Free Practice Questions for Nutanix NCP-CN Exam

NKP uses Helm and Flux for application deployment, where applications are managed asHelmReleases, a custom resource that defines Helm chart deployments. The NKPA course explains that to validate the status of HelmReleases, administrators can use the kubectl command to query these resources. The correct command iskubectl get helmreleases -n ${PROJECT_NAMESPACE}, which lists all HelmReleases in the specified project namespace, showing their status (e.g., Ready, Failed) and other details like chart version and reconciliation status.

The Nutanix Cloud Native (NCP-CN) 6.10 Study Guide states: “To check the status of HelmReleases in NKP, use kubectl get helmreleases -n to view the current state of application deployments managed by Flux.” This command helps the operations team verify that applications are running correctly and identify any issues in production.

Incorrect Options:

A. kubectl get namespaces: This lists namespaces, not HelmReleases or their status.

C. kubectl edit helmreleases -n ${PROJECT_NAMESPACE}: This edits HelmRelease resources, not displays their status.

D. kubectl apply -f fluent-bit-overrides.yaml: This applies a configuration for Fluent Bit, unrelated to HelmRelease status.

NKP Platform Applications (e.g., Rook Ceph, Prometheus, Fluent Bit) are pre-integrated tools that can be deployed to Kubernetes clusters within a workspace to provide services like storage, monitoring, and logging. The NKPA course specifies that to deploy a platform application to all clusters in a workspace from the command line, the engineer uses thenkp create appdeploymentcommand. This command creates an application deployment resource that targets the specified workspace and clusters.

The required parameters include theapplication ID(to identify the platform application), theversion(to specify the desired version of the application), and theNKP workspace(to define the scope of clusters). For example: nkp create appdeployment --app-id prometheus --version 2.30.0 --workspace fin-vd. The Nutanix Cloud Native (NCP-CN) 6.10 Study Guide states: “Use the nkp create appdeployment command to deploy platform applications, specifying the application ID, version, and target workspace to apply the deployment across all clusters in that workspace.”

Incorrect Options:

B. nkp deploy platform-app: This is not a valid NKP command. The correct command is nkp create appdeployment.

C. nkp deploy app: This is not a recognized command in the NKPA documentation.

D. kubectl create appdeployment: kubectl interacts with Kubernetes resources, not NKP-specific platform applications.

The NKPA course outlines the default behaviors of NKP when deploying workload clusters within a workspace, regardless of the provisioning environment (e.g., AWS, Nutanix, Azure). When a workload cluster is deployed in AWS, NKP ensures consistency across the workspace by applying the following default behaviors:

The NKP workload cluster will receive all of the GitOps sources that have been assigned to the NKP workspace (Option A): NKP uses GitOps with Flux to manage cluster configurations and applications. The course explains that GitOps sources (e.g., Git repositories) assigned to a workspace are automatically applied to all clusters in that workspace, ensuring consistent configuration and application deployment. The Nutanix Cloud Native (NCP-CN) 6.10 Study Guide states: “New workload clusters inherit all GitOps sources configured for the workspace, enabling Flux to synchronize configurations from the specified repositories.”

The NKP workload cluster will be deployed all of the applications that have been enabled on this NKP workspace (Option D): NKP Platform Applications (e.g., Prometheus, Rook Ceph) enabled in the workspace are automatically deployed to new workload clusters. The NKPA course notes: “When a workload cluster is created, NKP deploys all platform applications enabled in the workspace to ensure consistent functionality across clusters.”

Incorrect Options:

B. The NKP workload cluster will receive all of the NKP RBAC policy: RBAC policies are defined at the workspace or project level and applied to users or groups, not automatically to clusters. Clusters inherit RBAC through user access, not as a default deployment behavior.

C. The NKP workload cluster will also be assigned to all of the NKP projects: Clusters are assigned to specific projects manually, not automatically to all projects in a workspace.

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.

The error message:

python

Copy

failed to list clusters: command "docker ps -a --filter label=io.x-k8s.kind.cluster --format '{{.Label "io.x-k8s.kind.cluster"}}'" failed with error: exit status 1

indicates that the command failed while attempting to listdockercontainers with the given filter. The kind tool (used for creating a bootstrap cluster) depends on Docker as the container runtime.

Root cause:

If Docker is not running or a compatible container runtime is not available (such as containerd), the kind tool cannot list or interact with the required containers, resulting in this error.

Key Reference:

“When creating bootstrap clusters, the kind tool requires Docker to be installed and running. If Docker is not running, errors will be encountered listing or interacting with containers.”

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 areRocky LinuxandUbuntu, 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 theNKPA 6.10 documentationand cluster autoscaler behavior, when nodes are scaled down in NKP (or any CAPI-managed environment), the node isdeletedfrom the infrastructure provider (vSphere, AWS, Nutanix, etc.). This effectively removes it from both the cluster and the underlying hypervisor or cloud provider, thus freeing up resources and reducing costs.

The Nutanix Kubernetes Platform (NKP) uses workspaces to provide isolated environments for different teams or projects, allowing each team to manage its own clusters, applications, and resources independently. According to the NKPA course, creating a new workspace is a key Day 2 operation to support multi-tenancy and isolated development environments, such as those required for the microservices in this scenario.

The course specifies that to create a new workspace, users must navigate to the workspace selection dropdown list in the top menu bar of the NKP user interface (UI) and selectCreate Workspace. This action opens a form where administrators can define the workspace name, description, and associated resources (e.g., clusters, users, and policies). The Nutanix Cloud Native (NCP-CN) 6.10 Study Guide states: “To create a new workspace in NKP, go to the workspace selection dropdown in the UI and select ‘Create Workspace’ to configure an isolated environment for a team or project.” This process ensures that each microservice team has its own isolated environment for development and testing, with access restricted to their specific workspace.

Incorrect Options:

A. From the Cluster selection, select Add Cluster: Adding a cluster creates a new Kubernetes cluster within an existing workspace, not a new workspace. The NKPA course distinguishes between cluster and workspace creation.

C. From the workspace selection dropdown list in the top menu bar, select Add Workspace: The NKPA course and UI use “Create Workspace” as the standard terminology, not “Add Workspace.”

D. From the Administration selection dropdown list in Infrastructure Providers, select Add Infrastructure Provider: This option is for configuring infrastructure providers (e.g., AWS, vSphere) for NKP, not for creating workspaces.

Attaching an existing Amazon EKS cluster to NKP for fleet management involves integrating the cluster into NKP’s management plane, which requires specific preparatory steps. The NKPA course outlines that the first step is tocreate a service account with cluster-admin permissionsin the EKS cluster. This service account is used by NKP to authenticate and manage the cluster, enabling operations like monitoring, scaling, and application deployment.

The Nutanix Cloud Native (NCP-CN) 6.10 Study Guide explains: “To attach an external Kubernetes cluster, such as Amazon EKS, to NKP, a service account with cluster-admin role bindings must be created to allow NKP to interact with the cluster’s API server.” The service account is configured with a token that NKP uses to authenticate requests. The NKPA course provides detailed steps, including creating the service account, assigning the cluster-admin ClusterRole, and generating a token for NKP integration. This step is critical to ensure NKP has the necessary permissions to manage the EKS cluster.

Incorrect Options:

A. Configure a ConfigMap according to EKS configuration: While ConfigMaps may be used for specific configurations, they are not the first step for attaching an EKS cluster. The NKPA course prioritizes service account creation.

C. Configure HAProxy to get connected to EKS clusters: HAProxy is a load balancer, not required for attaching EKS clusters to NKP. EKS uses AWS-native load balancers, and NKP connects via the Kubernetes API.

D. Deploy cert-manager in the EKS clusters: Cert-manager is used for certificate management, not a prerequisite for attaching EKS clusters. The NKPA course does not list it as a required step.

The NKPA course explains that to access a Kubernetes cluster managed by NKP, such as iot-1 in the workspace iot-plant-3, a kubeconfig file is required to authenticate and interact with the cluster’s API server. If the kubeconfig file is missing, the engineer can generate it using the NKP CLI. The correct command isnkp get kubeconfig -c iot-1 -w iot-plant-3 > iot-1.conf(Option B).

This command retrieves the kubeconfig for the specified cluster (-c iot-1) in the specified workspace (-w iot-plant-3) and redirects the output to a file named iot-1.conf. The engineer can then use this kubeconfig file with kubectl (e.g., kubectl --kubeconfig=iot-1.conf get pods) to review the deployment. The Nutanix Cloud Native (NCP-CN) 6.10 Study Guide states: “To generate a kubeconfig file for an NKP-managed cluster, use nkp get kubeconfig -c -w , which retrieves the necessary credentials for cluster access.”

Incorrect Options:

A. kubectl get kubeconfig: kubectl does not have a get kubeconfig subcommand, and it cannot generate kubeconfig files for NKP clusters.

C. kubectl get secret iot-1 -n kommander: While secrets in the kommander namespace may store credentials, this command does not format them as a kubeconfig file.

D. nkp get configmaps: This is not a valid command for retrieving kubeconfig files; ConfigMaps do not store kubeconfig data in this context.