TechContainerK3S

【容器化】K3S部署安装

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本文针对版本v1.21.2+k3s1

官网

https://k3s.io/

前期准备

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# 关闭防火墙
systemctl stop firewalld

完成可联网情况下

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export INSTALL_K3S_VERSION=v1.21.2+k3s1
export INSTALL_K3S_EXEC="--write-kubeconfig ~/.kube/config --cluster-cidr  10.72.0.0/16 --service-cidr  10.73.0.0/16"
curl -sfL https://get.k3s.io | sh -

连不上Github情况下

1. 上传相关工具、k3s二进制包、k3s安装脚本、Nginx测试yaml文件到服务器

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scp k3s-selinux-0.2-1.el7_8.noarch.rpm root@xxx.xxx.xxx.xxx:/usr/local/src/
scp k3s root@xxx.xxx.xxx.xxx:/usr/local/src/
scp k3s.sh root@xxx.xxx.xxx.xxx:/usr/local/src/
scp nginx.yaml root@xxx.xxx.xxx.xxx:/usr/local/src/

2. 配置k3s二进制包的路径和权限

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cp /usr/local/src/k3s /usr/local/bin/
chmod 755 /usr/local/bin/k3s

3. yum安装相关工具

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yum install -y container-selinux selinux-policy-base
yum install -y /usr/local/src/k3s-selinux-0.2-1.el7_8.noarch.rpm

4. 执行k3s安装脚本

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export INSTALL_K3S_VERSION=v1.21.2+k3s1
export INSTALL_K3S_SKIP_DOWNLOAD=true
export INSTALL_K3S_EXEC="--write-kubeconfig ~/.kube/config --cluster-cidr  172.16.0.0/12 --service-cidr  172.16.130.0/12"
sh /usr/local/src/k3s.sh

5. 检查是否安装成功

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systemctl status k3s
kubectl get node
# 等待所有服务处于Running或Completed状态
kubectl get pod -A

结果截图：

6. 测试nginx服务

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# 创建测试nginx服务
kubectl create -f /usr/local/src/nginx.yaml
# 查看服务是否启动成功，nginx服务处于Running状态的则表明都运行成功
kubectl get pod -A

结果截图：

通过浏览器访问：https://[server-ip]:32000

k3s二进制文件地址

下载地址：https://github.com/k3s-io/k3s/releases/download/v1.21.2+k3s1/k3s

k3s-selinux地址

下载网址：https://rpm.rancher.io/k3s/stable/common/centos/7/noarch/k3s-selinux-0.2-1.el7_8.noarch.rpm

k3s.sh文件内容

下载网址：https://get.k3s.io/

nginx.yaml文件内容

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kind: Namespace
apiVersion: v1
metadata:
  name: test-project
---
kind: Service
apiVersion: v1
metadata:
  name: service-nginx-server
  namespace: test-project
  labels:
    app: service-nginx-server
spec:
  ports:
    - name: tcp-80
      protocol: TCP
      port: 80
      targetPort: 80
      nodePort: 32000
  selector:
    app: nginx-server
  type: NodePort
---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: deployment-nginx-server
  namespace: test-project
  labels:
    app: nginx-server
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx-server
  template:
    metadata:
      labels:
        app: nginx-server
    spec:
      containers:
        - name: container-nginx-server
          image: 'nginx:1.20.1-alpine'
          ports:
            - containerPort: 80
              protocol: TCP

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