Essential-kubernetes-concepts

• Kubernetes Architecture
• Kubernetes vs AWS EKS Architecture
• Local Kubernetes local Cluster options

- Minikube

- Kind

- k3s

• Managed Kubernetes Services

1. Google Kubernetes Engine
2. Azure Kubernetes Service
3. Amazon Elastic Kubernetes Service
4. DigitalOcean
5. Red Hat OpenShift Kubernetes Engine
6. IBM Cloud Kubernetes Service

• CLIs?

1. AWS CLI
2. kubectl
3. eksctl

• Cloud Cluster Provisioning?

1. Kops
2. kubeadm
3. AWS EKS Cluster (Manually,using eksctl, Terraform etc)

Kubernetes Fundamental?

• Replication Controller, Replica Set and Deployment
• Pod, Init Container, Ephemeral containers
• Horizontal pod autoscaling and Vertical pod autoscaling
• statefulset, DaemonSet,Job
• Services : ClusterIP(default), NodePort,LoadBalancer, MeralLB Load Balancing for Bare Metal k8s
• Volumes : Persistent Volume(PV), PersistentVolumeClaim (PVC), Ephemeral Volumes, EmptyDir Volumes, hostPath Volumes, ConfigMap
• Plugins for Storing Kubernetes Volumes: NFS, CSI?
• Labels and Selectors
• Taints and Toleration
• Node Selector and NodeAffinity
• Security : ServiceAccount, Role, ClusterRole, RoleBinding, ClusterRoleBinding
• Policies : Limit Ranges, Resource Quotas etc.
• Networking: Ingress, network policies
• Deployment strategy

1. Recreate Deployment
2. Rolling Deployment
3. Blue/Green Deployment (Red/Black Deployment)
4. Canary Deployment

• Health Checks Readiness probes, Liveness probes, or Startup probes.

kubernetes debugging and troubleshooting

1. ImagePullBackoff
2. ErrImagePull
3. RegistryUnavailable
4. InvalidImageName
5. CrashLoopBackOff
6. KillContainerError