#AWS EKS 创建k8s生产环境实例
- 在AWS部署海外节点, 图简单使用web控制台创建VPC和k8s集群出错(k8s), 使用cli命令行工具创建成功
- 本实例为复盘, 记录aws命令行工具创建eks, 安装efs驱动、LBS、ingress-nginx,使用ECR镜像储存等
#安装命令行工具
#安装aws cli cd /tmp curl -kL "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip" unzip awscliv2.zip sudo ./aws/install aws --version #配置aws key aws configure #查看配置 aws configure list #安装kubectl curl -o kubectl https://s3.us-west-2.amazonaws.com/amazon-eks/1.22.6/2022-03-09/bin/linux/amd64/kubectl chmod +x ./kubectl mv kubectl /usr/local/bin kubectl version --short --client #安装eksctl curl --silent --location "https://github.com/weaveworks/eksctl/releases/latest/download/eksctl_$(uname -s)_amd64.tar.gz" | tar xz -C /tmp sudo mv /tmp/eksctl /usr/local/bin eksctl version #创建VPC网络和子网
#创建VPC网络和子网已单独发帖
https://www.cnblogs.com/elvi/p/16542406.html
#创建k8s集群
#env k8s_name=aws-k8s Region=ap-southeast-1 #新加坡 #获取aws账户id OwnerId=$(aws ec2 describe-vpcs --region ${Region} |jq -r ".Vpcs[0].OwnerId") #使用已有子网 private-subnets-id="subnet-lan-a-xxx,subnet-lan-b-xxx" public-subnets-id="subnet-public-a-xxx,subnet-public-b-xxx" # k8s cluster eksctl create cluster --region ${Region} --name ${k8s_name} --version 1.22 --vpc-private-subnets ${private-subnets-id} --vpc-public-subnets ${public-subnets-id} --managed --without-nodegroup --dry-run # 查看 eksctl get cluster --name ${k8s_name} --region ${Region} # 出错或不要了,可删除 # eksctl delete cluster --name=${k8s_name} # --dry-run 试运行,正式创建时去掉 # --without-nodegroup 不创建node节点 # --vpc-xx 添加已有网络,若不指定会自动创建 # 建议使用多个可用区网络,k8s集群创建后无法更改 # eksctl create cluster --help #查看帮助 #创建k8s计算节点组
#创建b区k8s节点 #k8s nodegroup test eksctl create nodegroup --region ${Region} --cluster ${k8s_name} --name k8s-work-test --node-type m5.large --nodes 1 --nodes-min 1 --nodes-max 10 --instance-name test-node-b --node-ami-family Ubuntu2004 --node-private-networking --node-zones ${Region}b --node-security-groups sg-xxxxxxx --ssh-access --ssh-public-key aws-bastion --full-ecr-access --managed --dry-run # --nodes 1 创建1个node节点, 规格 m5.large 2核8G # --node-ami-family Ubuntu2004 操作系统Ubuntu20.04 # --node-private-networking 使用私有子网 # --node-zones 可用区 # --node-security-groups 使用已创建的安全组 # --full-ecr-access ECR镜像仓库权限,一定要 # eksctl create nodegroup --help #查看帮助 #节点扩容 eksctl scale nodegroup --region ${Region} --cluster ${k8s_name} --nodes=2 --name k8s-work-test # 测试正常就可以删除, 创建配置更高的正式节点 # delete node # eksctl delete nodegroup --cluster=${k8s_name} --name=k8s-work-test #创建b区正式节点组 eksctl create nodegroup --region ${Region} --cluster ${k8s_name} --name k8s-work-b --node-type m5.4xlarge --nodes 2 --nodes-min 1 --nodes-max 10 --instance-name k8s-node-b --max-pods-per-node 110 --node-ami-family Ubuntu2004 --node-private-networking --node-zones ${Region}b --node-security-groups sg-xxxxxxx --ssh-access --ssh-public-key aws-bastion --full-ecr-access --external-dns-access --managed --dry-run #规格m5.4xlarge 16核64G #node-zones创建多区,可用于高可用 #为k8s集群创建IAM OIDC提供商
# IAM OIDC即 AWS Identity and Access Management (IAM) OpenID Connect (OIDC) # 创建IMA权限角色时,需要此功能开启 #查看是否有OIDC,没有则创建 oidc_id=$(aws eks describe-cluster --name ${k8s_name} --query "cluster.identity.oidc.issuer" --output text |cut -d'/' -f 5) if [ $(aws iam list-open-id-connect-providers | grep $oidc_id | wc -l ) -eq 0 ]; then eksctl utils associate-iam-oidc-provider --cluster ${k8s_name} --approve fi #eks安装efs csi驱动
- k8s使用AWS EFS储存时用到csi驱动
- efs可使用nfs协议挂载,但k8s节点默认没安装nfs客户端
#创建IAM policy和角色 curl -o iam-policy-efs.json https://raw.githubusercontent.com/kubernetes-sigs/aws-efs-csi-driver/master/docs/iam-policy-example.json aws iam create-policy --policy-name EKS_EFS_CSI_Driver_Policy --policy-document file://iam-policy-efs.json #创建权限 eksctl create iamserviceaccount --cluster ${k8s_name} --namespace kube-system --name efs-csi-controller-sa --attach-policy-arn arn:aws:iam::${OwnerId}:policy/EKS_EFS_CSI_Driver_Policy --approve --region ${Region} # 更新kubeconfig ~/.kube/config aws eks update-kubeconfig --region ${Region} --name ${k8s_name} #下载yaml文件 kubectl kustomize "github.com/kubernetes-sigs/aws-efs-csi-driver/deploy/kubernetes/overlays/stable/?ref=release-1.4" > aws-eks-efs-csi.1.4.yaml # vim aws-eks-efs-csi.1.4.yaml # 手动删除如下部分 apiVersion: v1 kind: ServiceAccount metadata: labels: app.kubernetes.io/name: aws-efs-csi-driver name: efs-csi-controller-sa namespace: kube-system --- #部署efs csi kubectl apply -f aws-eks-efs-csi.1.4.yaml #使用efs创建pvc实例
apiVersion: v1 kind: PersistentVolume metadata: name: aws-efs-test spec: capacity: storage: 2000Gi accessModes: - ReadWriteMany persistentVolumeReclaimPolicy: Retain csi: driver: efs.csi.aws.com volumeHandle: fs-xxx:/data --- apiVersion: v1 kind: PersistentVolumeClaim metadata: name: aws-efs-test spec: accessModes: - ReadWriteMany resources: requests: storage: 2000Gi # fs-xxx 为efs实例id,需要单独创建 # 创建efs后需添加子网和安全组,否则无法访问 #安装AWS LB Controller
- AWS LoadBalancer默认使用Classic Load Balancer模式
- 使用NLB、ALB模式的负载均衡器,和绑定EIP(绑定固定IP),必须安装LB controller
#创建IAM角色 curl -o iam_lbs_v2.4.2.json https://raw.githubusercontent.com/kubernetes-sigs/aws-load-balancer-controller/v2.4.2/docs/install/iam_policy.json aws iam create-policy --policy-name iam_lbs_v2.4.2 --policy-document file://iam_lbs_v2.4.2.json eksctl create iamserviceaccount --cluster=${k8s_name} --namespace=kube-system --name=aws-load-balancer-controller --role-name "AmazonEKSLoadBalancerControllerRole" --attach-policy-arn=arn:aws:iam::${OwnerId}:policy/iam_lbs_v2.4.2 --approve #安装cert-manager kubectl apply --validate=false -f https://github.com/jetstack/cert-manager/releases/download/v1.5.4/cert-manager.yaml #下载yaml curl -Lo aws-load-balancer-controller_2.4.2.yaml https://github.com/kubernetes-sigs/aws-load-balancer-controller/releases/download/v2.4.2/v2_4_2_full.yaml #更改k8s集群名称 sed -i.bak -e "s|your-cluster-name|${k8s_name}|" aws-load-balancer-controller_2.4.2.yaml #手动删除如下部分 apiVersion: v1 kind: ServiceAccount metadata: labels: app.kubernetes.io/component: controller app.kubernetes.io/name: aws-load-balancer-controller name: aws-load-balancer-controller namespace: kube-system --- #部署lbs kubectl apply -f aws-load-balancer-controller_2.4.2.yaml #查看 kubectl get deployment -n kube-system aws-load-balancer-controller #安装ingress-nginx-controller
#下载yaml curl -o aws-ingress-nginx.nlb.v1.3.0.yml https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.3.0/deploy/static/provider/aws/deploy.yaml #增加spec.ipFamilyPolicy: SingleStack #修改LoadBalancer部分的Service如下
--- apiVersion: v1 kind: Service metadata: annotations: #负载均衡器自定义名称 service.beta.kubernetes.io/aws-load-balancer-name: k8s-ingress-slb #负载均衡 NLB模式 service.beta.kubernetes.io/aws-load-balancer-type: "external" service.beta.kubernetes.io/aws-load-balancer-nlb-target-type: "ip" #使用EIP,互联网模式 service.beta.kubernetes.io/aws-load-balancer-scheme: "internet-facing" #public子网 service.beta.kubernetes.io/aws-load-balancer-subnets: subnet-axxx, subnet-bxxx #弹性IP地址 service.beta.kubernetes.io/aws-load-balancer-eip-allocations: eipalloc-axxx, eipalloc-bxxx #获取客户端真事IP service.beta.kubernetes.io/aws-load-balancer-target-group-attributes: preserve_client_ip.enabled=true labels: app.kubernetes.io/component: controller app.kubernetes.io/instance: ingress-nginx app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx app.kubernetes.io/version: 1.3.0 name: ingress-nginx-controller namespace: ingress-nginx spec: type: LoadBalancer # externalTrafficPolicy: Local ipFamilyPolicy: SingleStack ipFamilies: - IPv4 ports: - appProtocol: http name: http port: 80 protocol: TCP targetPort: http - appProtocol: https name: https port: 443 protocol: TCP targetPort: https selector: app.kubernetes.io/component: controller app.kubernetes.io/instance: ingress-nginx app.kubernetes.io/name: ingress-nginx #部署 kubectl apply -f aws-ingress-nginx.nlb.v1.3.0.yml #查看,获得得到EXTERNAL-IP地址 kubectl get svc ingress-nginx-controller -n ingress-nginx #ping测试EXTERNAL-IP地址ip是否为自己的EIP地址 ping k8s-ingress-slb-xxx.elb.${Region}.amazonaws.com #访问测试 curl -I k8s-ingress-slb-xxx.elb.${Region}.amazonaws.com #使用私有镜像仓库,并部署服务测试
#创建存储库nginx aws ecr create-repository --repository-name nginx --region $Region #登录储存库(缓存的登录凭证有效期12小时) aws ecr get-login-password --region $Region | docker login --username AWS --password-stdin ${OwnerId}.dkr.ecr.${Region}.amazonaws.com #下载公共镜像, 改tag为私有储存库地址 docker pull public.ecr.aws/nginx/nginx:alpine docker tag public.ecr.aws/nginx/nginx:alpine ${OwnerId}.dkr.ecr.${Region}.amazonaws.com/nginx:alpine #push镜像到新建的储存库 docker push ${OwnerId}.dkr.ecr.${Region}.amazonaws.com/nginx:alpine #deploy test kubectl create deployment nginx --port=80 --image=${OwnerId}.dkr.ecr.${Region}.amazonaws.com/nginx:alpine #查看 kubectl get pod #生命周期策略示例，保持5个镜像版本(tag) cat >aws-ecr-policy.json <<EOF { "rules": [ { "rulePriority": 1, "description": "Keep only 3 image", "selection": { "tagStatus": "any", "countType": "imageCountMoreThan", "countNumber": 3 }, "action": { "type": "expire" } } ] } EOF #创建策略 aws ecr put-lifecycle-policy --region $Region --repository-name nginx --lifecycle-policy-text file://aws-ecr-policy.json #删除清理pod kubectl delete deploy/nginx #删除存储库 aws ecr delete-repository --region $Region --force --repository-name nginx
- k8s有pull私有镜像仓库权限,是因为创建参数--full-ecr-access
- AWS ECR镜像储存服务不支持目录,只能分别给每个镜像创建储存库
- aws ecr get-login-password生成的凭证有效期12小时,可使用定时任务每天登录2次解决
参考文档
- eks https://docs.aws.amazon.com/zh_cn/eks/latest/userguide/create-cluster.html
- efs https://docs.aws.amazon.com/zh_cn/eks/latest/userguide/efs-csi.html
- lbs https://docs.aws.amazon.com/zh_cn/eks/latest/userguide/network-load-balancing.html
- ingress https://kubernetes.github.io/ingress-nginx/deploy/#aws
- ECR https://docs.aws.amazon.com/zh_cn/AmazonECR/latest/userguide/getting-started-cli.html
