## 为什么要离线安装

1. 大家懂的原因
2. 可能需要企业内部部署

## 网络需求

* Inbound Rules for K3s Server Nodes

|PROTOCOL	|PORT	|SOURCE	|DESCRIPTION    |
|---        |---    |---    |---            |
|TCP	|6443	|K3s server nodes   |Kubernetes API     |
|UDP	|8472	|K3s server and agent nodes	|Required only for Flannel VXLAN |
|TCP	|10250	|K3s server and agent nodes	|kubelet    |

* iptables 小于 1.8

## 准备工作

* 需要私有 ```Docker Registry``` https://docs.docker.com/registry/
* 搭建一个 k3s 所需要的私有 ```Docker Registry`` 
    * https://rancher.com/docs/k3s/latest/en/installation/private-registry/

## 下载安装包

* 根据服务器的架构，在官方 [release](https://github.com/rancher/k3s/releases) 下载

```
uname -m
```

* x86 服务器如图下载 k3s 和 k3s-airges-images-amd64.tar
* ![IMAGE](https://img.jiaxin.im/dugong/images/5c439b926de75cfcbccf9beafae33ee6.jpg)


* 将 k3s-airgap-images-$ARCH.tar 复制至 ```/var/lib/rancher/k3s/agent/images/``` 目录下

```
sudo mkdir -p /var/lib/rancher/k3s/agent/images/
sudo cp ./k3s-airgap-images-$ARCH.tar /var/lib/rancher/k3s/agent/images/
```

* 将 k3s 复制至 ```/usr/local/bin``` 目录下

## 下载安装脚本
```
curl -sfL   https://get.k3s.io/ -o install.sh
```

## 安装 k3s server 
```
INSTALL_K3S_SKIP_DOWNLOAD=true ./install.sh --docker  
```



## 安装 k3s nodes

* 首先获得 master token  ```/var/lib/rancher/k3s/server/node-token```

```
INSTALL_K3S_SKIP_DOWNLOAD=true K3S_URL=https://myserver:6443 K3S_TOKEN=mynodetoken ./install.sh --docker
```

> 注：
>> ```--docker``` 使用 docker 替代k3s自带的容器

离线安装 k3s

GitHub