Pass the Nutanix Certified Professional (NCP) NCP-CN Questions and answers with Dumpstech

The NKPA course specifies the supported operating systems for NKP clusters deployed using the Nutanix provisioning method (CAPX), which leverages Cluster API for Nutanix (CAPX) to provision clusters on Nutanix AHV. The supported OS platforms for CAPX are Rocky Linux and Ubuntu, as these distributions are tested and optimized for Nutanix infrastructure and Kubernetes requirements.

Rocky Linux is a CentOS replacement adopted by Nutanix after CentOS 8’s end-of-life in 2021, providing a stable, enterprise-grade OS. Ubuntu, particularly LTS versions like 20.04 or 22.04, is widely supported due to its compatibility with Kubernetes and Nutanix AHV. The Nutanix Cloud Native (NCP-CN) 6.10 Study Guide states: “When deploying NKP with the Nutanix provisioning method (CAPX), the supported OS platforms are Rocky Linux and Ubuntu, ensuring compatibility with Nutanix AHV and Kubernetes.” These OS images are typically prepared using NKP Image Builder (NIB) to include necessary components like kubeadm and containerd.

Incorrect Options:

A. CentOS and Rocky Linux: CentOS 8 is no longer supported post-2021, and Nutanix has shifted to Rocky Linux.

C. Flatcar, Rocky Linux, and Ubuntu: Flatcar Container Linux is not a supported OS for CAPX in NKP deployments.

D. CentOS and Ubuntu: CentOS is not supported, as noted above.

As per the NKPA 6.10 documentation, the primary requirement for attaching external (self-managed) Kubernetes clusters to NKP is network connectivity. Specifically, the NKP management cluster must be able to communicate with the Kubernetes API server and relevant services of the target cluster. This allows NKP to collect metrics, perform health checks, and manage the attached cluster through Kommander and associated tools.

Exact extract:

“For attaching existing Kubernetes clusters, ensure the NKP management cluster can reach the Kubernetes API server of the target cluster and that the kubeconfig used has sufficient permissions.”

There is no requirement that the Kubernetes versions be exactly matched or within N-1, nor that an NKP admin account be directly established on the target clusters; the connectivity and valid kubeconfig file are the essential requirements.

The NKPA 6.10 documentation confirms that Velero is the built-in backup and recovery solution provided as part of the NKP platform. It provides cluster-level and namespace-level backup, restore, and migration capabilities.

Exact extract from the documentation:

“Velero is the integrated, out-of-the-box backup and restore solution in NKP. It supports scheduled backups, disaster recovery, and application migration workflows.”

The exhibit indicates an error during the creation of a bootstrap cluster using the nkp create bootstrap command in an air-gapped environment. The NKPA course explains that a bootstrap cluster is a temporary Kubernetes cluster used to initialize Cluster API (CAPI) components for provisioning the target NKP cluster. In an air-gapped environment, all required resources, including container images, must be available locally since there is no Internet access to pull them from public registries.

The most likely reason for the error is that the bootstrap cluster image needs to be loaded prior to creating the bootstrap cluster (Option B). The course specifies that in air-gapped deployments, the bootstrap cluster image (typically a kind or k3s image used by CAPI) must be pre-loaded into a local container registry or the bastion host before running nkp create bootstrap. This image is part of the Air-Gapped Bundle provided by Nutanix, which includes all necessary container images for NKP deployment. Without pre-loading this image, the nkp create bootstrap command fails because it cannot pull the required image.

The Nutanix Cloud Native (NCP-CN) 6.10 Study Guide states: “In an air-gapped NKP deployment, ensure the bootstrap cluster image (e.g., kindest/node) is loaded into a local registry or host before executing nkp create bootstrap, as the command requires this image to create the temporary cluster.” The engineer must extract the bootstrap image from the Air-Gapped Bundle, load it using docker load or similar, and configure the local registry to make it accessible during the bootstrap process.

Incorrect Options:

A. The CAPI provisioning method needs to be specified as nkp create bootstrap nutanix: The nkp create bootstrap command does not require a provisioning method like nutanix at this stage; the provider (e.g., CAPX for Nutanix) is specified during the actual cluster creation (nkp create cluster), not bootstrap creation.

C. The Ubuntu 22.04 OS image needs to be NIB-prepped prior to creating the bootstrap: The Ubuntu 22.04 image is for the target NKP cluster nodes, not the bootstrap cluster, which uses a pre-built image (e.g., kind). NIB-prepping this image is a later step.

D. The nkp create bootstrap command needs to be executed as root: While some commands may require elevated privileges, the NKPA course does not specify that nkp create bootstrap must be run as root. The error is more likely related to missing images in an air-gapped setup.

The Secure Tunnel feature in NKP relies on HTTPS (TCP port 443) to establish secure, encrypted connections between the attached cluster and the management cluster, enabling fleet management even in restricted network environments.

Exact extract:

“Secure Tunnel uses TCP/443 (HTTPS) for establishing a secure connection between the attached cluster and NKP.”

The NKPA course addresses performance issues in NKP clusters, such as high CPU and memory consumption on worker nodes, by recommending scaling options to distribute workloads more effectively. The Kubernetes cluster in the scenario has 4 workers, each with 8 vCPUs and 32 GB RAM, and is running out of resources. The most effective solution is to add more workers to the cluster to increase overall capacity and balance the load, rather than modifying existing workers or reducing application replicas.

The correct action is to add one more worker using the command nkp scale nodepools ${NODEPOOL_NAME} --replicas=5 --cluster-name=${CLUSTER_NAME} -n ${CLUSTER_WORKSPACE} (Option D). This command scales the specified node pool to 5 replicas (from the current 4), adding one additional worker to the cluster. The new worker will have the same configuration (8 vCPUs, 32 GB RAM) as the existing workers, providing additional capacity to alleviate resource contention. The Nutanix Cloud Native (NCP-CN) 6.10 Study Guide states: “To address performance issues due to resource exhaustion in an NKP cluster, scale out by adding workers using nkp scale nodepools --replicas --cluster-name -n .”

Incorrect Options:

A. Call tech support to investigate: While support can help, the issue is clearly resource exhaustion, which can be resolved by scaling the cluster—a task the Platform Engineer can perform directly.

B. Ask developers to lower application replicas: Reducing replicas may decrease resource usage but could impact application availability or performance, which is not ideal for a development cluster.

C. Add more CPU and memory to workers with nkp scale --cpu 16 --memory 64: The nkp scale command does not support --cpu and --memory flags for resizing existing workers. Resizing VMs typically requires updating the node pool configuration and replacing nodes, which is more complex than adding new workers.

The NKPA course explains that NKP’s fleet management capabilities allow centralized policy federation and management of multiple Kubernetes clusters from a single pane of glass, while workspaces provide isolation for different teams or groups. To meet the requirement of federating policy while separating clusters by group, the IT team needs the NKP Ultimate license, which includes advanced fleet management features.

With NKP Ultimate, the IT team can:

Create three workspaces (one for each group: Fin VD, Fin Insurance, Fin Travel).

Assign the corresponding Kubernetes clusters to each workspace, ensuring isolation between groups.

Use NKP’s fleet management to apply policies (e.g., RBAC, monitoring, logging) across all clusters from a single pane of glass, such as the NKP UI or CLI.

The Nutanix Cloud Native (NCP-CN) 6.10 Study Guide states: “NKP Ultimate provides fleet management for centralized policy federation across multiple clusters, using workspaces to isolate clusters for different teams or groups.” This setup ensures that each group’s clusters are separated while maintaining centralized policy management, aligning with the IT team’s requirements.

Incorrect Options:

B. NKP Starter: The Starter license lacks fleet management and workspace isolation features, making it unsuitable for this scenario.

C. NKP Pro with projects: Projects are sub-divisions within workspaces for resource allocation, not for cluster isolation or fleet management. NKP Pro may not include full fleet management capabilities.

D. NKP Pro with workspaces: While NKP Pro supports workspaces, it may not provide the full fleet management needed for centralized policy federation across all clusters. NKP Ultimate is the better fit.

Comprehensive and Detailed Explanation:

The correct procedure for deleting an NKP cluster involves using the nkp delete cluster command with the appropriate cluster name and namespace. This ensures that not only the Kubernetes resources but also the corresponding NKP resources (e.g., nodepools, Kommander integration) are deleted cleanly and consistently. Simply deleting the VMs does not clean up the associated NKP management objects. This approach is detailed in the NKP documentation for cluster lifecycle management, emphasizing the need to use the provided CLI commands for full removal.

In an air-gapped NKP installation, the engineer starts with the NKP Air-Gapped Bundle, a tarball containing all necessary components (e.g., container images, binaries, configuration files) for deployment without Internet access. The NKPA course specifies that the first step is to extract this bundle on the bastion host to make its contents available for the installation process. The correct command is tar -xzvf nkp-air-gapped-bundle_v2.12.0_linux_amd64.tar.gz, which extracts the bundle into a directory, revealing the container images, CLI tools, and other resources needed for the deployment.

The Nutanix Cloud Native (NCP-CN) 6.10 Study Guide states: “To begin an air-gapped NKP installation, first extract the NKP Air-Gapped Bundle using tar -xzvf .tar.gz on the bastion host to access the installation artifacts.” After extraction, the engineer can proceed with loading container images (e.g., using docker load) and running NKP CLI commands to deploy the cluster, ensuring all dependencies are available locally.

Incorrect Options:

A. nkp push bundle --bundle: This is not a valid command. The bundle must be extracted before its contents can be used.

B. docker load -i konvoy-bootstrap-image-v2.12.0.tar: Loading the bootstrap image is a subsequent step after extracting the bundle, which contains this image tarball.

D. nkp create cluster nutanix: This command creates a cluster but cannot be run until the bundle is extracted and its images are loaded.

According to the NKPA 6.10 documentation, Rook Ceph is the recommended out-of-the-box storage solution integrated with NKP for persistent data storage, backups, and object storage within the Kubernetes environment.

Key Reference:

“Rook Ceph is integrated with NKP for providing persistent storage and backup support within the cluster.”