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Recommended resource requirements for RHACS | Installing | Red Hat Advanced Cluster Security for Kubernetes 4.4
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Recommended resource requirements for Red Hat Advanced Cluster Security for Kubernetes

The recommended resource guidelines were developed by performing a focused test that created the following objects across a given number of namespaces:

  • 10 deployments, with 3 pod replicas in a sleep state, mounting 4 secrets, 4 config maps

  • 10 services, each one pointing to the TCP/8080 and TCP/8443 ports of one of the previous deployments

  • 1 route pointing to the first of the previous services

  • 10 secrets containing 2048 random string characters

  • 10 config maps containing 2048 random string characters

During the analysis of results, the number of deployments is identified as a primary factor for increasing of used resources. And we are using the number of deployments for the estimation of required resources.

Additional resources

If you are using Red Hat Advanced Cluster Security Cloud service (RHACS Cloud service), you do not need to review the requirements for Central services, because they are managed by Red Hat. You only need to look at the requirements for secured cluster services.

Central services contain the following components:

  • Central

  • Scanner

    For default resource requirements for the scanner, see the default resource requirements page.

Memory and CPU requirements

The following table lists the minimum memory and CPU values required to run Central for one secured cluster. The table includes the number of concurrent web portal users.

Deployments Concurrent web portal users CPU Memory

< 25,000

1 user

2 cores

8 GiB

< 25,000

< 5 users

6 cores

12 GiB

< 50,000

1 user

2 cores

12 GiB

< 50,000

< 5 users

6 cores

16 GiB

StackRox Scanner Memory and CPU requirements

The following table lists the minimum memory and CPU values required for the StackRox Scanner deployment in the Central cluster. The table includes the number of unique images deployed in all secured clusters.

Unique Images Replicas CPU Memory

< 100

1 replica

1 core

1.5 GiB

< 500

1 replica

2 cores

2.5 GiB

< 2000

2 replicas

2 cores

2.5 GiB

< 5000

3 replicas

2 cores

2.5 GiB
Additional resources

Secured cluster services contain the following components:

  • Sensor

  • Admission controller

  • Collector

    Collector component is not included on this page. Required resource requirements are listed on the default resource requirements page.

Sensor monitors your Kubernetes and OpenShift Container Platform clusters. These services currently deploy in a single deployment, which handles interactions with the Kubernetes API and coordinates with Collector.

Memory and CPU requirements

The following table lists the minimum memory and CPU values required to run Sensor on a secured cluster.

Deployments Pods per deployment CPU Memory

< 25,000

3

2 cores

8 GiB

< 50,000

3

2 cores

16 GiB

The admission controller prevents users from creating workloads that violate policies that you configure.

Memory and CPU requirements

The following table lists the minimum memory and CPU values required to run the admission controller on a secured cluster.

Deployments Pods per deployment CPU Memory

< 25,000

3

0.5 cores

600 MiB

< 50,000

3

0.5 cores

1200 MiB