# Install MetalLB use Rancher

## 安裝 MetalLB

## 設定 MetalLB
* 規劃 LoadBalancer 可用 ip 範圍

apiVersion: metallb.io/v1beta1
kind: IPAddressPool
metadata:
  name: mlb1
  namespace: metallb-system
spec:
  addresses:
    - 192.168.11.75-192.168.11.76
---
apiVersion: metallb.io/v1beta1
kind: L2Advertisement
metadata:
  name: mlb1
  namespace: metallb-system

* 檢查 metallb 狀態

$ kubectl get pod -n metallb-system -o wide
NAME                                  READY   STATUS    RESTARTS   AGE   IP               NODE   NOMINATED NODE   READINESS GATES
metallb-controller-5ccf8fb898-wwcqr   1/1     Running   0          15m   10.42.149.95     rke2   <none>           <none>
metallb-speaker-cjr6r                 4/4     Running   0          15m   192.168.11.101   rke2   <none>           <none>

## 測試

* 建立deployment

$ echo '
apiVersion: apps/v1
kind: Deployment
metadata:
  name: s1.dep
spec:
  replicas: 2
  selector:
    matchLabels:
      app: s1.dep
  template:
    metadata:
      labels:
        app: s1.dep
    spec:
      containers:
      - name: app
        image: quay.io/flysangel/image:app.golang' | kubectl apply -f -
deployment.apps/s1.dep created

* 建立 LoadBalancer service

$ echo '
apiVersion: v1
kind: Service
metadata:
  name: s1
  annotations:
    metallb.universe.tf/address-pool: mlb1
spec:
  ports:
  - port: 80
    targetPort: 8080
  selector:
    app: s1.dep
  type: LoadBalancer' | kubectl apply -f -
service/s1 created

$ kubectl get pod
NAME                      READY   STATUS    RESTARTS   AGE
s1.dep-69546455d6-24nhz   1/1     Running   0          11m
s1.dep-69546455d6-8pbb8   1/1     Running   0          11m
  
$ kubectl get svc
NAME         TYPE           CLUSTER-IP      EXTERNAL-IP     PORT(S)        AGE
kubernetes   ClusterIP      10.43.0.1       <none>          443/TCP        3h51m
s1           LoadBalancer   10.43.160.239   192.168.11.75   80:30143/TCP   7m57s

* 驗證 LoadBalancer 功能

$ curl -w "\n" http://192.168.11.75/hostname
{"message":"s1.dep-69546455d6-24nhz"}
$ curl -w "\n" http://192.168.11.75/hostname
{"message":"s1.dep-69546455d6-24nhz"}
$ curl -w "\n" http://192.168.11.75/hostname
{"message":"s1.dep-69546455d6-8pbb8"}