OpenELB是国内青云开源的一个负载均衡器，也是CNCF的沙箱项目，其实和MetalLB
但相比于MetalLB，OpenELB更适合生产环境
支持功能
- BGP/Layer2两种模式的负载均衡
- 基于路由器ECMP的负载均衡
- IP地址池管理
- 使用CRD进行BGP配置
直接部署
Installation | OpenELB
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| 搞个最新版的
wget https://raw.githubusercontent.com/openelb/openelb/master/deploy/openelb.yaml
kubectl apply -f openelb.yaml
kubectl get pods -n openelb-system
NAME READY STATUS RESTARTS AGE
openelb-admission-create-kzzxk 0/1 Completed 0 7m51s
openelb-admission-patch-rndlh 0/1 Completed 1 7m51s
openelb-controller-84b6c9b4d8-xfg2x 1/1 Running 0 3m27s
openelb-speaker-8pb47 1/1 Running 0 3m27s
openelb-speaker-h65dd 1/1 Running 0 2m45s
openelb-speaker-lzs99 1/1 Running 0 2m33s
openelb-speaker-nc2dh 1/1 Running 0 3m8s
openelb-speaker-nt2tw 1/1 Running 0 2m57s
openelb-speaker-zcgsj 1/1 Running 0 2m21s
创建地址池
cat > eip.yaml <<EOF
apiVersion: network.kubesphere.io/v1alpha2
kind: Eip
metadata:
name: eip-pool
namespace: openelb-system
spec:
address: 10.163.2.200-10.163.2.220
protocol: layer2
disable: false
interface: eth0
EOF
kubectl apply -f eip.yaml
kubectl -n openelb-system get eip
NAME CIDR USAGE TOTAL
eip-pool 10.163.2.200-10.163.2.220 21
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测试OpenELB
创建service
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| kubectl create deployment nginx --image=nginx:alpine
kubectl expose deployment nginx --port=80 --target-port=80
cat > nginx-svc.yaml <<EOF
apiVersion: v1
kind: Service
metadata:
name: nginx-svc
annotations:
lb.kubesphere.io/v1alpha1: openelb
protocol.openelb.kubesphere.io/v1alpha1: layer2
eip.openelb.kubesphere.io/v1alpha2: eip-pool
spec:
type: LoadBalancer
ports:
- port: 80
targetPort: 80
selector:
app: nginx
EOF
kubectl apply -f nginx-svc.yaml
kubectl get svc
nginx-svc LoadBalancer 10.233.32.27 10.163.2.200 80:30582/TCP 15m
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