# eksctl

## eksctl delete

<code>
eksctl delete cluster --name eks-demo
</code>


## yaml

<code>
$ eksctl create cluster \
--name eks-demo \
--region ap-northeast-2 \
--nodes 1 \
--node-type t2.medium \
--nodegroup-name eks-demo
</code>

<code>
apiVersion: eksctl.io/v1alpha5
kind: ClusterConfig

metadata:
    name: eks-demo
    region: ap-northeast-2
    
managedNodeGroups:
- name: eks-demo-spot
  instanceTypes: ["t2.micro"]
  spot: true
</code>

<code>
# An example of ClusterConfig showing nodegroups with mixed instances (spot and on demand):
---
apiVersion: eksctl.io/v1alpha5
kind: ClusterConfig

metadata:
    name: eks-cluster
    region: ap-northeast-2

nodeGroups:
    - name: eks-ng
      minSize: 1
      maxSize: 10
      desiredCapacity: 1
      instancesDistribution:
        maxPrice: 0.017
        instanceTypes: ["t3.small", "t3.medium"] # At least one instance type should be specified
        onDemandBaseCapacity: 0
        onDemandPercentageAboveBaseCapacity: 50
        spotInstancePools: 2
</code>

<code>
# spot-cluster.yaml

apiVersion: eksctl.io/v1alpha5
kind: ClusterConfig

metadata:
  name: spot-cluster
  region: us-west-2

managedNodeGroups:
- name: spot
  instanceTypes: ["c3.large","c4.large","c5.large","c5d.large","c5n.large","c5a.large"]
  spot: true


# `instanceTypes` defaults to [`m5.large`]
- name: spot-2
  spot: true

# On-Demand instances
- name: on-demand
  instanceTypes: ["c3.large", "c4.large", "c5.large"]
</code>

<code>
$ eksctl create cluster -f spot-cluster.yaml
</code>

- https://eksctl.io/usage/spot-instances/


## 설치

<code>
brew tap weaveworks/tap
brew install weaveworks/tap/eksctl

업그레이드: brew upgrade eksctl && brew link --overwrite eksctl
</code>

## 클러스터 생성

<code>
$ eksctl create cluster \
--name eks-demo \
--region ap-northeast-2 \
--nodes 1 \
--node-type t2.medium \
--nodegroup-name eks-demo
</code>


eksctl 명령을 실행해서 Amazon EKS 클러스터를 생성한다.  

<code bash>
$ eksctl create cluster \
  --name k8s-demo \
  --region ap-northeast-2 \
  --with-oidc \
  --ssh-access \
  --ssh-public-key aws--login-key \
  --nodes 3 \
  --node-type t3.medium \
  --node-volume-size=20 \
  --managed   
</code>

<code>
eksctl create cluster -f spot-cluster.yaml
</code>

### spot-cluster.yaml

<code>
apiVersion: eksctl.io/v1alpha5
kind: ClusterConfig

metadata:
  name: my-eks
  region: ap-northeast-2

managedNodeGroups:
  - name: my-eks-t2-large
    minSize: 1
    maxSize: 3
    desiredCapacity: 1
    instanceType: 't2.large'
    volumeSize: 10
    volumeType: gp2
    spot: true
</code>

## Docs

  - [[oidc]]
  - [[eni]]

## Links

- https://github.com/weaveworks/eksctl
- https://github.com/doitintl/eks-spot-to-ondemand-fallback/blob/master/cluster/cluster.yaml