The document introduces Kubernetes concepts for beginners, detailing its architecture and components such as the control plane, compute instances, and resource management. It includes practical commands for managing deployments, pods, and services using kubectl, as well as examples of configuration for deployment resources. Additionally, it references external learning resources for further exploration of Kubernetes.

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KUBERNETES FOR
BEGINNERS

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DCA

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disk
networking isolation
leveraging the
host’s freeBSD kernel
resource
management
process separation
Leverages single linux
kernel resource
allocation
namespace isolation
default runtime

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Compute Instance
ETCD ServiceKube SchedulerKube Controller
Manager
Kube API Server
admin.kubeconfig
API Cert
controller.kubeconfig schedule.kubeconfig encryption.yaml
ETCD Cert

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Compute Instance
resolvKube Proxykubeletcontainerd
config.toml
API Cert
worker.kubeconfig
kube-proxy
.kubeconfig
resolv.conf
pod

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Control Plane
N+
API Server
Controller Manager
Scheduler
ETCD
K8s Worker - Node
API Server
Kubelet
Kube-Proxy
Resolv
K8s Worker - Node
API Server
Kubelet
Kube-Proxy
Resolv

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~ kubectl run ngnix --image=nginx --replicas=2
~ kubectl apply -f ./myapp.yaml
~ kubectl get {pods, deployments, nodes, services, namespaces..}
~ kubectl config current-context

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~ kubectl exec -it /bin/sh
~ kubectl port-forward deployment/myappdeployment 1443:443
~ kubectl top node node1
~ kubectl log deployment/myappdeployment

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apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: prometheus-deployment
namespace: monitoring
spec:
replicas: 3

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pod
application container
sidecar service
logging
backend

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Jetstack

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Nebulaworks
Github: Kubernetes the Hard Way
The Children's Illustrated Guide to Kubernetes
Tutorials

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Less work managing the cluster

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