root folder of the project, execute the following:
helm install --name redisfailover charts/redisoperator
Once the operator is deployed inside a Kubernetes cluster, a new API will be accesible, so you'll be able to create, update and delete redisfailovers.
In order to deploy a new redis-failover a specification has to be created:
kubectl create -f https://raw.githubusercontent.com/spotahome/redis-operator/master/redisfailover/all-options.yaml
This redis-failover will be managed by the operator, resulting in the following elements created inside Kubernetes:
rfr-<NAME>: Redis configmaprfr-<NAME>: Redis statefulsetrfr-<NAME>: Redis service (if redis-exporter is enabled)rfs-<NAME>: Sentinel configmaprfs-<NAME>: Sentinel deploymentrfs-<NAME>: Sentinel service
NOTE: NAME is the named provided when creating the RedisFailover.
The operator has the ability of add persistance to Redis data. By default an emptyDir will be used, so the data is not saved.
In order to have persistance, a PersistentVolumeClaim usage is allowed. The full PVC definition has to be added to the Redis Failover Spec under the Storage section.
IMPORTANT: By default, the persistent volume claims will be deleted when the Redis Failover is. If this is not the expected usage, a keepAfterDeletion flag can be added under the storage section of Redis. An example is given.
In order to connect to the redis-failover and use it, a Sentinel-ready library has to be used. This will connect through the Sentinel service to the Redis node working as a master. The connection parameters are the following:
url: rfs-<NAME>
port: 26379
master-name: mymaster
If you want to delete the operator from your Kubernetes cluster, the operator deployment should be deleted.
Also, the CRD has to be deleted too:
kubectl delete crd redisfailovers.storage.spotahome.com
For the code documentation, you can lookup on the GoDoc.
Also, you can check more deeply information on the docs folder.