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Questions and Answers
What is a key feature of Deployments in Kubernetes?
A Pod can contain only one container.
False
What is the primary purpose of a Service in Kubernetes?
To provide a network identity and load balancing for accessing pods
Kubernetes provides _______________________, which allows for controlling traffic between pods and services.
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Match the following components with their primary function:
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Role-based access control (RBAC) is a built-in security feature of Kubernetes.
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What is a key benefit of using Persistent Volumes in Kubernetes?
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What is the purpose of Admission control in Kubernetes Security?
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In Kubernetes, _______________________ is the process of verifying identities.
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Kubernetes provides a built-in feature for secret management.
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Study Notes
Kubernetes Components
Deployments
- A deployment is a way to manage a set of replica pods
- It ensures a specified number of replicas are running at any given time
- Deployments can be scaled up or down, and rolled back to a previous version if needed
- Key features:
- Rolling updates and rollbacks
- Self-healing: replacing failed pods
- Scaling: increasing or decreasing replicas
Pods
- The basic execution unit in Kubernetes
- A pod represents a single instance of a running application
- Pods can contain one or more containers
- Key features:
- Ephemeral: pods can be created, scaled, and terminated dynamically
- Co-location: pods can share resources and communicate with each other
- Management: pods can be managed as a single unit
Services
- A logical abstraction over a set of pods
- Provides a network identity and load balancing for accessing pods
- Services can be exposed to the outside world or kept internal
- Key features:
- Service discovery: automatic registration and discovery of services
- Load balancing: distributing traffic across multiple pods
- Cluster-IP: assigning a fixed IP address to a service
Persistent Volumes
- A resource that provides persistent storage for data
- Decouples storage from pods and deployments
- Persistent volumes can be provisioned and managed dynamically
- Key features:
- Persistent data: data remains even if pods are deleted or recreated
- Dynamic provisioning: storage can be allocated and deallocated as needed
- Access modes: read-only, read-write, and others
Kubernetes Security
- Built-in security features:
- Network policies: controlling traffic between pods and services
- Secret management: storing and managing sensitive data
- Role-based access control (RBAC): controlling user and service access
- Key concepts:
- Authentication: verifying identities
- Authorization: controlling access to resources
- Admission control: enforcing security policies at runtime
Kubernetes Components
Deployments
- Manage a set of replica pods, ensuring a specified number of replicas run at any time
- Allow scaling up or down and rolling back to a previous version if needed
- Feature rolling updates and rollbacks, self-healing by replacing failed pods, and scaling
Pods
- Basic execution unit in Kubernetes, representing a single instance of a running application
- Contain one or more containers and are ephemeral, scalable, and manageable as a single unit
- Can be created, scaled, and terminated dynamically and share resources and communicate with each other
Services
- Logical abstraction over a set of pods, providing a network identity and load balancing
- Can be exposed to the outside world or kept internal, featuring service discovery and load balancing
- Assign a fixed IP address to a service and allow access to multiple pods
Persistent Volumes
- Resource providing persistent storage for data, decoupling storage from pods and deployments
- Data remains even if pods are deleted or recreated, with dynamic provisioning and access modes
- Storage can be allocated and deallocated as needed, with read-only, read-write, and other access modes
Kubernetes Security
- Built-in security features include network policies, secret management, and role-based access control (RBAC)
- Control traffic between pods and services, store and manage sensitive data, and control user and service access
- Key concepts include authentication, authorization, and admission control, ensuring security at runtime
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Description
Quiz about Kubernetes components, including deployments and pods. Learn about their features and functionality.
