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èŠããããŸãã 以äžã®ã³ãŒãäŸã§ã¯ãAWS ã¢ã«ãŠã³ã ID ããªãŒãžã§ã³ãªã©ã眮ãæããããšãåæãšããæååãããã€ããå«ãŸããŠããŸãããããã¯ãããªãã®ç°å¢ã«åã£ãå€ã§çœ®ãæããŠãã ããã 2. ã¯ã©ã¹ã¿ãŒã®äœæ eksctl ã䜿çšã㊠Amazon EKS ã¯ã©ã¹ã¿ãŒãããããžã§ãã³ã°ããŸããeksctl ã¯ã¯ã©ã¹ã¿ãŒèªäœã®äœæã«å ããŠãVPCããµãããããã»ãã¥ãªãã£ã°ã«ãŒããšãã£ãå¿
èŠãªãããã¯ãŒã¯ãªãœãŒã¹ãããããžã§ãã³ã°ããã³èšå®ããŸãã 以äžã® eksctl èšå®ãã¡ã€ã«ã¯ã Amazon EKS ã¯ã©ã¹ã¿ãŒãšãã®èšå®ãå®çŸ©ããŸãã apiVersion: eksctl.io/v1alpha5 kind: ClusterConfig metadata: name: nginx-ingress-controller-walkthrough region: ${AWS_REGION} version: '1.27' iam: withOIDC: true managedNodeGroups: - name: main-ng instanceType: m5.large desiredCapacity: 1 privateNetworking: true äžèšã®ã³ãŒãã config.yml ãã¡ã€ã«ã«èšè¿°ããŠãã ããã AWS_REGION ããã³ AWS_ACCOUNT ç°å¢å€æ°ãå®çŸ©ããŠãã ããããã®åŸãã¯ã©ã¹ã¿ãŒãäœæããŸãã envsubst < config.yml | eksctl create cluster -f - ãã®ãŠã©ãŒã¯ã¹ã«ãŒã§ã¯ãKubernetes ããŒãžã§ã³ 1.23 ã® Amazon EKS ãã©ãããã©ãŒã ããŒãžã§ã³ eks.3 ã䜿çšããŠããŸãã(蚳泚: 翻蚳æã«ã¯ãKubernetes ããŒãžã§ã³ 1.27 ã® Amazon EKS ãã©ãããã©ãŒã ããŒãžã§ã³ eks.4 ã䜿çšããŠåäœã確èªããŠããŸãã) ã·ã³ãã«ã«ãããããäžèšã®æ§æã§ã¯ãã»ãã¥ãªãã£ãã¢ãã¿ãªã³ã°ãªã©ãKubernetes ã¯ã©ã¹ã¿ãŒã®ããããžã§ãã³ã°ãšç®¡çã®å€ãã®åŽé¢ã¯èæ
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§ããŠãã ããã ã¯ã©ã¹ã¿ãŒã皌åããŠããããšã確èªããŸãã kubectl get nodes kubectl get pods -A äžèšã®ã³ãã³ãã¯ã1 ã€ã® Amazon EKS ããŒããš 4 ã€ã®å®è¡äžã® Pod ãè¿ãã¯ãã§ãã 3. Helm ã®ã€ã³ã¹ããŒã« ã³ã³ãããŒã©ãŒã®ã€ã³ã¹ããŒã«ãšèšå®ã«ã¯ãKubernetes ã«ãããŠäžè¬çãªããã±ãŒãžãããŒãžã£ãŒã§ãã Helm ã䜿çšããŸãã ãã¡ã ã®æé ã«åŸã£ãŠ Helm ãã€ã³ã¹ããŒã«ããŠãã ããã NGINX Ingress Controller ã®ã€ã³ã¹ããŒã« 1. Helm ã䜿çšããã³ã³ãããŒã©ãŒã®ã€ã³ã¹ããŒã« helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx helm upgrade -i ingress-nginx ingress-nginx/ingress-nginx \ --version 4.2.3 \ --namespace kube-system \ --set controller.service.type=ClusterIP kubectl -n kube-system rollout status deployment ingress-nginx-controller kubectl get deployment -n kube-system ingress-nginx-controller ã³ã³ãããŒã©ãŒã® Service ã ClusterIP ã«èšå®ããŠããŸããããã¯ããŠã©ãŒã¯ã¹ã«ãŒäžã«ã³ã³ãããŒã©ãŒã®æ§ã
ãªèšå®ãã©ã¡ãŒã¿ã倿Žããéã«ãããŒããã©ã³ãµãŒãåäœæãããã®ãåé¿ããããã§ããããŒããã©ã³ãµãŒã®äœæã«ã€ããŠã¯ãèšäºã®åŸåã§èª¬æããŸãã ãã¹ãçš Service ã®ããã〠1. Namespace ã®äœæ kubectl create namespace apps 2. Service ã®ãããã§ã¹ããã¡ã€ã«ã®äœæ 以äžã®ã³ãŒãã service.yml ãã¡ã€ã«ã«èšè¿°ããŸãã apiVersion: apps/v1 kind: Deployment metadata: name: ${SERVICE_NAME} namespace: ${NS} labels: app.kubernetes.io/name: ${SERVICE_NAME} spec: selector: matchLabels: app.kubernetes.io/name: ${SERVICE_NAME} replicas: 1 template: metadata: labels: app.kubernetes.io/name: ${SERVICE_NAME} spec: terminationGracePeriodSeconds: 0 containers: - name: ${SERVICE_NAME} image: hashicorp/http-echo imagePullPolicy: IfNotPresent args: - -listen=:3000 - -text=${SERVICE_NAME} ports: - name: app-port containerPort: 3000 resources: requests: cpu: 0.125 memory: 50Mi --- apiVersion: v1 kind: Service metadata: name: ${SERVICE_NAME} namespace: ${NS} labels: app.kubernetes.io/name: ${SERVICE_NAME} spec: type: ClusterIP selector: app.kubernetes.io/name: ${SERVICE_NAME} ports: - name: svc-port port: 80 targetPort: app-port protocol: TCP http-echo ã€ã¡ãŒãžã䜿çšããäžèšã® Service ã¯ã ${SERVICE_NAME} 倿°ã§å®çŸ©ãã Service åã§ãªã¯ãšã¹ãã«å¿çããŸããã·ã³ãã«ã«ãããããã¬ããªã«ã¯ 1 ã€ãšããŠããŸãã 3. ãµãŒãã¹ã®ãããã€ãšæ€èšŒ 以äžã®ã³ãã³ããå®è¡ããŸã (ãã®èšäºãéããŠããããã® Service ã䜿çšããŸã) ã SERVICE_NAME=first NS=apps envsubst < service.yml | kubectl apply -f - SERVICE_NAME=second NS=apps envsubst < service.yml | kubectl apply -f - SERVICE_NAME=third NS=apps envsubst < service.yml | kubectl apply -f - SERVICE_NAME=fourth NS=apps envsubst < service.yml | kubectl apply -f - SERVICE_NAME=error NS=apps envsubst < service.yml | kubectl apply -f - SERVICE_NAME=another-error NS=apps envsubst < service.yml | kubectl apply -f - ãã¹ãŠã®ãªãœãŒã¹ããããã€ãããŠããããšã確èªããŸãããã kubectl get pod,svc -n apps ã·ã³ãã«ãª Ingress ã®ããã〠1. Ingress ã®ãããã§ã¹ããã¡ã€ã«ã®äœæãš Ingress ã®ããã〠以äžã®ã³ãŒãã ingress.yml ãã¡ã€ã«ã«ã³ããŒããŠãã ããã apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: ${NS}-ingress namespace: ${NS} spec: ingressClassName: nginx rules: - http: paths: - path: /first pathType: Prefix backend: service: name: first port: name: svc-port - path: /second pathType: Prefix backend: service: name: second port: name: svc-port AWS Load Balancer Controller ã®å Žåã«èŠãã®ãšåãããã«ã ingressClassName ããããã£ã nginx ã«èšå®ããããšã§ã NGINX Ingress Controller ãã¿ãŒã²ããã«ããŸãã nginx ã¯ã³ã³ãããŒã©ãŒãšãšãã«ã€ã³ã¹ããŒã«ãããããã©ã«ãã® IngressClass ã®ååã§ãã 以äžã®ã³ãã³ããå®è¡ã㊠Ingress ããããã€ããŸãã NS=apps envsubst < ingress.yml | kubectl apply -f - ãã°ãããããšãIngress ãªãœãŒã¹ã®ç¶æ
ã確èªã§ããããã«ãªããŸã (IP ã¢ãã¬ã¹ã®ãã€ã³ãã«ã¯å°ãæéããããå ŽåããããŸã) ã kubectl get ingress -n apps 以äžã®ãããªåºåãåŸãããŸãã äžèšã® ADDRESS ãš PORT åã¯ãã³ã³ãããŒã©ãŒã® Service ã®ãã®ãèšå®ãããŠããŸãã ClusterIP ã¿ã€ãã§ Service ãäœæããããã«ã³ã³ãããŒã©ãŒãèšå®ãããããService ãšéä¿¡ããæ¹æ³ãšããŠãService ã«å¯ŸããããŒããã©ã¯ãŒãã£ã³ã°ãèšå®ããå¿
èŠããããŸãã kubectl port-forward -n kube-system svc/ingress-nginx-controller 8080:80 2. Ingress ã®ãã¹ã ããã§ãã³ã³ãããŒã©ãŒã® Service ã«ãªã¯ãšã¹ããéä¿¡ã§ããããã«ãªããŸããã curl -sS localhost:8080/first curl -sS localhost:8080/second curl -sS localhost:8080/third 次ã®çµæãåŸãããã°ãIngress ãªãœãŒã¹ãã¯æ£ãããããã€ãããèšå®ãããŠããŸãã IngressClass ã«é¢ããèå¯ åè¿°ããããã«ã nginx ãšããååã®ããã©ã«ãã® IngressClass ãã³ã³ãããŒã©ãŒãšäžç·ã«ã€ã³ã¹ããŒã«ãããŠããŸãã以äžã®ãããªãªãœãŒã¹ã§ãã apiVersion: networking.k8s.io/v1 kind: IngressClass metadata: name: nginx labels: app.kubernetes.io/name: ingress-nginx ... spec: controller: k8s.io/ingress-nginx AWS Load Balancer Controller ãšã¯ç°ãªãã NGINX Ingress Controller 㯠IngressClass ãã©ã¡ãŒã¿ ããµããŒãããŠããŸããã IngressClass ãããã©ã«ãã«ããããã«ã¯ã ingressclass.kubernetes.io/is-default-class: "true" ã¢ãããŒã·ã§ã³ã远å ããããã³ã³ãããŒã©ãŒã®ã€ã³ã¹ããŒã«æã«ããã©ã«ãã«ããããã«èšå®ããŸãã helm upgrade -i ingress-nginx ingress-nginx/ingress-nginx \ --namespace kube-system \ --set controller.ingressClassResource.default=true \ ... Default Backend ãšãšã©ãŒãã³ããªã³ã° Ingress ãªãœãŒã¹ã®ããããã«ãã£ãŠåŠçãããªããã¹ã«ãªã¯ãšã¹ããéä¿¡ãããšãnginx ã 404 ã§å¿çããããšã確èªããŸããããã®ã¬ã¹ãã³ã¹ã¯ãã³ã³ãããŒã©ãŒã«ã€ã³ã¹ããŒã«ãããŠãã Default Backend ããè¿ãããŸãããããã«ã¹ã¿ãã€ãºãã 1 ã€ã®æ¹æ³ã¯ãããšãã° Helm ã® values.yml ãã¡ã€ã« ãä»ããŠã controller.defaultBackend ããããã£ãèšå®ããããšã§ããããã«ã€ããŠã¯ããã®èšäºã§åŸã»ã©èª¬æããŸãããã 1 ã€ã®æ¹æ³ã¯ãIngress ãªãœãŒã¹ã« nginx.ingress.kubernetes.io/default-backend ã¢ãããŒã·ã§ã³ãèšå®ããããšã§ãã æåŸã®æ¹æ³ãšããŠã次ã«ç€ºããã㪠Ingress ã®ä»æ§ã§èšå®ããããšãã§ããŸãã 1. Ingress ã®æŽæ°ãšããã〠ingress.yml ãã¡ã€ã«ã以äžã®ããã«æŽæ°ããŸãã apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: ${NS}-ingress namespace: ${NS} spec: ingressClassName: nginx defaultBackend: service: name: error port: name: svc-port rules: - http: paths: - path: /first pathType: Prefix backend: service: name: first port: name: svc-port - path: /second pathType: Prefix backend: service: name: second port: name: svc-port ãããã€ããŸãã NS=apps envsubst < ingress.yml | kubectl apply -f - 2. Ingress ã®ãã¹ã ããã§ãåã³ãªã¯ãšã¹ããéä¿¡ããŠã¿ãŸãããã curl -sS localhost:8080/first curl -sS localhost:8080/second curl -sS localhost:8080/third ããã¯ãDefault Backend ã䜿çšããŠãæåŸ
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¬éããŸã (å€éšããŒããã©ã³ãµãŒçµç±ãªã©) ãããã«ã€ããŠã¯ããã®èšäºã®åŸåã§è©³ãã説æããŸãã Ingress ã® pathType ããã³æ£èŠè¡šçŸãšãªã©ã€ã ãããŸã§ãIngress ã«ãŒã«ã® pathType ã Prefix ãšå®çŸ©ããŠããŸããã pathType ã Exact ã«èšå®ãããã¹ã§ æ£èŠè¡šçŸãäœ¿çš ãããããªã©ã€ãã«ãŒã«ãå®çŸ©ããããšãã§ããŸãã 1. Ingress ã®æŽæ°ãšããã〠ingress.yml ãã¡ã€ã«ã® Ingress å®çŸ©ã倿Žããåãããã€ããŸãããã apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: ${NS}-ingress namespace: ${NS} annotations: nginx.ingress.kubernetes.io/rewrite-target: /$1 spec: ingressClassName: nginx defaultBackend: service: name: error port: name: svc-port rules: - http: paths: - path: /first/(.*)/foo pathType: Prefix backend: service: name: first port: name: svc-port nginx.ingress.kubernetes.io/rewrite-target ã¢ãããŒã·ã§ã³ã¯ãã«ãŒã«ã®ãã¹ã§å®çŸ©ããããã£ããã£ã°ã«ãŒãã®ãã¡ãã©ãã Service ã«éä¿¡ããããå®çŸ©ããŠããŸããããªãã¡ã /$1 ã®å Žåã¯ã1 çªç®ã®ãã£ããã£ã°ã«ãŒãã®å
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¬éããæãã·ã³ãã«ãªæ¹æ³ã¯ã Part 1 ã§èª¬æãã in-tree ã³ã³ãããŒã©ãŒ ã« Service ãåŠçãããããšã§ãããã®ããã«ã¯ãService ã®ã¿ã€ãã LoadBalancer ã«èšå®ããŸããããã«ãã£ãŠã AWS Classic Load Balancer (CLB) ãããããžã§ãã³ã°ãããŸãã helm upgrade -i ingress-nginx ingress-nginx/ingress-nginx \ --namespace kube-system \ --set controller.service.type=LoadBalancer \ ... AWS Classic Load Balancer ã®ä»£ããã«ãããæ°ãããæšå¥šããã AWS Network Load Balancer ãæå®ããããšãã§ããŸãã helm upgrade -i ingress-nginx ingress-nginx/ingress-nginx \ --namespace kube-system \ --set controller.service.type=LoadBalancer \ --set controller.service.annotations."service\.beta\.kubernetes\.io/aws-load-balancer-type"="nlb" \ ... ãŸããHelm ã® values.yml ãã¡ã€ã«ã䜿çšããŠããããã®èšå®ãã©ã¡ãŒã¿ãããå¿«é©ãªæ¹æ³ã§æäŸããããšãã§ããåã广ãåŸãããŸããæ¬¡ã®ã»ã¯ã·ã§ã³ã§ãã®ãããªäœ¿çšäŸãèŠãŠãããŸãã AWS Load Balancer Controller ã䜿çšããæ¹æ³ Service ã®ããã«äœæãããããžã§ãã³ã°ããã Network Load Balancer ããã詳现ã«å¶åŸ¡ãããå Žåã¯ãService ã³ã³ãããŒã©ãŒãã€ã³ã¹ããŒã«ããŸãã AWS Load Balancer Controller ãæšå¥šãããéžæè¢ã§ãã AWS Load Balancer Controller ã Ingress ãªãœãŒã¹ãåŠçããŸãããåŠç察象㮠IngressClass ã alb ã§ãã NGINX Ingress Controller ãšã¯ç°ãªããããè¡çªã¯çºçããŸããã NGINX Ingress Controller çšã« AWS NLB ãããããžã§ãã³ã°ãã AWS Load Balancer Controller ã®ã€ã³ã¹ããŒã«ã«ã€ããŠã¯ããã§ã«é£èŒã® Part 2 ã§èª¬æããŸããã®ã§ãããã«ã€ããŠã¯ããªãã¿ã®ã¯ãã§ãã 1. AWS Load Balancer Controller çšã® AWS IAM ããªã·ãŒã®äœæ ãã®æé ã®ã¹ããã 2 ãš3 ã®ã¿ ãå®è¡ããŠã AWSLoadBalancerControllerIAMPolicy ãäœæããŸããIRSA ( IAM Roles for Service Accounts ) ã䜿çšããŠãAWS Load Balancer Controller ã« IAM ã¢ã¯ã»ã¹èš±å¯ãæäŸããŸãã ãªãã OIDC IAM ãããã€ã㌠ã®ç»é²ã¯ãäžè¿°ã®ã¯ã©ã¹ã¿ãŒå®çŸ©ã«ãã£ãŠ eksctl ãèªåçã«è¡ããããæç€ºçã«è¡ãå¿
èŠã¯ãããŸããã 2. AWS Load Balancer Controller çšã® Service Account ã®äœæ é£èŒã® Part 2 ã§ã¯ã eksctl ã«ããã¯ã©ã¹ã¿ãŒã®äœææã«ã AWS Load Balancer Controller ã® Service Account ãäœæããŸããããä»åã¯åå¥ã«äœæããŸãã eksctl create iamserviceaccount \ --cluster=nginx-ingress-controller-walkthrough \ --name=aws-load-balancer-controller \ --namespace=kube-system \ --attach-policy-arn=arn:aws:iam::${AWS_ACCOUNT}:policy/AWSLoadBalancerControllerIAMPolicy \ --approve 3. CRD ã®ã€ã³ã¹ããŒã« 以äžã®ã³ãã³ãã¯ãAWS Load Balancer Controller ãæ©èœããããã«å¿
èŠãª CustomResourceDefinition ãã€ã³ã¹ããŒã«ããŸãã kubectl apply -k \ "github.com/aws/eks-charts/stable/aws-load-balancer-controller//crds?ref=master" 4. Helm ã䜿çšãã AWS Load Balancer Controller ã®ã€ã³ã¹ããŒã« helm repo add eks https://aws.github.io/eks-charts helm upgrade -i aws-load-balancer-controller eks/aws-load-balancer-controller \ -n kube-system \ --set clusterName=nginx-ingress-controller-walkthrough \ --set serviceAccount.create=false \ --set serviceAccount.name=aws-load-balancer-controller kubectl -n kube-system rollout status deployment aws-load-balancer-controller kubectl get deployment -n kube-system aws-load-balancer-controller 5. NGINX Ingress Controller ã®åããã〠NGINX Ingress Controller ã® Helm ãã£ãŒãã«èšå®ãã©ã¡ãŒã¿ãæž¡ãæ¹æ³ã倿ŽããŸãã values.yml ãã¡ã€ã«ãäœæããŸãã controller: service: type: LoadBalancer annotations: service.beta.kubernetes.io/aws-load-balancer-name: apps-ingress service.beta.kubernetes.io/aws-load-balancer-type: external service.beta.kubernetes.io/aws-load-balancer-scheme: internet-facing service.beta.kubernetes.io/aws-load-balancer-nlb-target-type: ip service.beta.kubernetes.io/aws-load-balancer-healthcheck-protocol: http service.beta.kubernetes.io/aws-load-balancer-healthcheck-path: /healthz service.beta.kubernetes.io/aws-load-balancer-healthcheck-port: 10254 ããã§ã¯ãService ã®ã¿ã€ãã倿ŽããããŒããã©ã³ãµãŒ (Network Load Balancer) ã®ååãå®çŸ©ããã¢ã¯ã»ã¹ã§ããããã« internet-facing ãšããŠããŸããããã«ãã¿ãŒã²ããã¿ã€ãã ip ãšããNGINX ãµãŒããŒã®ãã«ã¹ãã§ãã¯ãèšå®ããŠããŸãã AWS Load Balancer Controller ã® Service ã®ã¢ãããŒã·ã§ã³ã®è©³çްã«ã€ããŠã¯ã ãã ãåç
§ããŠãã ããã NGINX Ingress Controller ãåãããã€ããŸãã helm upgrade -i ingress-nginx ingress-nginx/ingress-nginx \ --version 4.2.3 \ --namespace kube-system \ --values values.yml kubectl -n kube-system rollout status deployment ingress-nginx-controller kubectl get deployment -n kube-system ingress-nginx-controller 6. Ingress ã®ãã¹ã pathType ãã³ã³ãããŒã©ãŒã®ãªã©ã€ãæ©èœã説æããããã«äœ¿çšããã®ãšåã Ingress å®çŸ©ã䜿ã£ãŠããããšã«æ³šæããŠãã ããã Network Load Balancer ã® URL ãç°å¢å€æ°ã«ä¿åããŸãã export NLB_URL=$(kubectl get -n kube-system service/ingress-nginx-controller \ -o jsonpath='{.status.loadBalancer.ingress[0].hostname}') æ°ååŸãããŒããã©ã³ãµãŒã®ããããžã§ãã³ã°ãå®äºãããšããªã¯ãšã¹ããéä¿¡ã§ããããã«ãªããŸãã curl ${NLB_URL}/first curl ${NLB_URL}/first/foo curl ${NLB_URL}/first/bar curl ${NLB_URL}/first/bar/foo ããã«ãã£ãŠãäºæ³ã©ããã以åãšåãçµæãåŸãããŸãã æ¢åã®ããŒããã©ã³ãµãŒã« NGINX Ingress Controller ãã¢ã¿ãããã åè¿°ã® Service ã³ã³ãããŒã©ãŒã䜿çšããæ¹æ³ã«å ããŠãAWS CLI ã Infrastructure as Code ããŒã« ( AWS CloudFormation ã AWS CDK ã Terraform ãªã©) ãä»ã㊠Application Load Balancer ã Network Load Balancer ãããããžã§ãã³ã°ããããšãå¯èœã§ãã ãã®ãããªå Žåãäžèšã§ã€ã³ã¹ããŒã«ããã«ã¹ã¿ã ãªãœãŒã¹å®çŸ©ã®äžéšã§ãã TargetGroupBinding ã䜿çšããããšãã§ããŸãã ãã®ãªãœãŒã¹ ã¯ãService ã® Pod ã® IP ã¢ãã¬ã¹ãã¿ãŒã²ããã°ã«ãŒãã®ã¿ãŒã²ãããšããŠç»é²ããããšã«ãããService (ååãš Namespace ã§éžæ) ãããŒããã©ã³ãµãŒã®ã¿ãŒã²ããã°ã«ãŒã ( ARN ã§éžæ) ã«ãã€ã³ãããŸãã ããã¯ãããŒããã©ã³ãµãŒãä»ã®ã³ã³ãã¥ãŒããªãœãŒã¹ã§äœ¿çšãããŠããå Žåã«æçšãªå ŽåããããŸãããŸãã«ãã¯ã©ã¹ã¿ãŒå
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