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# 在 Ubuntu 上安装 kubeadm
## 安装之前
基本配置要求：
- One or more machines running one of:
- Ubuntu 16.04+
- Debian 9
- CentOS 7
- RHEL 7
- Fedora 25/26 (best-effort)
- HypriotOS v1.0.1+
- Container Linux (tested with 1576.4.0)
- 2 GB or more of RAM per machine (any less will leave little room for your
apps)
- 2 CPUs or more
- Full network connectivity between all machines in the cluster (public or
private network is fine)
- Unique hostname, MAC address, and product_uuid for every node. See here for
more details.
- Certain ports are open on your machines. See here for more details.
- Swap disabled. You MUST disable swap in order for the kubelet to work
properly.
## 安装 Docker
```
apt-get update
apt-get install -y apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -
add-apt-repository "deb https://download.docker.com/linux/$(. /etc/os-release; echo "$ID") $(lsb_release -cs) stable"
apt-get update && apt-get install -y docker-ce=$(apt-cache madison docker-ce | grep 17.03 | head -1 | awk '{print $3}')
```
## 安装 kubeadm, kubelet and kubectl
```
apt-get update && apt-get install -y apt-transport-https curl
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb http://apt.kubernetes.io/ kubernetes-xenial main
EOF
apt-get update
apt-get install -y kubelet kubeadm kubectl
apt-mark hold kubelet kubeadm kubectl
```
## 运行
```
kubeadm init
```