[k8s] kind로 쿠버네티스 설치하기 (2)

5. MetalLB 설치

• MetalLB 설치

# kubectl 이용
kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.14.5/config/manifests/metallb-native.yaml

# helm 차트 이용
helm repo add metallb https://metallb.github.io/metallb
helm install metallb metallb/metallb

• MetalLB 설정

apiVersion: metallb.io/v1beta1
kind: IPAddressPool
metadata:
  name: cwave-pool
  namespace: metallb-system
spec:
  addresses:
  - 192.168.247.100-192.168.247.110 # set by make target
---
apiVersion: metallb.io/v1beta1
kind: L2Advertisement
metadata:
  name: cwave-loadbalancer-advertisement
  namespace: metallb-system
spec:
  ipAddressPools:
  - cwave-pool

6.Ingress 및 LoadBalancer 설정

Ingress 및 Loadbalancer 를 설정하기 위해서는 KIND 를 이용한 클러스터 생성시 extraPortMapping 설정을 하고, kubeadm툴을 통해 custom node label 을 노드에 설정해야 합니다.

Ingress 가능한 클러스터 생성

kind 클러스터를 extraPortMappings 및 node-lables 설정과 함께 생성 합니다.

• ExtreaPortMappings : 로컬 호스트가 80 및 443 포트를 통해 Ingress Controller로 요청이 가능하게 설정합니다.
• node--labels : Ingress Controller 가 특정 라벨을 가진 노드에서만 수행 되도록 합니다.

cat <<EOF | kind create cluster --config=-
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
nodes:
- role: control-plane
  kubeadmConfigPatches:
  - |
    kind: InitConfiguration
    nodeRegistration:
      kubeletExtraArgs:
        node-labels: "ingress-ready=true"
  extraPortMappings:
  - containerPort: 80
    hostPort: 80
    protocol: TCP
  - containerPort: 443
    hostPort: 443
    protocol: TCP
EOF

Countour Ingress 생성

• Contour 설치

kubectl apply -f https://projectcontour.io/quickstart/contour.yaml

• Contour 설정 업데이트

kubectl patch daemonsets -n projectcontour envoy -p '{"spec":{"template":{"spec":{"nodeSelector":{"ingress-ready":"true"},"tolerations":[{"key":"node-role.kubernetes.io/control-plane","operator":"Equal","effect":"NoSchedule"},{"key":"node-role.kubernetes.io/master","operator":"Equal","effect":"NoSchedule"}]}}}}'

Kong Ingress 생성

• Kong 설치

kubectl apply -f https://raw.githubusercontent.com/Kong/kubernetes-ingress-controller/master/deploy/single/all-in-one-dbless.yaml

• Kong 설정 업데이트

kubectl patch deployment -n kong ingress-kong -p '{"spec":{"template":{"spec":{"containers":[{"name":"proxy","ports":[{"containerPort":8000,"hostPort":80,"name":"proxy","protocol":"TCP"},{"containerPort":8443,"hostPort":443,"name":"proxy-ssl","protocol":"TCP"}]}],"nodeSelector":{"ingress-ready":"true"},"tolerations":[{"key":"node-role.kubernetes.io/control-plane","operator":"Equal","effect":"NoSchedule"},{"key":"node-role.kubernetes.io/master","operator":"Equal","effect":"NoSchedule"}]}}}}'

Nginx Ingress 생성

• Nginx 설치

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/kind/deploy.yaml

• Nginx 설정 업데이트

kubectl wait --namespace ingress-nginx \
  --for=condition=ready pod \
  --selector=app.kubernetes.io/component=controller \
  --timeout=90s

Ingress 사용 예제

kind: Pod
apiVersion: v1
metadata:
  name: foo-app
  labels:
    app: foo
spec:
  containers:
  - name: foo-app
    image: hashicorp/http-echo:0.2.3
    args:
    - "-text=foo"
---
kind: Service
apiVersion: v1
metadata:
  name: foo-service
spec:
  selector:
    app: foo
  ports:
  # Default port used by the image
  - port: 5678
---
kind: Pod
apiVersion: v1
metadata:
  name: bar-app
  labels:
    app: bar
spec:
  containers:
  - name: bar-app
    image: hashicorp/http-echo:0.2.3
    args:
    - "-text=bar"
---
kind: Service
apiVersion: v1
metadata:
  name: bar-service
spec:
  selector:
    app: bar
  ports:
  # Default port used by the image
  - port: 5678
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: example-ingress
spec:
  rules:
  - http:
      paths:
      - pathType: Prefix
        path: "/foo"
        backend:
          service:
            name: foo-service
            port:
              number: 5678
      - pathType: Prefix
        path: "/bar"
        backend:
          service:
            name: bar-service
            port:
              number: 5678
---