centos离线安装k3s集群

╰+攻爆jí腚メ 2023-05-22 22:23 1阅读 0赞

# k3s架构 #

![k3s 架构][k3s]

# 机器准备 #

[root@demo k3s]# uname -a
    Linux demo 3.10.0-957.27.2.el7.x86_64 #1 SMP Mon Jul 29 17:46:05 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

两台机器

<table> 
 <thead> 
  <tr> 
   <th>ip</th> 
   <th>角色</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>192.168.1.102</td> 
   <td>server</td> 
  </tr> 
  <tr> 
   <td>192.168.1.105</td> 
   <td>agent</td> 
  </tr> 
 </tbody> 
</table>

# 二 进制准备 #

以下每台机器都要执行  
下载[k3s][k3s 1]  
下载[镜像][Link 1]

下载安装脚本[install.sh][]

# 三安装master节点 #

1.创建镜像目录并把镜像复制到 /var/lib/rancher/k3s/agent/images/目录

mkdir -p /var/lib/rancher/k3s/agent/images/
    cp  k3s-airgap-images-$ARCH.tar /var/lib/rancher/k3s/agent/images/

2.安装

chmod +x k3s
    cp k3s /usr/local/bin/
    INSTALL_K3S_SKIP_DOWNLOAD=true ./install.sh

3.查看节点信息  
![节点信息][20200418163920392.png]  
4.查看服务是否正常  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxODE2Mzc1_size_16_color_FFFFFF_t_70]  
服务不正常的话，那就是镜像的问题  
可以通过`ctr`命令修改镜像  
例子

[root@demo k3s]# ctr images tag docker.io/library/traefik:1.7.19 docker.io/rancher/library-traefik:1.7.19

和docker相关指令对比，如下图  
![command][]

# 安装agent #

1.在master节点上查找token

[root@demo k3s]# cat /var/lib/rancher/k3s/server/node-token 
    K10bc1b860845c709d9ca29a9997bb28abc9ae4baf51ae7a48e24cfa669f062f6fd::server:6985a3b11e7b4c38479ccd06ad9cf669

2.安装

chmod +x k3s
    cp k3s /usr/local/bin/
    
    [root@promote ~]# cp k3s-airgap-images-amd64.tar /var/lib/rancher/k3s/agent/images/
    
    [root@promote ~]# INSTALL_K3S_SKIP_DOWNLOAD=true K3S_URL=https://192.168.1.102:6443 K3S_TOKEN=K10bc1b860845c709d9ca29a9997bb28abc9ae4baf51ae7a48e24cfa669f062f6fd::server:6985a3b11e7b4c38479ccd06ad9cf669 sh install.sh 
    [INFO]  Skipping k3s download and verify
    [INFO]  Creating /usr/local/bin/kubectl symlink to k3s
    [INFO]  Creating /usr/local/bin/crictl symlink to k3s
    [INFO]  Creating /usr/local/bin/ctr symlink to k3s
    [INFO]  Creating killall script /usr/local/bin/k3s-killall.sh
    [INFO]  Creating uninstall script /usr/local/bin/k3s-agent-uninstall.sh
    [INFO]  env: Creating environment file /etc/systemd/system/k3s-agent.service.env
    [INFO]  systemd: Creating service file /etc/systemd/system/k3s-agent.service
    [INFO]  systemd: Enabling k3s-agent unit
    Created symlink from /etc/systemd/system/multi-user.target.wants/k3s-agent.service to /etc/systemd/system/k3s-agent.service.
    [INFO]  systemd: Starting k3s-agent

3.查看结果

[root@demo k3s]# kubectl get nodes
    NAME                      STATUS   ROLES    AGE     VERSION
    demo                      Ready    master   7h15m   v1.17.4+k3s1
    promote.cache-dns.local   Ready    <none>   28m     v1.17.4+k3s1

end  
参考  
[k3s官网][k3s 2]

[k3s]: /images/20230521/1f89c438df47493daeed748726cc8d96.png
[k3s 1]: https://github.com/rancher/k3s/releases/download/v1.17.4%2Bk3s1/k3s
[Link 1]: https://github.com/rancher/k3s/releases/download/v1.17.4%2Bk3s1/k3s-airgap-images-amd64.tar
[install.sh]: https://github.com/rancher/k3s/blob/master/install.sh
[20200418163920392.png]: /images/20230521/736dc4f9416048f082ede24bbd9d4477.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxODE2Mzc1_size_16_color_FFFFFF_t_70]: /images/20230521/073da684b734425eaa650bb7b6d76992.png
[command]: /images/20230521/50a2360b61a74cdaab4ec065f7ef6a77.png
[k3s 2]: https://rancher.com/docs/k3s/latest/en/installation/airgap/#install-k3s