Syntax highlighting of dcd2fa8 ~( devops/kubernetes/ingress)
# ingress-nginx [About](https://kubernetes.github.io/ingress-nginx/) | [Deployment](https://kubernetes.github.io/ingress-nginx/deploy/) ## Install ```bash kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/mandatory.yaml ``` ```bash kubectl get nodes -o wide NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME k8s-dev-master Ready master 97m v1.16.3 10.0.100.134 <none> Ubuntu 18.04.3 LTS 4.15.0-72-generic docker://18.9.7 k8s-dev-node1 Ready <none> 95m v1.16.3 10.0.100.135 <none> Ubuntu 18.04.3 LTS 4.15.0-72-generic docker://18.9.7 k8s-dev-node2 Ready <none> 95m v1.16.3 10.0.100.136 <none> Ubuntu 18.04.3 LTS 4.15.0-72-generic docker://18.9.7 ``` ## NodePort **Run Ingress NodePort Service** ```bash kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/provider/baremetal/service-nodeport.yaml kubectl -n ingress-nginx get svc # ingress-nginx NodePort 10.233.0.11 <none> 80:32469/TCP,443:30963/TCP 13m # !!! 32469 - host external port !!! ``` **Run Application** ```yaml # kubia-rc.yaml apiVersion: v1 kind: ReplicationController metadata: name: kubia spec: replicas: 3 selector: app: kubia template: metadata: labels: app: kubia spec: containers: - name: kubia image: zoidenberg/kubia ports: - containerPort: 8080 ``` ```yaml # kubia-svc.yaml apiVersion: v1 kind: Service metadata: name: kubia spec: ports: - port: 80 targetPort: 8080 selector: app: kubia ``` ```bash kubectl create -f kubia-rc.yaml kubectl get pods kubectl create -f kubia-svc.yaml kubectl get svc ``` **Run Ingress** ```yaml # kubia-ingress.yaml apiVersion: networking.k8s.io/v1beta1 kind: Ingress metadata: name: kubia spec: rules: - http: paths: - path: /foo backend: serviceName: kubia servicePort: 80 ``` ```bash kubectl -f kubia-ingress.yaml kubectl get ing kubia # NAME HOSTS ADDRESS PORTS AGE # kubia * 10.233.0.11 80 12m ``` **Test** ```bash curl 10.0.100.134:32469/foo # You've hit kubia-jjv5q curl 10.0.100.134:32469/foo # You've hit kubia-b9r5g curl 10.0.100.134:32469/foo # You've hit kubia-g4tw8 ``` ## LoadBalancer With MetalLB https://metallb.universe.tf *MetalLB* - это механизм, который позволяет создать LoadBalancer при запуске кластера k8s на голом железе. [Настройка HA-кластера Kubernetes на «голом железе» с GlusterFS & MetalLB. Часть 2/3](https://habr.com/ru/company/southbridge/blog/443110/) **Install MetalLB** ```bash # --- устанавливаем metallb # @see https://metallb.universe.tf/installation kubectl apply -f https://raw.githubusercontent.com/google/metallb/v0.8.3/manifests/metallb.yaml # --- проверяем что все модули запущены kubectl get pod --namespace=metallb-system # NAME READY STATUS RESTARTS AGE # controller-65895b47d4-tdfqd 1/1 Running 2 5h4m # speaker-9w6th 1/1 Running 2 7h14m # speaker-hdrsd 1/1 Running 2 7h14m # speaker-n9z95 1/1 Running 2 7h14m ``` **Config MetalLB** Создаем конфигурацию MetalLB. > !!! ВНИМАНИЕ !!! Диапазон адресов в поле *addressess* НЕ ДОЛЖЕН ПЕРЕСЕКАТЬСЯ с адресами узлов кластера. Они должны быть определены из свободных адресов (спросите у админов). ```yaml # metallb-config.yaml apiVersion: v1 kind: ConfigMap metadata: namespace: metallb-system name: config data: config: | address-pools: - name: default protocol: layer2 addresses: - 192.168.0.200-192.168.0.210 ``` ```bash kubectl create -f metallb-config.yaml kubectl -n metallb-system describe configmaps config ``` **Run Ingress-Nginx Load Balancer** ```yaml # service-load-balancer.yaml apiVersion: v1 kind: Service metadata: name: ingress-nginx namespace: ingress-nginx labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx spec: type: LoadBalancer ports: - name: http port: 80 targetPort: 80 protocol: TCP - name: https port: 443 targetPort: 443 protocol: TCP selector: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx --- ``` ```bash kubectl create -f service-load-balancer.yaml kubectl -n ingress-nginx get svc # NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE # ingress-nginx LoadBalancer 10.233.32.188 10.0.100.181 80:32002/TCP,443:31997/TCP 21m ``` EXTERNAL-IP 10.0.100.181 - global ip from metallb config pool (!not from nodes ips!) **Run Application** ```yaml # kubia-rc.yaml apiVersion: v1 kind: ReplicationController metadata: name: kubia spec: replicas: 3 selector: app: kubia template: metadata: labels: app: kubia spec: containers: - name: kubia image: zoidenberg/kubia ports: - containerPort: 8080 ``` ```yaml # kubia-svc.yaml apiVersion: v1 kind: Service metadata: name: kubia spec: ports: - port: 80 targetPort: 8080 selector: app: kubia ``` ```bash kubectl create -f kubia-rc.yaml kubectl get pods # NAME READY STATUS RESTARTS AGE # kubia-jsxd4 1/1 Running 0 25s # kubia-scrgn 1/1 Running 0 25s # kubia-wlxxv 1/1 Running 0 25s kubectl create -f kubia-svc.yaml kubectl get svc # NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE # ... # kubia ClusterIP 10.233.61.55 <none> 80/TCP 15m ``` **Run Ingress** ```yaml # kubia-ingress.yaml apiVersion: networking.k8s.io/v1beta1 kind: Ingress metadata: name: kubia spec: rules: - http: paths: - path: /foo backend: serviceName: kubia servicePort: 80 ``` ```bash kubectl create -f kubia-ingress.yaml kubectl get ing kubia # NAME HOSTS ADDRESS PORTS AGE # kubia * 10.0.100.181 80 21m ``` **Test** ```bash curl 10.0.100.181/foo # You've hit kubia-r9ts9 curl 10.0.100.181/foo # You've hit kubia-7pfmd curl 10.0.100.181/foo # You've hit kubia-r9ts9 curl 10.0.100.181/foo # You've hit kubia-ks8k7 ``` > Written with [StackEdit](https://stackedit.io/).