Google Cloud PCA Chapter 5 Kubernetes Basics, Cluster COmponents Control Plane, Worker Nodes, P

Google Cloud - PCA - Chapter 5: Kubernetes Basics, Cluster COmponents (Control Plane, Worker Nodes), Pods & Containers, Node Pools, Persistent Storage, Networking & Services, High Availability Clusters, Preemptible VMs, GKE Autopilot, Security Features - April 27
VIEW RECORDING: https://fathom.video/share/zmFi-c6savcTBj7V-q9qnrHhsT3yTxat
Meeting Purpose

Review Chapter 5 on containers and Google Cloud, focusing on orchestrating workloads with Kubernetes.

Key Takeaways

- Kubernetes is a managed environment for deploying and managing containerized applications, grouping multiple VMs into a cluster
- GKE offers various cluster types (zonal, regional, autopilot) with different levels of management and availability
- Networking in Kubernetes is handled through services (ClusterIP, NodePort, LoadBalancer) for stable endpoints
- Persistent storage is managed via Persistent Volumes and Persistent Volume Claims
- Cost optimization techniques include using preemptible VMs and GKE Autopilot

Topics

Kubernetes Basics

- Kubernetes groups multiple Google Compute Engine VMs into a cluster, with each VM called a node
- The cluster is managed by a centralized control plane
- Applications must be packaged as containers before deployment
- Deployed containers are referred to as workloads

Cluster Components

- Control Plane: Acts as the "mission control" for the Kubernetes cluster
- API Server: Front desk for all external tools and internal cluster requests
- Scheduler: Determines where to run new pods based on available resources
- Controller Manager: Watches cluster state and reconciles to desired state
- etcd: Key-value store for all cluster configuration and state data
- Worker Nodes: Google Compute Engine VMs that run application containers
- Container Runtime: Pulls and launches container images
- Kubelet: Node agent that communicates with control plane
- Kube-proxy: Handles networking and traffic routing

Pods and Containers

- Pods are the smallest deployable unit in Kubernetes
- Each pod encapsulates one or more tightly coupled containers
- Containers within a pod share network namespace and storage volumes
- Pods are ephemeral and designed to be replaceable

Node Pools

- Groups of identical compute engine VMs serving as worker nodes
- Allow for different configurations (machine type, disk size, image type) within a cluster
- Enable rolling upgrades and targeted maintenance
- Can be scaled independently and used for different workload types

Persistent Storage

- Persistent Volumes (PV): Piece of storage in the cluster
- Persistent Volume Claims (PVC): Request for storage from a pod
- Access modes: ReadWriteOnce, ReadOnlyMany, ReadWriteMany

Networking and Services

- Services provide stable endpoints for dynamic workloads
- Types:
- ClusterIP: Internal-only access
- NodePort: Exposes on every node's IP at a static port
- LoadBalancer: Provisions a GCP load balancer for external access

High Availability Clusters

- Zonal Clusters: Control plane in a single zone, worker nodes in one or multiple zones
- Regional Clusters: Control plane and worker nodes distributed across three zones

Preemptible VMs

- Short-lived VMs at a fraction of the cost of standard instances
- Ideal for stateless, interruptible, or batch-oriented workloads
- Can be terminated at any time within 24 hours

GKE Autopilot

- Fully managed Kubernetes service that abstracts away infrastructure management
- Automatically provisions and manages nodes based on workload requirements
- Pay only for resources pods actually use

Security Features

- Binary authorization, vulnerability scanning, workload identity
- Network policies, private clusters, VPC-native clusters
- Shielded nodes, control plane security, auto-upgrades

Next Steps

- Explore CI/CD integration with Cloud Build and GKE
- Implement security best practices in Kubernetes deployments
- Consider GKE Enterprise features for complex, multi-cluster environments
- Practice exam questions on Kubernetes concepts and GKE features

Видео Google Cloud PCA Chapter 5 Kubernetes Basics, Cluster COmponents Control Plane, Worker Nodes, P канала Jules of Tech