Supported Compatibility Matrix Cluster Types

This topic describes the supported Kubernetes distributions, Kubernetes versions, instance types, nodes, limitations, and common use cases for clusters created with the Replicated compatibility matrix.

The compatibility matrix provisions cloud-based or virtual machine (VM) clusters.

VM Clusters

This section lists the supported VM cluster distributions for clusters created with the compatiblity matrix.

kind

The compatibility matrix supports creating kind clusters.

Type	Description
Supported Kubernetes Versions	1.23.17, 1.24.17, 1.25.16, 1.26.14, 1.27.11, 1.28.7, 1.29.2
Supported Instance Types	See Replicated Instance Types
Node Groups	No
Node Auto Scaling	No
Nodes	Supports a single node.
Limitations	See Limitations
Common Use Cases	Smoke tests

k3s

The compatibility matrix supports creating k3s clusters.

Type	Description
Supported k3s Versions	The upstream k8s version that matches the Kubernetes version requested.
Supported Kubernetes Versions	1.24.1, 1.24.2, 1.24.3, 1.24.4, 1.24.6, 1.24.7, 1.24.8, 1.24.9, 1.24.10, 1.24.11, 1.24.12, 1.24.13, 1.24.14, 1.24.15, 1.24.16, 1.24.17, 1.25.0, 1.25.2, 1.25.3, 1.25.4, 1.25.5, 1.25.6, 1.25.7, 1.25.8, 1.25.9, 1.25.10, 1.25.11, 1.25.12, 1.25.13, 1.25.14, 1.25.15, 1.25.16, 1.26.0, 1.26.1, 1.26.2, 1.26.3, 1.26.4, 1.26.5, 1.26.6, 1.26.7, 1.26.8, 1.26.9, 1.26.10, 1.26.11, 1.26.12, 1.26.13, 1.26.14, 1.27.1, 1.27.2, 1.27.3, 1.27.4, 1.27.5, 1.27.6, 1.27.7, 1.27.8, 1.27.9, 1.27.10, 1.27.11, 1.28.1, 1.28.2, 1.28.3, 1.28.4, 1.28.5, 1.28.6, 1.28.7, 1.29.0, 1.29.1, 1.29.2
Supported Instance Types	See Replicated Instance Types
Node Groups	Yes
Node Auto Scaling	No
Nodes	Supports multiple nodes.
Limitations	For additional limitations that apply to all distributions, see Limitations.
Common Use Cases	Smoke tests Customer release tests

RKE2 (Alpha)

The compatibility matrix supports creating RKE2 clusters.

Type	Description
Supported RKE2 Versions	The upstream k8s version that matches the Kubernetes version requested.
Supported Kubernetes Versions	1.24.1, 1.24.2, 1.24.3, 1.24.4, 1.24.6, 1.24.7, 1.24.8, 1.24.9, 1.24.10, 1.24.11, 1.24.12, 1.24.13, 1.24.14, 1.24.15, 1.24.16, 1.24.17, 1.25.0, 1.25.2, 1.25.3, 1.25.4, 1.25.5, 1.25.6, 1.25.7, 1.25.8, 1.25.9, 1.25.10, 1.25.11, 1.25.12, 1.25.13, 1.25.14, 1.25.15, 1.25.16, 1.26.0, 1.26.1, 1.26.2, 1.26.3, 1.26.4, 1.26.5, 1.26.6, 1.26.7, 1.26.8, 1.26.9, 1.26.10, 1.26.11, 1.26.12, 1.26.13, 1.26.14, 1.26.15, 1.27.1, 1.27.2, 1.27.3, 1.27.4, 1.27.5, 1.27.6, 1.27.7, 1.27.8, 1.27.9, 1.27.10, 1.27.11, 1.27.12, 1.28.2, 1.28.3, 1.28.4, 1.28.5, 1.28.6, 1.28.7, 1.28.8, 1.29.0, 1.29.1, 1.29.2, 1.29.3
Supported Instance Types	See Replicated Instance Types
Node Groups	Yes
Node Auto Scaling	No
Nodes	Supports multiple nodes.
Limitations	For additional limitations that apply to all distributions, see Limitations.
Common Use Cases	Smoke tests Customer release tests

OpenShift OKD

The compatibility matrix supports creating Red Hat OpenShift OKD clusters, which is the community distribution of OpenShift, using CodeReady Containers (CRC).

OpenShift clusters are provisioned with two users:

• (Default) A kubeadmin user with cluster-admin priviledges. Use the kubeadmin user only for administrative tasks such as creating new users or setting roles.
• A developer user with namespace-scoped priviledges. The developer user can be used to better simulate access in end-customer environments.

By default, kubeconfig context is set to the kubeadmin user. To switch to the developer user, run the command oc login --username developer.

Type	Description
Supported OpenShift Versions	4.10.0-okd, 4.11.0-okd, 4.12.0-okd, 4.13.0-okd, 4.14.0-okd, 4.15.0-okd
Supported Instance Types	See Replicated Instance Types
Node Groups	Yes
Node Auto Scaling	No
Nodes	Supports multiple nodes for versions 4.13.0-okd and later.
Limitations	OpenShift does not support r1.small instance types. OpenShift versions earlier than 4.13-okd do not have a registry mirror and so may be subject to rate limiting from Docker Hub. For information about Docker Hub rate limiting, see Docker Hub rate limit. To increase limits, Replicated recommends that you configure an image pull secret to pull public Docker Hub images as an authenticated user. For more information about how to configure image pull secrets, see Pull an Image from a Private Registry in the Kubernetes documentation. OpenShift builds take approximately 17 minutes. note Due to the time it takes to start an OpenShift cluster, a warm pool of OpenShift clusters is maintained. When available, an OpenShift cluster from the pool starts in approximately two minutes with default disks. When starting a cluster with a disk size different than the default, an additional four minutes is added to the warm cluster start time. For additional limitations that apply to all distributions, see Limitations.
Common Use Cases	Customer release tests

Embedded Cluster

The compatibility matrix supports creating clusters with Replicated embedded cluster. For more information, see Using Embedded Cluster (Beta).

Type	Description
Supported Embedded Cluster Versions	Any valid release sequence that has previously been promoted to the channel where the customer license is assigned. Version is optional and defaults to the latest available release on the channel.
Supported Instance Types	See Replicated Instance Types
Node Groups	No
Nodes	Supports a single node.
Limitations	The admin console UI is not exposed publicly and must be exposed via kubectl -n kotsadm port-forward svc/kurl-proxy-kotsadm 38800:8800. A valid customer license is required for installing with embedded cluster. The cluster prepare command is not supported. Embedded clusters cannot be created from the vendor portal. For additional limitations that apply to all distributions, see Limitations.
Common Use Cases	Customer release tests

kURL

The compatibility matrix supports creating kURL clusters.

Type	Description
Supported kURL Versions	Any kURL installer ID. For more information, see Creating a Kubernetes Installer.
Supported Instance Types	See Replicated Instance Types
Node Groups	Yes
Node Auto Scaling	No
Nodes	Supports multiple nodes.
Limitations	Does not work with the Longhorn add-on. For additional limitations that apply to all distributions, see Limitations.
Common Use Cases	Customer release tests

Cloud Clusters

This section lists the supported cloud clusters for compatibility testing.

EKS

The compatibility matrix supports creating AWS EKS clusters.

Type	Description
Supported Kubernetes Versions	1.23, 1.24, 1.25, 1.26, 1.27, 1.28, 1.29
Supported Instance Types	m6i.large, m6i.xlarge, m6i.2xlarge, m6i.4xlarge, m6i.8xlarge, m7i.large, m7i.xlarge, m7i.2xlarge, m7i.4xlarge, m7i.8xlarge, m7g.large (arm), m7g.xlarge (arm), m7g.2xlarge (arm), m7g.4xlarge (arm), m7g.8xlarge (arm), g4dn.xlarge (gpu), g4dn.2xlarge (gpu), g4dn.4xlarge (gpu), g4dn.8xlarge (gpu), g4dn.12xlarge (gpu), g4dn.16xlarge (gpu) g4dn instance types depend on available capacity. After a g4dn cluster is running, you also need to install your version of the NVIDIA device plugin for Kubernetes. See Amazon EKS optimized accelerated Amazon Linux AMIs in the AWS documentation.
Node Groups	Yes
Node Auto Scaling	Yes. Cost will be based on the max number of nodes.
Nodes	Supports multiple nodes.
Limitations	You can only choose a minor version, not a patch version. The EKS installer chooses the latest patch for that minor version. For additional limitations that apply to all distributions, see Limitations.
Common Use Cases	Customer release tests

GKE

The compatibility matrix supports creating Google GKE clusters.

Type	Description
Supported Kubernetes Versions	1.25, 1.26, 1.27, 1.28, 1.29
Supported Instance Types	n2-standard-2, n2-standard-4, n2-standard-8, n2-standard-16, n2-standard-32, t2a-standard-2 (arm), t2a-standard-4 (arm), t2a-standard-8 (arm), t2a-standard-16 (arm), t2a-standard-32 (arm), t2a-standard-48 (arm), e2-standard-2, e2-standard-4, e2-standard-8, e2-standard-16, e2-standard-32, n1-standard-1+nvidia-tesla-t4+1 (gpu), n1-standard-1+nvidia-tesla-t4+2 (gpu), n1-standard-1+nvidia-tesla-t4+4 (gpu), n1-standard-2+nvidia-tesla-t4+1 (gpu), n1-standard-2+nvidia-tesla-t4+2 (gpu), n1-standard-2+nvidia-tesla-t4+4 (gpu), n1-standard-4+nvidia-tesla-t4+1 (gpu), n1-standard-4+nvidia-tesla-t4+2 (gpu), n1-standard-4+nvidia-tesla-t4+4 (gpu), n1-standard-8+nvidia-tesla-t4+1 (gpu), n1-standard-8+nvidia-tesla-t4+2 (gpu), n1-standard-8+nvidia-tesla-t4+4 (gpu), n1-standard-16+nvidia-tesla-t4+1 (gpu), n1-standard-16+nvidia-tesla-t4+2 (gpu), n1-standard-16+nvidia-tesla-t4+4 (gpu), n1-standard-32+nvidia-tesla-t4+1 (gpu), n1-standard-32+nvidia-tesla-t4+2 (gpu), n1-standard-32+nvidia-tesla-t4+4 (gpu), n1-standard-64+nvidia-tesla-t4+1 (gpu), n1-standard-64+nvidia-tesla-t4+2 (gpu), n1-standard-64+nvidia-tesla-t4+4 (gpu), n1-standard-96+nvidia-tesla-t4+1 (gpu), n1-standard-96+nvidia-tesla-t4+2 (gpu), n1-standard-96+nvidia-tesla-t4+4 (gpu) You can specify more than one node.
Node Groups	Yes
Node Auto Scaling	Yes. Cost will be based on the max number of nodes.
Nodes	Supports multiple nodes.
Limitations	You can choose only a minor version, not a patch version. The GKE installer chooses the latest patch for that minor version. For additional limitations that apply to all distributions, see Limitations.
Common Use Cases	Customer release tests

AKS

The compatibility matrix supports creating Azure AKS clusters.

Type	Description
Supported Kubernetes Versions	1.26, 1.27, 1.28, 1.29
Supported Instance Types	Standard_B2ms, Standard_B4ms, Standard_B8ms, Standard_B16ms, Standard_DS2_v2, Standard_DS3_v2, Standard_DS4_v2, Standard_DS5_v2, Standard_D2ps_v5 (arm), Standard_D4ps_v5 (arm), Standard_D8ps_v5 (arm), Standard_D16ps_v5 (arm), Standard_D32ps_v5 (arm), Standard_D48ps_v5 (arm), Standard_NC4as_T4_v3 (gpu), Standard_NC8as_T4_v3 (gpu), Standard_NC16as_T4_v3 (gpu), Standard_NC64as_T4_v3 (gpu) GPU instance types depend on available capacity. After a GPU cluster is running, you also need to install your version of the NVIDIA device plugin for Kubernetes. See NVIDIA GPU Operator with Azure Kubernetes Service in the NVIDIA documentation.
Node Groups	Yes
Node Auto Scaling	Yes. Cost will be based on the max number of nodes.
Nodes	Supports multiple nodes.
Limitations	You can choose only a minor version, not a patch version. The AKS installer chooses the latest patch for that minor version. For additional limitations that apply to all distributions, see Limitations.
Common Use Cases	Customer release tests

Replicated Instance Types

When creating a VM-based cluster with the compatibility matrix, you must specify a Replicated instance type.

Type	Memory (GiB)	VCPU Count
r1.small	8 GB	2 VCPUs
r1.medium	16 GB	4 VCPUs
r1.large	32 GB	8 VCPUs
r1.xlarge	64 GB	16 VCPUs
r1.2xlarge	128 GB	32 VCPUs

Kubernetes Version Support Policy

We do not maintain forks or patches of the supported distributions. When a Kubernetes version in the compatibility matrix is out of support (EOL), Replicated will attempt to continue to support this version for six months for compatibility testing to support customers who are running out-of-date versions of Kubernetes. In the event that a critical security issue or bug is found and unresolved, we might discontinue support for EOL versions of Kubernetes prior to 6 months post EOL.