super-duper-octo-waffle

Final Project - kubernetes - Prometheus & Grafana

max-pods-calculator

• Download

curl -o max-pods-calculator.sh https://raw.githubusercontent.com/awslabs/amazon-eks-ami/master/files/max-pods-calculator.sh

• usage

./max-pods-calculator.sh --instance-type <instance-type> --cni-version 1.11.3-eksbuild.1

Kustomization usage

kubectl apply -k <kustomization_directory>

METRIC SERVER

kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.6.1/components.yaml

EKSCTL

• Create Cluster

$ eksctl create cluster --name EKS-CLUSTER --region ap-northeast-2 --version 1.21 --vpc-public-subnets subnet-05ad9b35153354dbc,subnet-0ab239ec58982fb8c --without-nodegroup
$ eksctl create cluster --name EKS-CLUSTER --region ap-northeast-2 --version 1.21 --without-nodegroup

• Create NodeGroup

$ eksctl create nodegroup \
  --cluster EKS-CLUSTER \
  --region ap-northeast-2 \
  --name NODEGROUP \
  --node-type t3.small \
  --nodes 2 \
  --nodes-min 2 \
  --nodes-max 4 \
  --ssh-access \
  --ssh-public-key my-key \
  --managed

• Create Cluster & NodeGroup

$ eksctl create cluster --name MY-EKS-CLUSTER --version 1.21 --region ap-northeast-2 --nodegroup-name MY-NODEGROUP --node-type t3.medium --nodes 2 --nodes-min 2 --nodes-max 2 --ssh-access --ssh-public-key my-key --managed

• --managed :

• --unmanaged :

• Delete NodeGroup

eksctl delete nodegroup --cluster=MY-EKS-CLUSTER --name=MY-NODEGROUP

• Delete Cluster

$ eksctl delete cluster MY-EKS-CLUSTER --region ap-northeast-2

Maximum number of pods (cpu/memory)

• t2.micro = 4 (1/1) $ 0.0144/h
• t3.micro = 4 (2/1) $ 0.0130/h
• t2.small = 11 (1/2) $ 0.0288/h
• t3.small = 11 (2/2) $ 0.0260/h -> 2022-08-24 실습 채택 -> Eviction
• t3.medium = 17 (2/4) $ 0.0520/h -> 2022-08-24 실습 채택2 -> 2022-08-24 성공 -> 2022-08-25 2개 도전
• t3.large = 35 (2/8) $ 0.1040/h 5g
• c4.large = 29 (2/3.75) $ 0.1140/h
• c4.xlarge = 58 (4/7.5) $ 0.2270/h
• m5.large = 29 (2/8) $ 0.1180/h 10g

docker's exec

kubectl exec --stdin --tty shell-demo -- /bin/bash
kubectl exec -i -t my-pod --container main-app -- /bin/bash

• nginx test

echo "Hello" > /usr/share/nginx/html/index.html

K8S env

kubectl exec my-nginx-3800858182-e9ihh -- printenv | grep SERVICE