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Quickstart

This tutorial takes you from an installed Momento Valkey Operator to a running, connected, scaled Valkey cluster. It assumes you have completed Installation and have cluster-admin access to the Kubernetes cluster, and it takes roughly 15 to 20 minutes.

注記

This tutorial has you play both personas. Steps 1 and 2 (registering an image and a config) are platform-team work: curating what teams are allowed to run. Step 3 onward is product-team work: provisioning and using a cluster from that menu. In production these are separated by RBAC; see Resource model and Multi-tenancy and RBAC.

1. Register a Valkey image​

ValkeyImage is the allowlist of container images clusters are permitted to run. Register Valkey 9.0.0:

kubectl apply -f - <<'EOF'
apiVersion: valkey.gomomento.com/v1alpha1
kind: ValkeyImage
metadata:
  name: valkey-9-0
spec:
  repository: valkey/valkey
  tag: "9.0.0"
  version: "9.0.0"
EOF
kubectl get valkeyimage valkey-9-0

2. Create a config​

ValkeyConfig bundles an image reference, resource sizing, and Valkey settings into a named profile that clusters reference by name. Create a profile called standard:

kubectl apply -f - <<'EOF'
apiVersion: valkey.gomomento.com/v1alpha1
kind: ValkeyConfig
metadata:
  name: standard
spec:
  imageRef: valkey-9-0
  resources:
    cpu: "1"
    memory: 2Gi
  valkey:
    maxmemory: "1500mb"
    maxmemory-policy: "allkeys-lru"
EOF
kubectl get valkeyconfig standard

3. Provision a cluster​

Create the namespace your application lives in, then a ValkeyCluster inside it, referencing the standard config:

kubectl create namespace my-app
kubectl apply -f - <<'EOF'
apiVersion: valkey.gomomento.com/v1alpha1
kind: ValkeyCluster
metadata:
  name: my-cluster
  namespace: my-app
spec:
  configRef: standard
  shards: 3
  replicasPerShard: 1
EOF

4. Watch it come up​

kubectl -n my-app get valkeycluster -w

The STATE column starts at Creating. Bootstrapping a three-shard, one-replica-per-shard cluster means bringing up six Valkey nodes (shards × (1 + replicasPerShard)), meeting them into a cluster, and assigning hash slots. Once that finishes, STATE flips to Active. Press Ctrl+C to stop watching. (Creating and Active are two of several states a ValkeyCluster can report; see Cluster status for the full set and what each means.)

While it converges (or once it's Active), look at what the operator built. Each Valkey cluster member is represented by a ValkeyNode, and each ValkeyNode owns exactly one pod:

kubectl -n my-app get valkeynodes
kubectl -n my-app get pods -l app.kubernetes.io/instance=my-cluster

You should see six ValkeyNode resources, each with a random-suffixed name like my-cluster-1a4f2, and a matching pod for each (not ordinal names like my-cluster-0), because the operator manages pods directly rather than through a StatefulSet.

5. Connect and run some commands​

The operator creates one headless Service per cluster, named after the cluster, reachable at {cluster}.{namespace}.svc.cluster.local. Run valkey-cli from a throwaway pod inside the Kubernetes cluster, in cluster mode (-c, so the client follows slot redirects across nodes):

kubectl -n my-app run valkey-cli --rm -it --restart=Never \
  --image valkey/valkey:9.0 \
  -- valkey-cli -c -h my-cluster.my-app.svc.cluster.local

At the prompt:

my-cluster.my-app.svc.cluster.local:6379> PING
PONG
my-cluster.my-app.svc.cluster.local:6379> SET hello world
OK
my-cluster.my-app.svc.cluster.local:6379> GET hello
"world"

Exit with exit or Ctrl+D; the --rm flag deletes the pod on exit.

6. Scale out a shard​

Increase shards from 3 to 4:

kubectl -n my-app patch valkeycluster my-cluster \
  --type merge -p '{"spec": {"shards": 4}}'

Watch it again:

kubectl -n my-app get valkeycluster -w

STATE stays Active throughout (scaling is a live operation, not a separate state), and the SHARDS column shows the updated desired count immediately, since it reflects the spec. The real progress signal is the node list: the operator brings up the added shard's nodes and migrates a share of the existing hash slots onto them so all four shards end up balanced. Meanwhile, existing shards keep serving. Watch the nodes converge:

kubectl -n my-app get valkeynodes -w

Once four shards' worth of nodes are Active, confirm the updated node count:

kubectl -n my-app get valkeynodes

You should now see eight ValkeyNode resources (four shards × two nodes each).

7. Clean up​

Delete the cluster:

kubectl -n my-app delete valkeycluster my-cluster

This cascades: the Service, the auth Secret, the ACL ConfigMap, and every ValkeyNode (and its pod and ConfigMap) go with it. The namespace my-app, the standard ValkeyConfig, and the valkey-9-0 ValkeyImage are not deleted: they're independent, cluster-scoped (or, for the namespace, unrelated) resources, and stay available for the next cluster you provision.

Where to go next​

  • Platform engineers: build out a real menu in Curating images and configs, then onboard teams with Multi-tenancy and RBAC.
  • Product-team developers: read Provisioning a cluster for the decisions you make at creation time (TLS, placement, ACLs), and Connecting to a cluster for client configuration beyond valkey-cli.
  • Both personas: this cluster ran with no ACL bindings, so its default user was wide open to anything that could reach it on the network (fine for a quickstart, not for production). Read ACLs and TLS before going further.