kubernetes

Intro to K8

• What is Kubernetes 

• K8s Architecture 

• Main K8s Components

• Minikube and Kubectl - Local Setup 

• Main Kubectl Commands - K8s CLI 

• K8s YAML Configuration File 

• Hands-On Demo 

• K8s Namespaces - Orhanize your Components

• Helm - Package Manager 

• Volumes - Persisting Data in K8s 

• K8s StatefulSet - Deploying Stateful Apps 

• K8s Services 

What is Kubernetes 

• Open source container orchestration tool 

• Developed by Google 

• Help you manage containerized applications in different deployment environments 

• What problem does Kubernetes solve?

• What are the tasks of an orchestration tool?

• Trend from Monolith to Microservices 

• High Avaliability

• Scalability

• Disaster recovery 

Kubernetes Components 

• Pod: Abstraction over container 

• Usually 1 application per Pod 

• Each Pod gets its own IP address 

• New IP address on re-creation 

Service:

• permanent IP address 

• lifecycle of Pod and Service NOT connected 

Ingress:

• Application goes to external end point and forward to Service

ConfigMap:

• Contain URL of applications like DB 

Secret:

• used to store secret data 

• base64 encoded 

• The build-in security mechanism is not enabled by default 

• Use it as environment vaiables or as a properties file 

Data storage: 

• volumes: physical local machine, cloud storage 

Service is also LB. 

Create deployment, how many replica. 

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