6.1.5. Scalability

Nubus for Kubernetes consists of several components. Some of the components allow you to scale them to your needs. This section describes which components you can scale up in Nubus and how you configure it.

Usually, the default replica count for each component is 1.

To change the scalability of the mentioned components, you need to apply the following principle:

1. Update your custom_values.yaml deployment file with the appropriate setting as described for each component later in this section.

2. Update your Nubus deployment through helm by following the steps in Apply configuration.

See also

Scalability architecture in Nubus for Kubernetes

in Univention Nubus for Kubernetes - Architecture Manual [2] for the architectural description of the scalability of the functional components in Nubus for Kubernetes.

6.1.5.1. Directory Manager

The Directory Manager has the UDM HTTP REST API as scalable component.

To configure the scalability of the UDM HTTP REST API, set nubusUdmRestApi.replicaCount to an integer value greater than the default value.

To apply configuration changes, see instructions at Scalability.

Important

Take the scalability considerations from Directory Manager in Univention Nubus for Kubernetes - Architecture Manual [2] into account.

6.1.5.2. Management UI

The Management UI has the following scalable components.

UMC-Server

To configure the scalability of the UMC Server, set nubusUmcServer.replicaCount to an integer value greater than the default value.

The UMC Server also has the setting nubusUmcServer.proxy.replicaCount for the load balancer with session stickiness. Change the value to an integer value greater than the default value.

UMC-Gateway

To configure the scalability of the UMC Gateway, set nubusUmcGateway.replicaCount to an integer value greater than the default value.

In a high-traffic environment, it’s more important to scale up the UMC Server than the UMC Gateway.

To apply configuration changes, see instructions at Scalability.

See also

Management UI

in Univention Nubus for Kubernetes - Architecture Manual [2] for architectural information about the scalability of the Management UI.

6.1.5.3. Identity Provider

The Identity Provider has the following scalable components.

Keycloak

To configure the scalability of Keycloak set keycloak.replicaCount to an integer value greater than the default value.

Keycloak Proxy

If your Nubus for Kubernetes deployment has the Keycloak Extensions enabled, you can scale up the Keycloak Proxy in the Keycloak Extensions. Scale it up along with the scaling of the Keycloak Kubernetes pod.

To configure the scalability of the Keycloak Proxy set nubusKeycloakExtensions.proxy.replicaCount to an integer value greater than the default value.

To apply configuration changes, see instructions at Scalability.

See also

Enable Keycloak Extensions

for information about how to enable Keycloak Extensions.

Identity Provider

in Univention Nubus for Kubernetes - Architecture Manual [2] for architectural information about the scalability of the Identity Provider.

6.1.5.4. Portal Service

The Portal Service has the following scalable components:

Portal Server

To configure the scalability of the Portal Server set nubusPortalServer.replicaCount to an integer value greater than the default value.

Portal Frontend

To configure the scalability of the Portal Frontend set nubusPortalFrontend.replicaCount to an integer value greater than the default value.

In a high-traffic environment, it’s more important to scale up the Portal Server Kubernetes pod than the Portal Frontend pod, because the Portal Server actively handles requests from the Portal Frontend and determines the portal content for each user.

To apply configuration changes, see instructions at Scalability.

See also

Portal Service

in Univention Nubus for Kubernetes - Architecture Manual [2] for architectural information about the scalability of the Portal Service.

6.1.5.5. Identity Store and Directory Service

For the scalability of the Identity Store and Directory Service, see Directory service high availability and scalability.