OpenELB 安装

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下载yaml

官方地址：https://openelb.io/docs/

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wget https://raw.githubusercontent.com/openelb/openelb/master/deploy/openelb.yaml

修改 镜像地址

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image: docker.io/juestnow/openelb:v0.5.1
imagePullPolicy: IfNotPresent
image: docker.io/juestnow/kube-webhook-certgen:v1.1.1
imagePullPolicy: IfNotPresent
image: docker.io/juestnow/kube-webhook-certgen:v1.1.1
imagePullPolicy: IfNotPresent

部署 OpenELB

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kubectl apply -f openelb.yaml

创建 layer2 级别路由

  • eip.openelb.kubesphere.io/is-default-eip: “true” svc 配置为LoadBalancer 自动添加注释到svc 生成IP
  • address node 子网 未使用ip 地址池
  • interface 指定出口网卡名字 NIC on which OpenELB listens for ARP or NDP requests. This field is valid only when protocol is set to layer2.
  • protocol Specifies which mode of OpenELB the Eip object is used for. The value can be bgp, layer2, or vip. If this field is not specified, the default value bgp is used.
  • disable: Specifies whether the Eip object is disabled. The value can be:
    。 false: OpenELB can assign IP addresses in the Eip object to new LoadBalancer Services.
    。 true: OpenELB stops assigning IP addresses in the Eip object to new LoadBalancer Services. Existing Services are not affected.
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cat <<EOF | kubectl apply -f -
apiVersion: network.kubesphere.io/v1alpha2
kind: Eip
metadata:
  annotations:
    eip.openelb.kubesphere.io/is-default-eip: "true"
  name: layer2-eip
spec:
  address: 192.168.3.251-192.168.3.254
  interface: eth0
  protocol: layer2
  disable: false
EOF

测试svc申请 lb ip

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cat <<EOF | kubectl apply -f -
apiVersion: v1
kind: Service
metadata:
  annotations:
    eip.openelb.kubesphere.io/v1alpha2: layer2-eip
    lb.kubesphere.io/v1alpha1: openelb
    protocol.openelb.kubesphere.io/v1alpha1: layer2
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/version: 1.2.0
  name: ingress-nginx-controller
  namespace: ingress-nginx
spec:
  externalTrafficPolicy: Local
  ipFamilies:
  - IPv4
  ipFamilyPolicy: SingleStack
  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
  sessionAffinity: None
  type: LoadBalancer
EOF

查看结果

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root@Qist:/# kubectl -n ingress-nginx get svc ingress-nginx-controller
NAME                       TYPE           CLUSTER-IP      EXTERNAL-IP     PORT(S)                      AGE
ingress-nginx-controller   LoadBalancer   10.66.113.108   192.168.3.251   80:57482/TCP,443:46604/TCP   15d

# 远程访问可以正常打开
root@Qist:/# curl 192.168.3.251
# <html>
# <head><title>404 Not Found</title></head>
# <body>
# <center><h1>404 Not Found</h1></center>
# <hr><center>nginx</center>
# </body>
# </html>