INDEX

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2024-01-04 17:00
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Devops Toolkit... eksctl - How to Create and Manage AWS EKS clusters
https://www.youtube.com/watch?v=pNECqaxyewQ

AWS Web UI > AWS CLI > Terraform > eksctl (simpler)
	export AWS_ACCESS_KEY_ID=...; export AWS_SECRET_ACCESS_KEY=...
	export KUBECONFIG=$PWD/kubeconfig.yaml

	eksctl create cluster # Prompts for info to make a cluster
	eksctl create cluster --name devops-catalog --region us-east-1 --verison 1.18 \
	 --nodegroup-name primary ... # Manually put in all data unprompted

	git clone https://github/vfarcic/eksctl-demo.git; cd eksctl-demo/

	# cluster-1.17.yaml # Look at eksctl docs for how to write these
	apiVersion: eksctl.io/v1alpha5
	kind: ClusterConfig
	metadata:
	  name: devops-catalog
	  region: us-east-1
	  version: "1.17" # Intentionally old version
	managedNodeGroups:
	- name: primary
	  instanceType: t2.small # Size of worker node VMs (minimal for this task)
	  minSize: 3
	  maxSize: 6
	  spot: true # Use cheaper instances

	eksctl create cluster --config-file cluster-1.17.yaml # Takes a long time

Look in AWS CloudFormation - stacks created for you - very complicated
	eksctl get cluster --region us-east-1 # Get kubernetes clusters

	# To get autoscaling working, need to look at docs for AWS - not built in
	eksctl scale nodegroupd --cluster devops-catalog --node 4 --name primary # Can scale

	# To upgrade version, need to make a new node group - change name of group with version
	eksctl upgrade cluster --config-file cluster-1.18.yaml # Just gives information
	... --approve # Actually upgrades control plane (takes a long time with no feedback)
	kubectl get nodes # Nodes are still on old version
	eksctl create nodegroup --config-file cluster-1.18.yaml # Makes NEW node group
	eksctl delete nodegroup --config-file cluster-1.18.yaml --only-missing # Remove old

	eksctl delete cluster --config-file cluster-1.18.yaml --wait # Delete whole cluster