Kubernetes

Kubernetes

Kubernetes Commands

Pods

Deployments

Services

Volumes

Volume Types

emptyDir - r/w pod etherial

hostPath

configMap.secret

nfs

persistenVolumeClaim

ConfigMaps

Secrets

Ingress Controllers

Kubeadm

• https://github.com/ObrienlabsDev/blog/issues/50

Helm

• https://github.com/ObrienlabsDev/biometric-backend/issues/6#issuecomment-2275686040

RKE / Rancher Installations

Rancher 1.6 to 2.0 was the goto bare metal or VM supported kubernetes distribution in the 2017-2019 timeframe around Kubernetes 1.7. The rancher product was integrated into SUSE and continues to support RKE 1 (original) and RKE 2 (FedRAMP compliant). K3s is the edge version of the RKE distribution as a CNCF project.

https://docs.rke2.io/

see - https://github.com/ObrienlabsDev/biometric-backend/issues/11

RKE supported versions

Limit installations to Ubuntu 22.04+ on IA64 (ARM64 is experimental). As of 202408 the following kubernetes components are supported for v1.30.2

• Kubernetes: v1.30.2
• RKE2 Version: v1.30.2+rke2r1
• Etcd: v3.5.13-k3s1
• Containerd: v1.7.17-k3s1
• Runc: v1.1.12
• Metrics-server: v0.7.1
• CoreDNS: v1.11.1
• Ingress-Nginx: v1.10.1-hardened1
• Helm-controller: v0.16.1
• CNI: Canal (Flannel: v0.25.4, Calico: v3.28.0)
• CNI: Calico v3.27.3
• CNI: Cilium v1.15.5
• CNI: Multus v4.0.2

Minikube

• https://minikube.sigs.k8s.io/docs/start/?arch=%2Fmacos%2Farm64%2Fstable%2Fbinary+download

Minikube on Ubuntu 22 on MAC IA64 Hardware

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
sudo install minikube-linux-amd64 /usr/local/bin/minikube && rm minikube-linux-amd64
minikube start

Docker Desktop

Enable kubernetes 1.29

Triage kubectl not working

For

ichaelobrien@mbp7 kubernetes % kubectl get nodes
E0802 19:52:50.751864   60075 memcache.go:265] couldn't get current server API group list: Get "https://127.0.0.1:64151/api?timeout=32s": dial tcp 127.0.0.1:64151: connect: connection refused
The connection to the server 127.0.0.1:64151 was refused - did you specify the right host or port?

If previously running "kind" switch to docker desktop

michaelobrien@mbp7 kubernetes % kubectl get nodes    
NAME             STATUS   ROLES           AGE     VERSION
docker-desktop   Ready    control-plane   4m18s   v1.29.2

Google Kubernetes Engine - GKE

AWS EKS

Azure

IBM Redhat Openshift Container Platform

• Latest 4.12

OCP Training

• https://www.redhat.com/en/services/training/do080-deploying-containerized-applications-technical-overview
• • https://rhtapps.redhat.com/promo/course/do080?segment=0
• https://www.redhat.com/en/services/training/red-hat-openshift-administration-i-operating-a-production-cluster
• https://www.redhat.com/en/services/training/do281-red-hat-openshift-administration-ii-configuring-a-production-cluster-with-exam

OCP on RHEL on prem

• https://www.redhat.com/en/technologies/cloud-computing/openshift/pricing
• https://www.redhat.com/en/technologies/cloud-computing/openshift/kubernetes-engine#buy

OCP on AWS

• https://www.redhat.com/en/technologies/cloud-computing/openshift/pricing

OCP on Azure

OCP on GCP