multipass + k3s 搭建本地K3s高可用集群

• k3s高可用集群搭建
  • 环境
  • 开始
  • 测试一下
  • 大功告成
  • 结束

k3s高可用集群搭建

环境

1. k3s官网最新
2. multipass+hyperv

开始

1. 创建虚拟网卡

   外部 选择要连接的物理设备 网卡名WAN

2. 创建虚拟机

    数据库节点以及负载均衡节点
    multipass launch --name k8sLB --m 1G --network WAN 
    master1
    multipass launch --name k8sMS1 --m 1G --network WAN
    master12
    multipass launch --name k8sMS2 --m 1G --network WAN
    node1
    multipass launch --name k8sN1 --m 1G --network WAN
    node2
    multipass launch --name k8sN2 --m 1G --network WAN
   

3. 配置k3s

4. k8sLB配置

   安装docker

   apt-get update sudo apt-get install docker-ce docker-ce-cli containerd.io

   配置数据库

   ubuntu@k8sLB:~$ sudo docker run --name mariadb -p 3306:3306 -e MYSQL_ROOT_PASSWORD=root -v /data/mariadb/data:/var/lib/mysql -d mariadb

5. k8s Master配置

   master1 master2 使用指令启动k3s

   curl -sfL https://get.k3s.io | sh -s - server \ --token=SECRET \ --datastore-endpoint="mysql://username:password@tcp(hostname:3306)/database-name"

6. 配置负载均衡

   k8sLB 编辑nginx 配置文件

   我图省事 没用docker安装nginx

    stream{
            upstream k3sms{
                    server  192.168.0.105:6443;
                    server  192.168.0.107:6443;
            }
   
            server {
                    listen 6443;
   
                    proxy_pass k3sms;
            }
    }
   

7. 节点加入master

   curl -sfL https://rancher-mirror.rancher.cn/k3s/k3s-install.sh | INSTALL_K3S_MIRROR=cn K3S_URL=负载均衡地址 K3S_TOKEN=秘钥 sh -

测试一下

使用sudo kubectl get node命令查询节点

ubuntu@k8sMS1:~$ sudo kubectl get node
NAME     STATUS   ROLES                  AGE     VERSION
k8sms2   Ready    control-plane,master   100m    v1.25.7+k3s1
k8sms1   Ready    control-plane,master   102m    v1.25.7+k3s1
k8sn1    Ready                     24m     v1.25.7+k3s1
k8sn2    Ready                     6m10s   v1.25.7+k3s1

手动宕机ms2 n2

ubuntu@k8sMS1:~$ sudo kubectl get node
NAME     STATUS     ROLES                  AGE     VERSION
k8sms1   Ready      control-plane,master   104m    v1.25.7+k3s1
k8sn1    Ready                       26m     v1.25.7+k3s1
k8sms2   NotReady   control-plane,master   101m    v1.25.7+k3s1
k8sn2    NotReady                    7m33s   v1.25.7+k3s1

手动宕机ms1

ubuntu@k8sMS2:~$ sudo kubectl get node
NAME     STATUS     ROLES                  AGE    VERSION
k8sms2   Ready      control-plane,master   104m   v1.25.7+k3s1
k8sn2    Ready                       10m    v1.25.7+k3s1
k8sn1    Ready                       29m    v1.25.7+k3s1
k8sms1   NotReady   control-plane,master   106m   v1.25.7+k3s1

非常好用

大功告成

装个nginx尝尝k3s是啥味儿的

先装个仪表盘 wget https://github.com/cnrancher/kube-explorer/releases/download/v0.3.1/kube-explorer-linux-amd64

写(百度)个yaml

apiVersion: apps/v1
kind: Deployment
metadata:
    name: nginx-deployment
spec:
    selector:
    matchLabels:
        app: nginx
    replicas: 3
    template:
    metadata:
        labels:
        app: nginx
    spec:
        containers:
        - name: nginx
        image: nginx:alpine
        ports:
        - containerPort: 80

再写个service让其能在外网访问

apiVersion: v1
kind: Service
metadata:
    name: nginx-service
spec:
    selector:
    app: nginx
    ports:
    - protocol: TCP
    port: 80
    targetPort: 80
    nodePort: 30080
    type: NodePort

访问一下

Welcome to nginx!
If you see this page, the nginx web server is successfully installed and working. Further configuration is required.

For online documentation and support please refer to nginx.org.
Commercial support is available at nginx.com.

Thank you for using nginx.

结束