content/operate/kubernetes/deployment/openshift/openshift-cli.md
Use these steps to set up a Redis Enterprise Software cluster with OpenShift.
To see which version of Redis Enterprise for Kubernetes supports your OpenShift version, see [Supported Kubernetes distributions]({{< relref "/operate/kubernetes/reference/supported_k8s_distributions" >}}).
{{<note>}} If you suspect your file descriptor limits are below 100,000, you must either manually increase limits or [Allow automatic resource adjustment]({{< relref "/operate/kubernetes/security/allow-resource-adjustment" >}}). Most major cloud providers and standard container runtime configurations set default file descriptor limits well above the minimum required by Redis Enterprise. In these environments, you can safely run without enabling automatic resource adjustment. {{</note>}}
Create a new project.
oc new-project <your-project-name>
Verify the newly created project.
oc project <your-project-name>
Get the deployment files.
git clone https://github.com/RedisLabs/redis-enterprise-k8s-docs
Deploy the OpenShift operator bundle.
If you are using version 6.2.18-41 or earlier, you must apply the security context constraint before the operator bundle.
oc apply -f openshift.bundle.yaml
{{< warning >}}
Changes to the openshift.bundle.yaml file can cause unexpected results.
{{< /warning >}}
Verify that your redis-enterprise-operator deployment is running.
oc get deployment
A typical response looks like this:
NAME READY UP-TO-DATE AVAILABLE AGE
redis-enterprise-operator 1/1 1 1 0m36s
{{<warning>}} DO NOT modify or delete the StatefulSet created during the deployment process. Doing so could destroy your Redis Enterprise cluster (REC). {{</warning>}}
Versions 7.22.0-6 and later run in without permissions to [allow automatic resource adjustment]({{< relref "/operate/kubernetes/security/allow-resource-adjustment" >}}). If you use the recommended default security constraints, remove the existing redis-enterprise-scc-v2 SCC and unbind it from the REC service account after upgrading.
Apply the RedisEnterpriseCluster resource file (rec_rhel.yaml).
You can rename the file to <your_cluster_name>.yaml, but it is not required. Examples below use <rec_rhel>.yaml. [Options for Redis Enterprise clusters]({{< relref "/operate/kubernetes/reference/api/redis_enterprise_cluster_api" >}}) has more info about the Redis Enterprise cluster (REC) custom resource, or see the [Redis Enterprise cluster API]({{<relref "/operate/kubernetes/reference/api/redis_enterprise_cluster_api">}}) for a full list of options.
{{<note>}} If you suspect your file descriptor limits are below 100,000, you must either manually increase limits or [Allow automatic resource adjustment]({{< relref "/operate/kubernetes/security/allow-resource-adjustment" >}}). Most major cloud providers and standard container runtime configurations set default file descriptor limits well above the minimum required by Redis Enterprise. In these environments, you can safely run without enabling automatic resource adjustment. {{</note>}}
The REC name cannot be changed after cluster creation.
{{<note>}} Each Redis Enterprise cluster requires at least 3 nodes. Single-node RECs are not supported. {{</note>}}
Apply the custom resource file to create your Redis Enterprise cluster.
{{<note>}} If you enabled automatic resource adjustment in your configuration, this step will trigger the operator to apply elevated capabilities. Ensure your security context allows it. {{</note>}}
oc apply -f <rec_rhel>.yaml
The operator typically creates the REC within a few minutes.
Check the cluster status.
oc get pod
You should receive a response similar to the following:
NAME | READY | STATUS | RESTARTS | AGE |
| -------------------------------- | ----- | ------- | -------- | --- |
| rec-name-0 | 2/2 | Running | 0 | 1m |
| rec-name-1 | 2/2 | Running | 0 | 1m |
| rec-name-2 | 2/2 | Running | 0 | 1m |
| rec-name-controller-x-x | 1/1 | Running | 0 | 1m |
| Redis-enterprise-operator-x-x | 1/1 | Running | 0 | 5m |
{{< embed-md "k8s-admission-webhook-cert.md" >}}
If not limited, the webhook intercepts requests from all namespaces. If you have several REC objects in your Kubernetes cluster, limit the webhook to the relevant namespaces. If you aren't using multiple namespaces, skip this step.
Verify your namespace is labeled and the label is unique to this namespace, as shown in the next example.
apiVersion: v1
kind: Namespace
metadata:
labels:
namespace-name: staging
name: staging
Patch the webhook spec with the namespaceSelector field.
cat > modified-webhook.yaml <<EOF
webhooks:
- name: redisenterprise.admission.redislabs
namespaceSelector:
matchLabels:
namespace-name: staging
EOF
Apply the patch.
oc patch ValidatingWebhookConfiguration \
redis-enterprise-admission --patch "$(cat modified-webhook.yaml)"
{{<note>}} For releases before 6.4.2-4, use this command instead:
oc patch ValidatingWebhookConfiguration \
redb-admission --patch "$(cat modified-webhook.yaml)"
The 6.4.2-4 release introduces a new ValidatingWebhookConfiguration to replace redb-admission. See the [6.4.2-4 release notes]({{< relref "/operate/kubernetes/release-notes/6-4-2-releases/" >}}).
{{</note>}}
Apply an invalid resource as shown below to force the admission controller to reject it. If it applies successfully, the admission controller is not installed correctly.
oc apply -f - << EOF
apiVersion: app.redislabs.com/v1alpha1
kind: RedisEnterpriseDatabase
metadata:
name: redis-enterprise-database
spec:
evictionPolicy: illegal
EOF
You should see this error from the admission controller webhook redisenterprise.admission.redislabs.
Error from server: error when creating "STDIN": admission webhook "redisenterprise.admission.redislabs" denied the request: eviction_policy: u'illegal' is not one of [u'volatile-lru', u'volatile-ttl', u'volatile-random', u'allkeys-lru', u'allkeys-random', u'noeviction', u'volatile-lfu', u'allkeys-lfu']
The operator uses the instructions in the Redis Enterprise database (REDB) custom resources to manage databases on the Redis Enterprise cluster.
Create a RedisEnterpriseDatabase custom resource.
This example creates a test database. For production databases, see [create a database]({{< relref "/operate/kubernetes/re-databases/db-controller.md#create-a-database" >}}) and [RedisEnterpriseDatabase API reference]({{< relref "/operate/kubernetes/reference/api/redis_enterprise_database_api" >}}).
cat << EOF > /tmp/redis-enterprise-database.yml
apiVersion: app.redislabs.com/v1alpha1
kind: RedisEnterpriseDatabase
metadata:
name: redis-enterprise-database
spec:
memorySize: 100MB
EOF
Apply the newly created REDB resource.
oc apply -f /tmp/redis-enterprise-database.yml