k8s中MetalLB的使用

1.官方链接https://metallb.universe.tf/concepts/操作步骤step 1 安装MetalLBkubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.12.1/manifests/namespace.yamlkubectl apply -f https://raw.githubuse

Rory602

2285人浏览 · 2022-05-06 08:52:44

Rory602 · 2022-05-06 08:52:44 发布

1.官方链接
https://metallb.universe.tf/concepts/

操作步骤

step 1 安装MetalLB

kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.12.1/manifests/namespace.yaml
kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.12.1/manifests/metallb.yaml

step 2 配置config, 以`layer2`协议为例

config.yaml的内容如下：

apiVersion: v1
kind: ConfigMap
metadata:
  namespace: metallb-system
  name: config
data:
  config: |
    address-pools:
    - name: dev-public-ips
      protocol: layer2
      addresses:
      - 10.0.2.100-10.0.2.200

其中，dev-public-ips为自定义名称，后面会用到， addresses为自定义地址池

step 3 以nginx为例

(1) Deployment
nginx-deployment.yaml 的内容如下

root@unode1:~/metallb/example# cat nginx-deployment.yaml 
apiVersion: apps/v1
kind: Deployment      
metadata:
name: pc-deployment
namespace: dev
spec: 
replicas: 3
selector:
  matchLabels:
    app: nginx-pod
template:
  metadata:
    labels:
      app: nginx-pod
  spec:
    containers:
    - name: nginx
      image: nginx:1.17.1
      ports:
      - containerPort: 80

应用Deployment该文件
kubectl apply -f nginx-deployment.yaml
(2) Service

root@unode1:~/metallb/example# cat service-metallb.yaml 
apiVersion: v1
kind: Service
metadata:
  name: nginx
  namespace: dev
  annotations:
    metallb.universe.tf/address-pool: dev-public-ips  #注意，dev-public-ips为config.yaml地址池的名称
spec:
  ports:
  - port: 81   #external ip的端口
    targetPort: 80 # 内部容器端口
  selector:
    app: nginx-pod
  type: LoadBalancer

应用Service文件
kubectl apply -f service-metallb.yaml
(3)参看Service

root@unode1:~/metallb/example# kubectl get svc -n dev
NAME    TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
nginx   LoadBalancer   10.109.79.140   10.0.2.101    81:30182/TCP   14h

其中81为EXTERNAL-IP的端口， 30182为node端口，访问测试如下：
测试1

root@unode1:~/metallb/example# curl 10.0.2.101:81
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>

<p><em>Thank you for using nginx.</em></p>
</body>
</html>

测试2

root@unode1:~/metallb/example# curl 10.0.2.4:30182  #10.0.2.4为node的ip
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>

<p><em>Thank you for using nginx.</em></p>
</body>
</html>

K8S/Kubernetes

K8S/Kubernetes社区为您提供最前沿的新闻资讯和知识内容

更多推荐

【深度】阿里巴巴万级规模 K8s 集群全局高可用体系之美

作者 | 韩堂、柘远、沉醉来源 | 阿里巴巴云原生公众号前言台湾作家林清玄在接受记者采访的时候，如此评价自己 30 多年写作生涯：“第一个十年我才华横溢，‘贼光闪现’，令周边黯然失色；第二个十年，我终于‘宝光现形’，不再去抢风头，反而与身边的美丽相得益彰；进入第三个十年，繁华落尽见真醇，我进入了‘醇光初现’的阶段，真正体味到了境界之美”。长夜有穷，真水无香。领略过了 K8s“身在江

K8S/Kubernetes

如何基于 K8s 构建下一代 DevOps 平台？

作者 | 孙健波（天元）导读：当前云原生 DevOps 体系现状如何？面临哪些挑战？如何通过 OAM 解决云原生 DevOps 场景下的诸多问题？云原生开发应用模型 OAM(Open Application Model) 社区核心成员孙健波将为大家一一解答，并分享如何基于 OAM 和 Kubernetes 打造无限能力的下一代 DevOps 平台。什么是 DevOps？为什么基于 Kub