MetalLB 官网
官方安装文档
为什么要使用 MetalLB
为什么Kubernetes不提供网络负载均衡器的实现（LoadBalancer类型的服务）用于裸机集群。
因为Kubernetes附带的Network LB的实现都是调用各种IaaS平台（GCP，AWS，Azure等）的粘合代码。如果您不在支持的IaaS平台（GCP，AWS，Azure等）上运行，则LoadBalancers在创建时将无限期保持“待处理”状态。
裸机集群运营商只剩下两个较小的工具，即“ NodePort”和“ externalIP”服务，可将用户流量引入其集群。这两个选项在生产用途上都有很大的不利之处，这使裸金属集群成为Kubernetes生态系统中的第二等公民。
MetalLB旨在通过提供与标准网络设备集成的Network LB实现来纠正这种不平衡，从而使裸机群集上的外部服务也尽可能“正常运行”。
图片来自 kuboard
使用 Helm 安装
安装 Helm
添加Chart源
helm repo add metallb https://metallb.github.io/metallb
helm repo update
## 查看
[root@k8s-master ~]# helm search repo metallb -l
NAME CHART VERSION APP VERSION DESCRIPTION
metallb/metallb 0.13.9 v0.13.9 A network load-balancer implementation for Kube...
metallb/metallb 0.13.7 v0.13.7 A network load-balancer implementation for Kube...
metallb/metallb 0.13.6 v0.13.6 A network load-balancer implementation for Kube...
metallb/metallb 0.13.5 v0.13.5 A network load-balancer implementation for Kube...
metallb/metallb 0.13.4 v0.13.4 A network load-balancer implementation for Kube...
metallb/metallb 0.13.3 v0.13.3 A network load-balancer implementation for Kube...
metallb/metallb 0.13.2 v0.13.2 A network load-balancer implementation for Kube...
metallb/metallb 0.12.1 v0.12.1 A network load-balancer implementation for Kube...
metallb/metallb 0.12.0 v0.12.0 A network load-balancer implementation for Kube...
metallb/metallb 0.11.0 v0.11.0 A network load-balancer implementation for Kube...
metallb/metallb 0.10.3 v0.10.3 A network load-balancer implementation for Kube...
metallb/metallb 0.10.2 v0.10.2 A network load-balancer implementation for Kube...
metallb/metallb 0.10.1 v0.10.1 A network load-balancer implementation for Kube...
metallb/metallb 0.10.0 v0.10.0 A network load-balancer implementation for Kube...
使用 Helm 3 安装 MetalLB
export METALLB_CHART_VERSION=0.13.6
## 将Chart包下载到本地
helm pull metallb/metallb --version $METALLB_CHART_VERSION
## 为 Kong MetalLB 创建命名空间
export METALLB_NAMESPACE=metallb-ns
values.yaml
# controller.
controller:
enabled: true
# -- Controller log level. Must be one of: `all`, `debug`, `info`, `warn`, `error` or `none`
logLevel: info
# command: /controller
# webhookMode: enabled
image:
repository: quay.io/metallb/controller
# speaker contains configuration specific to the MetalLB speaker
# daemonset.
speaker:
enabled: true
# -- Speaker log level. Must be one of: `all`, `debug`, `info`, `warn`, `error` or `none`
logLevel: info
image:
repository: quay.io/metallb/speaker
安装部署
## 安装部署
helm install metallb ./metallb-$METALLB_CHART_VERSION.tgz \
-n $METALLB_NAMESPACE \
--create-namespace \
-f values.yaml
## 卸载
helm uninstall metallb -n $METALLB_NAMESPACE
查看 运行情况
[root@k8s-master ~]# kubectl -n metallb-ns get all
NAME READY STATUS RESTARTS AGE
pod/metallb-controller-78d64b88b5-btjqv 1/1 Running 0 3m31s
pod/metallb-speaker-c2mcj 1/1 Running 0 3m31s
pod/metallb-speaker-d6zhl 1/1 Running 0 3m31s
pod/metallb-speaker-qkncb 1/1 Running 0 3m31s
pod/metallb-speaker-xn445 1/1 Running 0 3m31s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/metallb-webhook-service ClusterIP 10.96.190.24 <none> 443/TCP 3m31s
NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE
daemonset.apps/metallb-speaker 4 4 4 4 4 kubernetes.io/os=linux 3m31s
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/metallb-controller 1/1 1 1 3m31s
NAME DESIRED CURRENT READY AGE
replicaset.apps/metallb-controller-78d64b88b5 1 1 1 3m31s
添加IP地址池
这里在新版本中做了修改，与旧版中的 ConfigMap不同
参考官网地址
[root@k8s-master ~]# cat > ip-address-pool.yaml << ERIC
---
apiVersion: metallb.io/v1beta1
kind: IPAddressPool
metadata:
name: metallb-pool
namespace: metallb-ns
## 示例
#spec:
# addresses:
# - 192.168.10.0/24
# - 192.168.9.1-192.168.9.5
# - fc00:f853:0ccd:e799::/124
spec:
addresses:
- 192.168.0.50-192.168.0.50
---
apiVersion: metallb.io/v1beta1
kind: L2Advertisement
metadata:
name: layer2
namespace: metallb-ns
ERIC
kubectl apply -f ip-address-pool.yaml
查看结果
[root@dk8s-master meatllb]# kubectl get gatewayclass,gateway -A
NAME CONTROLLER ACCEPTED AGE
gatewayclass.gateway.networking.k8s.io/contour projectcontour.io/gateway-controller True 13m
NAMESPACE NAME CLASS ADDRESS PROGRAMMED AGE
projectcontour gateway.gateway.networking.k8s.io/contour contour 192.168.0.50 True 13m
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