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| Section | Weight | Objectives |
|---|---|---|
| Services & Networking | 20% | - Service types: ClusterIP, NodePort, LoadBalancer, ExternalName - CoreDNS and service discovery - CNI configuration and troubleshooting - Network policies - Ingress resources and controllers |
| Cluster Architecture, Installation & Configuration | 25% | - Work with CRDs and Operators - Create and manage clusters with kubeadm - Manage cluster lifecycle and upgrades - Understand CNI, CSI, CRI interfaces - Install components via Helm / Kustomize - Implement high availability control plane - Prepare infrastructure for cluster installation - Manage RBAC |
| Storage | 10% | - Persistent Volumes (PV) and Persistent Volume Claims (PVC) - StorageClasses and dynamic provisioning - Volume types and access modes - StatefulSet storage configuration |
| Workloads & Scheduling | 15% | - Configure applications with ConfigMaps and Secrets - Pod scheduling: node selector, affinity, taints/tolerations - Resource requests, limits and autoscaling - Pod lifecycle, init containers, probes - Deployments, rolling updates and rollbacks |
| Troubleshooting | 30% | - Control plane component failures - Pod and application failures - Cluster component health checks - Worker node issues and recovery - Log collection and analysis - Network connectivity and DNS resolution problems |
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NEW QUESTION # 35
You have a Deployment that runs a containerized web application. The web application depends on a specific database service running on a different node in the cluster. The web application should only be able to connect to the database service on port 5432 and not any other services running on the database node. How can you define a NetworkPolicy to achieve this?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Network Policy Definition:
2. Explanation: - 'apiVersion: networking.k8s.io/v1 Specifies the API version for NetworkPolicy resources. - 'kind: NetworkPolicy': Specifies that this is a NetworkPolicy resource. - 'metadata.name: allow-database-access': Sets the name of the NetworkPolicy. - 'metadata.namespace: Specifies the namespace where the NetworkPolicy is applied. Replace with the actual namespace where your web application Deployment is running. - 'spec.podSelector.matchLabels: app: web-app': This selector targets Pods labeled with 'app: web-app', ensuring the NetworkPolicy applies to the web application Pods. - 'spec.ingress.from.podSelector.matchLabels: app: database': This allows incoming traffic only from Pods labeled with 'app: database'. - 'spec.ingress.ports.port: 5432': This allows communication only on port 5432. - 'spec.ingress.ports.protocol: TCP': Specifies the protocol (TCP) for the allowed port. 3. How it works: - This NetworkPolicy allows the web application Pods to connect only to the database service Pods on port 5432. It denies all other traffic from the database node, including other services that might be running on that node. 4. Implementation: - Apply the YAML using 'kubectl apply -f allow-database-access.yaml' 5. Verification: After applying the NetworkPolicy, test the connectivity from the web application Pods to the database service on port 5432 and to other services on the database node. You should observe that the NetworkPolicy effectively enforces the restrictions, allowing access only to the specified database port.
NEW QUESTION # 36
You are tasked with setting up a Kubernetes cluster for a company with a strict security policy. They have two different teams: Development and Operations, with distinct access requirements.
The Development team needs read-only access to all resources and the ability to create and manage deployments, pods, and services. The Operations team needs full access to all resources, including cluster management, and the ability to perform actions like scaling, rolling updates, and troubleshooting.
Design a role-based access control (RBAC) configuration using Kubernetes resources (Role, RoleBinding, ClusterRole, ClusterRoleBinding) to grant appropriate access to each team.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
Step 1: Create a Role for the Development team:
Step 2: Create a RoleBinding for the Development team:
Step 3: Create a ClusterRole for the Operations team:
Step 4: Create a ClusterRoleBinding for the Operations team:
The Role for the Development team grants specific permissions to create, manage, and view deployments, pods, and services. It also grants read-only access to all other resources. The RoleBinding links the "dev-role" to the "dev-user" account, allowing them to perform actions as defined by the Role. The ClusterRole for the Operations team provides full access to all cluster resources and allows them to perform any action, including cluster management tasks. The ClusterRoleBinding links the "ops-clusterrole" to the "ops-user" account, granting them complete control over the cluster. Note: You can replace "dev-user" and "ops-user" with actual user names or service accounts.
NEW QUESTION # 37
Ensure a single instance of pod nginx is running on each node of the Kubernetes cluster where nginx also represents the Image name which has to be used. Do not override any taints currently in place.
Use DaemonSet to complete this task and use ds-kusc00201 as DaemonSet name.
Answer:
Explanation:
NEW QUESTION # 38
Create a pod namedkucc8with asingle app container for each of the
following images running inside(there may be between 1 and 4images specified):
nginx + redis + memcached.
Answer:
Explanation:
See the solution below.
Explanation
solution
NEW QUESTION # 39
List all the pods sorted by created timestamp
Answer:
Explanation:
See the solution below.
Explanation
kubect1 get pods--sort-by=.metadata.creationTimestamp
NEW QUESTION # 40
......
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