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클라우드/AWS

[AWS] EKS Automation- 7주차 - ACK EC2, VPC생성

by Cloud_Park 2023. 6. 7.

2023.06.06 - [클라우드/AWS] - [AWS] EKS Automation- 7주차 - 실습환경 구축

2023.06.07 - [클라우드/AWS] - [AWS] EKS Automation- 7주차 - ACK S3 생성

 

동일하게 S3와 비슷한 방법으로 EC2, VPC를 생성을 실습해 보겠습니다.

 

실습

컨트롤러 설치 (참조 -https://aws-controllers-k8s.github.io/community/docs/tutorials/ec2-example/ , https://gallery.ecr.aws/aws-controllers-k8s/ec2-chart , https://github.com/aws-controllers-k8s/ec2-controller)

# 서비스명 변수 지정 및 helm 차트 다운로드
export SERVICE=ec2
export RELEASE_VERSION=$(curl -sL https://api.github.com/repos/aws-controllers-k8s/$SERVICE-controller/releases/latest | grep '"tag_name":' | cut -d'"' -f4 | cut -c 2-)
helm pull oci://public.ecr.aws/aws-controllers-k8s/$SERVICE-chart --version=$RELEASE_VERSION
tar xzvf $SERVICE-chart-$RELEASE_VERSION.tgz

# helm chart 확인
tree ~/$SERVICE-chart

# ACK EC2-Controller 설치
export ACK_SYSTEM_NAMESPACE=ack-system
export AWS_REGION=ap-northeast-2
helm install -n $ACK_SYSTEM_NAMESPACE ack-$SERVICE-controller --set aws.region="$AWS_REGION" ~/$SERVICE-chart

# 설치 확인
helm list --namespace $ACK_SYSTEM_NAMESPACE
kubectl -n $ACK_SYSTEM_NAMESPACE get pods -l "app.kubernetes.io/instance=ack-$SERVICE-controller"
kubectl get crd | grep $SERVICE
dhcpoptions.ec2.services.k8s.aws             2023-05-30T12:45:13Z
elasticipaddresses.ec2.services.k8s.aws      2023-05-30T12:45:13Z
instances.ec2.services.k8s.aws               2023-05-30T12:45:13Z
internetgateways.ec2.services.k8s.aws        2023-05-30T12:45:13Z
natgateways.ec2.services.k8s.aws             2023-05-30T12:45:13Z
routetables.ec2.services.k8s.aws             2023-05-30T12:45:13Z
securitygroups.ec2.services.k8s.aws          2023-05-30T12:45:13Z
subnets.ec2.services.k8s.aws                 2023-05-30T12:45:13Z
transitgateways.ec2.services.k8s.aws         2023-05-30T12:45:13Z
vpcendpoints.ec2.services.k8s.aws            2023-05-30T12:45:13Z
vpcs.ec2.services.k8s.aws                    2023-05-30T12:45:13Z

 

IRSA 설정 - 참조(https://github.com/aws-controllers-k8s/ec2-controller/blob/main/config/iam/recommended-policy-arn)

# Create an iamserviceaccount - AWS IAM role bound to a Kubernetes service account
eksctl create iamserviceaccount \
  --name ack-$SERVICE-controller \
  --namespace $ACK_SYSTEM_NAMESPACE \
  --cluster $CLUSTER_NAME \
  --attach-policy-arn $(aws iam list-policies --query 'Policies[?PolicyName==`AmazonEC2FullAccess`].Arn' --output text) \
  --override-existing-serviceaccounts --approve

# 확인 >> 웹 관리 콘솔에서 CloudFormation Stack >> IAM Role 확인
eksctl get iamserviceaccount --cluster $CLUSTER_NAME

# Inspecting the newly created Kubernetes Service Account, we can see the role we want it to assume in our pod.
kubectl get sa -n $ACK_SYSTEM_NAMESPACE
kubectl describe sa ack-$SERVICE-controller -n $ACK_SYSTEM_NAMESPACE

# Restart ACK service controller deployment using the following commands.
kubectl -n $ACK_SYSTEM_NAMESPACE rollout restart deploy ack-$SERVICE-controller-$SERVICE-chart

# IRSA 적용으로 Env, Volume 추가 확인
kubectl describe pod -n $ACK_SYSTEM_NAMESPACE -l k8s-app=$SERVICE-chart
...

 

 

VPC, Subnet 생성 및 삭제 - 참조 (https://aws-controllers-k8s.github.io/community/docs/tutorials/ec2-example/#optional-create-a-vpc-and-subnet)

# [터미널1] 모니터링
while true; do aws ec2 describe-vpcs --query 'Vpcs[*].{VPCId:VpcId, CidrBlock:CidrBlock}' --output text; echo "-----"; sleep 1; done

# VPC 생성
cat <<EOF > vpc.yaml
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: VPC
metadata:
  name: vpc-tutorial-test
spec:
  cidrBlocks: 
  - 10.0.0.0/16
  enableDNSSupport: true
  enableDNSHostnames: true
EOF
 
kubectl apply -f vpc.yaml
vpc.ec2.services.k8s.aws/vpc-tutorial-test created

# VPC 생성 확인
kubectl get vpcs
kubectl describe vpcs
aws ec2 describe-vpcs --query 'Vpcs[*].{VPCId:VpcId, CidrBlock:CidrBlock}' --output text


# [터미널1] 모니터링
VPCID=$(kubectl get vpcs vpc-tutorial-test -o jsonpath={.status.vpcID})
while true; do aws ec2 describe-subnets --filters "Name=vpc-id,Values=$VPCID" --query 'Subnets[*].{SubnetId:SubnetId, CidrBlock:CidrBlock}' --output text; echo "-----"; sleep 1 ; done

# 서브넷 생성
VPCID=$(kubectl get vpcs vpc-tutorial-test -o jsonpath={.status.vpcID})

cat <<EOF > subnet.yaml
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: Subnet
metadata:
  name: subnet-tutorial-test
spec:
  cidrBlock: 10.0.0.0/20
  vpcID: $VPCID
EOF
kubectl apply -f subnet.yaml

# 서브넷 생성 확인
kubectl get subnets
kubectl describe subnets
aws ec2 describe-subnets --filters "Name=vpc-id,Values=$VPCID" --query 'Subnets[*].{SubnetId:SubnetId, CidrBlock:CidrBlock}' --output text

# 리소스 삭제
kubectl delete -f subnet.yaml && kubectl delete -f vpc.yaml

 

 

복잡한  구성의 인스턴스 생성해보기 

구성도

https://aws-controllers-k8s.github.io/community/docs/tutorials/ec2-example/#create-a-vpc-workflow

 

해당 구성 yaml 

cat <<EOF > vpc-workflow.yaml
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: VPC
metadata:
  name: tutorial-vpc
spec:
  cidrBlocks: 
  - 10.0.0.0/16
  enableDNSSupport: true
  enableDNSHostnames: true
  tags:
    - key: name
      value: vpc-tutorial
---
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: InternetGateway
metadata:
  name: tutorial-igw
spec:
  vpcRef:
    from:
      name: tutorial-vpc
---
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: NATGateway
metadata:
  name: tutorial-natgateway1
spec:
  subnetRef:
    from:
      name: tutorial-public-subnet1
  allocationRef:
    from:
      name: tutorial-eip1
---
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: ElasticIPAddress
metadata:
  name: tutorial-eip1
spec:
  tags:
    - key: name
      value: eip-tutorial
---
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: RouteTable
metadata:
  name: tutorial-public-route-table
spec:
  vpcRef:
    from:
      name: tutorial-vpc
  routes:
  - destinationCIDRBlock: 0.0.0.0/0
    gatewayRef:
      from:
        name: tutorial-igw
---
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: RouteTable
metadata:
  name: tutorial-private-route-table-az1
spec:
  vpcRef:
    from:
      name: tutorial-vpc
  routes:
  - destinationCIDRBlock: 0.0.0.0/0
    natGatewayRef:
      from:
        name: tutorial-natgateway1
---
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: Subnet
metadata:
  name: tutorial-public-subnet1
spec:
  availabilityZone: ap-northeast-2a
  cidrBlock: 10.0.0.0/20
  mapPublicIPOnLaunch: true
  vpcRef:
    from:
      name: tutorial-vpc
  routeTableRefs:
  - from:
      name: tutorial-public-route-table
---
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: Subnet
metadata:
  name: tutorial-private-subnet1
spec:
  availabilityZone: ap-northeast-2a
  cidrBlock: 10.0.128.0/20
  vpcRef:
    from:
      name: tutorial-vpc
  routeTableRefs:
  - from:
      name: tutorial-private-route-table-az1
---
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: SecurityGroup
metadata:
  name: tutorial-security-group
spec:
  description: "ack security group"
  name: tutorial-sg
  vpcRef:
     from:
       name: tutorial-vpc
  ingressRules:
    - ipProtocol: tcp
      fromPort: 22
      toPort: 22
      ipRanges:
        - cidrIP: "0.0.0.0/0"
          description: "ingress"
EOF

 

생성 내용 확인

kubectl apply -f vpc-workflow.yaml

# [터미널1] NATGW 생성 완료 후 tutorial-private-route-table-az1 라우팅 테이블 ID가 확인되고 그후 tutorial-private-subnet1 서브넷ID가 확인됨 > 5분 정도 시간 소요
watch -d kubectl get routetables,subnet

# VPC 환경 생성 확인
kubectl describe vpcs
kubectl describe internetgateways
kubectl describe routetables
kubectl describe natgateways
kubectl describe elasticipaddresses
kubectl describe securitygroups

# 배포 도중 2개의 서브넷 상태 정보 비교 해보자
kubectl describe subnets
...
Status:
  Conditions:
    Last Transition Time:  2023-06-04T02:15:25Z
    Message:               Reference resolution failed
    Reason:                the referenced resource is not synced yet. resource:RouteTable, namespace:default, name:tutorial-private-route-table-az1
    Status:                Unknown
    Type:                  ACK.ReferencesResolved
...
Status:
  Ack Resource Metadata:
    Arn:                       arn:aws:ec2:ap-northeast-2:911283464785:subnet/subnet-0f5ae09e5d680030a
    Owner Account ID:          911283464785
    Region:                    ap-northeast-2
  Available IP Address Count:  4091
  Conditions:
    Last Transition Time:           2023-06-04T02:14:45Z
    Status:                         True
    Type:                           ACK.ReferencesResolved
    Last Transition Time:           2023-06-04T02:14:45Z
    Message:                        Resource synced successfully
    Reason:
    Status:                         True
    Type:                           ACK.ResourceSynced
...

--- 싱크를 맞춘다고 시간이 다소 소요됨

 

퍼블릭 인스턴스생성

# public 서브넷 ID 확인
PUBSUB1=$(kubectl get subnets tutorial-public-subnet1 -o jsonpath={.status.subnetID})
echo $PUBSUB1

# 보안그룹 ID 확인
TSG=$(kubectl get securitygroups tutorial-security-group -o jsonpath={.status.id})
echo $TSG

# Amazon Linux 2 최신 AMI ID 확인
AL2AMI=$(aws ec2 describe-images --owners amazon --filters "Name=name,Values=amzn2-ami-hvm-2.0.*-x86_64-gp2" --query 'Images[0].ImageId' --output text)
echo $AL2AMI

# 각자 자신의 SSH 키페어 이름 변수 지정
MYKEYPAIR=<각자 자신의 SSH 키페어 이름>
MYKEYPAIR=kp-gasida

# 변수 확인 > 특히 서브넷 ID가 확인되었는지 꼭 확인하자!
echo $PUBSUB1 , $TSG , $AL2AMI , $MYKEYPAIR


# [터미널1] 모니터링
while true; do aws ec2 describe-instances --query "Reservations[*].Instances[*].{PublicIPAdd:PublicIpAddress,PrivateIPAdd:PrivateIpAddress,InstanceName:Tags[?Key=='Name']|[0].Value,Status:State.Name}" --filters Name=instance-state-name,Values=running --output table; date ; sleep 1 ; done

# public 서브넷에 인스턴스 생성
cat <<EOF > tutorial-bastion-host.yaml
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: Instance
metadata:
  name: tutorial-bastion-host
spec:
  imageID: $AL2AMI # AL2 AMI ID - ap-northeast-2
  instanceType: t3.medium
  subnetID: $PUBSUB1
  securityGroupIDs:
  - $TSG
  keyName: $MYKEYPAIR
  tags:
    - key: producer
      value: ack
EOF
kubectl apply -f tutorial-bastion-host.yaml

# 인스턴스 생성 확인
kubectl get instance
kubectl describe instance
aws ec2 describe-instances --query "Reservations[*].Instances[*].{PublicIPAdd:PublicIpAddress,PrivateIPAdd:PrivateIpAddress,InstanceName:Tags[?Key=='Name']|[0].Value,Status:State.Name}" --filters Name=instance-state-name,Values=running --output table

 

인스턴스 접속하고 외부와 통신 확인

ssh -i <자신의 키페어파일> ec2-user@<public 서브넷에 인스턴스 퍼블릭IP>
------
# public 서브넷에 인스턴스 접속 후 외부 인터넷 통신 여부 확인 
ping -c 2 8.8.8.8
exit
------

-- 통신이 되지 않음 외부와 통신되도록 Egress설정하지 않음

 

 

 

Egress설정하기 

cat <<EOF > modify-sg.yaml
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: SecurityGroup
metadata:
  name: tutorial-security-group
spec:
  description: "ack security group"
  name: tutorial-sg
  vpcRef:
     from:
       name: tutorial-vpc
  ingressRules:
    - ipProtocol: tcp
      fromPort: 22
      toPort: 22
      ipRanges:
        - cidrIP: "0.0.0.0/0"
          description: "ingress"
  egressRules:
    - ipProtocol: '-1'
      ipRanges:
        - cidrIP: "0.0.0.0/0"
          description: "egress"
EOF
kubectl apply -f modify-sg.yaml

# 변경 확인 >> 보안그룹에 아웃바운드 규칙 확인
kubectl logs -n $ACK_SYSTEM_NAMESPACE -l k8s-app=ec2-chart -f

 

 

프라이빗 인스턴스 생성

# private 서브넷 ID 확인 >> NATGW 생성 완료 후 RT/SubnetID가 확인되어 다소 시간 필요함
PRISUB1=$(kubectl get subnets tutorial-private-subnet1 -o jsonpath={.status.subnetID})
echo $PRISUB1

# 변수 확인 > 특히 private 서브넷 ID가 확인되었는지 꼭 확인하자!
echo $PRISUB1 , $TSG , $AL2AMI , $MYKEYPAIR

# private 서브넷에 인스턴스 생성
cat <<EOF > tutorial-instance-private.yaml
apiVersion: ec2.services.k8s.aws/v1alpha1
kind: Instance
metadata:
  name: tutorial-instance-private
spec:
  imageID: $AL2AMI # AL2 AMI ID - ap-northeast-2
  instanceType: t3.medium
  subnetID: $PRISUB1
  securityGroupIDs:
  - $TSG
  keyName: $MYKEYPAIR
  tags:
    - key: producer
      value: ack
EOF
kubectl apply -f tutorial-instance-private.yaml

# 인스턴스 생성 확인
kubectl get instance
kubectl describe instance
aws ec2 describe-instances --query "Reservations[*].Instances[*].{PublicIPAdd:PublicIpAddress,PrivateIPAdd:PrivateIpAddress,InstanceName:Tags[?Key=='Name']|[0].Value,Status:State.Name}" --filters Name=instance-state-name,Values=running --output table

 

 

 

 

프라이빗 인스턴스 터널링을 통한 접근 

ssh -i <자신의 키페어파일> -L <자신의 임의 로컬 포트>:<private 서브넷의 인스턴스의 private ip 주소>:22 ec2-user@<public 서브넷에 인스턴스 퍼블릭IP> -v
ssh -i ~/.ssh/kp-gasida.pem -L 9999:10.0.129.196:22 ec2-user@3.34.96.12 -v
---
접속 후 그냥 두기
---

 

 

접근하여 외부와 통신 확인

ssh -i <자신의 키페어파일> -p <자신의 임의 로컬 포트> ec2-user@localhost
ssh -i ~/.ssh/kp-gasida.pem -p 9999 ec2-user@localhost
---
# IP 및 네트워크 정보 확인
ip -c addr
sudo ss -tnp
ping -c 2 8.8.8.8
curl ipinfo.io/ip ; echo # 출력되는 공인IP는 무엇인가?
exit
---

-- 외부와 통신되는 이유는 NAT 인스턴스를 통해 나가기 때문에

 

 

 

 

 

실습종료

리소스 삭제

kubectl delete -f tutorial-bastion-host.yaml && kubectl delete -f tutorial-instance-private.yaml
kubectl delete -f vpc-workflow.yaml  # vpc 관련 모든 리소스들 삭제에는 다소 시간이 소요됨
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